John A. Power (Former Employee)
Science and Products
Reports of Hearing and Not Hearing the 1992 eruption of Mount Spurr Reports of Hearing and Not Hearing the 1992 eruption of Mount Spurr
Observations of locations where the August 18th, 1992 eruption of Mount Spurr was heard and not heard around Alaska.
Interferometric synthetic aperture radar (InSAR) and its applications to study volcanoes, part 2: InSAR imaging of Alaskan Volcanoes Interferometric synthetic aperture radar (InSAR) and its applications to study volcanoes, part 2: InSAR imaging of Alaskan Volcanoes
Interferometric synthetic aperture radar (InSAR) is a remote sensing technique which can measure ground surface deformation with sub-centimeter precision and spatial resolution in tens-of-meters over a large region. This paper summarizes our recent InSAR studies of Alaskan volcanoes, associated with both eruptive and non-eruptive activity. It shows that InSAR can improve our...
Filter Total Items: 88
Mount Spurr volcano, August 18, 1992: The eruption heard around Alaska Mount Spurr volcano, August 18, 1992: The eruption heard around Alaska
The August 18, 1992, eruption of Mount Spurr volcano, Alaska, produced an impressive Vulcanian to Subplinian eruption column reaching up to 40 km above sea level that blanketed the nearby city of Anchorage with ash. At the time of the eruption, the Alaska Volcano Observatory received reports of audible sound hundreds of kilometers from the source from a variety of azimuths from the...
Authors
Alexandra M. Iezzi, John Power
Event classification, seismicity, and eruption forecasting at Great Sitkin Volcano, Alaska: 1999–2023 Event classification, seismicity, and eruption forecasting at Great Sitkin Volcano, Alaska: 1999–2023
The frequency content of volcanogenic seismicity is often used to classify events and their spatial and temporal progression is then used to map subsurface volcanic processes. The progression of volcano-seismic events and associated source processes also plays a critical role in eruption forecasting. Here we develop and evaluate a computerized methodology for characterizing volcano...
Authors
John Power, Diana Roman
From field station to forecast: Managing data at the Alaska Volcano Observatory From field station to forecast: Managing data at the Alaska Volcano Observatory
The Alaska Volcano Observatory (AVO) uses multidisciplinary data to monitor and study dozens of active and potentially active volcanoes. Here, we provide an overview of internally and externally generated data types, tools and resources used in their management, and challenges faced. Data sources include the following: (1) a multiparameter (seismic, infrasound, GNSS, web cameras) ground...
Authors
Michelle L. Coombs, Cheryl Cameron, Hannah R. Dietterich, Eleanor Boyce, Aaron Wech, Ronni Grapenthin, Kristi L. Wallace, Thomas Parker, Taryn Lopez, Scott Crass, David Fee, Matthew M. Haney, Dane M. Ketner, Matthew W. Loewen, John J. Lyons, Jenny Sha Nakai, John Power, Steven M Botnick, Israel Brewster, Max L. Enders, Dain Harmon, Peter J. Kelly, Michael J. Randall
2020 Volcanic activity in Alaska—Summary of events and response of the Alaska Volcano Observatory 2020 Volcanic activity in Alaska—Summary of events and response of the Alaska Volcano Observatory
The Alaska Volcano Observatory responded to eruptions, volcanic unrest or suspected unrest, increased seismicity, and other significant activity at nine volcanic centers in Alaska in 2020. The most notable volcanic activity in 2020 was an eruption of Shishaldin Volcano, which produced lava flows, lahars, and ash. Mount Cleveland had one small ash-producing eruption in June but was quiet...
Authors
Tim R. Orr, Cheryl Cameron, Hannah R. Dietterich, Matthew W. Loewen, Taryn Lopez, John J. Lyons, Jenny Nakai, John A. Power, Cheryl Searcy, Gabrielle Tepp, Christopher F. Waythomas
2021 Volcanic activity in Alaska and the Commonwealth of the Northern Mariana Islands—Summary of events and response of the Alaska Volcano Observatory 2021 Volcanic activity in Alaska and the Commonwealth of the Northern Mariana Islands—Summary of events and response of the Alaska Volcano Observatory
In 2021, the Alaska Volcano Observatory responded to eruptions, volcanic unrest or suspected unrest, increased seismicity, and other significant activity at 15 volcanic centers in Alaska and the Commonwealth of the Northern Mariana Islands. Eruptive activity in Alaska consisted of repeated small, ash-producing, phreatomagmatic explosions from Mount Young on Semisopochnoi Island; an...
Authors
Tim R. Orr, Hannah R. Dietterich, David Fee, Tarsilo Girona, Ronni Grapenthin, Matthew M. Haney, Matthew W. Loewen, John J. Lyons, John A. Power, Hans F. Schwaiger, David J. Schneider, Darren Tan, Liam Toney, Valerie K. Wasser, Christopher F. Waythomas
Analysis of the Alaska Volcano Observatory’s response time to volcanic explosions-1989 to 2016 Analysis of the Alaska Volcano Observatory’s response time to volcanic explosions-1989 to 2016
A major goal of volcano monitoring is the rapid identification of volcanic explosions and subsequent warning of associated hazards. Between 1988 and 2016 the Alaska Volcano Observatory (AVO) responded to at least 54 separate volcanic eruptions. During this period, AVO's monitoring program relied principally on seismic and satellite remote sensing data, supplemented with geodetic, gas...
