Julia Griswold
Volcano geologist working with the Volcano Disaster Assistance Program. Manages satellite remote sensing data to answer questions about the status of unrest at volcanoes around the world. Works as a project manager for the International Charter for Space and Major Disasters.
Education and Certifications
B.S. Applied Mathematics and Geology, Union College 1996
M.S. Geology, Portland State University 2004
Science and Products
Optimizing satellite resources for the global assessment and mitigation of volcanic hazards—Suggestions from the USGS Powell Center Volcano Remote Sensing Working Group Optimizing satellite resources for the global assessment and mitigation of volcanic hazards—Suggestions from the USGS Powell Center Volcano Remote Sensing Working Group
A significant number of the world’s approximately 1,400 subaerial volcanoes with Holocene eruptions are unmonitored by ground-based sensors yet constitute a potential hazard to nearby residents and infrastructure, as well as air travel and global commerce. Data from an international constellation of more than 60 current satellite instruments provide a cost-effective means of tracking...
Authors
M. E. Pritchard, M. Poland, K. Reath, B. Andrews, M. Bagnardi, J. Biggs, S. Carn, D. Coppola, S.K. Ebmeier, M.A. Furtney, T. Girona, J. Griswold, T. Lopez, P. Lundgren, S. Ogburn, M. Pavolonis, E. Rumpf, G. Vaughan, C. Wauthier, R. Wessels, R. Wright, K.R. Anderson, M.G. Bato, A. Roman
Monitoring, forecasting collapse events, and mapping pyroclastic deposits at Sinabung volcano with satellite imagery Monitoring, forecasting collapse events, and mapping pyroclastic deposits at Sinabung volcano with satellite imagery
During the ongoing (2013–present) eruption of Sinabung volcano, north Sumatra, we have routinely used a variety of satellite remote sensing data to observe and forecast lava dome and lava flow collapse events, to map the resulting pyroclastic deposits, and to estimate effusion rates. In this paper, we focus on the first two years of the current eruption (September 2013–December 2015)...
Authors
John S. Pallister, Rick Wessels, Julia P. Griswold, Wendy A. McCausland, Nugraha Kartadinata, Hendra Gunawan, Agus Budianto, Sofyan Primulyana
Thermal, deformation, and degassing remote sensing time-series (A.D. 2000-2017) at the 47 most active volcanoes in Latin America: Implications for volcanic systems Thermal, deformation, and degassing remote sensing time-series (A.D. 2000-2017) at the 47 most active volcanoes in Latin America: Implications for volcanic systems
Volcanoes are hazardous to local and global populations, but only a fraction are continuously monitored by ground-based sensors. For example, in Latin America, more than 60% of Holocene volcanoes are unmonitored, meaning long-term multi-parameter datasets of volcanic activity are rare and sparse. We use satellite observations of degassing, thermal anomalies, and surface deformation...
Authors
Kevin Reath, Matthew Pritchard, Michael P. Poland, F. Delgado, S. Carn, D. Coppola, B. J. Andrews, S.K. Ebmeier, M. Elise Rumpf, S. Henderson, S. Baker, P. Lundgren, R. Erik Wright, J. Biggs, T. Lopez, C. Wauthier, S. Moruzzi, A. Alcott, Rick Wessels, Julia P. Griswold, Sarah E. Ogburn, S. C. Loughlin, F. Meyer, R. Greg Vaughan, M. Bagnardi
Modeled inundation limits of potential lahars from Mount Adams in the White Salmon River Valley, Washington Modeled inundation limits of potential lahars from Mount Adams in the White Salmon River Valley, Washington
Lahars large enough to reach populated areas are a hazard at Mount Adams, a massive volcano in the southern Cascade Range of Washington State (fig. 1). It is considered to be still active and has the potential to erupt again. By definition, lahars are gravity-driven flows of water-saturated mixtures of mud and rock (plus or minus ice, wood, and other debris), which originate from...
