Loewen, Matthew
Matt has worked as a Research Geologist for the U.S. Geological Survey working at the Alaska Volcano Observatory in Anchorage, AK, since 2017. His research utilizes igneous petrology, geochemistry, field mapping, stratigraphy, physical volcanology, and remote sensing techniques to study the geologic history and magmatic system of Alaska volcanoes.
Website: https://www.usgs.gov/staff-profiles/matthew-loewen
Discipline(s): Geochemistry, Geology, Petrology, Remote Sensing, Tephra
References:
2022 Volcanic activity in Alaska and the Northern Mariana Islands—Summary of events and response of the Alaska Volcano Observatory, 2025
Orr, T.R., Dietterich, H.R., Grapenthin, R., Haney, M.M., Loewen, M.W., Saunders-Schultz, P., Tan, D., Waythomas, C.F., and Wech, A.G., 2025, 2022 Volcanic activity in Alaska and the Northern Mariana Islands-Summary of events and response of the Alaska Volcano Observatory: U.S. Geological Survey Scientific Investigations Report 2024-5108, 46 p. https://doi.org/ 10.3133/sir20245108
Full-text PDF 12.8 MB Identifying precursors and tracking pulses of magma ascent in multidisciplinary data during the 2018–2023 phreatomagmatic eruption at Semisopochnoi Island, Alaska, 2025
Lyons, J.J., Tan, D., Angarita, M., Loewen, M.W., Lopez, T., Grapenthin, R., Hotovec-Ellis, A.J., Fee, D., and Haney, M.W., 2025, Identifying precursors and tracking pulses of magma ascent in multidisciplinary data during the 2018–2023 phreatomagmatic eruption at Semisopochnoi Island, Alaska: Journal of Volcanology and Geothermal Research v. 463, 108329. https://doi.org/10.1016/j.jvolgeores.2025.108329Previously unpublished whole-rock major- and trace-element compositions of volcanic samples from the Alaska Peninsula-Aleutian arc, Alaska, 2025
Coombs, M.L., Cameron, C.E., Gardner, C.A., Larsen, J.F., Fierstein, J.E., Loewen, M.W., Izbekov, P.E., and Dietterich, H.R., 2025, Previously unpublished whole-rock major- and trace-element compositions of volcanic samples from the Alaska Peninsula-Aleutian arc, Alaska: Alaska Division of Geological & Geophysical Surveys Raw Data File 2025-2, 9 p. https://doi.org/10.14509/31455
Full-text PDF 781 KB Tephra samples and analyses from the 2018-2023 eruption of Semisopochnoi Volcano, Alaska, 2025
Loewen, M.W., Dietterich, H.R., Lubbers, Jordan, and Van Eaton, A.R., 2025, Tephra samples and analyses from the 2018-2023 eruption of Semisopochnoi Volcano, Alaska: Alaska Division of Geological & Geophysical Surveys Raw Data File 2025-15, 13 p. https://doi.org/10.14509/31645
Full-text PDF 2.6 MB 
Supplementary data (zip) 88 KB 2020 volcanic activity in Alaska - Summary of events and response of the Alaska Volcano Observatory, 2024
Orr, T., Cameron, C.E., Dietterich, H.R., Loewen, M.W., Lopez, T., Lyons, J.J., Nakai, J., Power, J.A., Searcy, C., Tepp, G., and Waythomas, C.W., 2024, 2020 Volcanic activity in Alaska - Summary of events and response of the Alaska Volcano Observatory: U.S. Geological Survey Scientific Investigations Report 2024-5004, 34 p. https://doi.org/10.3133/sir20245004.
Full-text PDF 13.5 MB 2021 Volcanic activity in Alaska and the Commonwealth of the Northern Mariana Islands - Summary of events and response of the Alaska Volcano Observatory, 2024
Orr, T.R., Dietterich, H.R., Fee D., Girona, T., Grapenthin, R., Haney, M.M., Loewen, M.W., Lyons, J.J., Power, J.A., Schwaiger, H.F., Schneider, D.J., Tan, D., Toney, L., Wasser, V.K., and Waythomas, C.F., 2024, 2021 Volcanic activity in Alaska and the Commonwealth of the Northern Mariana Islands - Summary of events and response of the Alaska Volcano Observatory: U.S. Geological Survey Scientific Investigations Report 2024-5014, 64 p. https://doi.org/10.3133/sir20245014.
Full-text PDF 25.7 MB From field station to forecast: managing data at the Alaska Volcano Observatory, 2024
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/s00445-024-01766-0Source compositions of large tephra-production eruptions in Alaska, 2024
Lubbers, J., Loewen, M.W., Wallace, Kristi, and Coombs, M.L., 2024, Source compositions of large tephra-production eruptions in Alaska: Alaska Division of Geological & Geophysical Surveys Raw Data File 2023-26, 3 p. https://doi.org/10.14509/31091
Full-text PDF 301 KB Tephra samples and analyses from Cook Inlet source volcanoes and Anchor Point, Alaska, 2024
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/10.14509/31090Dating individual zones in phenocrysts from the 2016–2017 eruption of Bogoslof volcano provides constraints on timescales of magmatic processes, 2023
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.Davidof volcano samples and analyses, 2023
Loewen, M.W., Dietterich, Hannah, and Rosenkrans, H.S., 2023, Davidof volcano samples and analyses: Alaska Division of Geological & Geophysical Surveys Raw Data File 2023-22, 4 p. https://doi.org/10.14509/31084.Probabilistic source classification of large tephra producing eruptions using supervised machine learning - an example from the Alaska-Aleutian Arc, 2023
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.The 2018 eruption of Mount Veniaminof, Alaska, 2022
Waythomas, C.F., Dietterich, H.R., Tepp, G.M., Lopez, T.M., and Loewen, M.W., 2022, The 2018 eruption of Mount Veniaminof, Alaska: U.S. Geological Survey Scientific Investigations Report 2022-5075, 32 p. https://doi.org/10.3133/sir20225075.
Full Text PDF 11.9mb