2007 Northeast Brooks Range Earthquake Swarm

The Earthquake Center recorded an unusual sequence of earthquakes northeast of Brooks Range in April 2007. The sequence started with a few minor events (magnitude 3+) on April 8th. The largest earthquake (M4.9) occurred on April 28 at 5:20 UTC (April 27, 9:20 pm ADT). As of the end of April, analysts have located 75 events as part of this sequence. Four events had magnitudes greater than 4.3. Due to sparse seismic network coverage in the area (the nearest station is located 152 miles away), accuracy of the earthquake locations is poor, especially for the smaller events recorded by very few stations.

Last Modified: May 28, 2024