Quick
Search: 		  
advanced search
 GSW Home   GeoRef Home   My GSW Alerts   Contact GSW   About GSW   Journals List   Help 
Bulletin of the Seismological Society of America Don't get GSW? Talk to your librarian.
JOURNAL HOME HELP CONTACT PUBLISHER SUBSCRIBE ARCHIVE SEARCH TABLE OF CONTENTS
Bulletin of the Seismological Society of America; February 1976; v. 66; no. 1; p. 61-80
© 1976 Seismological Society of America
This Article
Right arrow Full Text (PDF)
Right arrow References
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
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
Right arrow reprints & permissions
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by STEVENSON, P. R.
Right arrow Search for Related Content
GeoRef
Right arrow GeoRef Citation

Microearthquakes at Flathead Lake, Montana: A study using automatic earthquake processing

PETER R. STEVENSON

U.S. GEOLOGICAL SURVEY, 345 MIDDLEFIELD ROAD, MENLO PARK, CALIFORNIA 94025

Abstract

A nine-station portable seismic net, 50 km in diameter, was operated for 50 days in late 1971 near Flathead Lake, Montana at the juncture of the southern extension of the Rocky Mountain trench and the northern section of the Intermountain Seismic Belt. During the time the net was in operation, 259 locatable earthquakes ranging in coda magnitude from 0.1 to 3.3 were recorded. The earthquakes fall in two source regions approximately 15 km apart. In the northern region, the focal depths average 5 km, while those in the southern region range from 5 to 12 km. During part of the recording period, the activity in the southern region defined a planar zone striking north-northwest with a dip of 70° to the east-northeast. The better-defined fault-plane solutions in the region suggest northsouth compression. A procedure for automatically picking the first arrivals with a computer was used in analyzing the data.




This article has been cited by other articles:


Home page
 Bulletin of the Seismological Society of AmericaHome page
M. C. STICKNEY and M. J. BARTHOLOMEW
Seismicity and late Quaternary faulting of the northern basin and range province, Montana and Idaho
Bulletin of the Seismological Society of America, October 1, 1987; 77(5): 1602 - 1625.
[Abstract] [PDF]

Home page
 Bulletin of the Seismological Society of AmericaHome page
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]

Home page
 Bulletin of the Seismological Society of AmericaHome page
A. QAMAR, J. KOGAN, and M. C. STICKNEY
Tectonics and recent seismicity near Flathead Lake, Montana
Bulletin of the Seismological Society of America, October 1, 1982; 72(5): 1591 - 1599.
[Abstract] [PDF]

Home page
 Bulletin of the Seismological Society of AmericaHome page
R. V. ALLEN
Automatic earthquake recognition and timing from single traces
Bulletin of the Seismological Society of America, October 1, 1978; 68(5): 1521 - 1532.
[Abstract] [PDF]

Home page
 Bulletin of the Seismological Society of AmericaHome page
S. W. STEWART
Real-time detection and location of local seismic events in central California
Bulletin of the Seismological Society of America, April 1, 1977; 67(2): 433 - 452.
[Abstract] [PDF]

Home page
 Bulletin of the Seismological Society of AmericaHome page
A. M. ROGERS and W. H. K. LEE
Seismic study of earthquakes in the Lake Mead, Nevada-Arizona region
Bulletin of the Seismological Society of America, October 1, 1976; 66(5): 1657 - 1681.
[Abstract] [PDF]


JOURNAL HOME HELP CONTACT PUBLISHER SUBSCRIBE ARCHIVE SEARCH TABLE OF CONTENTS
Copyright © 2009 by Seismological Society of America