Power, John

Volcano Seismology, Eruption Forecasting, Volcano Geodesy.

Website: https://www.usgs.gov/staff-profiles/john-a-power

Discipline(s): Seismology

References:

Volcanic and tectonic sources of seismicity near the Tanaga Volcanic Cluster, Alaska, 2023

Lally, K.F., Caplan-Auerbach, J., and Power, J.A., 2023, Volcanic and Tectonic Sources of Seismicity Near the Tanaga Volcanic Cluster, Alaska: Geochemistry, Geophysics, Geosystems v. 24, article no. e2023GC010891, 19 p. https://doi.org/10.1029/2023GC010891.

Volcanic earthquake catalog enhancement using integrated detection, matched-filtering, and relocation tools, 2023

Tan. D., Fee, D., Hotovec-Ellis, A.J., Pesicek, J.D., Haney, M.M., Power, J.A., and Girona, T., 2023, Volcanic earthquake catalog enhancement using integrated detection, matched-filtering, and relocation tools: Frontiers in Earth Science v. 11, 1158442. https://doi.org/10.3389/feart.2023.1158442
Full-text PDF 43.1 MB

Alaska Volcano Observatory archive of seismic drum records of eruptions of Augustine Volcano (1986), Redoubt Volcano (1989-90), Mount Spurr (1992), and Pavlof Volcano (1996), and the 1996 earthquake swarm at Akutan Peak, 2022

Dixon, J.P., and Power, J.A., 2022, Alaska Volcano Observatory archive of seismic drum records of eruptions of Augustine Volcano (1986), Redoubt Volcano (1989-90), Mount Spurr (1992), and Pavlof Volcano (1996), and the 1996 earthquake swarm at Akutan Peak: U.S. Geological Survey Data Report 1146, 10 p., https://doi.org/10.3133/dr1146.

Complex magmatic-tectonic interactions during the 2020 Makushin Volcano, Alaska, earthquake swarm, 2022

Lanza, F., Roman, D.C., Power, J.A., Thurber, C.H., and Hudson, T., 2022, Complex magma-tectonic interactions during the 2020 Makushin Volcano, Alaska earthquake swarm: Earth and Planetary Science Letters, v. 587, https://doi.org/10.1016/j.epsl.2022.117538.

Earthquakes indicated stress field change during the 2006 unrest of Augustine Volcano, Alaska, 2022

Yan Zhan, Roman, D.C., Le Mevel, Helene, and Power, J.A., 2022, Earthquakes indicated stress field change during the 2006 unrest of Augustine Volcano, Alaska: Geophysical Research Letters, v. 49, no. 10, p. 13, https://doi.org/10.1029/2022GL097958.

Volcanic seismicity beneath Chuginadak Island, Alaska (Cleveland and Tana volcanoes): implications for magma dynamics and eruption forecasting, 2021

Power, J.A., Roman, D.C., Lyons, J.J., Haney, M.M., Rasmussen, D.J., Plank, Terry, Nicolaysen, K.P., Izbekov, Pavel, Werner, Cynthia, Kaufman, A.M., 2021, Volcanic seismicity beneath Chuginadak Island, Alaska (Cleveland and Tana volcanoes): implications for magma dynamics and eruption forecasting: Journal of Volcanology and Geothermal Research, v. 412, no.107182, 18 p., 10.1016/j.jvolgeores.2021.107182.

2017 Volcanic activity in Alaska-Summary of events and response of the Alaska Volcano Observatory, 2020

Dixon, J.P., Cameron, C.E., Iezzi, A.M., Power, J.A., Wallace, K., and Waythomas, C.F., 2020, 2017 Volcanic activity in Alaska-Summary of events and response of the Alaska Volcano Observatory: U.S. Geological Survey Scientific Investigations Report 2020-5102, 61 p., https://doi.org/10.3133/sir20205102.

Goals and development of the Alaska Volcano Observatory seismic network and application to forecasting and detecting volcanic eruptions, 2020

Power, J.A., Haney, M.M., Botnick, S.M., Dixon, J.P., Fee, David, Kaufman, A.M., Ketner, D.M., Lyons, J.J., Parker, Tom, Paskievitch, J.F., Read, C.W., Searcy, Cheryl, Stihler, S.D., Tepp, Gabrielle, and Wech, A.G., 2020, Goals and development of the Alaska Volcano Observatory seismic network and application to forecasting and detecting volcanic eruptions: Seismological Research Letters, doi: 10.1785/0220190216 .

Linking subsurface to surface using gas emission and melt inclusion data at Mount Cleveland volcano, Alaska, 2020

Werner, Cindy, Rasmussen, D. J., Plank, Terry, Kelly, P. J., Kern, Christoph, Lopez, Taryn, Gliss, Jonas, Power, J.A., Roman, D.C., Izbekov, Pavel, and Lyons, John, 2020, Linking subsurface to surface using gas emission and melt inclusion data at Mount Cleveland volcano, Alaska: Geochemistry, Geophysics, Geosystems, v. 125, article no. e2019GC008882, 33 p. https://doi.org/10.1029/2019GC008882.

Ps-P tomography of a midcrustal magma reservoir beneath Cleveland volcano, Alaska, 2020

Portner, D.E., Wagner, L.S., Janiszewski, H.A., Roman, D.C., and Power, J.A., 2020, Ps-P tomography of a midcrustal magma reservoir beneath Cleveland volcano, Alaska: Geophysical Research Letters, v. 47, article no. e2020GL090406, 10 p., https://doi.org/10.1029/2020GL090406.

Seismic character and progression of explosive activity during the 2016-2017 eruption of Bogoslof volcano, Alaska, 2020

Searcy, Cheryl, and Power, J.A., 2020, Seismic character and progression of explosive activity during the 2016-2017 eruption of Bogoslof volcano, Alaska: Bulletin of Volcanology, n. 82, doi: https://doi.org/10.1007/s00445-019-1343-4.

Seismic tomography of compressional wave velocity and attenuation structure for Makushin Volcano, Alaska, 2020

Lanza, Federica, Thurber, C.H., Syracuse, E.M., Power, J.A., and Ghosh, Abhijit, 2020, Seismic tomography of compressional wave velocity and attenuation structure for Makushin Volcano, Alaska: Journal of Volcanology and Geothermal Research, doi:10.1016/j.jvolgeores.2020.106804

A unified catalog of earthquake hypocenters and magnitudes at volcanoes in Alaska: 1989 to 2018, 2019

Power, J.A., Friberg, P.A., Haney, M.M., Parker, T., Stihler, S.D., and Dixon, J.P., 2019, A unified catalog of earthquake hypocenters and magnitudes at volcanoes in Alaska—1989 to 2018: U.S. Geological Survey Scientific Investigations Report 2019–5037, 17 p., https://doi.org/10.3133/sir20195037.

