Aftershocks, earthquake effects, and the location of the large 14 December 1872 earthquake near Entiat, central Washington

Bulletin of the Seismological Society of America
By: , and 

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Abstract

Reported aftershock durations, earthquake effects, and other observations from the large 14 December 1872 earthquake in central Washington are consistent with an epicenter near Entiat, Washington. Aftershocks were reported for more than 3 months only near Entiat. Modal intensity data described in this article are consistent with an Entiat area epicenter, where the largest modified Mercalli intensities, VIII, were assigned between Lake Chelan and Wenatchee. Although ground failures and water effects were widespread, there is a concentration of these features along the Columbia River and its tributaries in the Entiat area. Assuming linear ray paths, misfits from 23 reports of the directions of horizontal shaking have a local minima at Entiat, assuming the reports are describing surface waves, but the region having comparable misfit is large. Broadband seismograms recorded for comparable ray paths provide insight into the reasons why possible SP times estimated from felt reports at two locations are several seconds too small to be consistent with an Entiat area epicenter.

Additional publication details

Publication type Article
Publication Subtype Journal Article
Title Aftershocks, earthquake effects, and the location of the large 14 December 1872 earthquake near Entiat, central Washington
Series title Bulletin of the Seismological Society of America
DOI 10.1785/0120170224
Volume 108
Issue 1
Year Published 2017
Language English
Publisher Seismological Society of America
Contributing office(s) Earthquake Science Center
Description 18 p.
First page 66
Last page 83
Country United States
State Washington
Other Geospatial Entiat