Authors
Julia P. Griswold, Thomas C. Pierson, Joseph A. Bard
Construction of probabilistic event trees for eruption forecasting at Sinabung volcano, Indonesia 2013–14 Construction of probabilistic event trees for eruption forecasting at Sinabung volcano, Indonesia 2013–14
Eruptions of Sinabung volcano, Indonesia have been ongoing since 2013. Since that time, the character of eruptions has changed, from phreatic to phreatomagmatic to magmatic explosive eruptions, and from production of a lava dome that collapsed to a subsequent thick lava flow that slowly ceased to be active, and later, to a new lava dome. As the eruption progressed, event trees were...
Authors
Heather M. Wright, John S. Pallister, Wendy A. McCausland, Julia P. Griswold, Supriyati Andreastuti, Agus Budianto, Sofyan Primulyana, Maurizio Battaglia, Angie Diefenbach, John W. Ewert, Peter J. Kelly, Christoph Kern, Martin R. LaFevers, Andrew B. Lockhart, Jeffrey N. Marso, Gari C. Mayberry, Steve P. Schilling, Rick Wessels, Randall A. White, Nurnaning Aisyah, Nugraha Kartadinata, Kristianto, Raditya Putra, Ugan Boyson Saing, Agus Solihin, Yasa Suparman, Devy Damil Syahbana, Hetty Triastuty
Merapi 2010 eruption—Chronology and extrusion rates monitored with satellite radar and used in eruption forecasting Merapi 2010 eruption—Chronology and extrusion rates monitored with satellite radar and used in eruption forecasting
Despite dense cloud cover, satellite-borne commercial Synthetic Aperture Radar (SAR) enabled frequent monitoring of Merapi volcano's 2010 eruption. Near-real-time interpretation of images derived from the amplitude of the SAR signals and timely delivery of these interpretations to those responsible for warnings, allowed satellite remote sensing for the first time to play an equal role...
Authors
John S. Pallister, David J. Schneider, Julia P. Griswold, Ronald H. Keeler, William C. Burton, Christopher Noyles, Christopher G. Newhall, Antonius Ratdomopurbo
The Chaitén rhyolite lava dome: Eruption sequence, lava dome volumes, rapid effusion rates and source of the rhyolite magma The Chaitén rhyolite lava dome: Eruption sequence, lava dome volumes, rapid effusion rates and source of the rhyolite magma
We use geologic field mapping and sampling, photogrammetric analysis of oblique aerial photographs, and digital elevation models to document the 2008-2009 eruptive sequence at Chaitén Volcano and to estimate volumes and effusion rates for the lava dome. We also present geochemical and petrologic data that contribute to understanding the source of the rhyolite and its unusually rapid...
Authors
John S. Pallister, Angela K. Diefenbach, William C. Burton, Jorge Munoz, Julia P. Griswold, Luis E. Lara, Jacob B. Lowenstern, Carolina E. Valenzuela
Recent explosive eruptions and volcano hazards at Soputan volcano—a basalt stratovolcano in north Sulawesi, Indonesia Recent explosive eruptions and volcano hazards at Soputan volcano—a basalt stratovolcano in north Sulawesi, Indonesia
Soputan is a high-alumina basalt stratovolcano located in the active North Sulawesi-Sangihe Islands magmatic arc. Although immediately adjacent to the still geothermally active Quaternary Tondono Caldera, Soputan’s magmas are geochemically distinct from those of the caldera and from other magmas in the arc. Unusual for a basalt volcano, Soputan produces summit lava domes and explosive...
Authors
Kushendratno, John S. Pallister, Kristianto, Farid Ruskanda Bina, Wendy McCausland, Simon Carn, Julia P. Griswold, Ronald H. Keeler
The 2010 explosive eruption of Java's Merapi volcano—A ‘100-year’ event The 2010 explosive eruption of Java's Merapi volcano—A ‘100-year’ event
Merapi volcano (Indonesia) is one of the most active and hazardous volcanoes in the world. It is known for frequent small to moderate eruptions, pyroclastic flows produced by lava dome collapse, and the large population settled on and around the flanks of the volcano that is at risk. Its usual behavior for the last decades abruptly changed in late October and early November 2010, when...
