Monthly Seismicity Report For September 1, 2019 to September 30, 2019

During the month of September 2019, the Alaska Earthquake Center reported 4354 earthquakes within the state. The largest earthquake was magnitude 5.7 that occurred on September 10 at 12:32:14 AKST (September 10, 20:32:14 UTC), 250 km  W of Sitka in the Gulf of Alaska. 19 earthquake of M4.0-5.4 occurred along the Aleutian chain. Notable events of M5.2 and M5.0 occured 45 km W of Willow and 85 km W of Haines respectivly. Seismic activity was ongoing in NE Brooks Range as well as offshore Kodiak. A lot of glacial events were located in Prince William Sound, Icy Bay and Yakutat Bay as usual this time of a year.  Seventeen earthquake were felt.

Notable Events in Descending Order of Magnitude

Magnitude 5.7, 145 miles SW of Pelican, September 10 11:32:15 AKST
Magnitude 5.4, 107 miles S of Adak, September 9 12:24:19 AKST
Magnitude 5.3, 78 miles SE of Okmok Caldera, September 23 08:51:13 AKST
Magnitude 5.3, 68 miles SE of Okmok Caldera, September 23 08:51:11 AKST
Magnitude 5.2, 20 miles SE of Skwentna, September 16 16:09:56 AKST
Magnitude 5.0, 43 miles SW of Klukwan, August 31 19:32:26 AKST
Magnitude 4.9, 28 miles S of Mt. Gareloi, September 8 18:54:05 AKST
Magnitude 4.9, 17 miles SE of Akutan Pass, September 14 04:25:55 AKST
Magnitude 4.6, 44 miles SE of Sand Point, September 2 20:39:30 AKST
Magnitude 4.6, 41 miles SE of Unalaska, September 27 14:27:35 AKST

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 authroized or unauthorized use.

For more information on earthquakes and seismology, contact the AEC at (907)-474-7320.