Christina A. Neal (Former Employee)
Science and Products
Filter Total Items: 96
2005 volcanic activity in Alaska, Kamchatka, and the Kurile Islands: Summary of events and response of the Alaska Volcano Observatory 2005 volcanic activity in Alaska, Kamchatka, and the Kurile Islands: Summary of events and response of the Alaska Volcano Observatory
The Alaska Volcano Observatory (AVO) responded to eruptive activity or suspected volcanic activity at or near 16 volcanoes in Alaska during 2005, including the high profile precursory activity associated with the 2005–06 eruption of Augustine Volcano. AVO continues to participate in distributing information about eruptive activity on the Kamchatka Peninsula, Russia, and in the Kurile...
Authors
R. McGimsey, C.A. Neal, J. Dixon, Sergey Ushakov
Hazard information management during the autumn 2004 reawakening of Mount St. Helens volcano, Washington Hazard information management during the autumn 2004 reawakening of Mount St. Helens volcano, Washington
The 2004 reawakening of Mount St. Helens quickly caught the attention of government agencies as well as the international news media and the public. Immediate concerns focused on a repeat of the catastrophic landslide and blast event of May 18, 1980, which remains a vivid memory for many individuals. Within several days of the onset of accelerating seismicity, media inquiries increased
Authors
Carolyn Driedger, Christina A. Neal, Tom Knappenberger, Deborah Needham, Robert B. Harper, William Steele
Atmospheric contribution of gas emissions from Augustine volcano, Alaska during the 2006 eruption Atmospheric contribution of gas emissions from Augustine volcano, Alaska during the 2006 eruption
Airborne surveillance of gas emissions from Augustine for SO2, CO2 and H2S showed no evidence of anomalous degassing from 1990 through May 2005. By December 20, 2005, Augustine was degassing 660 td−1 of SO2, and ten times that by January 4, 2006. The highest SO2 emission rate measured during the 2006 eruption was 8650 td−1 (March 1); for CO2, 13000 td−1 (March 9), and H2S, 8 td−1...
Authors
K.A. McGee, M.P. Doukas, R. McGimsey, C.A. Neal, R.L. Wessels
2006 volcanic activity in Alaska, Kamchatka, and the Kurile Islands: Summary of events and response of the Alaska Volcano Observatory 2006 volcanic activity in Alaska, Kamchatka, and the Kurile Islands: Summary of events and response of the Alaska Volcano Observatory
The Alaska Volcano Observatory (AVO) responded to eruptions, possible eruptions, and volcanic unrest at or near nine separate volcanic centers in Alaska during 2006. A significant explosive eruption at Augustine Volcano in Cook Inlet marked the first eruption within several hundred kilometers of principal population centers in Alaska since 1992. Glaciated Fourpeaked Mountain, a volcano...
Authors
Christina A. Neal, Robert McGimsey, James Dixon, Alexander Manevich, Alexander Rybin
Database for the Geologic Map of the Summit Region of Kilauea Volcano, Hawaii Database for the Geologic Map of the Summit Region of Kilauea Volcano, Hawaii
INTRODUCTION The area covered by this map includes parts of four U.S. Geological Survey (USGS) 7.5' topographic quadrangles (Kilauea Crater, Volcano, Ka`u Desert, and Makaopuhi). It encompasses the summit, upper rift zones, and Koa`e Fault System of Kilauea Volcano and a part of the adjacent, southeast flank of Mauna Loa Volcano. The map is dominated by products of eruptions from Kilauea...
