Moshrefzadeh, J., Izbekov, P., Loewen, M., Larsen, J., and Regan, S., 2023, Dating individual zones in phenocrysts from the 2016–2017 eruption of Bogoslof volcano provides constraints on timescales of magmatic processes: Journal of Volcanology and Geothermal Research v. 435, article no. 107741, 16 p. https://doi.org/10.1016/j.jvolgeores.2022.107741.
http://dx.doi.org/10.1016/j.jvolgeores.2022.107741

Larsen, J.F., Schaefer, J.R., and Cameron, C.E., 2022, Electron probe microanalytical data of minerals and glass from rock samples from Okmok volcano, Alaska: Alaska Division of Geological & Geophysical Surveys Raw Data File 2022-6, 13 p. https://doi.org/10.14509/30853.
http://dx.doi.org/10.14509/30853
publication on DGGS website

Larsen, J.F., Schaefer, J.R., Cameron, C.E., and Montayne, Simone, 2022, Electron probe microanalytical data of minerals and glass from rock samples from Pavlof Volcano, Alaska: Alaska Division of Geological & Geophysical Surveys Raw Data File 2022-7, 18 p. https://doi.org/10.14509/30854.
http://dx.doi.org/10.14509/30854
DGGS Publication page

Kasatkina, E., Koulakov, I., Grapenthin, R., Izbekov, P., Larsen, J. F., Al Arifi, N., and Saleh Ismail Qaysi, 2022, Multiple magma sources beneath the Okmok caldera as inferred from local earthquake tomography: Journal of Geophysical Research: Solid Earth, v. 127. doi.org/10.1029/2022JB024656.
http://dx.doi.org/10.1029/2022JB024656
Full Text PDF : 11.1 mb

Larsen, J.F., Waythomas, C.F., Mulliken, K.M., Izbekov, Pavel, and Cameron, C.E., 2021, Major-element oxide, trace element, and glass compositional analyses from Holocene to historical eruptions from Pavlof Volcano, Alaska: Alaska Division of Geological & Geophysical Surveys Preliminary Interpretive Report 2021-1, 20 p., https://doi.org/10.14509/30580.
http://dx.doi.org/10.14509/30580
DGGS website with publication download

Schaefer, J.R.G., Perreault, J.M., Larsen, J.F., and Vallance, J.W., 2020, Makushin Volcano ash hazards: Alaska Division of Geological & Geophysical Surveys Information Circular 86, 2 p., http://doi.org/10.14509/30411.
http://dx.doi.org/10.14509/30411
reference on DGGS website

De Angelis, S.H., Larsen, J.F., Coombs, M.L., Utley, J.E.P., and Dunn, Andrew, 2020, Phase equlibrium of a high-SiO2 andesite at fO2=RRO: implications for Augustine Volcano and other high-fO2 arc andesites: Contributions to Mineralogy and Petrology, v. 175, n. 24, 21 p., doi: https://doi.org/10.1007/s00410-020-1663-6.
http://dx.doi.org/10.1007/s00410-020-1663-6

Larsen, J.F., Neal, C.A., and Cameron, C.E., 2020, Major-oxide and trace-element geochemical data from rocks collected on Little Sitkin Island, from Little Sitkin Volcano, Alaska: Alaska Division of Geological & Geophysical Surveys Raw Data File 2020-4, 4 p. http://doi.org/10.14509/30440
http://dx.doi.org/10.14509/30440
link to publication on DGGS website

McConnell, J.R., Sigl, Michael, Plunkett, Gil, Burke, Andrea, Kim, W.M., Raible, C.C., Wilson, A.I., Manning, J.G., Ludlow, Francis, Chellman, N.J., Innes, H.M., Yang, Zhen, Larsen, J.F., Schaefer, J.R., Kipfstuhl, Sepp, Mojtabavi, Seyedhamidreza, Wilhelms, Frank, Opel, Thomas, Meyer, Hanno, and Steffensen, J.P., 2020, Extreme climate after massive eruption of Alaska's Okmok volcano in 43 BCE and effects on the late Roman Republic and Ptolemaic Kingdom: Proceedings of the National Academy of Science of the United States of America, 7 p., www.pnas.org/cgi/doi/10.1073/pnas.2002722117.
http://dx.doi.org/10.1073/pnas.2002722117
article on PNAS website

