HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) References Citation Map Services Email this article to a friend Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by QAMAR, A. Articles by STICKNEY, M. C. Search for Related Content GeoRef GeoRef Citation

Tectonics and recent seismicity near Flathead Lake, Montana

DEPARTMENT OF GEOLOGY UNIVERSITY OF MONTANA, MISSOULA, MONTANA 59812
MONTANA BUREAU OF MINES AND GEOLOGY MONTANA COLLEGE OF MINERAL SCIENCE AND TECHNOLOGY, BUTTE, MONTANA 59701

Abstract

Since 1900, more than 290 earthquakes have been reported near Flathead Lake, Montana. Surprisingly, none has exceeded magnitude 5 to . Most recent earthquake swarms appear to result from east-west or northwest-southeast extension along short fault segments west and north of the lake. Major normal faults like the Swan and Mission faults east of the lake may pose higher risk, but they appear dormant today. Deformation of sediments in Flathead Lake may be caused by several large earthquakes more than 10,000 years ago but is more probably due to glacial processes accompanying the last retreat of the Cordilleran ice sheet.

This article has been cited by other articles:

				G. C. ROGERS, J. F. CASSIDY, and R. M. ELLIS The Prince George, British Columbia, earthquake of 21 March 1986 Bulletin of the Seismological Society of America, October 1, 1990; 80(5): 1144 - 1161. [Abstract] [PDF]

				D. I. DOSER Source parameters of Montana earthquakes (1925-1964) and tectonic deformation in the northern Intermountain Seismic Belt Bulletin of the Seismological Society of America, February 1, 1989; 79(1): 31 - 50. [Abstract] [PDF]

				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]