Kristi manages The USGS/AVO Alaska Tephra Laboratory (ATL) and Data Center. The ATL is an interdisciplinary center for the study of tephra fall (volcanic ash) erupted from Alaskan volcanoes and serves as a regional facility for the storage and management of tephra data. The ATL houses data and physical archives including a growing reference collection for the USGS/AVO and its collaborators.
Kristi's research focus includes tephrochronology, tephrostratigraphy, and ashfall impacts.
Coombs, M.L., Cameron, C.E., Dietterich, H.R., Boyce, E.S., Wech, A.G., Grapenthin, R., Wallace, K.L., Parker, T., Lopez, T., Crass, S., Fee, D., Haney, M.M., Ketner, D., Loewen, M.W., Lyons, J.J., Nakai, J.S., Power, J.A., Botnick, S., Brewster, I., Enders, M.L., Harmon, D., Kelly, P.J., and Randall, M., 2024, From field station to forecast: managing data at the Alaska Volcano Observatory: Bulletin of Volcanology v. 86, 79. https://doi.org/10.1007/s00445-024-01766-0
Loewen, M.W., Wallace, Kristi, Coombs, M.L., and Mulliken, K.M., 2023, Tephra samples and analyses from Cook Inlet source volcanoes and Anchor Point, Alaska: Alaska Division of Geological & Geophysical Surveys Raw Data File 2023-25, 4 p. https://doi.org/10.14509/31090
Kushner, D.S., Lopez, T.M., Wallace, K.L., Damby, D.E., Kern, C., and Cameron, C.E., 2023, Estimates of volcanic mercury emissions from Redoubt Volcano, Augustine Volcano, and Mount Spurr eruption ash: Frontiers in Earth Science v. 11, 1054521. https://doi.org/10.3389/feart.2023.1054521
Lubbers, J., Loewen, M., Wallace, K., Coombs, M., and Addison, J., 2023, Probabilistic source classification of large tephra producing eruptions using supervised machine learning - an example from the Alaska-Aleutian Arc: Geochemistry, Geophysics, Geosystems v. 24, no. 11, e2023GC011037. https://doi.org/10.1029/2023GC011037.
Koffman, B.G., Yoder, M.F., Methven, Taylor, Hanschka, Lena, Sears, H.B., Saylor, P.L., and Wallace, K.L., 2021, Glacial dust surpasses both volcanic ash and desert dust in its iron fertilization potential: Global Biogeochemical Cycles, v. 35, e2020GB006821, doi: 10.1029/2020GB006821.
Cameron, C.E., Dixon, J.P., Waythomas, C.F., Iezzi, A.M., Wallace, K.L., McGimsey, R.G., and Bull, K.F., 2020, 2016 Volcanic activity in Alaska-Summary of events and response of the Alaska Volcano Observatory: U.S. Geological Survey Scientific Investigations Report 2020-5125, 63 p., https://doi.org/10.3133/sir20205125.
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.
Lopez, Taryn, Lieven, Clarisse, Schwaiger, Hans, Van Eaton, Alexa, Loewen, Matthew, Fee, David, Lyons, John, Wallace, Kristi, Searcy, Cheryl, Wech, Aaron, Haney, Matthew, Schnieder, David, and Graham, Nathan, 2020, Constraints on eruption processes and event masses for the 2016-2017 eruption of Bogoslof volcano, Alaska, through evalution of IASI satellite SO2 masses and complementary datasets: Bulletin of Volcanology, v. 82, doi: https://doi.org/10.1007/s00445-019-1348-z.
Waythomas, C.F., Loewen, M., Wallace, K.L., Cameron, C.E., and Larsen, J.F., 2020, Geology and eruptive history of Bogoslof volcano: Bulletin of Volcanology, v. 82, doi: https://doi.org/10.1007/s00445-019-1352-3.
Woods, T.W., Genareau, K., and Wallace, K.L., 2020, Influence of grain size and shape on volcanic ash electrical conductivity: Journal of Volcanology and Geothermal Research, v. 393, no. 106788, 9 p., doi: 10.1016/j.jvolgeores.2020.106788.
Bolton, M.S.M., Jensen, B.J.L., Wallace, Kristi, Praet, Nore, Fortin, David, Kaufman, Darrell, and De Batist, Marc, 2020, Machine learning classifiers for attributing tephra to source volcanoes: an evalution of methods for Alaska tephras: Journal of Quaternary Science, v. 35, n. 1-2, p. 81-92, doi:10.1002/jqs.3170.