Catalog of earthquake parameters and description of seismograph and infrasound stations at Alaskan volcanoes - January 1, 2013, through December 31, 2017, 2019

Dixon, J.P., Stihler S.D., Haney, M.M., Lyons, J.J., Ketner, D.M., Mulliken, K.M., Parker, T., and Power, J.A., 2019, Catalog of earthquake parameters and description of seismograph and infrasound stations at Alaskan volcanoes - January 1, 2013, through December 31, 2017: U.S. Geological Survey Data Series 1115, 92 p., https://doi.org/10.3133/ds1115.

Analysis of the Alaska Volcano Observatory's response time to volcanic explosions - 1989 to 2016, 2018

Power, J.A., and Cameron, C.E., 2018, Analysis of the Alaska Volcano Observatory's response time to volcanic explosions - 1989 to 2016: Frontiers in Earth Science, v. 6, https://doi.org/10.3389/feart.2018.00072 .

When does eruption run-up begin? Multidisciplinary insight from the 1999 eruption of Shishaldin volcano, 2018

Rasmussen, D.J., Plank, T.P., Roman, D.C., Power, J.A., Bodnar, R.J., and Hauri, E.H., 2018, When does eruption run-up begin? Multidisciplinary insight from the 1999 eruption of Shishaldin volcano: Earth and Planetary Science Letters, v. 486, 14, p., https://doi.org/10.1016/j.epsl.2018.01.001.

Catalog of earthquake hypocenters at Alaskan volcanoes: January 1 through December 31, 2012, 2013

Dixon, J.P., Stihler, S.D, Power, J.A., Haney, Matt, Parker, Tom, Searcy, C.K., and Prejean, Stephanie, 2013, Catalog of earthquake hypocenters at Alaskan volcanoes: January 1 through December 31, 2012: U.S. Geological Survey Data Series 789, 84 p., available at http://pubs.usgs.gov/ds/789/ .
full-text pdf 6.5 MB

Characterization of seismic events during the 2009 eruption of Redoubt Volcano, Alaska, 2013

Ketner, Dane, and Power, John, 2013, Characterization of seismic events during the 2009 eruption of Redoubt Volcano, Alaska: Journal of Volcanology and Geothermal Research, v. 259, p. 45-62, doi:10.1016/j.jvolgeores.2012.10.007
full-text pdf 8.9 MB

Seismic observations of Redoubt Volcano, Alaska - 1989-2010 and a conceptual model of the Redoubt magmatic system, 2013

Power, J.A., Stihler, S.D., Chouet, B.A., Haney, M.M., and Ketner, D.M., 2013, Seismic observations of Redoubt Volcano, Alaska - 1989-2010 and a conceptual model of the Redoubt magmatic system: Journal of Volcanology and Geothermal Research, v. 259, p. 31-44, doi:10.1016/j.jvolgeores.2012.09.014
full-text pdf 3.8 MB

Source characterization for an explosion during the 2009 eruption of Redoubt Volcano from very-long-period seismic waves, 2013

Haney, M.M., Chouet, B.A., Dawson, P.B., and Power, J.A., 2013, Source characterization for an explosion during the 2009 eruption of Redoubt Volcano from very-long-period seismic waves: Journal of Volcanology and Geothermal Research, v. 259, p. 77-88, doi:10.1016/j.jvolgeores.2012.04.018

Catalog of earthquake hypocenters at Alaskan volcanoes: January 1 through December 31, 2011, 2012

Dixon, J.P., Stihler, S.D., Power, J.A., and Searcy, C.K., 2012, Catalog of earthquake hypocenters at Alaskan volcanoes: January 1 through December 31, 2011: U.S. Geological Survey Data Series 730, 82 p., available online at http://pubs.usgs.gov/ds/730/pdf/ds730.pdf .

Katmai scientific studies, 2012

Winfree, Robert, with contributions from Bacon, C.R., Bennett, A.J., Bennington, Ninfa, Berg, E.E., Brooks, Margi, Coletti, H.A., Coombs, M.L., Fierstein, Judy, Freeburg, Gary, Frost, G.V., Haney, Matthew, Jorgenson, M.T., Miller, A.E., Moran, Seth, Murphy, Rachel, Partnow, Patricia, Paskievitch, John, Stevens, D.P., Powell, Lee, Power, John, Prejean, S.G., Schaaf, Jeanne, Sherriff, R.L., Thurber, Clifford, and Welchman, R.A., 2012, Katmai science studies: Alaska Park Science Journal, v. 11, n. 1, 96 p., available online at http://www.nps.gov/akso/nature/science/ak_park_science/volume_11_issue_1.cfm .

Multiple causes for non-eruptive seismic swarms at Mt. Martin, Katmai Volcanic Cluster, Alaska (2004-2008), 2012

O'Brien, J.F., Roman, D.C., Dixon, J.P., Power, J.A., and Arnold, Richard, 2012, Multiple causes for non-eruptive seismic swarms at Mt. Martin, Katmai Volcanic Cluster, Alaska (2004-2008): Journal of Volcanology and Geothermal Research, v. 229-230, p. 13-22, doi: 10.1016/j.volgeores.2012.03.011.

The 2009 eruption of Redoubt Volcano, Alaska, 2012

Schaefer, J.R., ed., 2012, The 2009 eruption of Redoubt Volcano, Alaska, with contributions by Bull, Katharine, Cameron, Cheryl, Coombs, Michelle, Diefenbach, Angie, Lopez, Taryn, McNutt, Steve, Neal, Christina, Payne, Allison, Power, John, Schneider, Dave, Scott, William, Snedigar, Seth, Thompson, Glenn, Wallace, Kristi, Waythomas, Chris, Webley, Peter, and Werner, Cynthia: Alaska Division of Geological & Geophysical Surveys Report of Investigation 2011-5, 45 p., available at http://www.dggs.alaska.gov/pubs/id/23123.

