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Seafloor studies of Mamala Bay, Honolulu, Hawaii Seafloor studies of Mamala Bay, Honolulu, Hawaii

No comprehensive study of the effects of disposal of dredge spoils has been conducted to determine if the environment has suffered. The U.S. Army Corps of Engineers (USACE) has regularly dredged the shipping channels of Honolulu Harbor and Pearl Harbor for commercial and military purposes. The 5-year frequency for new dredging activity has led to the formation of extensive offshore wide...
Authors
Michael E. Torresan

No: The L.A. array is not ready for prime time No: The L.A. array is not ready for prime time

Although much interest will focus upon the temporal behavior of observed deformation, the principal justification for the SCIGN array is that within a 5‐year interval it will provide an accurate and detailed determination of the velocity field in the Los Angeles basin that can be used to identify the active faults and estimate their secular slip rates. Obviously, the accuracy of the...
Authors
James C. Savage

Geographic relations of landslide distribution and assessment of landslide hazards in the Blanco, Cibuco, and Coamo basins, Puerto Rico Geographic relations of landslide distribution and assessment of landslide hazards in the Blanco, Cibuco, and Coamo basins, Puerto Rico

Landslide occurrence is common in mountainous areas of Puerto Rico where mean annual rainfall and the frequency of intense storms are high and hillslopes are steep. Each year, landslides cause extensive damage to property and occasionally result in loss of life. Landslide maps developed from 1:20,000 scale aerial photographs in combination with a computerized geographic information...
Authors
M. C. Larsen, A. J. Torres-Sanchez

New trends in active faulting studies for seismic hazard assessment New trends in active faulting studies for seismic hazard assessment

No abstract available.
Authors
Enzo Boschi, D. Giardini, D. Pantosti, Gianluca Valensise, Ramon Arrowsmith, Peter W. Basham, R. Burgmann, Anthony J. Crone, Alan Hull, Robin K. McGuire, David Schwartz, Kerry Sieh, Steven N Ward, Robert S. Yeats

Some facts about aftershocks to large earthquakes in California Some facts about aftershocks to large earthquakes in California

Earthquakes occur in clusters. After one earthquake happens, we usually see others at nearby (or identical) locations. To talk about this phenomenon, seismologists coined three terms foreshock , mainshock , and aftershock. In any cluster of earthquakes, the one with the largest magnitude is called the mainshock; earthquakes that occur before the mainshock are called foreshocks while...
Authors
Lucile M. Jones, Paul A. Reasenberg
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