• Dave Harmon, PW editor

Researchers discover evidence of ancient earthquakes in Grand Teton NP

Researchers have found evidence of two colossal quakes that shook the Grand Teton National Park area thousands of years ago.

One 10,000-year-old earthquake may have measured 6.6 to 7.2, while a 5,900-year old earthquake may have been magnitude 7.0 to 7.2. For comparison, the 1994 Northridge earthquake that struck California's San Fernando Valley measured 6.7 and resulted in the deaths of 87 people and injuries to 8,700.

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