Authors
Dillon Dutton, David Ramsey, Peggy Bruggman, Tracey Felger, Ellen Lougee, Sandy Margriter, Patrick Showalter, Christina A. Neal, John Lockwood
Late pleistocene and holocene caldera-forming eruptions of Okmok Caldera, Aleutian Islands, Alaska Late pleistocene and holocene caldera-forming eruptions of Okmok Caldera, Aleutian Islands, Alaska
This chapter contains sections titled: Introduction Geologic setting Field and Analytical Methods Results Discussion Conclusions
Authors
Jessica F. Larsen, Christina Neal, Janet Schaefer, Jim Beget, Chris Nye
Geothermal disruption of summit glaciers at Mount Spurr Volcano, 2004-6: An unusual manifestation of volcanic unrest Geothermal disruption of summit glaciers at Mount Spurr Volcano, 2004-6: An unusual manifestation of volcanic unrest
Mount Spurr, a 3,374-m-high stratovolcano in the Cook Inlet region of Alaska, showed signs of volcanic unrest beginning in 2004 and lasting through 2006. These signs included increases in heat flow, seismicity, and gas flux, which we interpret as the results of a magmatic intrusion in mid-2004. In response, debris-laden meltwater beneath the glacier in Mount Spurr's geothermally active...
Authors
Michelle Coombs, Christina A. Neal, Rick L. Wessels, Robert McGimsey
Studies by the U.S. Geological Survey in Alaska, 2005 Studies by the U.S. Geological Survey in Alaska, 2005
Summary The collection of papers that follows continues the series of U.S. Geological Survey (USGS) investigative reports in Alaska under the broad umbrella of the geologic sciences. This series represents new and sometimes-preliminary findings that are of interest to Earth scientists in academia, government, and industry; to land and resource managers; and to the general public. The...
Authors
David W. Houseknecht, Kenneth J. Bird, Michelle L. Coombs, Christina A. Neal, Rick L. Wessels, Robert G. McGimsey, John F. Slack, W.C. Pat Shanks, Susan M. Karl, Pamela A. Gemery, Peter E. Bittenbender, W. Ian Ridley, W. Matthew Burns, Daniel O. Hayba, Elisabeth L. Rowan, Robert A. Ayuso, Peter J. Haeussler, Gregory A. Wandless, Anna Colvin
Quiescent deformation of the Aniakchak Caldera, Alaska mapped by InSAR Quiescent deformation of the Aniakchak Caldera, Alaska mapped by InSAR
The 10-km-wide caldera of the historically active Aniakchak volcano, Alaska, subsides ∼13 mm/yr, based on data from 19 European Remote Sensing Satellite (ERS-1 and ERS-2) interferometric synthetic aperture radar (InSAR) images from 1992 through 2002. The pattern of subsidence does not reflect the distribution of pyroclastic deposits from the last eruption in 1931 and therefore is not...
Authors
Oh-Ig Kwoun, Zhong Lu, Christina Neal, Charles W. Wicks
2002 volcanic activity in Alaska and Kamchatka summary of events and response of the Alaska Volcano Observatory 2002 volcanic activity in Alaska and Kamchatka summary of events and response of the Alaska Volcano Observatory
No abstract available.
Authors
Christina Neal, Robert McGimsey, Olga Girina
2001 volcanic activity in Alaska and Kamchatka: Summary of events and response of the Alaska Volcano Observatory 2001 volcanic activity in Alaska and Kamchatka: Summary of events and response of the Alaska Volcano Observatory
The Alaska Volcano Observatory (AVO) monitors the more than 40 historically active volcanoes of the Aleutian Arc. Of these, 22 are monitored with short-period seismic instrument networks as of the end of 2001. The AVO core monitoring program also includes daily analysis of satellite imagery, observation overflights, compilation of pilot reports and reports from local residents and...
Authors
Robert McGimsey, Christina A. Neal, Olga Girina
2003 volcanic activity in Alaska and Kamchatka: Summary of events and response of the Alaska Volcano Observatory 2003 volcanic activity in Alaska and Kamchatka: Summary of events and response of the Alaska Volcano Observatory
The Alaska Volcano Observatory (AVO) monitors the more than 40 historically active volcanoes of the Aleutian Arc. Of these, 24 were considered monitored in real time with short-period seismic instrument networks as of the end of 2003. The AVO core monitoring program also includes daily analysis of satellite imagery, observation over flights, and compilation of pilot reports and reports...
