| Abstract: | A new short-period event detector has been implemented on the Seismic Research Observatories. For each signal detected, a printed output gives estimates of the time of onset of the signal, direction of the first break, quality of onset, period and maximum amplitude of the signal, and an estimate of the variability of the background noise. On the SRO system, the new algorithm runs ~2.5x faster than the former (power level) detector. This increase in speed is due to the design of the algorithm: all operations can be performed by simple shifts, additions, and comparisons (floating point operations are not required). Even though a narrow-band recursive filter is not used, the algorithm appears to detect events competitively with those algorithms that employ such filters. Tests at Albuquerque Seismological Laboratory on data supplied by Blandford suggest performance commensurate with the on-line detector of the Seismic Data Analysis Center, Alexandria, Virginia. |
| Genre: | USGS Numbered Series |
| ProdID: | 10445 |
| Citation Author: | Murdock, James N.; Hutt, Charles R. |
| Citation Contributing Office: | USGS Albuquerque Seismological Laboratory |
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| Citation Language: | ENGLISH |
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| Citation Phsyical Description: | Report: 39 p.; 5 Plates |
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| Citation Publisher: | Geological Survey (U.S.) |
| Citation Series: | Open-File Report |
| Citation Series Code: | OFR |
| Citation Series Number: | 83-785 |
| Citation Search Results Text: | A New Event Detector Designed for the Seismic Research Observatories; 1983; OFR; 83-785; Murdock, James N.; Hutt, Charles R. |
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| Citation Year: | 1983 |
| Type: | citation/reference |
| Text: | A New Event Detector Designed for the Seismic Research Observatories; 1983; OFR; 83-785; Murdock, James N.; Hutt, Charles R. |
| URL (THUMBNAIL): | http://pubs.usgs.gov/of/1983/0785/report-thumb.jpg |
| URL (DOCUMENT): | http://earthquake.usgs.gov/regional/asl/pubs/files/ofr83-785.pdf |
| URL (DOCUMENT): | http://pubs.usgs.gov/of/1983/0785/report.pdf |
| URL (PLATE): | http://pubs.usgs.gov/of/1983/0785/plate-1.pdf |
| URL (PLATE): | http://pubs.usgs.gov/of/1983/0785/plate-2.pdf |
| URL (PLATE): | http://pubs.usgs.gov/of/1983/0785/plate-3.pdf |
| URL (PLATE): | http://pubs.usgs.gov/of/1983/0785/plate-4.pdf |
| URL (PLATE): | http://pubs.usgs.gov/of/1983/0785/plate-5.pdf |
| Date Other: | Sat, 1 Jan 1994 00:00 -0600 |
| Publisher: | Geological Survey (U.S.) |
