Publications
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Remnant damage from the 1906 San Francisco earthquake Remnant damage from the 1906 San Francisco earthquake
This field trip consists of two stops at locations where it is possible to see damage from the 1906 earthquake and to gauge the intensity of the ground shaking that caused the damage. The first stop is at a cemetery in Colma, where the damage to monuments and headstones was photographed and roughly quantified in the Report of the State Earthquake Investigation Commission, Lawson (1908)...
Authors
John Boatwright
A field guide to the central, creeping section of the San Andreas fault and the San Andreas Fault Observatory at Depth A field guide to the central, creeping section of the San Andreas fault and the San Andreas Fault Observatory at Depth
This field trip is along the central section of the San Andreas fault and consists of eight stops that illustrate surface evidence of faulting, in general, and features associated with active fault creep, in particular. Fault creep is slippage along a fault that occurs either in association with small-magnitude earthquakes or without any associated large-magnitude earthquakes. Another...
Authors
Michael J. Rymer, Stephen H. Hickman, Philip W. Stoffer
Constraining rates and trends of historical wetland loss, Mississippi River Delta Plain, south-central Louisiana Constraining rates and trends of historical wetland loss, Mississippi River Delta Plain, south-central Louisiana
The timing, magnitude, and rate of wetland loss were described for five wetland-loss hotspots in the Terrebonne Basin of the Mississippi River delta plain. Land and water areas were mapped for 34 dates between 1956 and 2004 from historical National Wetlands Inventory (NWI) datasets, aerial photographs, and Landsat Thematic Mapper (TM) satellite images. Since 1956, the emergent land area...
Authors
Julie Bernier, Robert A. Morton, John A. Barras
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