Orr, Tim
Geologic mapping and interpretation of Quaternary and recent eruptive products at active Alaskan volcanoes; hazards assessment; eruption crisis response including observation and documentation of volcanic activity, and dissemination of information to Federal, State, and local authorities as well as the media, scientific community, and the general public.
Discipline(s): Geology
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 Digital surface model and orthoimagery of Iliamna Volcano and Johnson River, Lake Clark National Park, Alaska, 2025
Hults, C.P., Hansen, D., Brady, G., Orr, T.R., and Dietterich, H.R., 2025, Digital surface model and orthoimagery of Iliamna Volcano and Johnson River, Lake Clark National Park, Alaska: U.S. Geological Survey data release. https://doi.org/10.5066/P13OCPID
Does the Lost Jim lava flow (Alaska) really preserve evidence of interaction with permafrost?, 2025
Orr, T., Coombs, W.M., Rader, E., and Larsen, J.F., 2025, Does the Lost Jim lava flow (Alaska) really preserve evidence of interaction with permafrost?: Journal of Volcanology and Geothermal Research v. 464, 108347. https://doi.org/10.1016/j.jvolgeores.2025.1083472020 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