Authors
Robert McGimsey, Christina A. Neal, Olga Girina
Filter Total Items: 61
Science and Products
Filter Total Items: 96
2005 volcanic activity in Alaska, Kamchatka, and the Kurile Islands: Summary of events and response of the Alaska Volcano Observatory 2005 volcanic activity in Alaska, Kamchatka, and the Kurile Islands: Summary of events and response of the Alaska Volcano Observatory
The Alaska Volcano Observatory (AVO) responded to eruptive activity or suspected volcanic activity at or near 16 volcanoes in Alaska during 2005, including the high profile precursory activity associated with the 2005–06 eruption of Augustine Volcano. AVO continues to participate in distributing information about eruptive activity on the Kamchatka Peninsula, Russia, and in the Kurile...
Authors
R. McGimsey, C.A. Neal, J. Dixon, Sergey Ushakov
Hazard information management during the autumn 2004 reawakening of Mount St. Helens volcano, Washington Hazard information management during the autumn 2004 reawakening of Mount St. Helens volcano, Washington
The 2004 reawakening of Mount St. Helens quickly caught the attention of government agencies as well as the international news media and the public. Immediate concerns focused on a repeat of the catastrophic landslide and blast event of May 18, 1980, which remains a vivid memory for many individuals. Within several days of the onset of accelerating seismicity, media inquiries increased
Authors
Carolyn Driedger, Christina A. Neal, Tom Knappenberger, Deborah Needham, Robert B. Harper, William Steele
Atmospheric contribution of gas emissions from Augustine volcano, Alaska during the 2006 eruption Atmospheric contribution of gas emissions from Augustine volcano, Alaska during the 2006 eruption
Airborne surveillance of gas emissions from Augustine for SO2, CO2 and H2S showed no evidence of anomalous degassing from 1990 through May 2005. By December 20, 2005, Augustine was degassing 660 td−1 of SO2, and ten times that by January 4, 2006. The highest SO2 emission rate measured during the 2006 eruption was 8650 td−1 (March 1); for CO2, 13000 td−1 (March 9), and H2S, 8 td−1...
Authors
K.A. McGee, M.P. Doukas, R. McGimsey, C.A. Neal, R.L. Wessels
2006 volcanic activity in Alaska, Kamchatka, and the Kurile Islands: Summary of events and response of the Alaska Volcano Observatory 2006 volcanic activity in Alaska, Kamchatka, and the Kurile Islands: Summary of events and response of the Alaska Volcano Observatory
The Alaska Volcano Observatory (AVO) responded to eruptions, possible eruptions, and volcanic unrest at or near nine separate volcanic centers in Alaska during 2006. A significant explosive eruption at Augustine Volcano in Cook Inlet marked the first eruption within several hundred kilometers of principal population centers in Alaska since 1992. Glaciated Fourpeaked Mountain, a volcano...
Authors
Christina A. Neal, Robert McGimsey, James Dixon, Alexander Manevich, Alexander Rybin
Database for the Geologic Map of the Summit Region of Kilauea Volcano, Hawaii Database for the Geologic Map of the Summit Region of Kilauea Volcano, Hawaii
INTRODUCTION The area covered by this map includes parts of four U.S. Geological Survey (USGS) 7.5' topographic quadrangles (Kilauea Crater, Volcano, Ka`u Desert, and Makaopuhi). It encompasses the summit, upper rift zones, and Koa`e Fault System of Kilauea Volcano and a part of the adjacent, southeast flank of Mauna Loa Volcano. The map is dominated by products of eruptions from Kilauea...