Volcanic earthquakes in Alaska's National Parks, 2012

Prejean, Stephanie, Moran, Seth, and Power, John, 2012, Volcanic earthquakes in Alaska's National Parks: in Winfree, Robert (project lead), Katmai Science Studies: Alaska Park Science Journal, v. 11, n. 1, p. 40-45, available online at http://www.nps.gov/akso/nature/science/ak_park_science/volume_11_issue_1.cfm .

Catalog of earthquake hypocenters at Alaskan volcanoes: January 1 through December 31, 2010, 2011

Dixon, J.P., Stihler, S.D., Power, J.A., and Searcy, C.K., 2011, Catalog of earthquake hypocenters at Alaskan volcanoes: January 1 through December 31, 2010: U.S. Geological Survey Data Series 645, 82 p., available online at http://pubs.usgs.gov/ds/645/

Determining the seismic source mechanism and location for an explosive eruption with limited observational data: Augustine Volcano, Alaska, 2011

Dawson, P.B., Chouet, B.A., and Power, John, 2011, Determining the seismic source mechanism and location for an explosive eruption with limited observational data: Augustine Volcano, Alaska: Geophysical Research Letters, v. 38, L03302, doi:10.1029/2010GL045977, 5 p.

Mechanism of the 1996-97 non-eruptive volcano-tectonic earthquake swarm at Iliamna Volcano, Alaska, 2011

Roman, D.C., and Power, J.A., 2011, Mechanism of the 1996-97 non-eruptive volcano-tectonic earthquake swarm at Iliamna Volcano, Alaska: Bulletin of Volcanology, v. 73, n. 2, p. 143-153, doi:10.1007/s00445-010-0439-7 .

The Augustine magmatic system as revealed by seismic tomography and relocated earthquake hypocenters from 1994 through 2009, 2011

Syracuse, E.M., Thurber, C.H., and Power, J.A., 2011, The Augustine magmatic system as revealed by seismic tomography and relocated earthquake hypocenters from 1994 through 2009: Journal of Geophysical Research, v. 116, B09306, doi: 10.1029/2010JB008129 , 11 p.

A two-step procedure for calculating earthquake hypocenters at Augustine Volcano, 2010

Lalla, D.J., and Power, J.A. 2010, A two-step procedure for calculating earthquake hypocenters at Augustine Volcano, chapter 7 of Power, J.A., Coombs, M.L., and Freymueller, J.T., eds., The 2006 eruption of Augustine Volcano, Alaska: U.S. Geological Survey Professional Paper 1769, p. 129-142 and software [http://pubs.usgs.gov/pp/1769/chapters/p1769_chapter07].

Catalog of earthquake hypocenters at Alaskan volcanoes: January 1 through December 31, 2009, 2010

Dixon, J.P., Stihler, S.D., Power, J.A., and Searcy, C.K., 2010, Catalog of earthquake hypocenters at Alaskan volcanoes: January 1 through December 31, 2009: U.S. Geological Survey Data Series 531, 84 p., available online at http://pubs.usgs.gov/ds/531/ .

Earthquake waveform similarity and evolution at Augustine Volcano from 1993 to 2006, 2010

DeShon, H.R., Thurber, C.H., and Power, J.A., 2010, Earthquake waveform similarity and evolution at Augustine Volcano from 1993 to 2006, chapter 5 of Power, J.A., Coombs, M.L., and Freymueller, J.T., eds., The 2006 eruption of Augustine Volcano, Alaska: U.S. Geological Survey Professional Paper 1769, p. 103-118 [http://pubs.usgs.gov/pp/1769/chapters/p1769_chapter05.pdf].

Geodetic constraints on magma movement and withdrawal during the 2006 eruption of Augustine Volcano, 2010

Cervelli, P.F., Fournier, T.J., Freymueller, J.T., Power, J.A., Lisowski, Michael, and Pauk, B.A., 2010, Geodetic constraints on magma movement and withdrawal during the 2006 eruption of Augustine Volcano, chapter 17 of Power, J.A., Coombs, M.L., and Freymueller, J.T., eds., The 2006 eruption of Augustine Volcano, Alaska: U.S. Geological Survey Professional Paper 1769, p. 427-452 [http://pubs.usgs.gov/pp/1769/chapters/p1769_chapter17.pdf].

Hazard information management, interagency coordination, and impacts of the 2005-2006 eruption of Augustine Volcano, 2010

Neal, C.A. Murray, T.L. Power, J.A. Adleman, J.N. Whitmore, P.M. and Osiensky, J.M. 2010, Hazard information management, interagency coordination, and impacts of the 2005-2006 eruption of Augustine Volcano, chapter 28 of Power, J.A., Coombs, M.L., and Freymueller, J.T., eds., The 2006 eruption of Augustine Volcano, Alaska: U.S. Geological Survey Professional Paper 1769, p. 645-667 [http://pubs.usgs.gov/pp/1769/chapters/p1769_chapter28.pdf].

Seismic observations of Augustine Volcano, 1970–2007, 2010

Power, J.A., and Lalla, D.J., 2010, Seismic observations of Augustine Volcano, 1970-2007, chapter 1 of Power, J.A., Coombs, M.L., and Freymueller, J.T., eds., The 2006 eruption of Augustine Volcano, Alaska: U.S. Geological Survey Professional Paper 1769, p. 3-40 [http://pubs.usgs.gov/pp/1769/chapters/p1769_chapter01.pdf].

The 2006 eruption of Augustine Volcano, Alaska, 2010

Power, J.A., Coombs, M.L., and Freymueller, J.T., eds., 2010, The 2006 eruption of Augustine Volcano, Alaska: U.S. Geological Survey Professional Paper 1769, 667 p., 1 plate, scale 1:20,000, and data files. Available online at http://pubs.usgs.gov/pp/1769/ .

The January 2006 volcanic-tectonic earthquake swarm at Mount Martin, Alaska, 2009

Dixon, J.P., and Power, J.A., 2009, The January 2006 volcanic-tectonic earthquake swarm at Mount Martin, Alaska, in Haeusseler, P.J., and Galloway, J.P., eds., Studies by the U.S. Geological Survey in Alaska: U.S. Geological Survey Professional Paper 1760-D, 17 p., available at http://pubs.usgs.gov/pp/1760/d/ .

Catalog of earthquake hypocenters at Alaskan volcanoes: January 1 through December 31, 2006, 2008

Dixon, J.P., Stihler, S.D., Power, J.A., and Searcy, Cheryl, 2008, Catalog of earthquake hypocenters at Alaskan volcanoes: January 1 through December 31, 2006: U.S. Geological Survey Data Series 326, 79 p., available at http://pubs.usgs.gov/ds/326/ .

