| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
|
|
|
|||||||
|
|||||||||
SEISMOGRAPHIC STATION DEPARTMENT OF GEOLOGY AND GEOPHYSICS UNIVERSITY OF CALIFORNIA, BERKELEY, CALIFORNIA 94720
EARTH SCIENCES DIVISION LAWRENCE BERKELEY LABORATORY UNIVERSITY OF CALIFORNIA, BERKELEY, CALIFORNIA 94720
Abstract
ASP, a low-power, in-field Automated Seismic Processor of microearthquake network data has been designed, fabricated, and deployed for initial operation in four different field areas to monitor seismicity associated with two geothermal areas (The Geysers, California, and Cerro Prieto, Mexico), a nuclear explosion with its related collapse and aftershock sequence, and late (>1 year) activity in a major aftershock series (Livermore, California). A second ASP system, with a high-speed front-end, is used in acoustic emission (1 to 20 kHz) analysis for fracture monitoring. Each of the 15 channels of ASP (configured for up to 128 channels) automatically detects, measures times and amplitudes, and computes and fits FFT's for both the P and S waves on data sampled at 100 samples/sec. These data from each channel are then processed with a central microprocessor for hypocenter location, running b values, source parameters, event count, and P-wave polarities. The system is capable of processing a 15-station detection in approximately 40 sec, excluding printout. The initial trials have demonstrated that in-field real-time analysis of data maximizes the efficiency of microearthquake surveys allowing flexibility in experimental procedures, with a minimum of the traditional labor-intensive postprocessing. Current efforts are directed toward improving efficiency of computation and data output and in expanding software capabilities.
This article has been cited by other articles:
|
|
 |
|
  Moment Magnitude Determination for Local and Regional Earthquakes Based on Source Spectra Bulletin of the Seismological Society of America, February 1, 2003; 93(1): 203 - 214.
|
|
|
|
|
|
Y.-M. Wu, T.-C. Shin, and Y.-B. Tsai Quick and reliable determination of magnitude for seismic early warning Bulletin of the Seismological Society of America, October 1, 1998; 88(5): 1254 - 1259. [Abstract] [PDF]
|
|
|
|
|
|
P. S. Earle and P. M. Shearer Characterization of global seismograms using an automatic-picking algorithm Bulletin of the Seismological Society of America, April 1, 1994; 84(2): 366 - 376. [Abstract] [PDF]
|
|
|
|
|
|
A. F. PRUGGER and D. J. GENDZWILL Microearthquake location: A nonlinear approach that makes use of a simplex stepping procedure Bulletin of the Seismological Society of America, April 1, 1988; 78(2): 799 - 815. [Abstract] [PDF]
|
|
|
|
|
|
M. BAER and U. KRADOLFER An automatic phase picker for local and teleseismic events Bulletin of the Seismological Society of America, August 1, 1987; 77(4): 1437 - 1445. [Abstract] [PDF]
|
|
|
|
|
|
N. MAGOTRA, N. AHMED, and E. CHAEL Seismic event detection and source location using single-station (three-component) data Bulletin of the Seismological Society of America, June 1, 1987; 77(3): 958 - 971. [Abstract] [PDF]
|
|
|
|
|
|
K. R. GLEDHILL and M. J. RANDALL Snare: An earthquake detection and recording system for small seismograph networks Bulletin of the Seismological Society of America, October 1, 1986; 76(5): 1485 - 1489. [PDF]
|
|
|
|
|
|
S. MYKKELTVEIT and H. BUNGUM Processing of regional seismic events using data from small-aperture arrays Bulletin of the Seismological Society of America, December 1, 1984; 74(6): 2313 - 2333. [Abstract] [PDF]
|
|
|
|
|
|
R. ALLEN Automatic phase pickers: Their present use and future prospects Bulletin of the Seismological Society of America, December 1, 1982; 72(6B): S225 - S242. [Abstract] [PDF]
|
|
| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
