Bulletin of the Seismological Society of America
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
QUICK SEARCH:   [advanced]


     

Bulletin of the Seismological Society of America; February 1993; v. 83; no. 1; p. 190-217
© 1993 Seismological Society of America
This Article
Right arrow Full Text (PDF)
Right arrow References
Right arrow Citation Map
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by WILLOUGHBY, D. F.
Right arrow Articles by HORWITT, D.
Right arrow Search for Related Content
GeoRef
Right arrow GeoRef Citation

A microprocessor-based ocean-bottom seismometer

DAVID F. WILLOUGHBY, JOHN A. ORCUTT and DAVID HORWITT

INSTITUTE OF GEOPHYSICS AND PLANETARY PHYSICS SCRIPPS INSTITUTION OF OCEANOGRAPHY, LAJOLLA, CALIFORNIA 92093

Abstract

For over 12 years, the Scripps Institution of Oceanography has operated a fleet of microprocessor-based ocean-bottom seismometers. These instruments free-fall to the seafloor and release their anchors and rise to the surface either at preset times or on receipt of an acoustic command. The instruments are contained in a single spherical pressure case and include geophones with a 1-Hz natural period, and differential pressure gauges responsive to acoustic signals between 0.003 and 30 Hz.

Recent improvements described in detail here include the implementation of a C-44 bus 80C88 microprocessor and cassette recorders capable of storing up to 10 days of data digitized at 128 samples/sec, or 40 days at 32 samples/sec. In addition, tiltmeters have been installed in the instruments.

Serial links to the processor and release timers provide for instrument checkout and the setting of time and data parameters from outside the pressure case. A portable laboratory also described here is used to prepare the instruments for deployment at sea.




This article has been cited by other articles:


Home page
 Bulletin of the Seismological Society of AmericaHome page
M. A. Riedesel, J. A. Orcutt, and J. A. Adams
Seismic signals and noise recorded on a seafloor vertical hydrophone array and a colocated OBS during the LFASE experiment
Bulletin of the Seismological Society of America, April 1, 1999; 89(2): 423 - 432.
[Abstract] [PDF]

Home page
 ScienceHome page
J. P. Canales, R. S. Detrick, S. Bazin, A. J. Harding, and J. A. Orcutt
Off-Axis Crustal Thickness Across and Along the East Pacific Rise Within the MELT Area
Science, May 22, 1998; 280(5367): 1218 - 1221.
[Abstract] [Full Text]

Home page
 Bulletin of the Seismological Society of AmericaHome page
D. K. Blackman, J. A. Orcutt, and D. W. Forsyth
Recording teleseismic earthquakes using ocean-bottom seismographs at mid-ocean ridges
Bulletin of the Seismological Society of America, December 1, 1995; 85(6): 1648 - 1664.
[Abstract] [PDF]

Home page
 Bulletin of the Seismological Society of AmericaHome page
J. M. Babcock, B. A. Kirkendall, and J. A. Orcutt
Relationships between ocean bottom noise and the environment
Bulletin of the Seismological Society of America, December 1, 1994; 84(6): 1991 - 2007.
[Abstract] [PDF]


HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
Copyright © 1993 by the Seismological Society of America.