Catalog of earthquake hypocenters at Alaskan volcanoes: January 1 through December 31, 2007, 2008

Dixon, J.P., Stihler, S.D. and Power, J.A., 2008, Catalog of earthquake hypocenters at Alaskan volcanoes: January 1 through December 31, 2007: U.S. Geological Survey Data Series 367, 82 p., available online at http://pubs.usgs.gov/ds/367/ .

Instrumentation recommendations for volcano monitoring at U.S. volcanoes under the National Volcano Early Warning System, 2008

Moran, S.C., Freymueller, J.T., LaHusen, R.G., McGee, K.A., Poland, M.P., Power, J.A., Schmidt, D.A., Schneider, D.J., Stephens, G., Werner, C.A., and White, R.A., 2008, Instrumentation recommendations for volcano monitoring at U.S. volcanoes under the National Volcano Early Warning System: U.S. Geological Survey Scientific Investigations Report 2008-5114, 47 p., available online at http://pubs.usgs.gov/sir/2008/5114/ .

The 1996 earthquake swarm and intrusion at Akutan Volcano, Alaska: an example of a failed eruption, 2008

Power, J.A., Lu, Z., Prejean, S., Wicks, C., and Dzurisin, D., 2008, The 1996 earthquake swarm and intrusion at Akutan Volcano, Alaska: an example of a failed eruption [abs.]: Eos, Transactions, American Geophysical Union, v. 89, n. 53, 1 p.

Twenty years of seismic monitoring by the Alaska Volcano Observatory, 2008

Dixon, J.P., McNutt, S.R., Power, J.A., and West, M.E., 2008, Twenty years of seismic monitoring by the Alaska Volcano Observatory [abs.]: Seismological Research Letters, v. 79, n. 2, p. 318-319.

The January 2006 volcanic-tectonic earthquake swarm at Mount Martin, Alaska, 2007

Dixon, J.P., Prejean, S.G., and Power, J.A., 2007, The January 2006 volcanic-tectonic earthquake swarm at Mount Martin, Alaska [abs].: Seismological Research Letters, v. 78, n. 2, p. 255.

Catalog of earthquake hypocenters at Alaskan volcanoes: January 1 through December 31, 2005, 2006

Dixon, J.P., Stihler, S.D., Power, J.A., Tytgat, Guy, Estes, Steve, and McNutt, S.R., 2006, Catalog of earthquake hypocenters at Alaskan volcanoes: January 1 through December 31, 2005: U.S. Geological Survey Open-File Report 2006-1264, 78 p., available at http://pubs.usgs.gov/of/2006/1264/ .

Cross-correlation analysis reveals waveform similarity in long-period events prior to eruptive activity at Mt. Spurr Volcano, Alaska, 2006

Brown, J., Deshon, H., Prejean, S., Thurber, C., and Power, J., 2006, Cross-correlation analysis reveals waveform similarity in long-period events prior to eruptive activity at Mt. Spurr Volcano, Alaska [abs.]: Seismological Research Letters, v. 77, n. 2, p. 241.

Ground deformation associated with the precursory unrest and early phases of the January 2006 eruption of Augustine Volcano, Alaska, 2006

Cervelli, P.F., Fournier, Tom, Freymueller, J., and Power, J.A., 2006, Ground deformation associated with the precursory unrest and early phases of the January 2006 eruption of Augustine Volcano, Alaska: Geophysical Research Letters, v. 33, 5 p., doi: 10.1029/2006GL027219.

The reawakening of Alaska's Augustine Volcano, 2006

Power, J.A., Nye, C.J., Coombs, M.L., Wessels, R.L., Cervelli, P.F., Dehn, J., Wallace, K.L., Freymueller, J.T., and Doukas, M.P., 2006, The reawakening of Alaska's Augustine Volcano: Eos, v. 87, n. 37, p. 373, 377.

Catalog of earthquake hypocenters at Alaskan volcanoes: January 1 through December 31, 2004, 2005

Dixon, J.P., Stihler, S.D., Power, J.A., Tytgat, Guy, Estes, Steve, Prejean, Stephanie, Sanchez, J.J., Sanches, Rebecca, McNutt, S.R., and Paskievitch, John, 2005, Catalog of earthquake hypocenters at Alaskan volcanoes: January 1 through December 31, 2004: U.S. Geological Survey Open-File Report 2005-1312, 74 p., available online at http://pubs.usgs.gov/of/2005/1312/.

Surface deformation associated with the March 1996 earthquake swarm at Akutan Island, Alaska, revealed by C-band ERS and L-band JERS radar interferometry, 2005

Lu, Zhong, Wicks, Charles, Kwoun, Ohig, Power, J.A., and Dzurisin, Daniel, 2005, Surface deformation associated with the March 1996 earthquake swarm at Akutan Island, Alaska, revealed by C-band ERS and L-band JERS radar interferometry: Canadian Journal of Remote Sensing, v. 31, p. 7-20.

Catalog of earthquake hypocenters at Alaskan volcanoes: January 1 through December 31, 2003, 2004

Dixon, J. P., Stihler, S. D., Power, J. A., Tytgat, Guy, Moran, S. C., Sanchez, J. J., McNutt, S. R., Estes, Steve, and Paskievitch, John, 2004, Catalog of earthquake hypocenters at Alaskan volcanoes: January 1 through December 31, 2003: U.S. Geological Survey Open-File Report 2004-1234, 69 p.
full-text PDF 12.3 MB

Earthquake triggering at Alaskan volcanoes following the 3 November 2002 Denali Fault Earthquake, 2004

Moran, S. C., Power, J. A., Stihler, S. D., Sanchez, J. J., and Caplan-Auerbach, Jacqueline, 2004, Earthquake triggering at Alaskan volcanoes following the 3 November 2002 Denali Fault Earthquake: Bulletin of the Seismological Society of America, v. 94, n. 6B, p. S300-S309.

Evidence for dike emplacement beneath Iliamna Volcano, Alaska in 1996, 2004

Roman, D. C., Power, J. A., Moran, S. C., Cashman, K. V., Doukas, M. P., Neal, C. A., and Gerlach, T. M., 2004, Evidence for dike emplacement beneath Iliamna Volcano, Alaska in 1996: Journal of Volcanology and Geothermal Research, v. 130, n. 3-4, p. 265-284.

