| Abstract: | Microprocessor technology has permitted the development of a General Earthquake-Observation System (GEOS) useful for most seismic applications. Central-processing-unit control via robust software of system functions that are isolated on hardware modules permits field adaptability of the system to a wide variety of active and passive seismic experiments and straightforward modification for incorporation of improvements in technology. Various laboratory tests and numerous deployments of a set of the systems in the field have confirmed design goals, including: wide linear dynamic range (16 bit/96 dB); broad bandwidth (36 hr to 600 Hz; greater than 36 hr available); selectable sensor-type (accelerometer, seismometer, dilatometer); selectable channels (1 to 6); selectable record mode (continuous, preset, trigger); large data capacity (1. 4 to 60 Mbytes); selectable time standard (WWVB, master, manual); automatic self-calibration; simple field operation; full capability to adapt system in the field to a wide variety of experiments; low power; portability; and modest costs. System design goals for a microcomputer-controlled system with modular software and hardware components as implemented on the GEOS are presented. The systems have been deployed for 15 experiments, including: studies of near-source strong motion; high-frequency microearthquakes; crustal structure; down-hole wave propagation; teleseismicity; and earth-tidal strains. |
| Genre: | Article |
| ProdID: | 70012977 |
| Citation Author: | Borcherdt, R. D.; Fletcher, J. B.; Jensen, E. G.; Maxwell, G. L.; VanSchaack, J. R.; Warrick, R. E.; Cranswick, E.; Johnston, M. J. S.; McClearn, R. |
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| Citation End Page: | 1825 |
| Citation Issue: | 6 |
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| Citation Language: | English |
| Citation Larger Work Title: | Bulletin of the Seismological Society of America |
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| Citation Number Of Pages: | 43 |
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| Citation Search Results Text: | GENERAL EARTHQUAKE-OBSERVATION SYSTEM (GEOS).; 1985; Article; Journal; Bulletin of the Seismological Society of America; Borcherdt, R. D.; Fletcher, J. B.; Jensen, E. G.; Maxwell, G. L.; VanSchaack, J. R.; Warrick, R. E.; Cranswick, E.; Johnston, M. J. S.; McClearn, R. |
| Citation Start Page: | 1783 |
| Citation Volume: | 75 |
| Citation Year: | 1985 |
| Type: | citation/reference |
| Text: | GENERAL EARTHQUAKE-OBSERVATION SYSTEM (GEOS).; 1985; Article; Journal; Bulletin of the Seismological Society of America; Borcherdt, R. D.; Fletcher, J. B.; Jensen, E. G.; Maxwell, G. L.; VanSchaack, J. R.; Warrick, R. E.; Cranswick, E.; Johnston, M. J. S.; McClearn, R. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Tue, 1 Jan 1985 00:00 -0600 |
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