David Hill (Former Employee)
Science and Products
Filter Total Items: 65
Monitoring super-volcanoes: Geophysical and geochemical signals at Yellowstone and other large caldera systems Monitoring super-volcanoes: Geophysical and geochemical signals at Yellowstone and other large caldera systems
Earth's largest calderas form as the ground collapses during immense volcanic eruptions, when hundreds to thousands of cubic kilometres of magma are explosively withdrawn from the Earth's crust over a period of days to weeks. Continuing long after such great eruptions, the resulting calderas often exhibit pronounced unrest, with frequent earthquakes, alternating uplift and subsidence of...
Authors
Jacob Lowenstern, Robert Smith, David P. Hill
Interdisciplinary discussion of volcanic processes beneath the Long Valley Caldera-Mono Craters Area Interdisciplinary discussion of volcanic processes beneath the Long Valley Caldera-Mono Craters Area
Volcanism in the Long Valley Caldera-Mono Craters (LVCMC) volcanic field in eastern California over the past 4 Ma is dominated by the 0.76 Ma caldera-forming eruption of 600 km3 of rhyolite to form the Bishop Tuff. Over the last 150 k.y., volcanism has concentrated along the Mono-Inyo chain, which extends 45 km north from Mammoth Mountain to Mono Lake (Figure 1, below). Recent eruptions...
Authors
David Hill, Paul Segall
EarthScoping the inner workings of magmatic systems EarthScoping the inner workings of magmatic systems
In the shadow of one of the world's great volcanic systems, an intensive 3-day workshop was undertaken to work toward developing a scientific plan for the magmatic systems component of the U.S. National Science Foundation's (NSF) EarthScope Initiative. This NSF-sponsored workshop was designed to provide direction to the EarthScope planning committee and the NSF in developing scientific...
Authors
Michael Hamburger, Stephen McNutt, Daniel Dzurisin, Jonathan Fink, David Hill, Charles Meertens, Chris Newhall, Susan Owen, John Power
High precision earthquake locations reveal seismogenic structure beneath Mammoth Mountain, California High precision earthquake locations reveal seismogenic structure beneath Mammoth Mountain, California
In 1989, an unusual earthquake swarm occurred beneath Mammoth Mountain that was probably associated with magmatic intrusion. To improve our understanding of this swarm, we relocated Mammoth Mountain earthquakes using a double difference algorithm. Relocated hypocenters reveal that most earthquakes occurred on two structures, a near-vertical plane at 7–9 km depth that has been interpreted...
Authors
Stephanie Prejean, Anna Stork, William Ellsworth, David Hill, Bruce Julian
Human-induced contaminant impacts on migratory birds: Lessons from the North American eared grebe (Podiceps nigricollis) Human-induced contaminant impacts on migratory birds: Lessons from the North American eared grebe (Podiceps nigricollis)
The effects of aquatic contaminants generated by soda ash mining processes on the North American eared grebe (Podiceps nigricollis) population illustrates important issues associated with human-induced habitat degradation on the health of migratory species. Eared grebes have been extensively studied in their staging and breeding habitats, but little is known about their 2- to 3-day...
Authors
Kurt Sladky, Charlotte Quist, Pedro Ramirez, David Hill, F. Dein
Earthquake-volcano interactions Earthquake-volcano interactions
No abstract available.
Authors
David Hill, Frederick Pollitz, Christopher Newhall
Response plan for volcano hazards in the Long Valley Caldera and Mono Craters region, California Response plan for volcano hazards in the Long Valley Caldera and Mono Craters region, California
No abstract available.
Authors
David Hill, Daniel Dzurisin, William Ellsworth, Elliot Endo, D. L. Galloway, Terry Gerlach, Malcolm Johnston, John Langbein, Ken McGee, C. Miller, David Oppenheimer, Michael Sorey
Very-long-period volcanic earthquakes beneath Mammoth Mountain, California Very-long-period volcanic earthquakes beneath Mammoth Mountain, California
Detection of three very‐long‐period (VLP) volcanic earthquakes beneath Mammoth Mountain emphasizes that magmatic processes continue to be active beneath this young, eastern California volcano. These VLP earthquakes, which occurred in October 1996 and July and August 2000, appear as bell‐shaped pulses with durations of one to two minutes on a nearby borehole dilatometer and on the...