Wallace, K.L., Cameron, C.E., Waythomas, C.F., and Perreault, J.M., 2020, Major-oxide and trace-element geochemical data from the tephra collected on Veniaminof volcano, Alaska: Alaska Division of Geological & Geophysical Surveys Raw Data File 2020-17, 5 p. https://doi.org/10.14509/30578
Schneider, D.J., Van Eaton, A.R., and Wallace, K.L., 2020, Satellite observations of the 2016-2017 eruption of Bogoslof volcano: aviation and ash fallout hazard implications from a water-rich eruption: Bulletin of Volcanology, v, 82, doi: https://doi.org/10.1007/s00445-020-1361-2.
Coombs, Michelle, Wallace, Kristi, Cameron, Cheryl, Lyons, John, Wech, Aaron, Angeli, Kim, and Cervelli, Peter, 2019, Overview, chronology, and impacts of the 2016-2017 eruption of Bogoslof volcano, Alaska: Bulletin of Volcanology, v, 81, n. 62, doi:10.1007/s00445-019-1322-9.
Loewen, M.L., Izbekov, Pavel, Moshrefzadeh, Jamshid, Coombs, Michelle, Larsen, Jessica, Graham, Nathan, Harbin, Michelle, Waythomas, Christopher, and Wallace, Kristi, 2019, Petrology of the 2016-2017 eruption of Bogoslof Island, Alaska: Bulletin of Volcanology v. 81, n. 72, 20 p., doi:10.1007/s00445-019-1333-6.
Wallace, K.L., and Schwaiger, H.F., 2019, Volcanic ash resuspension from the Katmai region: Alaska Park Science, v. 18, n. 1., p. 63-70.
Wallace, K.L., Hayden, L.A., and Neal, C.A., 2017, Major-element glass compositions of tephra from the circa 3.6 ka eruption of Aniakchak volcano, Alaska Peninsula, Alaska: Alaska Division of Geological & Geophysical Surveys Raw Data File 2017-9, 9 p. http://doi.org/10.14509/29777
Coombs, M.L., Wech, A.G., Haney, M.M., Lyons, J.J., Schneider, D.J., Schwaiger, H.F., Wallace, K.L., Fee, David, Freymueller, J.T., Schaefer, J.R., and Tepp, Gabrielle, 2018, Short-term forecasting and detection of explosions during the 2016-2017 eruption of Bogoslof Volcano, Alaska: Frontiers in Earth Science, v. 6, article 122, doi: 10.3389/feart.2018.00122 .
Dixon, J.P., Cameron, C.E., Iezzi, A.M., and Wallace, Kristi, 2017, 2015 Volcanic activity in Alaska-Summary of events and response of the Alaska Volcano Observatory: U.S. Geological Survey Scientific Investigations Report 2017-5104, 61 p., https://doi.org/10.3133/sir20175104.
Werner, Cynthia, Kern, Christoph, Coppola, Diego, Lyons, J.J., Kelly, P.J., Wallace, K.L., Schneider, D.J., and Wessels, R.L., 2017, Magmatic degassing, lava dome extrusion, and explosions from Mount Cleveland volcano, Alaska, 2011-2015: Insights into the continuous nature of volcanic activity over multi-year timescales: Journal of Volcanology and Geothermal Research, 13 p. doi: http://dx.doi.org/10.1016/j.jvolgeores.2017.03.001
Cherkinsky, A., and Wallace, K., 2017, Radiocarbon Age of Soil Organic Matter Fractions Buried by Tephra in Alaska: Radiocarbon, v. 59, n. 2, p. 465-472.
Waythomas, C.F., Haney, M.M., Wallace, K.L., Cameron, C.E., and Schneider, D.J., 2017, The 2014 eruptions of Pavlof Volcano, Alaska: U.S. Geological Survey Scientific Investigations Report 2017-5129, 27 p., https://doi.org/10.3133/sir20175129.
Davies, L. J., Jensen, B. J., Froese, D. G., and Wallace, K. L., 2016, Late Pleistocene and Holocene tephrostratigraphy of interior Alaska and Yukon: Key beds and chronologies over the past 30,000 years: Quaternary Science Reviews, v. 146, p. 28-53.