Authors
Dillon Dutton, David Ramsey, Peggy Bruggman, Tracey Felger, Ellen Lougee, Sandy Margriter, Patrick Showalter, Christina A. Neal, John Lockwood
Late pleistocene and holocene caldera-forming eruptions of Okmok Caldera, Aleutian Islands, Alaska Late pleistocene and holocene caldera-forming eruptions of Okmok Caldera, Aleutian Islands, Alaska
This chapter contains sections titled: Introduction Geologic setting Field and Analytical Methods Results Discussion Conclusions
Authors
Jessica F. Larsen, Christina Neal, Janet Schaefer, Jim Beget, Chris Nye
Geothermal disruption of summit glaciers at Mount Spurr Volcano, 2004-6: An unusual manifestation of volcanic unrest Geothermal disruption of summit glaciers at Mount Spurr Volcano, 2004-6: An unusual manifestation of volcanic unrest
Mount Spurr, a 3,374-m-high stratovolcano in the Cook Inlet region of Alaska, showed signs of volcanic unrest beginning in 2004 and lasting through 2006. These signs included increases in heat flow, seismicity, and gas flux, which we interpret as the results of a magmatic intrusion in mid-2004. In response, debris-laden meltwater beneath the glacier in Mount Spurr's geothermally active...
Authors
Michelle Coombs, Christina A. Neal, Rick L. Wessels, Robert McGimsey
Studies by the U.S. Geological Survey in Alaska, 2005 Studies by the U.S. Geological Survey in Alaska, 2005
Summary The collection of papers that follows continues the series of U.S. Geological Survey (USGS) investigative reports in Alaska under the broad umbrella of the geologic sciences. This series represents new and sometimes-preliminary findings that are of interest to Earth scientists in academia, government, and industry; to land and resource managers; and to the general public. The...
Authors
David W. Houseknecht, Kenneth J. Bird, Michelle L. Coombs, Christina A. Neal, Rick L. Wessels, Robert G. McGimsey, John F. Slack, W.C. Pat Shanks, Susan M. Karl, Pamela A. Gemery, Peter E. Bittenbender, W. Ian Ridley, W. Matthew Burns, Daniel O. Hayba, Elisabeth L. Rowan, Robert A. Ayuso, Peter J. Haeussler, Gregory A. Wandless, Anna Colvin
Quiescent deformation of the Aniakchak Caldera, Alaska mapped by InSAR Quiescent deformation of the Aniakchak Caldera, Alaska mapped by InSAR
The 10-km-wide caldera of the historically active Aniakchak volcano, Alaska, subsides ∼13 mm/yr, based on data from 19 European Remote Sensing Satellite (ERS-1 and ERS-2) interferometric synthetic aperture radar (InSAR) images from 1992 through 2002. The pattern of subsidence does not reflect the distribution of pyroclastic deposits from the last eruption in 1931 and therefore is not...
Authors
Oh-Ig Kwoun, Zhong Lu, Christina Neal, Charles W. Wicks
2002 volcanic activity in Alaska and Kamchatka summary of events and response of the Alaska Volcano Observatory 2002 volcanic activity in Alaska and Kamchatka summary of events and response of the Alaska Volcano Observatory
No abstract available.
Authors
Christina Neal, Robert McGimsey, Olga Girina
2001 volcanic activity in Alaska and Kamchatka: Summary of events and response of the Alaska Volcano Observatory 2001 volcanic activity in Alaska and Kamchatka: Summary of events and response of the Alaska Volcano Observatory
The Alaska Volcano Observatory (AVO) monitors the more than 40 historically active volcanoes of the Aleutian Arc. Of these, 22 are monitored with short-period seismic instrument networks as of the end of 2001. The AVO core monitoring program also includes daily analysis of satellite imagery, observation overflights, compilation of pilot reports and reports from local residents and...
Authors
Robert McGimsey, Christina A. Neal, Olga Girina
2003 volcanic activity in Alaska and Kamchatka: Summary of events and response of the Alaska Volcano Observatory 2003 volcanic activity in Alaska and Kamchatka: Summary of events and response of the Alaska Volcano Observatory
The Alaska Volcano Observatory (AVO) monitors the more than 40 historically active volcanoes of the Aleutian Arc. Of these, 24 were considered monitored in real time with short-period seismic instrument networks as of the end of 2003. The AVO core monitoring program also includes daily analysis of satellite imagery, observation over flights, and compilation of pilot reports and reports...
Authors
Robert McGimsey, Christina A. Neal, Olga Girina
Filter Total Items: 61
*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