Authors
Surono, Philippe Jousset, John S. Pallister, Marie Boichu, M. Fabrizia Buongiorno, Agus Budisantoso, Fidel Costa, Supriyati Andreastuti, Fred Prata, David J. Schneider, Lieven Clarisse, Hanik Humaida, Sri Sumarti, Christian Bignami, Julia P. Griswold, Simon A. Carn, Clive Oppenheimer, Franck Lavigne
Positive feedback and momentum growth during debris-flow entrainment of wet bed sediment Positive feedback and momentum growth during debris-flow entrainment of wet bed sediment
Debris flows typically occur when intense rainfall or snowmelt triggers landslides or extensive erosion on steep, debris-mantled slopes. The flows can then grow dramatically in size and speed as they entrain material from their beds and banks, but the mechanism of this growth is unclear. Indeed, momentum conservation implies that entrainment of static material should retard the motion of...
Authors
Richard M. Iverson, Mark E. Reid, Matthew Logan, Richard G. Lahusen, Jonathan W. Godt, Julia P. Griswold
Mobility statistics and automated hazard mapping for debris flows and rock avalanches Mobility statistics and automated hazard mapping for debris flows and rock avalanches
Power-law equations that are physically motivated and statistically tested and calibrated provide a basis for forecasting areas likely to be inundated by debris flows, rock avalanches, and lahars with diverse volumes. The equations A=α1V2/3 and B=α2V2/3 are based on the postulate that the maximum valley cross-sectional area (A) and total valley planimetric area (B) likely to be inundated...
Authors
Julia P. Griswold, Richard M. Iverson
Mount St. Helens reloaded--Applying GIS to the ongoing eruption of Mount St. Helens, Washington Mount St. Helens reloaded--Applying GIS to the ongoing eruption of Mount St. Helens, Washington
No abstract available.
Authors
D.W. Ramsey, S. P. Schilling, J.E. Robinson, Julia P. Griswold, R. S. Wardell, John W. Ewert
Science and Products
Optimizing satellite resources for the global assessment and mitigation of volcanic hazards—Suggestions from the USGS Powell Center Volcano Remote Sensing Working Group Optimizing satellite resources for the global assessment and mitigation of volcanic hazards—Suggestions from the USGS Powell Center Volcano Remote Sensing Working Group
A significant number of the world’s approximately 1,400 subaerial volcanoes with Holocene eruptions are unmonitored by ground-based sensors yet constitute a potential hazard to nearby residents and infrastructure, as well as air travel and global commerce. Data from an international constellation of more than 60 current satellite instruments provide a cost-effective means of tracking...
Authors
M. E. Pritchard, M. Poland, K. Reath, B. Andrews, M. Bagnardi, J. Biggs, S. Carn, D. Coppola, S.K. Ebmeier, M.A. Furtney, T. Girona, J. Griswold, T. Lopez, P. Lundgren, S. Ogburn, M. Pavolonis, E. Rumpf, G. Vaughan, C. Wauthier, R. Wessels, R. Wright, K.R. Anderson, M.G. Bato, A. Roman
Monitoring, forecasting collapse events, and mapping pyroclastic deposits at Sinabung volcano with satellite imagery Monitoring, forecasting collapse events, and mapping pyroclastic deposits at Sinabung volcano with satellite imagery
During the ongoing (2013–present) eruption of Sinabung volcano, north Sumatra, we have routinely used a variety of satellite remote sensing data to observe and forecast lava dome and lava flow collapse events, to map the resulting pyroclastic deposits, and to estimate effusion rates. In this paper, we focus on the first two years of the current eruption (September 2013–December 2015)...
