During the week of September 18, 2023, the Alaska Earthquake Center reported 933 earthquakes within the state. The largest earthquake was magnitude 5.5 that occurred on September 20 at 17:13:58 AKDT (September 21, 01:13:58 UTC), 31 miles S of Sand Point. There were 13 aftershocks associated with this earthquake ranging from magnitude 1.5 to 5.

Other significant events include a magnitude 3.9 earthquake that occurred  0 miles SE of Salcha and 7 miles southwest of Pump Station 08 on September 23, 2023 03:12:51 AKDT, this event was reported at felt in Eielson AFB, North Pole and Fairbanks, a magnitude 3.4 earthquake that occurred 17 miles NE of Iliamna Volcano on September 17, 2023 22:09:43 AKDT, this event was reported as felt in the Kenai Peninsula, a magnitude 3.3 earthquake that occurred 14 miles W of Willow on September 19, 2023 05:58:06 AKDT, this event was reported as felt in Willow, Talkeetna, and Anchorage.

There were 20 icequakes recorded near Prince William Sound region, Icy Bay, Yakutat Bay and northeast of Juneau.

3 events were reported as felt.