Source parameters of the 1980 Mammoth Lakes, California earthquake sequence

Journal Article · Thu Jun 10 04:00:00 EDT 1982 · J. Geophys. Res.; (United States)

DOI:https://doi.org/10.1029/JB087iB06p04595· OSTI ID:5131130

Archuleta, R J; Cranswick, E; Muller, C; Spudich, P

From the more than 1500 Mammoth Lakes earthquakes recorded on three-component digital seismographs (Spudich et al., 1981), 150 were used in an analysis of the locations, mechanism, and source parameters. A composite fault plane solution of nine earthquakes 3.9< or =M< or =5.1 defines a right-lateral strike slip mechanism on a steeply dipping nearly east-west plane striking S75 /sup 0/E or left-lateral strike slip on a nearly north-south plane striking N10 /sup 0/E. Vertical cross sections of well-located aftershocks indicate possible three east-west planes that coincide with the locations of the four largest earthquakes with M/sub L/> or =6.0. Using the spectral analysis of S waves (Brune, 1970), source parameters for 67 earthquakes were determined. Forty-eight had magnitudes greater than or equal to 3.0. Seismic moments ranges from 9.20 x 10/sup 18/ dyn cm to 2.33 x 10/sup 24/ dyn cm. Earthquakes with seismic moment greater than about 1.0 x 10/sup 21/ dyn cm had nearly constant stress drops (approx. =50 bars); earthquakes with seismic moment less than about 1.0 x 10/sup 21/ dyn cm had stress drop that apparetnly decrease as seismic moment decreases.

• Research Organization: U. S. Geological Survey, Menlo Park, California 94025
• OSTI ID: 5131130
• Journal Information: J. Geophys. Res.; (United States), Journal Name: J. Geophys. Res.; (United States) Vol. 87:B6; ISSN JGREA
• Country of Publication: United States
• Language: English

Related Subjects

58 GEOSCIENCES
580201* -- Geophysics-- Seismology &amp; Tectonics-- (1980-1989)
AFTERSHOCKS
CALIFORNIA
EARTHQUAKE MAGNITUDE
EARTHQUAKES
FEDERAL REGION IX
FOURIER ANALYSIS
NORTH AMERICA
SEISMIC EVENTS
SEISMIC S WAVES
SEISMIC WAVES
SLIP
STRESS ANALYSIS
USA