Observations of deep long-period (DLP) seismic events beneath Aleutian Arc volcanoes: 1989-2002, 2004

Power, J.A, Stihler, S.D., White, R.A., and Moran, S.C., 2004, Observations of deep long-period (DLP) seismic events beneath Aleutian Arc volcanoes: 1989-2002: Journal of Volcanology and Geothermal Research, v. 138, p. 243-266.

Renewed seismic unrest at Mount Spurr Volcano, Alaska in 2004: Evidence for a magmatic intrusion, 2004

Power, J.A., Stihler, S.D., Dixon, J.P., Moran, S.C., Caplan-Auerbach, J., Prejean, S.G., McGee, K., Doukas, M.P., and Roman, D.C., 2004, Renewed seismic unrest at Mount Spurr Volcano, Alaska in 2004: Evidence for a magmatic intrusion: Eos Trans., AGU, 85(47), Fall meeting supplement, Abstract number S51A-0143.

Renewed unrest at Mount Spurr Volcano, Alaska, 2004

Power, John, 2004, Renewed unrest at Mount Spurr Volcano, Alaska: Eos, v. 85, n. 43, p. 434.

Seismic recordings of ice and debris avalanches of Iliamna Volcano (Alaska), 2004

Caplan-Auerbach, Jacqueline, Prejean, S.G., and Power, J.A., 2004, Seismic recordings of ice and debris avalanches of Iliamna Volcano (Alaska): Acta Vulcanologica, v. 16, n. 1-2, p. 9-20.

Temporal and spatial variation of local stress fields before and after the 1992 eruptions of Crater Peak Vent, Mount Spurr Volcano, Alaska, 2004

Roman, D.C., Moran, S.C., Power, J.A., and Cashman, K.V., 2004, Temporal and spatial variation of local stress fields before and after the 1992 eruptions of Crater Peak Vent, Mount Spurr Volcano, Alaska: Bulletin of the Seismological Society of America, v. 94, n. 6, p. 2366-2379.

Catalog of earthquake hypocenters at Alaskan volcanoes: January 1 through December 31, 2002, 2003

Dixon, J. P., Stihler, S. D., Power, J. A., Tytgat, Guy, Moran, S. C., Sanchez, John, Estes, Steve, McNutt, S. R., and Paskievitch, John, 2003, Catalog of earthquake hypocenters at Alaskan volcanoes: January 1 through December 31, 2002: U.S. Geological Survey Open-File Report 03-0267, 58 p.
full-text PDF 7.3 MB

Interferometric synthetic aperture radar studies of Alaska volcanoes, 2003

Lu, Zhong, Wicks, C. J., Dzurisin, Daniel, Power, John, Thatcher, Wayne, and Masterlark, Tim, 2003, Interferometric synthetic aperture radar studies of Alaska volcanoes: Earth Observation Magazine, v. 12, n. 3, p. 8-10.

A conceptual model of the Mount Spurr magmatic system from seismic and geochemical observations of the 1992 Crater Peak eruption sequence, 2002

Power, J. A., Jolly, A. D., Nye, C. J., and Harbin, M. L., 2002, A conceptual model of the Mount Spurr magmatic system from seismic and geochemical observations of the 1992 Crater Peak eruption sequence: Bulletin of Volcanology, v. 64, n. 3-4, p. 206-218.

A tectonic earthquake sequence preceding the April-May 1999 eruption of Shishaldin Volcano, Alaska, 2002

Moran, S. C., Stihler, S. D., and Power, J. A., 2002, A tectonic earthquake sequence preceding the April-May 1999 eruption of Shishaldin Volcano, Alaska: Bulletin of Volcanology, v. 64, n. 8, p. 520-524.

Catalog of earthquake hypocenters at Alaskan volcanoes: January 1, 2000 through December 31, 2001, 2002

Dixon, J. P., Stihler, S. D., Power, J. A., Tytgat, Guy, Estes, Steve, Moran, S. C., Paskievitch, John, and McNutt, S. R., 2002, Catalog of earthquake hypocenters at Alaskan volcanoes: January 1, 2000 through December 31, 2001: U.S. Geological Survey Open-File Report 02-0342, 56 p.

Magmatic inflation at a dormant stratovolcano: 1996-1998 activity at Mount Peulik volcano, revealed by satellite radar interferometry, 2002

Lu, Z., Moran, S. C., Thatcher, Wayne, Wicks, C. J., Dzurisin, D., and Power, J. A., 2002, Magmatic inflation at a dormant stratovolcano: 1996-1998 activity at Mount Peulik volcano, revealed by satellite radar interferometry: Journal of Geophysical Research, v. 107, n. 7, p. 4-13.

Preeruptive inflation and surface interferometric coherence characteristics revealed by satellite radar interferometry at Makushin Volcano, Alaska, 2002

Lu, Zhong, Power, J. A., McConnell, V. S., Wicks, C. J., and Dzurisin, Daniel, 2002, Preeruptive inflation and surface interferometric coherence characteristics revealed by satellite radar interferometry at Makushin Volcano, Alaska: Journal of Geophysical Research, v. 107, n. B11, p. 1-13.

Subsidence at Kiska Volcano, Western Aleutians, detected by satellite radar interferometry, 2002

Lu, Zhong, Masterlark, Tim, Power, John, Dzurisin, Daniel, and Wicks, C. J., 2002, Subsidence at Kiska Volcano, Western Aleutians, detected by satellite radar interferometry: Geophysical Research Letters, v. 29, n. 18-2, 4 p.

Catalog of earthquake hypocenters at Alaskan volcanoes: January 1, 1994 through December 31, 1999, 2001

Jolly, A. D., Stihler, S. D., Power, J. A., Lahr, J. C., Paskievitch, John, Tytgat, Guy, Estes, Steve, Lockheart, A. D., Moran, S. C., McNutt, S. R., and Hammond, W. R., 2001, Catalog of earthquake hypocenters at Alaskan volcanoes: January 1, 1994 through December 31, 1999: U.S. Geological Survey Open-File Report 01-0189, 22 p.
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Seismic response of the Katmai Volcanoes to the 6 December 1999 magnitude 7.0 Karluk Lake Earthquake, Alaska, 2001

Power, J. A., Moran, S. C., McNutt, S. R., Stihler, S. D., and Sanchez, J. J., 2001, Seismic response of the Katmai Volcanoes to the 6 December 1999 magnitude 7.0 Karluk Lake Earthquake, Alaska: Bulletin of the Seismological Society of America, v. 91, n. 1, p. 57-63.

