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Natalia Ruppert, Seismologist, Alaska Earthquake Information Center, GI UAF
- Tuesday, January 29
- UAS Room 229
The Queen Charlotte fault is a strike-slip fault that marks the boundary between two tectonic plates: the Pacific Plate to the southwest and the North American Plate to the northeast. This fault has previously ruptured in major earthquakes, including a magnitude 8.1 on August 22, 1949; a magnitude 7.6 on July 30, 1972; and the recent magnitude 7.7 earthquake that occurred on October 28, 2012 off Haida Gwaii in British Columbia. On January 5, 2013, a magnitude 7.5 event was located near the northern end of the 1949 rupture but south of the 1972 event; i.e., it most likely occurred in the remaining rupture gap. This presentation will discuss characteristics of each of these earthquakes and how they are related to the tectonics of the Queen Charlotte fault.
This program is free and open to the public. It is sponsored with the generous support of the US Forest Service, UAS Sitka Campus and the Sitka Conservation Society.
If you have any questions, please contact Kitty LaBounty at 747-9432