David Hill (Former Employee)
Science and Products
Filter Total Items: 65
Drivers of Holocene sea-level change in the Caribbean Drivers of Holocene sea-level change in the Caribbean
We present a Holocene relative sea-level (RSL) database for the Caribbean region (5°N to 25°N and 55°W to 90°W) that consists of 499 sea-level index points and 238 limiting dates. The database was compiled from multiple sea-level indicators (mangrove peat, microbial mats, beach rock and acroporid and massive corals). We subdivided the database into 20 regions to investigate the influence...
Authors
Nicole Khan, Erica Ashe, Benjamin P. Horton, Andrea Dutton, Robert E. Kopp, Gilles Brocard, Simon E. Engelhart, David F. Hill, W.R. Peltier, Christopher H. Vane, Fred N. Scatena
A new strategy for earthquake focal mechanisms using waveform-correlation-derived relative polarities and cluster analysis: Application to the 2014 Long Valley Caldera earthquake swarm A new strategy for earthquake focal mechanisms using waveform-correlation-derived relative polarities and cluster analysis: Application to the 2014 Long Valley Caldera earthquake swarm
In microseismicity analyses, reliable focal mechanisms can typically be obtained for only a small subset of located events. We address this limitation here, presenting a framework for determining robust focal mechanisms for entire populations of very small events. To achieve this, we resolve relative P and S wave polarities between pairs of waveforms by using their signed correlation...
Authors
David R. Shelly, Jeanne L. Hardebeck, William L. Ellsworth, David P. Hill
Fluid-faulting evolution in high definition: Connecting fault structure and frequency-magnitude variations during the 2014 Long Valley Caldera, California earthquake swarm Fluid-faulting evolution in high definition: Connecting fault structure and frequency-magnitude variations during the 2014 Long Valley Caldera, California earthquake swarm
An extended earthquake swarm occurred beneath southeastern Long Valley Caldera between May and November 2014, culminating in three magnitude 3.5 earthquakes and 1145 cataloged events on 26 September alone. The swarm produced the most prolific seismicity in the caldera since a major unrest episode in 1997-1998. To gain insight into the physics controlling swarm evolution, we used large...
Authors
David R. Shelly, William L. Ellsworth, David P. Hill
Long Valley caldera and the UCERF depiction of Sierra Nevada range-front faults Long Valley caldera and the UCERF depiction of Sierra Nevada range-front faults
Long Valley caldera lies within a left-stepping offset in the north-northwest-striking Sierra Nevada range-front normal faults with the Hilton Creek fault to the south and Hartley Springs fault to the north. Both Uniform California Earthquake Rupture Forecast (UCERF) 2 and its update, UCERF3, depict slip on these major range-front normal faults as extending well into the caldera, with...
Authors
David P. Hill, Emily K. Montgomery-Brown
Renewed inflation of Long Valley Caldera, California (2011 to 2014) Renewed inflation of Long Valley Caldera, California (2011 to 2014)
Slow inflation began at Long Valley Caldera in late 2011, coinciding with renewed swarm seismicity. Ongoing deformation is concentrated within the caldera. We analyze this deformation using a combination of GPS and InSAR (TerraSAR-X) data processed with a persistent scatterer technique. The extension rate of the dome-crossing baseline during this episode (CA99 to KRAC) is 1 cm/yr...
Authors
Emily Montgomery-Brown, Charles W. Wicks, Peter F. Cervelli, John O. Langbein, Jerry L. Svarc, David R. Shelly, David P. Hill, Michael Lisowski
On the sensitivity of transtensional versus transpressional tectonic regimes to remote dynamic triggering by Coulomb failure On the sensitivity of transtensional versus transpressional tectonic regimes to remote dynamic triggering by Coulomb failure
Accumulating evidence, although still strongly spatially aliased, indicates that although remote dynamic triggering of small-to-moderate (Mw
Authors
David P. Hill
Science and Products
Filter Total Items: 65
Drivers of Holocene sea-level change in the Caribbean Drivers of Holocene sea-level change in the Caribbean
We present a Holocene relative sea-level (RSL) database for the Caribbean region (5°N to 25°N and 55°W to 90°W) that consists of 499 sea-level index points and 238 limiting dates. The database was compiled from multiple sea-level indicators (mangrove peat, microbial mats, beach rock and acroporid and massive corals). We subdivided the database into 20 regions to investigate the influence...
Authors
Nicole Khan, Erica Ashe, Benjamin P. Horton, Andrea Dutton, Robert E. Kopp, Gilles Brocard, Simon E. Engelhart, David F. Hill, W.R. Peltier, Christopher H. Vane, Fred N. Scatena
A new strategy for earthquake focal mechanisms using waveform-correlation-derived relative polarities and cluster analysis: Application to the 2014 Long Valley Caldera earthquake swarm A new strategy for earthquake focal mechanisms using waveform-correlation-derived relative polarities and cluster analysis: Application to the 2014 Long Valley Caldera earthquake swarm
In microseismicity analyses, reliable focal mechanisms can typically be obtained for only a small subset of located events. We address this limitation here, presenting a framework for determining robust focal mechanisms for entire populations of very small events. To achieve this, we resolve relative P and S wave polarities between pairs of waveforms by using their signed correlation...
Authors
David R. Shelly, Jeanne L. Hardebeck, William L. Ellsworth, David P. Hill
Fluid-faulting evolution in high definition: Connecting fault structure and frequency-magnitude variations during the 2014 Long Valley Caldera, California earthquake swarm Fluid-faulting evolution in high definition: Connecting fault structure and frequency-magnitude variations during the 2014 Long Valley Caldera, California earthquake swarm
An extended earthquake swarm occurred beneath southeastern Long Valley Caldera between May and November 2014, culminating in three magnitude 3.5 earthquakes and 1145 cataloged events on 26 September alone. The swarm produced the most prolific seismicity in the caldera since a major unrest episode in 1997-1998. To gain insight into the physics controlling swarm evolution, we used large...
Authors
David R. Shelly, William L. Ellsworth, David P. Hill
Long Valley caldera and the UCERF depiction of Sierra Nevada range-front faults Long Valley caldera and the UCERF depiction of Sierra Nevada range-front faults
Long Valley caldera lies within a left-stepping offset in the north-northwest-striking Sierra Nevada range-front normal faults with the Hilton Creek fault to the south and Hartley Springs fault to the north. Both Uniform California Earthquake Rupture Forecast (UCERF) 2 and its update, UCERF3, depict slip on these major range-front normal faults as extending well into the caldera, with...
Authors
David P. Hill, Emily K. Montgomery-Brown
Renewed inflation of Long Valley Caldera, California (2011 to 2014) Renewed inflation of Long Valley Caldera, California (2011 to 2014)
Slow inflation began at Long Valley Caldera in late 2011, coinciding with renewed swarm seismicity. Ongoing deformation is concentrated within the caldera. We analyze this deformation using a combination of GPS and InSAR (TerraSAR-X) data processed with a persistent scatterer technique. The extension rate of the dome-crossing baseline during this episode (CA99 to KRAC) is 1 cm/yr...
Authors
Emily Montgomery-Brown, Charles W. Wicks, Peter F. Cervelli, John O. Langbein, Jerry L. Svarc, David R. Shelly, David P. Hill, Michael Lisowski
On the sensitivity of transtensional versus transpressional tectonic regimes to remote dynamic triggering by Coulomb failure On the sensitivity of transtensional versus transpressional tectonic regimes to remote dynamic triggering by Coulomb failure
Accumulating evidence, although still strongly spatially aliased, indicates that although remote dynamic triggering of small-to-moderate (Mw
Authors
David P. Hill
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