Ground deformation associated with the March 1996 earthquake swarm at Akutan volcano, Alaska, revealed by satellite radar interferometry, 2000

Lu, Z., Wicks, C., Power, J. A., and Dzurisin, D., 2000, Ground deformation associated with the March 1996 earthquake swarm at Akutan volcano, Alaska, revealed by satellite radar interferometry: Journal of Geophysical Research, v. 105, n. B9, p. 21,483-21,496.

Satellite radar interferometry detected surface deformation at a dormant Aleutian volcano, 2000

Lu, Zhong, Wicks, Charles, Dzurisin, Daniel, Power, J. A., and Thatcher, Wayne, 2000, Satellite radar interferometry detected surface deformation at a dormant Aleutian volcano [abs.]: Eos, v. 81, n. 48, p. 1354.

Triggered seismicity beneath the Katmai volcanoes following the December 6, 1999 magnitude 7.0 Karluk Lake earthquake, Alaska, 2000

Power, J. A., Moran, S. C., McNutt, S. R., Stihler, S. D., and Sanchez, J. J., 2000, Triggered seismicity beneath the Katmai volcanoes following the December 6, 1999 magnitude 7.0 Karluk Lake earthquake, Alaska [abs.]: Eos, v. 81, n. 48, p. 917.

Deformation of Akutan Volcano, Alaska: revealed by satellite radar interferometry, 1999

Lu, Zhong, Wicks, C. W., Power, J. A., and Dzurisin, Daniel, 1999, Deformation of Akutan Volcano, Alaska: revealed by satellite radar interferometry [abs.]: Eos, v. 80, n. 46, p. 1196.

Measurements of slope distances and zenith angles at Augustine Volcano, Alaska, 1986, 1988, and 1989, 1998

Power, J. A., and Iwatsubo, E. Y., 1998, Measurements of slope distances and zenith angles at Augustine Volcano, Alaska, 1986, 1988, and 1989: U.S. Geological Survey Open-File Report 98-145, 17 p.

Preliminary volcano-hazard assessment for Akutan Volcano east-central Aleutian Islands, Alaska, 1998

Waythomas, C. F., Power, J. A., Richter, D. H., and McGimsey, R. G., 1998, Preliminary volcano-hazard assessment for Akutan Volcano east-central Aleutian Islands, Alaska: U.S. Geological Survey Open-File Report 98-0360, 36 p., 1 plate, scale unknown.
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Seismic image of the Mount Spurr magmatic system, 1998

Power, J. A., Villasenor, A., and Benz, H. M., 1998, Seismic image of the Mount Spurr magmatic system: Bulletin of Volcanology, v. 60, n. 1, p. 27-37.

Seismic investigations of subsurface volcanic structures and processes at Mount Spurr, Alaska, and Soufrier Hills volcano, Montserrat, West Indies, 1998

Power, J. A., 1998, Seismic investigations of subsurface volcanic structures and processes at Mount Spurr, Alaska, and Soufrier Hills volcano, Montserrat, West Indies: University of Alaska Fairbanks unpublished Ph.D. dissertation, Fairbanks, AK, 87 p.

Broadband seismology at the Alaska Volcano Observatory, 1993-1997, 1997

McNutt, S. R., Benoit, J. P., Christensen, D., Estes, S. A., Tytgat, G. C., Stihler, S. D., Weimer, S., Jolly, A. D., Robinson, M., Hansen, R. A., Lindquist, K. G., Garces, M. A., Lahr, J. C., Hammond, R. H., Power, J. A., and Paskievitch, J. F., 1997, Broadband seismology at the Alaska Volcano Observatory, 1993-1997 [abs.]: Eos, v. 78, n. 46, p. 429.

Deep long-period events associated with the 1992 eruptions of Crater Peak Vent, Mount Spurr, Alaska, 1997

Power, J. A., Jolly, A. D., Nye, C. J., and Harbin, M. L., 1997, Deep long-period events associated with the 1992 eruptions of Crater Peak Vent, Mount Spurr, Alaska [abs.]: Eos, v. 78, n. 46, p. 438.

Geodetic studies in the Novarupta area, Katmai National Park, Alaska, 1990 to 1995, 1997

Kleinman, J. W., Iwatsubo, E. Y., Power, J. A., and Endo, E. T., 1997, Geodetic studies in the Novarupta area, Katmai National Park, Alaska, 1990 to 1995: in Dumoulin, J. A. and Gray, J. E., (eds.), Geologic studies in Alaska by the U.S. Geological Survey, 1995, U.S. Geological Survey Professional Paper PP 1574, p. 83-92.
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1996 seismicity and ground deformation at Akutan Volcano, Alaska, 1996

Power, J. A., Paskievitch, J. F., Richter, D. H., McGimsey, R. G., Stelling, P. L., Jolly, A. D., and Fletcher, H. J., 1996, 1996 seismicity and ground deformation at Akutan Volcano, Alaska [abs.]: Eos, v. 77, n. 46, p. 514.

A comparison of preeruption real-time seismic amplitude measurements for eruptions at Mount St. Helens, Redoubt Volcano, Mount Spurr, and Mount Pinatubo, 1996

Endo, E. T., Murray, T. L., and Power, J. A., 1996, A comparison of preeruption real-time seismic amplitude measurements for eruptions at Mount St. Helens, Redoubt Volcano, Mount Spurr, and Mount Pinatubo: in Newhall, C. G. and Punongbayan, R. S., (eds.), Fire and mud: eruptions and lahars of Mount Pinatubo, Philippines, Quezon City and Seattle, WA, Philippine Institute of Volcanology and Seismology and University of Washington Press, p. 233-247.

Catalog of earthquake hypocenters for Augustine, Redoubt, Iliamna, and Mount Spurr volcanoes, Alaska: January 1, 1991 - December 31, 1993, 1996

Jolly, A. D., Power, J. A., Stihler, S. D., Rao, L. N., Davidson, G., Paskievitch, J. F., Estes, S. A., and Lahr, J. C., 1996, Catalog of earthquake hypocenters for Augustine, Redoubt, Iliamna, and Mount Spurr volcanoes, Alaska: January 1, 1991 - December 31, 1993: U.S. Geological Survey Open-File Report 96-0070, 90 p., 1 disk.

