Publications
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History and pre-history of earthquakes in wine and redwood country, Sonoma and Mendocino counties, California History and pre-history of earthquakes in wine and redwood country, Sonoma and Mendocino counties, California
No abstract available.
Authors
Suzanne Hecker, Harvey Kelsey
Possible deep-water gas hydrate accumulations in the Bering Sea Possible deep-water gas hydrate accumulations in the Bering Sea
Seismic reflection images from the deep-water Aleutian and Bowers Basins of the Bering Sea contain many hundreds of acoustic Velocity-AMPlitude (VAMP) anomalies, each of which may represent a large accumulation of natural gas hydrate. Against a backdrop of essentially horizontal sedimentary reflections, the VAMP anomalies stand out as both high-amplitude bright spots and zones of...
Authors
Ginger A. Barth, David W. Scholl, Jonathan R. Childs
The San Andreas fault on the San Francisco peninsula The San Andreas fault on the San Francisco peninsula
This field trip consists of stops in four locations that provide insight into the San Andreas fault along the San Francisco peninsula. The first two stops provide an overview and close-up look at the fault where no urbanization has occurred. The last two stops are examples of areas where urbanization occurred directly over the fault prior to current regulations. The field trip also...
Authors
Carol S. Prentice, Greg W. Bartow, N. Timothy Hall, Michele Liapes
On the mechanical work absorbed on faults during earthquake ruptures On the mechanical work absorbed on faults during earthquake ruptures
No abstract available.
Authors
M. Cocco, Paul A. Spudich, Elisa Tinti
Development of the Moon Development of the Moon
No abstract available.
Authors
Michael B. Duke, Lisa R. Gaddis, G. Jeffrey Taylor, Harrison H. Schmitt
Identifying the effects of petrologic processes in a closed basaltic system using trace element concentrations in olivines and glasses: Implications for comparative planetology Identifying the effects of petrologic processes in a closed basaltic system using trace element concentrations in olivines and glasses: Implications for comparative planetology
We use trace-element concentrations in olivines and glasses from a closed basaltic system to identify the effects of petrologic processes on the trace-element record of that system. The closed basaltic system in question is the Makaopuhi Lava Lake (MLL), which is closed with respect to magma mixing. Detailed studies of this lava lake have provided important information about system...
Authors
Justin Hagerty, Charles K. Shearer, David Vaniman, Paul V. Burger
The San Andreas fault in Sonoma and Mendocino counties The San Andreas fault in Sonoma and Mendocino counties
This two-day trip explores the northern San Andreas fault in the Gualala area between Fort Ross and Point Arena (Fig. 1). The first stop overlooks the Golden Gate Bridge and includes a discussion of its in-progress seismic retrofit. Several subsequent stops are at paleoseismic sites on the San Andreas fault. The stop at Annapolis Road includes a short hike along the fault through the...
Authors
Carol S. Prentice, Keith I. Kelson
Source scaling telationships of microearthquakes at Parkfield, CA, determined using the SAFOD pilot hole seismic array Source scaling telationships of microearthquakes at Parkfield, CA, determined using the SAFOD pilot hole seismic array
Weestimate thesourceparametersof34microearthquakes at Parkfield,CA,ranginginsizefromM-0.2 toM2.1, byanalyzingseismogramsrecorded bythe32-level, 3-componentseismic arrayinstalled in theSAFODPilotHole. Wesucceeded in obtainingstablespectral ratios by stacking theratioscalculatedfromthemovingwindowstakenalongtherecordfollowingthedirectwaves.Thesespectral ratios were modeledtodetermine...
Authors
Kazutoshi Imanishi, William L. Ellsworth
Earthquake Trail, Sanborn County Park: A geology hike along the San Andreas fault Earthquake Trail, Sanborn County Park: A geology hike along the San Andreas fault
On the southern part of the San Francisco Peninsula, the San Andreas fault traverses the actively uplifting Santa Cruz Mountains. The field guide is comprised of a hiking tour along the fault in Sanborn County fault, a visit to a winery and vineyards traversed by the fault, and visits to two wineries that provide vistas of the San Andreas Rift Valley and surroundings.
Authors
Philip W. Stoffer
Forecasting runout of rock and debris avalanches Forecasting runout of rock and debris avalanches
Physically based mathematical models and statistically based empirical equations each may provide useful means of forecasting runout of rock and debris avalanches. This paper compares the foundations, strengths, and limitations of a physically based model and a statistically based forecasting method, both of which were developed to predict runout across three-dimensional topography. The...
Authors
Richard M. Iverson
The 2005 La Conchita, California, landslide The 2005 La Conchita, California, landslide
[No abstract available]
Authors
R.W. Jibson