Montana: Large M5.9 Earthquake Near Lincoln, Felt Across the State

TWO TEACHABLE MOMENTs:  During late June a swarm of small magnitude earthquakes occurred near West Yellowstone, MT.  Hundreds of events with magnitudes less than M3.5 (mb) stirred the area for several weeks.  Near Lincoln, MT, a large magnitude M5.9 (Mww) earthquake woke up residents across the State at 16:30hrs UTC (12:30 a.m. MST) and was approximately 14 kms deep.

Below is a snapshot of the event on the seismometer -and-  a ground shaking intensity map based on reports from local citizens.  Ground shaking was the most intense near the epicenter.  Why was shaking felt so far across the Big Sky State?

 

 

 

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