Computer visualization of earthquake hypocenters, 1996

Hoblitt, R. P., Mori, J., and Power, J. A., 1996, Computer visualization of earthquake hypocenters: in Newhall, C. G. and Punongbayan, R. S., (eds.), Fire and mud: eruption and lahars from Mount Pinatubo, Philippines, Seattle, WA, University of Washington Press, p. 383-385.

March 1996 seismic crisis at Akutan Volcano, central Aleutian Arc, Alaska, 1996

Keith, T. E. C., Nye, C. J., Eichelberger, J. C., Miller, T. P., and Power, J. A., 1996, March 1996 seismic crisis at Akutan Volcano, central Aleutian Arc, Alaska [abs.]: Eos, v. 77, n. 46, p. 815.

Preliminary analyses of volcanic tremor associated with 1992 eruptions of Crater Peak, Mount Spurr volcano, Alaska, 1995

McNutt, S. R., Tytgat, G. C., and Power, J. A., 1995, Preliminary analyses of volcanic tremor associated with 1992 eruptions of Crater Peak, Mount Spurr volcano, Alaska: in Keith, T. E. C., (ed.), The 1992 eruptions of Crater Peak Vent, Mount Spurr volcano, Alaska, U.S. Geological Survey Bulletin 2139, p. 161-178.
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Seismicity and forecasting of the 1992 eruptions of Crater Peak Vent, Mount Spurr volcano, Alaska: an overview, 1995

Power, J. A., Jolly, A. D., Page, R. A., and McNutt, S. R., 1995, Seismicity and forecasting of the 1992 eruptions of Crater Peak Vent, Mount Spurr volcano, Alaska: an overview: in Keith, T. E. C., (ed.), The 1992 eruptions of Crater Peak Vent, Mount Spurr volcano, Alaska, U.S. Geological Survey Bulletin 2139, p. 149-159.
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Deformation monitoring at Augustine Volcano, AK, 1994

Dzurisin, D., Iwatsubo, E. Y., Kleinman, J. W., Murray, T. L., Power, J. A., and Paskievitch, J. F., 1994, Deformation monitoring at Augustine Volcano, AK [abs.]: Eos, v. 75, n. 44, p. 166.

Seismic evolution of the 1989-1990 eruption sequence of Redoubt Volcano, Alaska, 1994

Power, J. A., Lahr, J. C., Page, R. A., Chouet, B. A., Stephens, C. D., Harlow, D. H., Murray, T. L., and Davies, J. N., 1994, Seismic evolution of the 1989-1990 eruption sequence of Redoubt Volcano, Alaska: in Miller, T. P. and Chouet, B. A., (eds.), The 1989-1990 eruptions of Redoubt Volcano, Alaska, Journal of Volcanology and Geothermal Research, v. 62, n. 1, p. 69-94.

Seismicity and stress in the vicinity of Mount Spurr volcano, south central Alaska, 1994

Jolly, A. D., Page, R. A., and Power, J. A., 1994, Seismicity and stress in the vicinity of Mount Spurr volcano, south central Alaska: Journal of Geophysical Research, v. 99, n. B8, p. 15,305-15,318.

Seismicity at 10- to 45-km depth associated with the 1992 eruptions of Crater Peak vent, Mount Spurr, Alaska, 1994

Power, J. A., and Jolly, A. D., 1994, Seismicity at 10- to 45-km depth associated with the 1992 eruptions of Crater Peak vent, Mount Spurr, Alaska [abs.]: Eos, v. 75, n. 44, p. 715.

Statistical forecasting of repetitious dome failures during the waning eruption of Redoubt Volcano, Alaska, February-April 1990, 1994

Page, R. A., Lahr, J. C., Chouet, B. A., Power, J. A., and Stephens, C. D., 1994, Statistical forecasting of repetitious dome failures during the waning eruption of Redoubt Volcano, Alaska, February-April 1990: in Miller, T. P. and Chouet, B. A., (eds.), The 1989-1990 eruptions of Redoubt Volcano, Alaska, Journal of Volcanology and Geothermal Research, v. 62, n. 1, p. 183-196.

Velocity models for locations of shallow seismicity along the northeastern portion of the Aleutian volcanic arc, 1994

Jolly, A. D., Lahr, J. C., Power, J. A., Stihler, S. D., Ward, P. L., and McNutt, S. R., 1994, Velocity models for locations of shallow seismicity along the northeastern portion of the Aleutian volcanic arc [abs.]: Eos, v. 75, n. 44, p. 423-424.

Catalog of earthquake hypocenters at Redoubt Volcano and Mt. Spurr, Alaska: October 12, 1989-December 31, 1990, 1993

Power, J. A., March, G. D., Lahr, J. C., Jolly, A. D., and Cruse, G. R., 1993, Catalog of earthquake hypocenters at Redoubt Volcano and Mt. Spurr, Alaska: October 12, 1989-December 31, 1990: U.S. Geological Survey Open-File Report 93-685-A, 57 p.

Catalog of earthquake-hypocenters at Redoubt Volcano and Mt. Spurr, Alaska: October 12, 1989-December 31, 1990, 1993

Power, J. A., March, G. D., Lahr, J. C., Jolly, A. D., and Cruse, G. R., 1993, Catalog of earthquake-hypocenters at Redoubt Volcano and Mt. Spurr, Alaska: October 12, 1989-December 31, 1990: U.S. Geological Survey Open-File Report 93-685-B, 1 5 1/4 inch disk.

Statistical forecasting of repetitious dome failures during the waning eruptions of Redoubt volcano, Alaska, February-April 1990, 1993

Page, R. A., Lahr, J. C., Chouet, B. A., Power, J. A., and Stephens, C. D., 1993, Statistical forecasting of repetitious dome failures during the waning eruptions of Redoubt volcano, Alaska, February-April 1990 [abs.]: in Workshop on Volcanic Disaster Prevention under Japan - U.S. Technology Agreement, 1, Proceedings, p. 182-207.

A comparison of baseline and pre-eruption depths of seismicity at Mt. Spurr Volcano, south-central Alaska, 1992

Jolly, A. D., Power, J. A., Page, R. A., Lahr, J. C., and Stephens, C. D., 1992, A comparison of baseline and pre-eruption depths of seismicity at Mt. Spurr Volcano, south-central Alaska [abs.]: Eos, v. 73, n. 43, p. 342.

