Seismic events in the USA in 1972

Technical Report · Thu Jun 01 04:00:00 EDT 1978

OSTI ID:5728189

Israelson, H; Basham, P; Elvers, E; Slunga, R; Dahlman, O

In all 268 events were defined, 260 of which were reported by the National Oceanic and Atmospheric Administration in USA. The other 8 events, all located near the Nevada Test Site (NTS), were obtained using data acquired at Canadian, North European, and USA seismological stations. A hypocenter estimation model was developed for precise location of events close to borders and shorelines. The set of defined events is believed to be almost complete down to a body wave magnitude, m /sub b/, around 4. Criteria based on reordings of the Canadian Seismograph Network, the Hagfors Observatory in Sweden, and two VLPE stations in the USA were used for identification of the events. An identification model using m/sub b/ (M /sub s/)-data at several stations was developed for the particular type of m/sub b/ (M /sub s)-data of the study. The model was designed to ultize upper bound estimates of M /sub s/. A screening procedure for event identification was designed from observations of explosions and earthquakes independent of the 1972 data.

• Research Organization: National Defense Univ., Washington, DC (USA). Research Directorate
• OSTI ID: 5728189
• Report Number(s): N-79-17404
• Country of Publication: United States
• Language: English

Related Subjects

58 GEOSCIENCES
580201* -- Geophysics-- Seismology & Tectonics-- (1980-1989)
DATA FORMS
EARTHQUAKES
EXPLOSIONS
MEASURING INSTRUMENTS
NORTH AMERICA
NUCLEAR EXPLOSIONS
SEISMIC ARRAYS
SEISMIC DETECTORS
SEISMIC EVENTS
SEISMIC WAVES
SEISMOGRAPHS
TABLES
USA