Authors
John Power, Cheryl E. Cameron
Science and Products
Reports of Hearing and Not Hearing the 1992 eruption of Mount Spurr Reports of Hearing and Not Hearing the 1992 eruption of Mount Spurr
Observations of locations where the August 18th, 1992 eruption of Mount Spurr was heard and not heard around Alaska.
Interferometric synthetic aperture radar (InSAR) and its applications to study volcanoes, part 2: InSAR imaging of Alaskan Volcanoes Interferometric synthetic aperture radar (InSAR) and its applications to study volcanoes, part 2: InSAR imaging of Alaskan Volcanoes
Interferometric synthetic aperture radar (InSAR) is a remote sensing technique which can measure ground surface deformation with sub-centimeter precision and spatial resolution in tens-of-meters over a large region. This paper summarizes our recent InSAR studies of Alaskan volcanoes, associated with both eruptive and non-eruptive activity. It shows that InSAR can improve our...
Filter Total Items: 88
Mount Spurr volcano, August 18, 1992: The eruption heard around Alaska Mount Spurr volcano, August 18, 1992: The eruption heard around Alaska
The August 18, 1992, eruption of Mount Spurr volcano, Alaska, produced an impressive Vulcanian to Subplinian eruption column reaching up to 40 km above sea level that blanketed the nearby city of Anchorage with ash. At the time of the eruption, the Alaska Volcano Observatory received reports of audible sound hundreds of kilometers from the source from a variety of azimuths from the...
Authors
Alexandra M. Iezzi, John Power
Event classification, seismicity, and eruption forecasting at Great Sitkin Volcano, Alaska: 1999–2023 Event classification, seismicity, and eruption forecasting at Great Sitkin Volcano, Alaska: 1999–2023
The frequency content of volcanogenic seismicity is often used to classify events and their spatial and temporal progression is then used to map subsurface volcanic processes. The progression of volcano-seismic events and associated source processes also plays a critical role in eruption forecasting. Here we develop and evaluate a computerized methodology for characterizing volcano...
Authors
John Power, Diana Roman
From field station to forecast: Managing data at the Alaska Volcano Observatory From field station to forecast: Managing data at the Alaska Volcano Observatory
The Alaska Volcano Observatory (AVO) uses multidisciplinary data to monitor and study dozens of active and potentially active volcanoes. Here, we provide an overview of internally and externally generated data types, tools and resources used in their management, and challenges faced. Data sources include the following: (1) a multiparameter (seismic, infrasound, GNSS, web cameras) ground...
Authors
Michelle L. Coombs, Cheryl Cameron, Hannah R. Dietterich, Eleanor Boyce, Aaron Wech, Ronni Grapenthin, Kristi L. Wallace, Thomas Parker, Taryn Lopez, Scott Crass, David Fee, Matthew M. Haney, Dane M. Ketner, Matthew W. Loewen, John J. Lyons, Jenny Sha Nakai, John Power, Steven M Botnick, Israel Brewster, Max L. Enders, Dain Harmon, Peter J. Kelly, Michael J. Randall
2020 Volcanic activity in Alaska—Summary of events and response of the Alaska Volcano Observatory 2020 Volcanic activity in Alaska—Summary of events and response of the Alaska Volcano Observatory
The Alaska Volcano Observatory responded to eruptions, volcanic unrest or suspected unrest, increased seismicity, and other significant activity at nine volcanic centers in Alaska in 2020. The most notable volcanic activity in 2020 was an eruption of Shishaldin Volcano, which produced lava flows, lahars, and ash. Mount Cleveland had one small ash-producing eruption in June but was quiet...
Authors
Tim R. Orr, Cheryl Cameron, Hannah R. Dietterich, Matthew W. Loewen, Taryn Lopez, John J. Lyons, Jenny Nakai, John A. Power, Cheryl Searcy, Gabrielle Tepp, Christopher F. Waythomas
2021 Volcanic activity in Alaska and the Commonwealth of the Northern Mariana Islands—Summary of events and response of the Alaska Volcano Observatory 2021 Volcanic activity in Alaska and the Commonwealth of the Northern Mariana Islands—Summary of events and response of the Alaska Volcano Observatory
In 2021, the Alaska Volcano Observatory responded to eruptions, volcanic unrest or suspected unrest, increased seismicity, and other significant activity at 15 volcanic centers in Alaska and the Commonwealth of the Northern Mariana Islands. Eruptive activity in Alaska consisted of repeated small, ash-producing, phreatomagmatic explosions from Mount Young on Semisopochnoi Island; an...
Authors
Tim R. Orr, Hannah R. Dietterich, David Fee, Tarsilo Girona, Ronni Grapenthin, Matthew M. Haney, Matthew W. Loewen, John J. Lyons, John A. Power, Hans F. Schwaiger, David J. Schneider, Darren Tan, Liam Toney, Valerie K. Wasser, Christopher F. Waythomas
Analysis of the Alaska Volcano Observatory’s response time to volcanic explosions-1989 to 2016 Analysis of the Alaska Volcano Observatory’s response time to volcanic explosions-1989 to 2016
A major goal of volcano monitoring is the rapid identification of volcanic explosions and subsequent warning of associated hazards. Between 1988 and 2016 the Alaska Volcano Observatory (AVO) responded to at least 54 separate volcanic eruptions. During this period, AVO's monitoring program relied principally on seismic and satellite remote sensing data, supplemented with geodetic, gas...
Authors
John Power, Cheryl E. Cameron
*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