to highlight a significant 6.5 magnitude earthquake that occurred yesterday near Stanley, Idaho, widely felt from Spokane, Washington to Salt Lake City, Utah. This was the strongest earthquake in the region since the 1983 M6.9 Borah Peak earthquake (October 28, 1983), the epicenter of which is located 100 km east of this event on the Lost River fault zone.
More information about the temblor: M 6.5 - 72km W of Challis, Idaho
Graphic courtesy U.S. Geological Survey.