Authors
John S. Pallister, Rick Wessels, Julia P. Griswold, Wendy A. McCausland, Nugraha Kartadinata, Hendra Gunawan, Agus Budianto, Sofyan Primulyana
Thermal, deformation, and degassing remote sensing time-series (A.D. 2000-2017) at the 47 most active volcanoes in Latin America: Implications for volcanic systems Thermal, deformation, and degassing remote sensing time-series (A.D. 2000-2017) at the 47 most active volcanoes in Latin America: Implications for volcanic systems
Volcanoes are hazardous to local and global populations, but only a fraction are continuously monitored by ground-based sensors. For example, in Latin America, more than 60% of Holocene volcanoes are unmonitored, meaning long-term multi-parameter datasets of volcanic activity are rare and sparse. We use satellite observations of degassing, thermal anomalies, and surface deformation...
Authors
Kevin Reath, Matthew Pritchard, Michael P. Poland, F. Delgado, S. Carn, D. Coppola, B. J. Andrews, S.K. Ebmeier, M. Elise Rumpf, S. Henderson, S. Baker, P. Lundgren, R. Erik Wright, J. Biggs, T. Lopez, C. Wauthier, S. Moruzzi, A. Alcott, Rick Wessels, Julia P. Griswold, Sarah E. Ogburn, S. C. Loughlin, F. Meyer, R. Greg Vaughan, M. Bagnardi
Modeled inundation limits of potential lahars from Mount Adams in the White Salmon River Valley, Washington Modeled inundation limits of potential lahars from Mount Adams in the White Salmon River Valley, Washington
Lahars large enough to reach populated areas are a hazard at Mount Adams, a massive volcano in the southern Cascade Range of Washington State (fig. 1). It is considered to be still active and has the potential to erupt again. By definition, lahars are gravity-driven flows of water-saturated mixtures of mud and rock (plus or minus ice, wood, and other debris), which originate from...
Authors
Julia P. Griswold, Thomas C. Pierson, Joseph A. Bard
Construction of probabilistic event trees for eruption forecasting at Sinabung volcano, Indonesia 2013–14 Construction of probabilistic event trees for eruption forecasting at Sinabung volcano, Indonesia 2013–14
Eruptions of Sinabung volcano, Indonesia have been ongoing since 2013. Since that time, the character of eruptions has changed, from phreatic to phreatomagmatic to magmatic explosive eruptions, and from production of a lava dome that collapsed to a subsequent thick lava flow that slowly ceased to be active, and later, to a new lava dome. As the eruption progressed, event trees were...
Authors
Heather M. Wright, John S. Pallister, Wendy A. McCausland, Julia P. Griswold, Supriyati Andreastuti, Agus Budianto, Sofyan Primulyana, Maurizio Battaglia, Angie Diefenbach, John W. Ewert, Peter J. Kelly, Christoph Kern, Martin R. LaFevers, Andrew B. Lockhart, Jeffrey N. Marso, Gari C. Mayberry, Steve P. Schilling, Rick Wessels, Randall A. White, Nurnaning Aisyah, Nugraha Kartadinata, Kristianto, Raditya Putra, Ugan Boyson Saing, Agus Solihin, Yasa Suparman, Devy Damil Syahbana, Hetty Triastuty
Merapi 2010 eruption—Chronology and extrusion rates monitored with satellite radar and used in eruption forecasting Merapi 2010 eruption—Chronology and extrusion rates monitored with satellite radar and used in eruption forecasting
Despite dense cloud cover, satellite-borne commercial Synthetic Aperture Radar (SAR) enabled frequent monitoring of Merapi volcano's 2010 eruption. Near-real-time interpretation of images derived from the amplitude of the SAR signals and timely delivery of these interpretations to those responsible for warnings, allowed satellite remote sensing for the first time to play an equal role...