Authors
David Hill, P. Dawson, M.J.S. Johnston, A. M. Pitt, G. Biasi, K. Smith
Invisible CO2 gas killing trees at Mammoth Mountain, California Invisible CO2 gas killing trees at Mammoth Mountain, California
Since 1980, scientists have monitored geologic unrest in Long Valley Caldera and at adjacent Mammoth Mountain, California. After a persistent swarm of earthquakes beneath Mammoth Mountain in 1989, geologists discovered that large volumes of carbon dioxide (CO2 ) gas were seeping from beneath this volcano. This gas is killing trees on the mountain and also can be a danger to people. The U...
Authors
Michael Sorey, Christopher Farrar, Terrance Gerlach, Kenneth McGee, William Evans, Elizabeth Colvard, David Hill, Roy Bailey, John Rogie, James Hendley, Peter Stauffer
Living with a restless caldera: Long Valley, California Living with a restless caldera: Long Valley, California
No abstract available
Authors
David Hill, Roy Bailey, Michael Sorey, James Hendley, Peter Stauffer
Scientific Drilling in Long Valley, California - What Will We Learn? Scientific Drilling in Long Valley, California - What Will We Learn?
No abstract available.
Authors
Susan Priest, John H. Hass, Bill Ellsworth, Christopher Farrar, Michael Sorey, David Hill, Roy Bailey, Ronald Jacobson, John Finger, Vicki McConnell, Mark Zoback
Future eruptions in California's Long Valley area - what's likely? Future eruptions in California's Long Valley area - what's likely?
No abstract available.
Authors
David Hill, Roy Bailey, C. Miller, James Hendley, Peter Stauffer
Science and Products
Filter Total Items: 65
Monitoring super-volcanoes: Geophysical and geochemical signals at Yellowstone and other large caldera systems Monitoring super-volcanoes: Geophysical and geochemical signals at Yellowstone and other large caldera systems
Earth's largest calderas form as the ground collapses during immense volcanic eruptions, when hundreds to thousands of cubic kilometres of magma are explosively withdrawn from the Earth's crust over a period of days to weeks. Continuing long after such great eruptions, the resulting calderas often exhibit pronounced unrest, with frequent earthquakes, alternating uplift and subsidence of...
Authors
Jacob Lowenstern, Robert Smith, David P. Hill
Interdisciplinary discussion of volcanic processes beneath the Long Valley Caldera-Mono Craters Area Interdisciplinary discussion of volcanic processes beneath the Long Valley Caldera-Mono Craters Area
Volcanism in the Long Valley Caldera-Mono Craters (LVCMC) volcanic field in eastern California over the past 4 Ma is dominated by the 0.76 Ma caldera-forming eruption of 600 km3 of rhyolite to form the Bishop Tuff. Over the last 150 k.y., volcanism has concentrated along the Mono-Inyo chain, which extends 45 km north from Mammoth Mountain to Mono Lake (Figure 1, below). Recent eruptions...
Authors
David Hill, Paul Segall
EarthScoping the inner workings of magmatic systems EarthScoping the inner workings of magmatic systems
In the shadow of one of the world's great volcanic systems, an intensive 3-day workshop was undertaken to work toward developing a scientific plan for the magmatic systems component of the U.S. National Science Foundation's (NSF) EarthScope Initiative. This NSF-sponsored workshop was designed to provide direction to the EarthScope planning committee and the NSF in developing scientific...