Wallace, K., Snedigar, S., and Cameron, C., 2015, 'Is Ash Falling?', an online ashfall reporting tool in support of improved ashfall warnings and investigations of ashfall processes: Journal of Applied Volcanology, v. 4, n. 8, 10 p., doi:10.1186/s13617-014-0022-6
Van Eaton, A.R., Mastin, L.G., Herzog, M., Schwaiger, H.F., Schneider, D.J., Wallace, K.L., and Clarke, A.B., 2015, Hail formation triggers rapid ash aggregation in volcanic plumes: Nature Communications, v. 6, n. 7860, 7 p., doi: 10.1038/ncomms8860 .
Wallace, K.L., Coombs, M.L., Hayden, L.A., and Waythomas, C.F., 2014, Significance of a near-source tephra-stratigraphic sequence to the eruptive history of Hayes Volcano, south-central Alaska: U.S. Geological Survey Scientific Investigations Report 2014-5133, 32 p., available online at: http://pubs.usgs.gov/sir/2014/5133/
Coombs, M.L., Sisson, T.W., Bleick, H.A., Henton, S.M., Nye, C.J., Payne, A.L., Cameron, C.E., Larsen, J.F., Wallace, K.L., and Bull, K.F., 2013, Andesites of the 2009 eruption of Redoubt Volcano, Alaska: Journal of Volcanology and Geothermal Research, v. 259, p. 349-372, doi:10.1016/j.jvolgeores.2012.01.002
Wallace, K.L., Schaefer, J.R., and Coombs, M.L., 2013, Character, mass, distribution, and origin of tephra-fall deposits from the 2009 eruption of Redoubt Volcano, Alaska - Highlighting the significance of particle aggregation: Journal of Volcanology and Geothermal Research, v. 259, p. 145-169, doi:10.1016/j.jvolgeores.2012.09.015
Zander, P.D., Kaufman, D.S., Kuehn, S.C., Wallace, K.L., and Anderson, R.S., 2013, Early and late Holocene glacial fluctuations and tephrostratigraphy, Cabin Lake, Alaska: Journal of Quaternary Science, v. 28, n. 8, p. 761-771, doi:10.1002/jqs.2671 .
Mastin, L.G., Schwaiger, Hans, Schneider, D.J., Wallace, K.L., Schaefer, Janet, and Denlinger, R.P., 2013, Injection, transport, and deposition of tephra during event 5 at Redoubt Volcano, 23 March, 2009: Journal of Volcanology and Geothermal Research, v. 259, p. 201-213, doi:10.1016/j.jvolgeores.2012.04.025
Schaefer, J.R., and Wallace, K.L., 2012, Ash fall contour map of the 2009 eruption of Redoubt Volcano, Alaska: Digital shapefiles of contours and sample locations: Alaska Division of Geological and Geophysical Surveys Miscellaneous Publication 143, 1 DVD. Available free online at http://www.dggs.alaska.gov/pubs/id/23463 .
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.
Schiff, C.J., Kaufman, D.S., Wallace, K.L., and Ketterer, M.E., 2010, An improved proximal tephrochronology of Redoubt Volcano, Alaska: Journal of Volcanology and Geothermal Research, v. 193, no. 3/4, p. 203-214, doi: 10.1016/j.jvolgeores.2010.03.015 .
Guffanti, Marianne, Schneider, D.J., Wallace, K.L., Hall, Tony, Bensimon, D.R., and Salinas, L.J., 2010, Aviation response to a widely dispersed volcanic ash and gas cloud from the August 2008 eruption of Kasatochi, Alaska, USA: Journal of Geophysical Research, v. 115, n. D00L19, 9 p., doi:10.1029/2010JD013868 .
Adleman, J.N., Cameron, C.E., Snedigar, S.F., Neal, C.A., and Wallace, K.L., 2010, Public outreach and communications of the Alaska Volcano Observatory during the 2005-2006 eruption of Augustine Volcano, chapter 27 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. 631-644 [http://pubs.usgs.gov/pp/1769/chapters/p1769_chapter27.pdf].
Wallace, K.L., Neal, C.A., and McGimsey, R.G., 2010, Timing, distribution, and character of tephra fall from the 2005-2006 eruption of Augustine Volcano, chapter 9 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. 187-217 and spreadsheet [http://pubs.usgs.gov/pp/1769/chapters/p1769_chapter09].
Schiff, C.J., Kaufman, D.S., Wallace, K.L., Werner, A., Ku, T.L., and Brown, T.A., 2008, Modeled tephra ages from lake sediments, base of Redoubt Volcano, Alaska: Quaternary Geochronology, v. 3, p. 56-67.