Larsen, J.F., Schaefer, Janet, Vallance, J.W., and Neill, O.K., 2020, Petrology and geochemistry of three Early Holocene eruptions from Makushin Volcano, Alaska: Bulletin of Volcanology, v. 82, n. 72, 17 p., doi:10.1007/s00445-020-01412-5.
http://dx.doi.org/10.1007/s00445-020-01412-5

De Angelis, S.H., Larsen, J.F., Coombs, M.L., Utley, J.E.P., and Dunn, Andrew, 2020, Phase equilibrium of a high SiO2 andesite at fO2=RRO - Implications for Augustine Volcano and other high fO2 arc andesites: Contributions to Mineralogy and Petrology, v. 175, no. 24, 20 p., https://doi.org/10.1007/s00410-020-1663-6.
http://dx.doi.org/10.1007/s00410-020-1663-6

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.
http://dx.doi.org/10.1007/s00445-019-1352-3

Loewen, M.L., Izbekov, Pavel, Moshrefzadeh, Jamshid, Coombs, Michelle, Larsen, Jessica, Graham, Nathan, 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.
http://dx.doi.org/10.1007/s00445-019-1333-6

Coombs, M.L., Larsen, J.F., and Neal, C.A., 2018, Postglacial eruptive history and geochemistry of Semisopochnoi volcano, western Aleutian Islands, Alaska: U.S. Geological Survey Scientific Investigations Report 2017-5150, 32 p., https://doi.org/10.3133/sir20175150.
http://dx.doi.org/https://doi.org/10.3133/sir20175150
full text PDF on USGS website

Unema, J.A., Ort, M.H., Larsen, J.F., Neal, C.A., and Schaefer, J.R., 2016, Water-magma interaction and plume processes in the 2008 Okmok eruption, Alaska: GSA Bulletin, 15 p., doi:10.1130/B31360.1
http://dx.doi.org/10.1130/B31360.1

Larsen, J.F., Neal, C.A., Schaefer, J.R., Kaufman, A.M., and Lu, Zhong, 2015, The 2008 phreatomagmatic eruption of Okmok Volcano, Aleutian Islands, Alaska: Chronology, deposits, and landform changes: Alaska Division of Geological & Geophysical Surveys Report of Investigation 2015-2, 53 p. doi:10.14509/29405
http://dx.doi.org/10.14509/29405
link to PDF on DGGS website

Neill, O.K., Larsen, J.F., Izbekov, P.E., and Nye, C.J., 2015, Pre-eruptive magma mixing and crystal transfer revealed by phenocryst and microlite compositions in basaltic andesite from the 2008 eruption of Kasatochi Island volcano: American Mineralogist, v. 100, n. 4, p. 722-737, doi: 10.2138/am-2015-4967
http://dx.doi.org/10.2138/am-2015-4967

De Angelis, S.H., Larsen, J., Coombs, M., Dunn, A., and Hayden, L., 2015, Amphibole reaction rims as a record of pre-eruptive magmatic heating: an experimental approach: Earth and Planetary Science Letters, v. 426, p. 235-245, doi:10.1016/j.epsl.2015.06.051
http://dx.doi.org/10.1016/j.epsl.2015.06.051

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
http://dx.doi.org/10.1016/j.jvolgeores.2012.01.002

Larsen, J.F., Sliwinski, M.G., Nye, Christopher, Cameron, Cheryl, and Schaefer, J.R., 2013, The 2008 eruption of Okmok Volcano, Alaska: Petrological and geochemical constraints on the subsurface magma plumbing system: Journal of Volcanology and Geothermal Research, v. 264, p. 85-106, doi:10.1016/j.jvolgeores.2013.07.003 .
http://dx.doi.org/10.1016/j.jvolgeores.2013.07.003

De Angelis, S.H., Larsen, Jessica, and Coombs, Michelle, 2013, Pre-eruptive magmatic conditions at Augustine Volcano, Alaska, 2006: evidence from amphibole geochemistry and textures: Journal of Petrology, v. 54, n. 9, p. 1939-1961, doi:10.1093/petrology/egt037
http://dx.doi.org/10.1093/petrology/egt037