Authors
John S. Pallister, David J. Schneider, Julia P. Griswold, Ronald H. Keeler, William C. Burton, Christopher Noyles, Christopher G. Newhall, Antonius Ratdomopurbo
The Chaitén rhyolite lava dome: Eruption sequence, lava dome volumes, rapid effusion rates and source of the rhyolite magma The Chaitén rhyolite lava dome: Eruption sequence, lava dome volumes, rapid effusion rates and source of the rhyolite magma
We use geologic field mapping and sampling, photogrammetric analysis of oblique aerial photographs, and digital elevation models to document the 2008-2009 eruptive sequence at Chaitén Volcano and to estimate volumes and effusion rates for the lava dome. We also present geochemical and petrologic data that contribute to understanding the source of the rhyolite and its unusually rapid...
Authors
John S. Pallister, Angela K. Diefenbach, William C. Burton, Jorge Munoz, Julia P. Griswold, Luis E. Lara, Jacob B. Lowenstern, Carolina E. Valenzuela
Recent explosive eruptions and volcano hazards at Soputan volcano—a basalt stratovolcano in north Sulawesi, Indonesia Recent explosive eruptions and volcano hazards at Soputan volcano—a basalt stratovolcano in north Sulawesi, Indonesia
Soputan is a high-alumina basalt stratovolcano located in the active North Sulawesi-Sangihe Islands magmatic arc. Although immediately adjacent to the still geothermally active Quaternary Tondono Caldera, Soputan’s magmas are geochemically distinct from those of the caldera and from other magmas in the arc. Unusual for a basalt volcano, Soputan produces summit lava domes and explosive...
Authors
Kushendratno, John S. Pallister, Kristianto, Farid Ruskanda Bina, Wendy McCausland, Simon Carn, Julia P. Griswold, Ronald H. Keeler
The 2010 explosive eruption of Java's Merapi volcano—A ‘100-year’ event The 2010 explosive eruption of Java's Merapi volcano—A ‘100-year’ event
Merapi volcano (Indonesia) is one of the most active and hazardous volcanoes in the world. It is known for frequent small to moderate eruptions, pyroclastic flows produced by lava dome collapse, and the large population settled on and around the flanks of the volcano that is at risk. Its usual behavior for the last decades abruptly changed in late October and early November 2010, when...
Authors
Surono, Philippe Jousset, John S. Pallister, Marie Boichu, M. Fabrizia Buongiorno, Agus Budisantoso, Fidel Costa, Supriyati Andreastuti, Fred Prata, David J. Schneider, Lieven Clarisse, Hanik Humaida, Sri Sumarti, Christian Bignami, Julia P. Griswold, Simon A. Carn, Clive Oppenheimer, Franck Lavigne
Positive feedback and momentum growth during debris-flow entrainment of wet bed sediment Positive feedback and momentum growth during debris-flow entrainment of wet bed sediment
Debris flows typically occur when intense rainfall or snowmelt triggers landslides or extensive erosion on steep, debris-mantled slopes. The flows can then grow dramatically in size and speed as they entrain material from their beds and banks, but the mechanism of this growth is unclear. Indeed, momentum conservation implies that entrainment of static material should retard the motion of...
Authors
Richard M. Iverson, Mark E. Reid, Matthew Logan, Richard G. Lahusen, Jonathan W. Godt, Julia P. Griswold
Mobility statistics and automated hazard mapping for debris flows and rock avalanches Mobility statistics and automated hazard mapping for debris flows and rock avalanches
Power-law equations that are physically motivated and statistically tested and calibrated provide a basis for forecasting areas likely to be inundated by debris flows, rock avalanches, and lahars with diverse volumes. The equations A=α1V2/3 and B=α2V2/3 are based on the postulate that the maximum valley cross-sectional area (A) and total valley planimetric area (B) likely to be inundated...
Authors
Julia P. Griswold, Richard M. Iverson
Mount St. Helens reloaded--Applying GIS to the ongoing eruption of Mount St. Helens, Washington Mount St. Helens reloaded--Applying GIS to the ongoing eruption of Mount St. Helens, Washington
No abstract available.
Authors
D.W. Ramsey, S. P. Schilling, J.E. Robinson, Julia P. Griswold, R. S. Wardell, John W. Ewert