Tim R. Orr
Physical volcanology and eruption dynamics of basaltic volcanoes, principally Kīlauea volcano, Hawaii, and the Bering Sea Basalt Province, Alaska. Eruptive histories and hazards of Hawaiian and Alaska volcanoes.
My position as a Research Geologist at the Alaska Volcano Observatory focuses on fundamental research on eruption and flow field processes to understand hazards better and improve forecasts, first in Hawaiʻi and now in Alaska. My work entails observing and measuring eruptive activity as part of operational monitoring and through directed field studies to analyze the data collected to gain fundamental insights into eruptive phenomena in Hawaiʻi, Alaska, and worldwide.
In addition, a fundamental part of my position is the monitoring of, and response to, volcanic unrest and eruptions. I serve as a 24/7 on-call duty scientist and duty remote sensor at AVO periodically throughout the year, and more often as needed during eruption crises, with primary responsibility for assessing volcanic activity daily and issuing hazard alerts. Because of my previous experience at the Hawaiian Volcano Observatory, I am also called upon to help with eruption response efforts in Hawaiʻi, when needed.
Professional Experience
Research Geologist, USGS Alaska Volcano Observatory, June 2017–Present
Research Geologist, USGS Hawaiian Volcano Observatory, May 2016–June 2017
Operational Geologist, USGS Hawaiian Volcano Observatory, June 2005–May 2016
Physical Science Technician, University of Hawaiʻi at Hilo, November 2002–June 2005
Education and Certifications
University of Hawaii at Manoa, PH.D. (2015) – Geology and Geophysics
Northern Arizona University, M.S. (1997) – Geology
University of Montana, B.A. (1995) – Geology
University of Montana, B.A. (1993) – Geography
Affiliations and Memberships*
American Geophysical Union
Geological Society of America
International Association of Volcanology and Chemistry of the Earth’s Interior
Science and Products
Hydrothermal hexahydrite spherules erupted during the 2008-2010 summit eruption of Kīlauea Volcano, Hawai`i' Hydrothermal hexahydrite spherules erupted during the 2008-2010 summit eruption of Kīlauea Volcano, Hawai`i'
Shallow degassing events as a trigger for very-long-period seismicity at Kīlauea Volcano, Hawai‘i Shallow degassing events as a trigger for very-long-period seismicity at Kīlauea Volcano, Hawai‘i
Geodetic evidence for en echelon dike emplacement and concurrent slow slip during the June 2007 intrusion and eruption at Kilauea volcano, Hawaii Geodetic evidence for en echelon dike emplacement and concurrent slow slip during the June 2007 intrusion and eruption at Kilauea volcano, Hawaii
Buckets of ash track tephra flux from Halema'uma'u Crater, Hawai'i Buckets of ash track tephra flux from Halema'uma'u Crater, Hawai'i
Catalog of Tephra samples from Kilauea's summit eruption, March-December 2008 Catalog of Tephra samples from Kilauea's summit eruption, March-December 2008
Hawaiian Volcano Observatory Hawaiian Volcano Observatory
Remote-controlled pan, tilt, zoom cameras at Kilauea and Mauna Loa Volcanoes, Hawai'i Remote-controlled pan, tilt, zoom cameras at Kilauea and Mauna Loa Volcanoes, Hawai'i
A Versatile Time-Lapse Camera System Developed by the Hawaiian Volcano Observatory for Use at Kilauea Volcano, Hawaii A Versatile Time-Lapse Camera System Developed by the Hawaiian Volcano Observatory for Use at Kilauea Volcano, Hawaii
New episodes of volcanism at Kilauea Volcano, Hawaii New episodes of volcanism at Kilauea Volcano, Hawaii
Hawaiian volcano observatory summary 103; Part I, seismic data, January to December 2003 Hawaiian volcano observatory summary 103; Part I, seismic data, January to December 2003
Science and Products
Hydrothermal hexahydrite spherules erupted during the 2008-2010 summit eruption of Kīlauea Volcano, Hawai`i' Hydrothermal hexahydrite spherules erupted during the 2008-2010 summit eruption of Kīlauea Volcano, Hawai`i'
Shallow degassing events as a trigger for very-long-period seismicity at Kīlauea Volcano, Hawai‘i Shallow degassing events as a trigger for very-long-period seismicity at Kīlauea Volcano, Hawai‘i
Geodetic evidence for en echelon dike emplacement and concurrent slow slip during the June 2007 intrusion and eruption at Kilauea volcano, Hawaii Geodetic evidence for en echelon dike emplacement and concurrent slow slip during the June 2007 intrusion and eruption at Kilauea volcano, Hawaii
Buckets of ash track tephra flux from Halema'uma'u Crater, Hawai'i Buckets of ash track tephra flux from Halema'uma'u Crater, Hawai'i
Catalog of Tephra samples from Kilauea's summit eruption, March-December 2008 Catalog of Tephra samples from Kilauea's summit eruption, March-December 2008
Hawaiian Volcano Observatory Hawaiian Volcano Observatory
Remote-controlled pan, tilt, zoom cameras at Kilauea and Mauna Loa Volcanoes, Hawai'i Remote-controlled pan, tilt, zoom cameras at Kilauea and Mauna Loa Volcanoes, Hawai'i
A Versatile Time-Lapse Camera System Developed by the Hawaiian Volcano Observatory for Use at Kilauea Volcano, Hawaii A Versatile Time-Lapse Camera System Developed by the Hawaiian Volcano Observatory for Use at Kilauea Volcano, Hawaii
New episodes of volcanism at Kilauea Volcano, Hawaii New episodes of volcanism at Kilauea Volcano, Hawaii
Hawaiian volcano observatory summary 103; Part I, seismic data, January to December 2003 Hawaiian volcano observatory summary 103; Part I, seismic data, January to December 2003
*Disclaimer: Listing outside positions with professional scientific organizations on this Staff Profile are for informational purposes only and do not constitute an endorsement of those professional scientific organizations or their activities by the USGS, Department of the Interior, or U.S. Government