USGS · 70168849
Earthquakes; September-October 1983
Abstract
Two major earthquakes (magntidue 7.0-7.9) occurred during the month of October. The first was on October 4 in northern Chile. the second occurred in the United States in the State of Idaho on October 28. This was the first major earthquake in the conterminous United States since a magnitude 7.2 event occurred near the coast of northern California on November 8, 1980, and was the first earthquake to cause fatalities in the conterminous United States since February 9, 1971. The most deadly earthquake occurred in eastern Turkey on October 30.
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W. J. Person. 1984. Earthquakes; September-October 1983. https://pubs.usgs.gov/publication/70168849
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