During the week of September 23, 2024, the Alaska Earthquake Center reported 746 earthquakes within the state. The largest earthquake was a magnitude 4.4 event that occurred on September 25 at 23:25:08 AKST (September 26, 07:25:08 UTC), 23 miles northeast of Healy. This event was reported as felt in Fairbanks.

Only one other earthquake was reported as felt this week: a magnitude 2.0 that occurred on September 28, 2024, 10:54:48 AKDT,  2 miles northeast of Salcha. 

Swarm activity continues south of Adak and at multiple locations across the Brooks Range. An earthquake swarm is a sequence of seismic events that does not follow the traditional mainshock-aftershock pattern. It is often characterized by multiple earthquakes occurring within a small area and time frame, with no clear event of origin. The cause of these swarms is not well understood and is an active research topic across the community. Please see our article "What is an Earthquake Swarm?" if you would like to learn more! 

Twenty-nine icequakes were detected across southern Alaska this week. Additionally, four mining blasts were observed at the Fort Knox mine complex, north of Fairbanks.