WEEK SEISMICITY REPORT FOR JUNE 30, 2025 TO JULY 6, 2025
During the week of June 30, 2025, the Alaska Earthquake Center reported 453 earthquakes within the state. The largest earthquake was magnitude 4.5 that occurred on July 5 at 10:15:07 AKDT (July 5, 18:15:07 UTC), 21 miles E of Iliamna Volcano. This event was felt in Anchorage, Homer, and surrounding areas.
There were 2 additional events reported as felt this week. First, a magnitude 3.9 earthquake 28 km SSE of Port Graham was felt in Homer on July 3 at 17:19:46 (UTC). Then a few hours later at 22:40:12 (UTC) a magnitude 4.4 earthquake occurred 25 km SW of Skwentna. This event was reported as felt in and around Anchorage.
Additionally, 8 icequakes were recorded this week near Juneau and Prince William Sound.
NOTABLE EVENTS IN DESCENDING ORDER OF MAGNITUDE
Magnitude 4.5, 21 miles E of Iliamna Volcano, July 5 10:15:07 AKDT
Magnitude 4.4, 21 miles W of Skwentna, July 3 14:40:13 AKDT
Magnitude 4.3, 47 miles SW of Mt. Gareloi, July 2 20:46:21 AKDT
Magnitude 3.9, 17 miles SE of Port Graham, July 3 09:19:46 AKDT
Magnitude 3.7, 59 miles SE of Adak, July 2 20:42:03 AKDT
Magnitude 3.6, 19 miles S of Makushin Volcano, July 1 15:57:41 AKDT
Magnitude 3.5, 40 miles S of Westdahl Peak, July 6 01:27:04 AKDT
Magnitude 3.4, 75 miles SE of Port Graham, July 3 14:57:25 AKDT
Magnitude 3.4, 100 miles S of Nikolski, July 5 13:44:04 AKDT
Magnitude 3.3, 42 miles SE of Atka, July 5 07:28:33 AKDT
This report was compiled by Will Dienstfrey
The data in this report are preliminary and subject to revision. The earthquake parameters have been determined by the AEC, with supplemental data provided by the USGS National Earthquake Information Center. The data are released on the condition that none of the cooperating agencies may be held liable for any damaged resulting from its authorized or unauthorized use.
For more information on earthquakes and seismology, contact the AEC at 907-474-7320.