Authors
Michael Hamburger, Stephen McNutt, Daniel Dzurisin, Jonathan Fink, David Hill, Charles Meertens, Chris Newhall, Susan Owen, John Power
High precision earthquake locations reveal seismogenic structure beneath Mammoth Mountain, California High precision earthquake locations reveal seismogenic structure beneath Mammoth Mountain, California
In 1989, an unusual earthquake swarm occurred beneath Mammoth Mountain that was probably associated with magmatic intrusion. To improve our understanding of this swarm, we relocated Mammoth Mountain earthquakes using a double difference algorithm. Relocated hypocenters reveal that most earthquakes occurred on two structures, a near-vertical plane at 7–9 km depth that has been interpreted...
Authors
Stephanie Prejean, Anna Stork, William Ellsworth, David Hill, Bruce Julian
Human-induced contaminant impacts on migratory birds: Lessons from the North American eared grebe (Podiceps nigricollis) Human-induced contaminant impacts on migratory birds: Lessons from the North American eared grebe (Podiceps nigricollis)
The effects of aquatic contaminants generated by soda ash mining processes on the North American eared grebe (Podiceps nigricollis) population illustrates important issues associated with human-induced habitat degradation on the health of migratory species. Eared grebes have been extensively studied in their staging and breeding habitats, but little is known about their 2- to 3-day...
Authors
Kurt Sladky, Charlotte Quist, Pedro Ramirez, David Hill, F. Dein
Earthquake-volcano interactions Earthquake-volcano interactions
No abstract available.
Authors
David Hill, Frederick Pollitz, Christopher Newhall
Response plan for volcano hazards in the Long Valley Caldera and Mono Craters region, California Response plan for volcano hazards in the Long Valley Caldera and Mono Craters region, California
No abstract available.
Authors
David Hill, Daniel Dzurisin, William Ellsworth, Elliot Endo, D. L. Galloway, Terry Gerlach, Malcolm Johnston, John Langbein, Ken McGee, C. Miller, David Oppenheimer, Michael Sorey
Very-long-period volcanic earthquakes beneath Mammoth Mountain, California Very-long-period volcanic earthquakes beneath Mammoth Mountain, California
Detection of three very‐long‐period (VLP) volcanic earthquakes beneath Mammoth Mountain emphasizes that magmatic processes continue to be active beneath this young, eastern California volcano. These VLP earthquakes, which occurred in October 1996 and July and August 2000, appear as bell‐shaped pulses with durations of one to two minutes on a nearby borehole dilatometer and on the...
Authors
David Hill, P. Dawson, M.J.S. Johnston, A. M. Pitt, G. Biasi, K. Smith
Invisible CO2 gas killing trees at Mammoth Mountain, California Invisible CO2 gas killing trees at Mammoth Mountain, California
Since 1980, scientists have monitored geologic unrest in Long Valley Caldera and at adjacent Mammoth Mountain, California. After a persistent swarm of earthquakes beneath Mammoth Mountain in 1989, geologists discovered that large volumes of carbon dioxide (CO2 ) gas were seeping from beneath this volcano. This gas is killing trees on the mountain and also can be a danger to people. The U...
Authors
Michael Sorey, Christopher Farrar, Terrance Gerlach, Kenneth McGee, William Evans, Elizabeth Colvard, David Hill, Roy Bailey, John Rogie, James Hendley, Peter Stauffer
Living with a restless caldera: Long Valley, California Living with a restless caldera: Long Valley, California
No abstract available
Authors
David Hill, Roy Bailey, Michael Sorey, James Hendley, Peter Stauffer
Scientific Drilling in Long Valley, California - What Will We Learn? Scientific Drilling in Long Valley, California - What Will We Learn?
No abstract available.
Authors
Susan Priest, John H. Hass, Bill Ellsworth, Christopher Farrar, Michael Sorey, David Hill, Roy Bailey, Ronald Jacobson, John Finger, Vicki McConnell, Mark Zoback
Future eruptions in California's Long Valley area - what's likely? Future eruptions in California's Long Valley area - what's likely?
No abstract available.
Authors
David Hill, Roy Bailey, C. Miller, James Hendley, Peter Stauffer
*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