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Title: New York/New Jersey regional seismic network

Lamont-Doherty Geological Observatory (L-DGO) continued operating a 31-station seismic network covering parts of New York and New Jersey. The network is being transformed into sub-networks with stations radio telemetered to smart'' recording stations. The sub-network approach is capable of providing improved data at reduced cost. The major research effort during the period of this report was centered about the Saguenay earthquake sequence in Quebec. L-DGO collaborated with the Canadian Geologic Survey in monitoring aftershocks with temporary local stations. Analysis of data from the 1985 Ardsley earthquake in Westchester county continued with a Green's function deconvolution approach to resolve the dimensions of the rupture of the main shock (Mb=4.0) and of the largest aftershock (Mb=3.0). The results corroborate the 1/2-1 km diameter inferred for the rupture and suggest that the segmentation of the Dobbs Ferry fault and of similar in the Manhattan Prong may be controlling the size of historic earthquakes in the New York City region. Finally, a portable seismograph survey was carried out in Palco, Kansas, which showed clearly that seismicity at Palco was induced. 51 refs,, 8 figs., 2 tabs.
Authors:
; ; ;  [1]
  1. (Columbia Univ., Palisades, NY (United States). Lamont-Doherty Geological Observatory)
Publication Date:
OSTI Identifier:
5053226
Report Number(s):
NUREG/CR-5778-Vol.1
ON: TI92000240
Resource Type:
Technical Report
Research Org:
Nuclear Regulatory Commission, Washington, DC (United States). Div. of Engineering; Columbia Univ., Palisades, NY (United States). Lamont-Doherty Geological Observatory
Sponsoring Org:
NRC; Nuclear Regulatory Commission, Washington, DC (United States)
Country of Publication:
United States
Language:
English
Subject:
58 GEOSCIENCES; 47 OTHER INSTRUMENTATION; 99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE; EARTHQUAKES; MONITORING; NEW JERSEY; SEISMIC ARRAYS; NEW YORK; AFTERSHOCKS; ATTENUATION; BUDGETS; COMMUNICATIONS; COST; GREEN FUNCTION; INFORMATION SYSTEMS; KANSAS; MATHEMATICAL MODELS; MODIFICATIONS; PROGRESS REPORT; QUEBEC; SEISMIC DETECTION; SEISMIC EVENTS; SEISMIC SURVEYS; SEISMIC WAVES; SEISMICITY; SEISMOGRAPHS; SIGNALS; STRESSES; CANADA; DETECTION; DEVELOPED COUNTRIES; DOCUMENT TYPES; FEDERAL REGION II; FEDERAL REGION VII; FUNCTIONS; GEOPHYSICAL SURVEYS; MEASURING INSTRUMENTS; NORTH AMERICA; SEISMIC DETECTORS; SURVEYS; USA 580000* -- Geosciences; 440700 -- Geophysical & Meteorological Instrumentation-- (1990-); 990300 -- Information Handling