Rader, E.L., and Larsen, J.F., 2013, Experimental phase relations of a low MgO Aleutian basaltic andesite at XH2O-0.7-1: Contributions to Mineralogy and Petrology, v. 166, n. 6, p. 1593-1611, http://dx.doi.org/10.1007/s00410-013-0944-8
http://dx.doi.org/10.1007/s00410-013-0944-8

Schaefer, J.R., Larsen, J.F., and Unema, J.A., 2011, Digital elevation model (DEM) and shaded relief image of Okmok Caldera, 2010: Alaska Division of Geological & Geophysical Surveys Raw Data File 2011-6, 1 DVD, available online at http://www.dggs.dnr.state.ak.us/pubs/id/23223 .
link to ADGGS website with GIS files for download

Wong, L.J., and Larsen, J.F., 2010, The Middle Scoria sequence: A Holocene violent strombolian, subplinian, and phreatomagmatic eruption of Okmok volcano, Alaska: Bulletin of Volcanology, v. 72, p. 17-31.

Larsen, J.F., Nye, C.J., Coombs, M.L., Tilman, Mariah, Izbekov, Pavel, and Cameron, Cheryl, 2010, Petrology and geochemistry of the 2006 eruption of Augustine Volcano, chapter 15 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. 335-382 and spreadsheets [http://pubs.usgs.gov/pp/1769/chapters/p1769_chapter15].
chapter PDF and spreadsheets on USGS website

Zimmer, M.M., Plank, Terry, Hauri, E.H., Yogodzinski, G.M., Stelling, Peter, Larsen, Jessica, Singer, Brad, Jicha, Brian, Mandeville, Charles, and Nye, C.J., 2010, The role of water in generating the calc-alkaline trend: new volatile data for Aleutian magmas and a new tholeiitic index: Journal of Petrology, v. 5, n. 12, p. 2411, 2444, doi:10.1093/petrology/egq062 .
http://dx.doi.org/10.1093/petrology/egq062

Neal, C.A., Larsen, J.F., and Schaefer, Janet, 2009, The July-August 2008 hydrovolcanic eruption of Okmok Volcano, Umnak Island, Alaska: Alaska Geological Society Newsletter, v. 39, n. 5, p. 1-3.

Larsen, J., Neal, C., Webley, P., Freymueller, J., Haney, M., McNutt, S., Schneider, D., Prejean, S., Schaefer, J., and Wessels, R., 2009, Eruption of Alaska volcano breaks historic pattern: Eos, Transactions, American Geophysical Union, v. 90, n. 20, p. 173-174.

Zimmer, M.M., Plank, Terry, Hauri, E.H., Larsen, J.F., and Nye, C.J., 2009, Deciphering the role of H2O and fO2 during calc-alkaline differentiation [abs.]: in Abstracts of the 19th annual V.M. Goldschmidt conference, Geochimica et Cosmochimica Acta, v. 73, n. 13S, p. A1535.

Mongrain, J., Larsen, J.F., and King, P.L., 2008, Rapid water exsolution, degassing, and bubble collapse observed experimentally in K-phonolite melts: Journal of Volcanology and Geothermal Research, v. 173, n. 3-4, p. 178-184.

Larsen, J.F., 2008, Heterogeneous bubble nucleation and disequilibrium H2O exsolution in Vesuvius K-phonolite melts: Journal of Volcanology and Geothermal Research, v. 175, p. 278-288, doi:10.1016/j.jvolgeores.2008.03.015 .
http://dx.doi.org/10.1016/j.jvolgeores.2008.03.015

Almberg, LD., Larsen, J.F., Eichelberger, J.C., Vogel, T.A., and Patino, LC., 2008, Comparison of eruptive and intrusive samples from Unzen Volcano, Japan: Effects of contrasting pressure-temperature-time paths: Journal of Volcanology and Geothermal Research, v. 175, p. 60-70, doi:10.1016/j.jvolgeores.2008.03.020 .
http://dx.doi.org/doi:10.1016/j.jvolgeores.2008.03.020

