David Hill (Former Employee)
Science and Products
Filter Total Items: 65
Living with a restless caldera: Long Valley, California Living with a restless caldera: Long Valley, California
No abstract available.
Authors
David P. Hill, Roy A. Bailey, Michael L. Sorey, James W. Hendley, Peter H. Stauffer
Earthquakes and carbon dioxide beneath Mammoth Mountain, California Earthquakes and carbon dioxide beneath Mammoth Mountain, California
No abstract available.
Authors
David P. Hill
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, earth scientists 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...
Authors
Michael L. Sorey, Christopher D. Farrar, William C. Evans, David P. Hill, Roy A. Bailey, James W. Hendley, Peter H. Stauffer
Long-period earthquakes in the Long Valley Caldera Region, eastern California Long-period earthquakes in the Long Valley Caldera Region, eastern California
Most earthquakes occurring near Long Valley caldera since the onset of recurring swarm activity in 1980 have the broad-band signature typical of tectonic or volcano-tectonic earthquakes with impulsive, high-frequency P and S waves. With the Mammoth Mountain earthquake swarm in mid 1989, we began detecting occasional events with a marked deficiency in energy above 5 Hz, a feature typical...
Authors
Andrew M. Pitt, David P. Hill
The Loma Prieta, California, earthquake of October 17, 1989: Preseismic observations The Loma Prieta, California, earthquake of October 17, 1989: Preseismic observations
The October 17, 1989, Loma Prieta, Calif., Ms=7.1 earthquake provided the first opportunity in the history of fault monitoring in the United States to gather multidisciplinary preearthquake data in the near field of an M=7 earthquake. The data obtained include observations on seismicity, continuous strain, long-term ground displacement, magnetic field, and hydrology. The papers in this...
Authors
Malcolm J. S. Johnston, Jean A. Olson, David P. Hill, Anthony C. Fraser-Smith, Arman Bernardi, Robert A. Helliwell, Paul R. McGill, O.G. Villard, Robert J. Mueller, Randall A. White, William L. Ellsworth, Evelyn A. Roeloffs, Alan T. Linde, M. T. Gladwin, R. L. Gwyther, R.H.G. Hart, Michael Lisowski, James C. Savage, William H. Prescott, Jerry L. Svarc, Mark Hunter Murray, P.G. Silver, N. J. Valette-Silver, Olga Kolbek
Data report for the August 1982 seismic-refraction experiment in the Mono Craters-Long Valley region, California Data report for the August 1982 seismic-refraction experiment in the Mono Craters-Long Valley region, California
No abstract available.
Authors
Patricia J. Meador, David P. Hill
Science and Products
Filter Total Items: 65
Living with a restless caldera: Long Valley, California Living with a restless caldera: Long Valley, California
No abstract available.
Authors
David P. Hill, Roy A. Bailey, Michael L. Sorey, James W. Hendley, Peter H. Stauffer
Earthquakes and carbon dioxide beneath Mammoth Mountain, California Earthquakes and carbon dioxide beneath Mammoth Mountain, California
No abstract available.
Authors
David P. Hill
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, earth scientists 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...
Authors
Michael L. Sorey, Christopher D. Farrar, William C. Evans, David P. Hill, Roy A. Bailey, James W. Hendley, Peter H. Stauffer
Long-period earthquakes in the Long Valley Caldera Region, eastern California Long-period earthquakes in the Long Valley Caldera Region, eastern California
Most earthquakes occurring near Long Valley caldera since the onset of recurring swarm activity in 1980 have the broad-band signature typical of tectonic or volcano-tectonic earthquakes with impulsive, high-frequency P and S waves. With the Mammoth Mountain earthquake swarm in mid 1989, we began detecting occasional events with a marked deficiency in energy above 5 Hz, a feature typical...
Authors
Andrew M. Pitt, David P. Hill
The Loma Prieta, California, earthquake of October 17, 1989: Preseismic observations The Loma Prieta, California, earthquake of October 17, 1989: Preseismic observations
The October 17, 1989, Loma Prieta, Calif., Ms=7.1 earthquake provided the first opportunity in the history of fault monitoring in the United States to gather multidisciplinary preearthquake data in the near field of an M=7 earthquake. The data obtained include observations on seismicity, continuous strain, long-term ground displacement, magnetic field, and hydrology. The papers in this...
Authors
Malcolm J. S. Johnston, Jean A. Olson, David P. Hill, Anthony C. Fraser-Smith, Arman Bernardi, Robert A. Helliwell, Paul R. McGill, O.G. Villard, Robert J. Mueller, Randall A. White, William L. Ellsworth, Evelyn A. Roeloffs, Alan T. Linde, M. T. Gladwin, R. L. Gwyther, R.H.G. Hart, Michael Lisowski, James C. Savage, William H. Prescott, Jerry L. Svarc, Mark Hunter Murray, P.G. Silver, N. J. Valette-Silver, Olga Kolbek
Data report for the August 1982 seismic-refraction experiment in the Mono Craters-Long Valley region, California Data report for the August 1982 seismic-refraction experiment in the Mono Craters-Long Valley region, California
No abstract available.
Authors
Patricia J. Meador, David P. Hill
*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