Precursory seismicity and forecasting of the 1992 eruptions of Mount Spurr, Alaska, 1992

Power, J. A., Jolly, A. D., Stihler, S. D., Page, R. A., Lahr, J. C., Stephens, C. D., Chouet, B. A., McNutt, S. R., Davies, J. N., and March, G. D., 1992, Precursory seismicity and forecasting of the 1992 eruptions of Mount Spurr, Alaska [abs.]: Eos, v. 73, n. 43, p. 342.

The 1989-90 Redoubt and the 1992 Mt. Spurr volcanic eruptions: Response procedure of the Alaska Volcano Observatory, 1992

Miller, T. P., Power, J. A., Eichelberger, J. C., McNutt, S. R., and Davies, J. N., 1992, The 1989-90 Redoubt and the 1992 Mt. Spurr volcanic eruptions: Response procedure of the Alaska Volcano Observatory [abs.]: Eos, v. 73, n. 43, p. 68.

Alaska Volcano Observatory summary report: January 1, 1991 - February 28, 1991, 1991

Neal, C., and Power, J. (compilers), 1991, Alaska Volcano Observatory summary report: January 1, 1991 - February 28, 1991: Alaska Volcano Observatory bimonthly report series, 13 p.
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Forecasting eruptions at Redoubt Volcano, Alaska, 1991

Chouet, B. A., Page, R. A., Davies, J. N., and Power, J. A., 1991, Forecasting eruptions at Redoubt Volcano, Alaska [abs.]: Abstracts with Programs - Geological Society of America, v. 23, n. 2, p. 13.

Forecasting eruptions at Redoubt Volcano, Alaska, 1991

Chouet, B. A., Page, R. A., Davies, J. N., and Power, J. A., 1991, Forecasting eruptions at Redoubt Volcano, Alaska [abs.]: Seismological Research Letters, v. 62, n. 1, p. 25.

Seismicity in the vicinity of Mt. Spurr Volcano, south-central Alaska, based on a revised velocity model, 1991

Jolly, A. D., Page, R. A., Stephens, C. D., Lahr, J. C., Power, J. A., and Cruse, G. R., 1991, Seismicity in the vicinity of Mt. Spurr Volcano, south-central Alaska, based on a revised velocity model [abs.]: in American Geophysical Union 1991 Fall Meeting, Program and Abstracts, San Francisco, 9-13 December 1991, p. 567.

A networked computer configuration for seismic monitoring of volcanic eruptions, 1990

March, G. D., and Power, John, 1990, A networked computer configuration for seismic monitoring of volcanic eruptions: U.S. Geological Survey Open-File Report 90-0422, 19 p.

A seismic model for forecasting eruptions at Redoubt Volcano, Alaska, 1990

Chouet, B. A., Power, J. A., Davies, J. N., Miller, T. P., Page, R. A., Lahr, J. C., Murray, T. L., Harlow, D. H., Endo, E. T., and Stephens, C. D., 1990, A seismic model for forecasting eruptions at Redoubt Volcano, Alaska [abs.]: Eos, v. 71, n. 28, p. 954.

Acquisition, processing, storage, and display of seismic data during the 1989-90 eruption of Redoubt Volcano, Alaska, 1990

March, G. D., Power, J. A., Harlow, D. H., and Lahr, J. C., 1990, Acquisition, processing, storage, and display of seismic data during the 1989-90 eruption of Redoubt Volcano, Alaska [abs.]: Eos, v. 71, n. 43, p. 1709.

Alaska Volcano Observatory fall report: October 1, 1990 - December 31, 1990, 1990

Neal, C.A., and Power, J. (compilers), 1990, Alaska Volcano Observatory fall report: October 1, 1990 - December 31, 1990: Alaska Volcano Observatory bimonthly report series, 8 p.

Alaska Volcano Observatory monthly report: December 1989 - May 1990, 1990

Gardner, Cynthia, and Power, John (compilers), 1990, Alaska Volcano Observatory monthly report: December 1989 - May 1990: Alaska Volcano Observatory bimonthly report series, 98 p.

Alaska Volcano Observatory summer report: June 1, 1990 - September 30, 1990, 1990

Neal, C., and Power, J. (compilers), 1990, Alaska Volcano Observatory summer report: June 1, 1990 - September 30, 1990: Alaska Volcano Observatory bimonthly report series, 38 p.

Applications of a real-time seismic amplitude measurement system (RSAM) during the 1989-1990 eruption of Redoubt Volcano, Alaska, 1990

Murray, T. L., Power, J. A., and Endo, E. T., 1990, Applications of a real-time seismic amplitude measurement system (RSAM) during the 1989-1990 eruption of Redoubt Volcano, Alaska [abs.]: Eos, v. 71, n. 43, p. 1709.

Forecasting the December 14, 1989 and January 2, 1990 eruptions at Redoubt Volcano, Alaska, 1990

Chouet, B. A., Page, R. A., Davies, J. N., Power, J. A., Lahr, J. C., Harlow, D. H., and Stephens, C. D., 1990, Forecasting the December 14, 1989 and January 2, 1990 eruptions at Redoubt Volcano, Alaska [abs.]: Eos, v. 71, n. 43, p. 1701.

Seismic evolution of the 1989-1990 eruption of Redoubt Volcano, Alaska, 1990

Power, J., Davies, J. N., Page, R. A., March, G. D., Murray, T. L., Chouet, B., Harlow, D. H., and Lahr, J. C., 1990, Seismic evolution of the 1989-1990 eruption of Redoubt Volcano, Alaska [abs.]: Eos, v. 71, n. 43, p. 1700-1701.

The Alaska Volcano Observatory: a multisite, multiagency consortium for volcano monitoring and research, 1990

Davies, J. N., Miller, T. P., Power, J. A., and Forbes, R. B., 1990, The Alaska Volcano Observatory: a multisite, multiagency consortium for volcano monitoring and research [abs.]: Eos, v. 71, n. 43, p. 1709.

Seismicity associated with the 1986 eruption of Augustine Volcano, Alaska, 1988

Power, John, 1988, Seismicity associated with the 1986 eruption of Augustine Volcano, Alaska: University of Alaska Fairbanks unpublished M.S. thesis, 142 p.

Seismicity associated with the 1986 eruption of Mt. St. Augustine Volcano, 1988

Power, John, Kienle, Juergen, and Davies, J. N., 1988, Seismicity associated with the 1986 eruption of Mt. St. Augustine Volcano [abs.]: Eos, v. 69, n. 44, p. 1488.