Finney, Benjamin, Turner, Simon, Hawkesworth, Chris, Larsen, Jessica, Nye, Chris, George, Rhiannon, Bindeman, Ilya, and Eichelberger, John, 2008, Magmatic differentiation at an island-arc caldera: Okmok Volcano, Aleutian Islands, Alaska: Journal of Petrology, doi:10.1093/petrology/egn008 .
http://dx.doi.org/10.1093/petrology/egn008

Nye, C.J., Coombs, M.L., Larsen, J., Izbekov, P., Tilman, M., and Cameron, C., 2008, Augustine Volcano: Mg, Cr, and Ni-rich: LILE, REE, and HFSE-poor [abs.]: in Abstracts of the 18th Annual V.M. Goldschmidt Conference, Geochimica et Cosmochimica Acta, v. 72, n. 12S, p. A692.

Rader, E.L., and Larsen, J., 2008, Water under-saturated phase equilibria of basaltic andesites from Westdahl Volcano, Alaska [abs.]: Eos, Transactions, American Geophysical Union, v. 89, n. 53, 1 p.

Larsen, J. F., Neal, Christina, Schaefer, Janet, Beget, Jim, and Nye, Chris, 2007, Late Pleistocene and Holocene caldera-forming eruptions of Okmok Caldera, Aleutian Islands, Alaska, in Eichelberger, John, Gordeev, Evgenii, Izbekov, Pavel, Kasahara, Minoru, and Lees, Jonathan, eds., Volcanism and Subduction: The Kamchatka Region: Geophysical Monograph 172, American Geophysical Union, p. 343-364.

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.

Larsen, J.F., 2006, Rhyodacite magma storage conditions prior to the 3430 yBP caldera-forming eruption of Aniakchak volcano, Alaska: Contributions to Mineralogy and Petrology, v. 152, n. 4, p. 523-540, doi: 10.1007/s00410-006-0121-4.
http://dx.doi.org/10.1007/s00410-006-0121-4

Szramek, Lindsay, Gardner, J.E., and Larsen, Jessica, 2006, Degassing and microlite crystallization of basaltic andesite magma erupting at Arenal Volcano, Costa Rica: Journal of Volcanology and Geothermal Research, v. 157, p. 182-201, doi:10.1016/j.jvolgeores.2006.03.039 .
http://dx.doi.org/10.1016/j.jvolgeores.2006.03.039

Larsen, J. F., 2005, Experimental study of plagioclase rim growth around anorthite seed crystals in rhyodacitic melt: American Mineralogist, v. 90, p. 417-427.

Beget, J.E., Larsen, J.F., Neal, C.A., Nye, C.J., and Schaefer, J.R., 2005, Preliminary volcano-hazard assessment for Okmok Volcano, Umnak Island, Alaska: Alaska Division of Geological & Geophysical Surveys Report of Investigation 2004-3, 32 p., 1 sheet, scale 1:150,000.
full text of report : 3.4 MB
map sheet : 53.2 MB
link to all files for this report on DGGS website

Dreher, S.T., Eichelberger, J.C., and Larsen, J.F., 2005, The petrology and geochemistry of the Aniakchak caldera-forming ignimbrite, Aleutian Arc, Alaska: Journal of Petrology, v. 46, n. 9, p. 1747-1768, doi: 10.1093/petrology/egi032.
http://dx.doi.org/10.1093/petrology/egi032

Larsen, J. F., and Gardner, J. E., 2004, Experimental study of water degassing from phonolite melts: implications for volatile oversaturation during magmatic ascent: Journal of Volcanology and Geothermal Research, v. 134, n. 1-2, p. 109-124.

Larsen, J. F., Denis, M. H., and Gardner, J. E., 2004, Experimental study of bubble coalescence in rhyolitic and phonolitic melts: Geochimica et Cosmochimica Acta, v. 68, p. 333-344.

Coombs, M. L., Browne, B. L., and Larsen, J. F., 2004, Preliminary geology of the Tanaga Island volcanic cluster, western Aleutians (Alaska) [abs.]: Eos, AGU Fall Meeting Supplement, v. 85, n. 47, p. V43E-1457.

