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Sierra's Eastern Front Long Overdue For Large Earthquake

RENO, Nev. (AP) — Scientists say the Sierra's eastern front is long overdue for a large earthquake along the California-Nevada line, where a magnitude-7 event expected on average every 30 years hasn't occurred in six decades.

Nevada Seismology Laboratory Director Graham Kent plans to discuss what he calls the earthquake "drought" at a forum Tuesday ahead of the Seismological Society of America's annual meeting beginning Wednesday in Reno.

Kent says a magnitude-6 earthquake or larger typically strikes every decade along the Sierra Nevada frontal fault system running from south of Yosemite National Park to north of Reno and Lake Tahoe.

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He says there were seven magnitude-6.5 or larger in the region from 1915 to 1954, but none since. The last magnitude-6 was 22 years ago in the Carson Valley south of Carson City.