During the month of June 2023, the Alaska Earthquake Center reported 3632 earthquakes with the magnitudes ranging between 0.4 and 5.7, and depths between 0 and 289 km. There were 20 earthquakes of magnitude greater than 4.0. The largest earthquake was magnitude 5.7 that occurred on June 8 at 12:31:44 AKDT (June 8, 20:31:44 UTC), 11 miles S of Kiska Island (Rat Islands). This earthquake was followed by aftershocks, and 70 of them were located.

The most notable event was a M4.8 earthquake 9 miles E of Central on June 11th at 6:32 am AKDT. It was reported as felt in Central, Fairbanks, North Pole, Delta, and Tok. 

Another notable  earthquake of M4.3 was located 19 miles S of White Mountains on June 15th at 11:23 pm AKDT. It was reported as felt in Nome and surrounding villages.

In June 2023, we also reported 220 earthquakes associated with volcanic activity (M=0.6-3.6), 57 ice quakes (magnitudes M=0.9-2.6) located in the Prince William Sound, Icy Bay, Yakutat Bay, and Ogden/Wright glacier, and 44 suspected quarry blasts, which were located in the vicinity of either Fort Knox or Usibelli mines.

21 earthquakes were reported as felt.


Magnitude 5.7, 11 miles S of Kiska Volcano, June 8 12:31:44 AKDT
Magnitude 5.3, 24 miles SE of Mt. Gareloi, June 13 08:16:02 AKDT
Magnitude 5.0, 16 miles S of Snowy Mountain, June 18 01:14:32 AKDT
Magnitude 4.8, 90 miles S of Isanotski Peaks, June 3 07:24:56 AKDT
Magnitude 4.8, 9 miles E of Central, June 11 06:32:20 AKDT
Magnitude 4.7, 91 miles S of Isanotski Peaks, June 6 08:06:51 AKDT
Magnitude 4.7, 93 miles SE of Chignik, June 15 23:04:13 AKDT
Magnitude 4.6, 92 miles S of Isanotski Peaks, June 3 14:49:25 AKDT
Magnitude 4.6, 83 miles SE of Westdahl Peak, June 3 16:54:52 AKDT
Magnitude 4.6, 16 miles SW of Segula Peak, June 8 12:33:16 AKDT

This report was compiled by N. Kozyreva

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.