Publications
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Shear-rate-dependent strength control on the dynamics of rainfall-triggered landslides, Tokushima Prefecture, Japan
A typhoon (Typhoon No. 10) attacked Shikoku Island and the Tyugoku area of Japan in 2004. This typhoon produced a new daily precipitation record of 1317 mm on Shikoku Island and triggered hundreds of landslides in Tokushima Prefecture. One catastrophic landslide was triggered in the Shiraishi area of Kisawa village, and destroyed more than 10 houses while also leaving an unstable block high on the
Authors
G. Wang, A. Suemine, W.H. Schulz
OMG earthquake! can twitter improve earthquake response?
[No abstract available]
Authors
P. Earle, M. Guy, R. Buckmaster, C. Ostrum, S. Horvath, A. Vaughan
Predicting the probability and volume of postwildfire debris flows in the intermountain western United States
Empirical models to estimate the probability of occurrence and volume of postwildfire debris flows can be quickly implemented in a geographic information system (GIS) to generate debris-flow hazard maps either before or immediately following wildfires. Models that can be used to calculate the probability of debris-flow production from individual drainage basins in response to a given storm were de
Authors
S.H. Cannon, J.E. Gartner, M.G. Rupert, J. A. Michael, A. H. Rea, C. Parrett
Time-dependent seismic tomography
Of methods for measuring temporal changes in seismic-wave speeds in the Earth, seismic tomography is among those that offer the highest spatial resolution. 3-D tomographic methods are commonly applied in this context by inverting seismic wave arrival time data sets from different epochs independently and assuming that differences in the derived structures represent real temporal variations. This a
Authors
B. R. Julian, G. R. Foulger
Computer algorithm for analyzing and processing borehole strainmeter data
The newly installed Plate Boundary Observatory (PBO) strainmeters record signals from tectonic activity, Earth tides, and atmospheric pressure. Important information about tectonic processes may occur at amplitudes at and below tidal strains and pressure loading. If incorrect assumptions are made regarding the background noise in the strain data, then the estimates of tectonic signal amplitudes ma
Authors
John O. Langbein
First high-resolution stratigraphic column of the Martian north polar layered deposits
This study achieves the first high-spatial-resolution, layer-scale, measured stratigraphic column of the Martian north polar layered deposits using a 1m-posting DEM. The marker beds found throughout the upper North Polar Layered Deposits range in thickness from 1.6 m-16.0 m +/-1.4 m, and 6 of 13 marker beds are separated by ???25-35 m. Thin-layer sets have average layer separations of 1.6 m. These
Authors
K.E. Fishbaugh, C.S. Hvidberg, S. Byrne, P.S. Russell, Kenneth E. Herkenhoff, M. Winstrup, R. Kirk
Ground motion hazard from supershear rupture
An idealized rupture, propagating smoothly near a terminal rupture velocity, radiates energy that is focused into a beam. For rupture velocity less than the S-wave speed, radiated energy is concentrated in a beam of intense fault-normal velocity near the projection of the rupture trace. Although confined to a narrow range of azimuths, this beam diverges and attenuates. For rupture velocity greater
Authors
D. J. Andrews
Seismic hazard mapping of California considering site effects
In this paper, we have combined the U.S. Geological Survey's National Seismic Hazard Maps model with the California geologic map showing 17 generalized geologic units that can be defined by their VS30. We regrouped these units into seven VS30 values and calculated a probabilistic seismic hazard map for the entire state for each VS30 value. By merging seismic hazard maps based on the seven differen
Authors
E. Kalkan, C.J. Wills, D.M. Branum
Satellite observations of a surtseyan eruption: Hunga Ha'apai, Tonga
On March 17, 2009, a surtseyan eruption occurred around Hunga Ha'apai Island, Tonga. A series of observations from the high-spatial resolution Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER), and the high-temporal resolution Moderate Resolution Imaging Spectroradiometer (MODIS), was used to estimate the magnitude, location, start time, and duration of the eruption, and measu
Authors
R. Greg Vaughan, Peter W. Webley
Migrating tremors illuminate complex deformation beneath the seismogenic San Andreas fault
The San Andreas fault is one of the most extensively studied faults in the world, yet its physical character and deformation mode beneath the relatively shallow earthquake-generating portion remain largely unconstrained. Tectonic ‘non-volcanic’ tremor, a recently discovered seismic signal probably generated by shear slip on the deep extension of some major faults, can provide new insight into the
Authors
David R. Shelly
Imaging hydraulic fractures in a geothermal reservoir
No abstract available.
Authors
Bruce R. Julian, Gillian R. Foulger
Surface-wave potential for triggering tectonic (nonvolcanic) tremor
Source processes commonly posed to explain instances of remote dynamic triggering of tectonic (nonvolcanic) tremor by surface waves include frictional failure and various modes of fluid activation. The relative potential for Love- and Rayleigh-wave dynamic stresses to trigger tectonic tremor through failure on critically stressed thrust and vertical strike-slip faults under the Coulomb-Griffith fa
Authors
D. P. Hill