LOCAL SEISMIC MONITORING.

Four, low-power, portable seismographs were constructed. From August 1964 to October 1965, these seismographs were used to record local seismic activity in eight geographical areas in the conterminous U.S. and seismic signals at regional distances from the LONG SHOT explosion in Alaska. The resultin...

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Bibliographic Details
Main Authors: Westphal, Warren H., Lange, Arthur L.
Other Authors: STANFORD RESEARCH INST MENLO PARK CA
Format: Text
Language:English
Published: 1966
Subjects:
Seismology
(*NUCLEAR EXPLOSIONS
ALASKA)
(*SEISMIC WAVES
UNITED STATES)
UNDERGROUND EXPLOSIONS
SHOCK WAVES
MICROSEISMS
INTENSITY
EARTHQUAKES
SEISMOGRAPHS
PORTABLE EQUIPMENT
FAULTS(GEOLOGY)
STRUCTURAL GEOLOGY
EPICENTERS
ARIZONA
NEVADA
CALIFORNIA
UTAH
OREGON
DETECTION
NETWORKS
COMPUTER PROGRAMMING
ALEUTIAN ISLANDS
MONITORS
LONG SHOT
Alaska
Aleutian Islands
Online Access:http://www.dtic.mil/docs/citations/AD0484051
http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=AD0484051
Description
Summary:Four, low-power, portable seismographs were constructed. From August 1964 to October 1965, these seismographs were used to record local seismic activity in eight geographical areas in the conterminous U.S. and seismic signals at regional distances from the LONG SHOT explosion in Alaska. The resulting data indicated that most seismic activity can be related to specific geologic structures and that the level of the activity is quite variable in time. Periods of activity in a specific geologic structure are usually accompanied by higher magnitude (4-5) earthquakes. Aftershock sequences of these larger magnitude shocks, at least in three cases observed in western Nevada, appear to terminate within a few hours or at the most a few days after the main shock.

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