Alaska Volcano Observatory scientist Mark Hansen working with Larsen Bay Mayor David Harmes on how the AVO-4 particulate monitor operates.
Kristi L. Wallace
Kristi Wallace is an observatory scientist focusing on volcanic ash characterization, eruption response, and interagency coordination.
Kristi Wallace is a geologist with the U.S. Geological Survey (USGS)/Alaska Volcano Observatory (AVO) specializing in volcanic ash research and eruption response. Kristi developed and is the head of the Alaska Tephra Laboratory and Data Center, an interdisciplinary center for studying volcanic ash in Alaska. Ashfall is a principal hazard from Alaska volcanoes; her work focuses on understanding the frequency, distribution, and character of ashfall in Alaska, specifically from Cook Inlet volcanoes because of their risk to major population centers in Alaska. Kristi also plays a significant science and outreach role during eruption responses, documenting ashfall events, working with agency partners and the community, and communicating hazards to partners and the public. In recent years, Kristi has focused on fostering interagency collaborations to help better inform the public about hazards associated with volcanic ash. She is a founder and US leader of the international IAVCEI Volcanic Ashfall Impacts Working Group focused on ashfall hazard mitigation and a leader in the international tephra-community working group focused on establishing best practice guidelines for tephra studies from collection through analysis to improve data sharing and collaboration among tephra scientists. Kristi has worked with the USGS in Alaska since 1997.
Science and Products
Field Work - Scientists and Air-Quality Monitoring
Alaska Volcano Observatory scientist Mark Hansen working with Larsen Bay Mayor David Harmes on how the AVO-4 particulate monitor operates.
Air-quality Monitoring Instruments
Annotated photo of air-quality particulate monitoring instruments, showing temperature and humidity sensors, air-sample inlet tube, wind sensor, power supply, and communication connections.
Annotated photo of air-quality particulate monitoring instruments, showing temperature and humidity sensors, air-sample inlet tube, wind sensor, power supply, and communication connections.
Scanning Electron Microscope image of volcanic ash
Scanning Electron Microscope image of resuspended volcanic ash from the 1912 Novarupta-Katmai deposits in the Katmai region, picked up during high winds on November 1, 2015 and carried to Larsen Bay on Kodiak Island, AK. Sample collected by Sherry Harmes of Larsen Bay.
Scanning Electron Microscope image of resuspended volcanic ash from the 1912 Novarupta-Katmai deposits in the Katmai region, picked up during high winds on November 1, 2015 and carried to Larsen Bay on Kodiak Island, AK. Sample collected by Sherry Harmes of Larsen Bay.
SEM of ash particle from 2010 eruption of Eyjafjallajökull, Iceland
Blocky, non-vesicular ash particle indicative of water-magma interaction.
Blocky, non-vesicular ash particle indicative of water-magma interaction.
SEM Images of ash particles from 1989 eruption of Redoubt Volcano, AK
SEM Images of ash particles from the 1989 eruption of Redoubt Volcano, Alaska.
SEM Images of ash particles from the 1989 eruption of Redoubt Volcano, Alaska.
Emergency Preparedness in Alaska
Nikiski Fire Department on March 28, 2009. Ash fall up to a millimeter thick from Redoubt volcano occurred twice during the 2009 eruption on this area (March 26 and March 28).
Nikiski Fire Department on March 28, 2009. Ash fall up to a millimeter thick from Redoubt volcano occurred twice during the 2009 eruption on this area (March 26 and March 28).
Ash fall accumulation from Redoubt Volcano in Nikiski after March 28, 2009 eruption plume
Photograph of impacts from the volcanic ash fall out in Nikiski, AK from Redoubt volcano. This plume was generated during the March 28, 15:29 AKDT, 2009 event, and ash fall began at approximately 16:16 AKDT and lasted maybe 5 minutes.
Photograph of impacts from the volcanic ash fall out in Nikiski, AK from Redoubt volcano. This plume was generated during the March 28, 15:29 AKDT, 2009 event, and ash fall began at approximately 16:16 AKDT and lasted maybe 5 minutes.
Measurements
Crater Creek warm springs, Mount Spurr Volcano. Chris Waythomas measuring temperature, pH, and conductivity.
Crater Creek warm springs, Mount Spurr Volcano. Chris Waythomas measuring temperature, pH, and conductivity.
Tephra Sampling
Temphra sampling done by Kristi Wallace.
Temphra sampling done by Kristi Wallace.
Science and Products
- Multimedia
Field Work - Scientists and Air-Quality Monitoring
Alaska Volcano Observatory scientist Mark Hansen working with Larsen Bay Mayor David Harmes on how the AVO-4 particulate monitor operates.
Alaska Volcano Observatory scientist Mark Hansen working with Larsen Bay Mayor David Harmes on how the AVO-4 particulate monitor operates.
Air-quality Monitoring InstrumentsAnnotated photo of air-quality particulate monitoring instruments, showing temperature and humidity sensors, air-sample inlet tube, wind sensor, power supply, and communication connections.
Annotated photo of air-quality particulate monitoring instruments, showing temperature and humidity sensors, air-sample inlet tube, wind sensor, power supply, and communication connections.
Scanning Electron Microscope image of volcanic ashScanning Electron Microscope image of resuspended volcanic ash from the 1912 Novarupta-Katmai deposits in the Katmai region, picked up during high winds on November 1, 2015 and carried to Larsen Bay on Kodiak Island, AK. Sample collected by Sherry Harmes of Larsen Bay.
Scanning Electron Microscope image of resuspended volcanic ash from the 1912 Novarupta-Katmai deposits in the Katmai region, picked up during high winds on November 1, 2015 and carried to Larsen Bay on Kodiak Island, AK. Sample collected by Sherry Harmes of Larsen Bay.
SEM of ash particle from 2010 eruption of Eyjafjallajökull, IcelandBlocky, non-vesicular ash particle indicative of water-magma interaction.
Blocky, non-vesicular ash particle indicative of water-magma interaction.
SEM Images of ash particles from 1989 eruption of Redoubt Volcano, AKSEM Images of ash particles from the 1989 eruption of Redoubt Volcano, Alaska.
SEM Images of ash particles from the 1989 eruption of Redoubt Volcano, Alaska.
Emergency Preparedness in AlaskaNikiski Fire Department on March 28, 2009. Ash fall up to a millimeter thick from Redoubt volcano occurred twice during the 2009 eruption on this area (March 26 and March 28).
Nikiski Fire Department on March 28, 2009. Ash fall up to a millimeter thick from Redoubt volcano occurred twice during the 2009 eruption on this area (March 26 and March 28).
Ash fall accumulation from Redoubt Volcano in Nikiski after March 28, 2009 eruption plumePhotograph of impacts from the volcanic ash fall out in Nikiski, AK from Redoubt volcano. This plume was generated during the March 28, 15:29 AKDT, 2009 event, and ash fall began at approximately 16:16 AKDT and lasted maybe 5 minutes.
Photograph of impacts from the volcanic ash fall out in Nikiski, AK from Redoubt volcano. This plume was generated during the March 28, 15:29 AKDT, 2009 event, and ash fall began at approximately 16:16 AKDT and lasted maybe 5 minutes.
MeasurementsCrater Creek warm springs, Mount Spurr Volcano. Chris Waythomas measuring temperature, pH, and conductivity.
Crater Creek warm springs, Mount Spurr Volcano. Chris Waythomas measuring temperature, pH, and conductivity.
Tephra SamplingTemphra sampling done by Kristi Wallace.
Temphra sampling done by Kristi Wallace.
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