1 Oct 2025, 22:40 UTC · Oct 1, 6:40 PM ET

M3.9 earthquake 79 km NE of Adak, Alaska

A magnitude 3.9 earthquake struck 79 km NE of Adak, Alaska at Oct 1, 6:40 PM ET, 222 km deep, minor – felt by people near the epicenter.

under 33–44–55–66+

Magnitude	3.9 mb
Time	1 Oct 2025, 22:40 UTC
Location	52.376°, -175.802° – 79 km NE of Adak, Alaska
Depth	222.4 km
Felt reports	0
USGS event	us6000re4g

Within 100 km

Other earthquakes nearby this year

Mag.	Where	When (ET)	Depth	Felt
5.3	39 km E of Adak, Alaska · tsunami flag	Jan 24, 4:25 PM 265 d ago	61 km	3 reports
5.1	40 km E of Adak, Alaska	Feb 1, 7:43 AM 257 d ago	62 km	1 report
5.0	74 km NE of Adak, Alaska	Feb 10, 6:09 PM 248 d ago	157 km	1 report
4.9	43 km E of Adak, Alaska	May 27, 8:25 PM 142 d ago	64 km	1 report
4.9	47 km SE of Adak, Alaska	Oct 25, 6:13 AM 356 d ago	57 km	1 report
4.5	82 km NNE of Adak, Alaska	Jul 7, 2:07 PM 101 d ago	174 km	–
4.4	100 km SW of Atka, Alaska	Oct 8, 3:38 PM 373 d ago	35 km	–
4.2	28 km SSE of Adak, Alaska	Jan 15, 10:50 AM 274 d ago	52 km	–
4.1	93 km SW of Atka, Alaska	Oct 3, 12:06 PM 13 d ago	50 km	–
4.0	63 km ENE of Adak, Alaska	Apr 6, 8:55 PM 193 d ago	153 km	–
4.0	47 km ESE of Adak, Alaska	Feb 17, 6:17 PM 241 d ago	60 km	–
4.0	45 km ESE of Adak, Alaska	Jan 9, 3:46 AM 281 d ago	57 km	–

FAQ

About this earthquake

How strong was the 79 km NE of Adak, Alaska earthquake?

Magnitude 3.9 (mb), minor – felt by people near the epicenter. Depth 222 km.

Was it felt?

No felt reports have been submitted to the USGS so far.

Were there aftershocks?

1 earthquakes within 100 km in the following two weeks are in our records, the strongest M4.4.

Earthquakes

Source: U.S. Geological Survey (USGS) earthquake catalog, real-time feeds and FDSN event service; magnitudes and locations are revised by seismologists for hours after an event. Times are Eastern (ET) unless marked UTC. Not an alert service: for warnings follow local authorities and tsunami centers.