Thread: Andreanof Islands, Aleutians earthquake pair

An interesting pair of events (see attached image from the WLIN AS-1
station) from the Aleutian Islands of Alaska. Preliminary USGS
magnitudes are 6.3 and 6.5. The seismograms are very similar! Although
most large earthquakes are single events (with aftershocks following the
main shock), pairs of earthquakes (approximately the same size and
location and occurring within hours or days of each other), or even
triplets, are not uncommon.

-Larry Braile

--
Lawrence W. Braile, Professor and Department Head
Department of Earth and Atmospheric Sciences
550 Stadium Mall Drive
Purdue University
West Lafayette, IN 47907-2051
(765) 494-5979 (O), (765) 496-1210 (Fax)
E-mail: braile<at>purdue.edu <braile<at>purdue.edu>
Web page: http://web.ics.purdue.edu/~braile
http://web.ics.purdue.edu/%7Ebraile
Departmental web page: http://www.purdue.edu/eas/
http://www.purdue.edu/eas/
SAGE web page: http://www.sage.lanl.gov/