Schaefer, J.R., Wallace, K.L., and Kassel, C.M., 2008, Preliminary bathymetric map of Mother Goose Lake, Alaska Peninsula: Alaska Division of Geological & Geophysical Surveys Raw Data File 2008-3, 1 disc, available at http://www.dggs.dnr.state.ak.us/pubs/id/16301 .
Waythomas, Christopher, Miller, T.P., Welch, Brian, Calvert, A.T., Bacon, C.R., and Wallace, K.L., 2007, Volcano-glacier interactions at Mount Veniaminof, a large ice-filled caldera on the Alaska Peninsula [abs.]: Abstracts with Programs - Geological Society of America, v. 39, n. 4, p. 20.
Adleman, J.N., Snedigar, S., and Wallace, K., 2006, Alaska Volcano Observatory: outreach, education, and communication, one eruption at a time [abs.]: Geological Society of Americal Abstracts with Program, v. 38, n. 7, p. 516, available on the World Wide Web at http://gsa.confex.com/gsa/2006AM/finalprogram/abstract_113524.htm
Neal, C., Wallace, K., Albanese, S., Fish, A., and Cahill, C., 2006, Communicating ash-fall hazard to the public during eruptions: a proposed scheme to streamline ash-fall warning messages in the U.S. based on the recent activity at Augustine Volcano, Alaska [abs.]: Eos, Joint Assembly Supplement, v. 87, abstract V33B-0659.
Schiff, C.J., Kaufman, D.S., and Wallace, K.L., 2006, Holocene tephrochronology from lake sediments, Redoubt Volcano, Alaska [abs.]: Eos, Joint Assembly Supplement, v. 87, abstract V33B-0660.
Cahill, C.F., Cahill, T.A., Webley, P., Wallace, K.L., Dean, K.G., and Dehn, J., 2006, Size- and time-resolved composition of volcanic ash from Augustine Volcano, Alaska [abs.]: Eos, Joint Assembly Supplement, v. 87, abstract V22B-05.
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.
Izbekov, Pavel, Wallace, Kristi, Larsen, Jessica, Nye, Chris, and Eichelberger, John, 2006, Variations of glass composition at the start of the 2006 eruption, Augustine volcano, Alaska [abs.]: Geological Society of America - Abstracts with Programs, v. 38, n. 5, p. 76-77.
Bowes, M.J., Heiser, P.A., Beget, James, and Wallace, Kristi, 2005, Preliminary results for interbasin correlation of tephra deposits in Lake Clark National Park, Alaska [abs.]: Abstracts with Programs - Geological Society of America, v. 37, n. 7, p. 38.
McGimsey, R., Neal, C., Waythomas, C., Wessels, R., Coombs, M., Wallace, K., 2004, Headless debris flows from Mount Spurr Volcano, Alaska [abs.]: Transactions, American Geophysical Union, v. 85, n. 47, Abstract V43B-1430.
Wallace, K. L., 2003, Characterization and discrimination of Holocene tephra-fall deposits, Mount Spurr volcano, Alaska: Northern Arizona University unpublished M.S. thesis, 169 p.
Waythomas, C. F., and Wallace, K. L., 2002, Flank collapse at Mount Wrangell, Alaska, recorded by volcanic mass-flow deposits in the Copper River lowland: Canadian Journal of Earth Sciences, v. 39, n. 8, p. 1257-1279.
Waythomas, C. F., Miller, T. P., Mangan, M. T., Trusdell, F. A., and Wallace, K. L., 2000, Fire and ice on the Alaska Peninsula stratigraphic records of pyroclastic eruptions and glaciation, Emmons Lake Caldera and vicinity, Southwestern Alaska [abs.]: Eos, v. 81, n. 48, p. 1352-1353.
Wallace, K. L., and Waythomas, C. F., 2000, Further investigation of geologic setting and characterization of a large volcanic debris avalanche deposit in the Copper River basin, Alaska [abs.]: Eos, v. 81, n. 48, p. 1353.
Wallace, K. L., McGimsey, R. G., and Miller, T. P., 2000, Historically active volcanoes in Alaska, a quick reference: U.S. Geological Survey Fact Sheet FS 0118-00, 2 p.
McGimsey, R. G., and Wallace, K. L., 1999, 1997 volcanic activity in Alaska and Kamchatka: Summary of events and response of the Alaska Volcano Observatory: U.S. Geological Survey Open-File Report 99-0448, 42 p.