Detection of regional seismic phases on the RSTN at frequencies up to 16 Hz
In an ongoing study to determine the capability of in-country seismic stations to monitor nuclear test ban treaties, the detection levels of regional earthquakes in eastern North America recorded on the Regional Seismic Test Network (RSTN) were examined over the entire bandwidth of RSTN. One hundred and nine earthquakes were chosen and ranges in magnitude from 2.0 to 5.1. Over all magnitude ranges, the detection rates were higher for all four phases (P/sub n/, P/sub g/, S/sub n/, L/sub g/) in the low frequency (< 8 Hz) than in the high frequency (> 8 Hz) band. For ranges greater than 1000 km, there are no significant arrivals at the high frequencies. P/sub n/ and S/sub n/ are the most useful phases for detection at high frequencies. P/sub g/ is useful at high frequencies for close distances. The most detections are at the lower frequencies (2-4 Hz) except for L/sub g/, which is best in the 1-2 Hz band. (ACR)
- Research Organization:
- Lawrence Livermore National Lab., CA (USA). Seismic Monitoring Research Program
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 5176138
- Report Number(s):
- UCRL-94897; CONF-860183-1; ON: DE86014442
- Country of Publication:
- United States
- Language:
- English
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58 GEOSCIENCES
580201* -- Geophysics-- Seismology & Tectonics-- (1980-1989)
DETECTION
EARTHQUAKES
EXPLOSIONS
FREQUENCY DEPENDENCE
MEASURING INSTRUMENTS
NUCLEAR EXPLOSIONS
SEISMIC ARRAYS
SEISMIC DETECTION
SEISMIC EVENTS
SEISMIC P WAVES
SEISMIC S WAVES
SEISMIC SURFACE WAVES
SEISMIC WAVES
TREATIES
VERIFICATION