Browne, B. L., Coombs, M. L., and Larsen, J. F., 2004, Preliminary geology of Gareloi Volcano, western Aleutian Islands (Alaska) [abs.]: Eos, AGU Fall Meeting Supplement, v. 85, n. 47, p. V43E-1454.

Adleman, J.N., Larsen, J.F., Ramsey, M.S., McGimsey, R.G., and Neal, C.A., 2004, Analysis of composition and chronology of dome emplacement at Black Peak, Alaska utilizing ASTER remote sensing data and field-based studies [abs.]: in Abstract Volume, IAVCEI General Assembly, November 2004, Pucon, Chile, s08c_pf_165.
full-text PDF : 60 KB

Adleman, J.N., Larsen, J.F., Ramsey, M.S., McGimsey, R.G., and Neal, C.A., 2004, Analysis of composition and chronology of dome emplacement at Black Peak, Alaska utilizing ASTER remote sensing data and field-based studies [abs.]: in Abstract Volume, IV International Biennial Workshop on Subduction Processes emphasizing the Japan-Kurile-Aleutain Arcs, August 2004, unpaged.
full-text PDF : 16 KB

Larsen, J. F., Knittle, E., and Williams, Q., 2003, Constraints on the speciation of hydrogen in the Earth’s transition zone: Physics of Earth and Planetary Interiors, v. 136, p. 93-105.

Browne, B. L, Gardner, J. E., and Larsen, J. F., 2003, Amphibole reaction rims in response to decompression compared to heating: An experimental approach: Eos, AGU Fall Meeting Supplement, v. 84, n. 46, p. V12A-0551.

Adleman, J.N., Larsen, J.F., Ramsey, M.S., McGimsey, R.G., and Neal, C.A., 2003, Analysis of composition and chronology of dome emplacement at Black Peak, Alaska utilizing ASTER remote sensing data and field-based studies [abs.]: in Fall meeting supplementary, Eos, v. 84, n. 46, Abstract V31G-07.
website with full text

McGimsey, R.G., Neal, C.A., Adleman, J.N., Larsen, J.F., and Ramsey, M.S., 2003, Black Peak caldera, Alaska: Preliminary investigations of the ~4600 BP caldera-forming eruption and subsequent post-caldera activity [abs.]: in Fall meeting supplement, Eos, v. 84, n. 46, V42B-0342.
website with full text

Ramsey, M.S., Dehn, J., Adleman, J.N., Larsen, J.F., McGimsey, R.G., Neal, C.A., and Wessels, R., 2003, Deciphering silicic dome emplacement processes in the northern Pacific: Quantitative analyses of high resolution satellite and field-based data [abs.]: in Fall meeting supplement, Eos, v. 84, n. 46, V51F-0346.
website with full text

Larsen, J. F., 2002, Pre-eruptive dynamics of the 3400 vBP Aniakchak caldera forming eruption: a phase equilibria study [abs.]: Eos, v. 83, n. 47, p. V12C-04.

Wong, L. J., and Larsen, J. F., 2002, Intra-caldera events: a look at the hydrovolcanic deposit stratigraphically located between two caldera-forming eruptions of Okmok Volcano, Umnak Island, Alaska [abs.]: Eos, v. 83, n. 47, p. V11A-1378.

Larsen, J. F., Nye, C. J., and Ray, L. A., 2000, The 2050 BP Okmok Caldera forming event: evidence for magma mixing as an eruption trigger [abs.]: Eos, v. 81, n. 48, p. 1376.

Larsen, J. F., and Gardner, J., 2000, Experimental constraints on bubble interactions in rhyolite melts: implications for vesicle size distributions: Earth and Planetary Science Letters, v. 180, p. 201-214.

Burgisser, Alain, Larsen, J. F., Hazlett, R. W., Coombs, Michelle, Campbell, Matthew, and Eichelberger, John, 1999, Preliminary investigation of the eruptive cycles of Okmok Volcano, Alaska [abs.]: Eos, v. 80, n. 46, p. 1188.

Dreher, S., Coombs, M., Larsen, J., and Eichelberger, J., 1999, The stratigraphy and petrology of the 3400 BP caldera-forming eruption of Aniakchak Volcano, Alaska [abs.]: Transactions, American Geophysical Union, v. 80, n. 17, p. S353.