scholarly journals Stress drop validation and triggering process of foreshocks in Southern California

2021 ◽  
Author(s):  
Xiaowei Chen ◽  
Qimin Wu
Keyword(s):  
Stress Drop ◽  
Southern California ◽  
Triggering Process

scholarly journals Stress-drop heterogeneity within tectonically complex regions: a case study of San Gorgonio Pass, southern California

2015 ◽  
Vol 202 (1) ◽  
pp. 514-528 ◽  
Author(s):  
T.H.W. Goebel ◽  
E. Hauksson ◽  
P.M. Shearer ◽  
J.P. Ampuero
Keyword(s):  
Stress Drop ◽  
Southern California

scholarly journals Seismicity and stress-drop in the Eastern Transverse Ranges, southern California

1996 ◽  
Vol 23 (3) ◽  
pp. 233-236 ◽  
Author(s):  
Laura E. Jones ◽  
Donald V. Helmberger
Keyword(s):  
Stress Drop ◽  
Southern California ◽  
Transverse Ranges

scholarly journals Determination of rupture duration and stress drop for earthquakes in southern California

1983 ◽  
Vol 73 (6A) ◽  
pp. 1527-1551
Author(s):  
Arthur Frankel ◽  
Hiroo Kanamori
Keyword(s):  
Stress Drop ◽  
Pulse Width ◽  
Southern California ◽  
Main Shock ◽  
P Wave ◽  
Fault System ◽  
Zero Crossing ◽  
Main Shocks ◽  
Seismic Networks ◽  
Rupture Duration

Abstract A simple technique is developed for determining the rupture duration and stress drop of earthquakes between magnitudes 3.5 and 4.0 using the time between the P-wave onset and the first zero crossing (τ1/2) on seismograms from local seismic networks. This method is applied to 10 main shocks in southern California to investigate regional variations in stress drop. The initial pulse widths of 65 foreshocks or aftershocks of these events were measured. Values of τ1/2 for small earthquakes below about magnitude 2.2 are generally observed to remain constant with decreasing magnitude in four sequences studied. The relative pulse width of a particular main shock (M ≧ 3.5) at a given station is found to be correlated with the relative pulse width of its aftershocks recorded at that station. These observations are interpreted to signify that the waveforms of these small events (M ≦ 2.2) are essentially the impulse response of the path between the source and receiver. Values of τ1/2 determined from small foreshocks and aftershocks are, therefore, subtracted (in effect deconvolved) from those of each main shock to obtain an estimate of the rupture duration of the main shock which is corrected for path effects. Significant variations in rupture duration and stress drop are observed for the main shocks studied. Aftershock locations and azimuthal variations in τ1/2 both indicate that the rupture zone of one earthquake expanded unilaterally. A factor of 10 variation in stress drop is calculated for two adjacent events of similar seismic moments occurring 1 hr apart on the San Jacinto fault system. The first event in this pair had the highest stress drop of the events studied (860 bars) and was followed within 8 months by a magnitude 5.5 earthquake 2 km away.

The Effects of Presentation on Noise and Dental Appliances on Speech

1981 ◽  
Vol 24 (1) ◽  
pp. 151-151
Author(s):  
Lillian Glass ◽  
Sharon R. Garber ◽  
T. Michael Speidel ◽  
Gerald M. Siegel ◽  
Edward Miller
Keyword(s):  
Southern California ◽  
University Of Southern California ◽  
University Of Minnesota ◽  
School Of Medicine ◽  
Southern California School ◽  
School Of Dentistry ◽  
The University

An omission in the Table of Contents, December JSHR, has occurred. Lillian Glass, Ph.D., at the University of Southern California School of Medicine and School of Dentistry, was a co-author of the article "The Effects of Presentation on Noise and Dental Appliances on Speech" along with Sharon R. Garber, T. Michael Speidel, Gerald M. Siegel, and Edward Miller of the University of Minnesota, Minneapolis.

Patiens of infectious diarrhea peaks in Southern California

2001 ◽  
Vol 120 (5) ◽  
pp. A215-A216
Author(s):  
C CONTEAS ◽  
J PRUTHI ◽  
R BURCHETTE
Keyword(s):  
Southern California ◽  
Infectious Diarrhea
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