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15 Sept 2026, 05:21 UTC · Sep 15, 1:21 AM ET

M3.5 earthquake 91 km SSW of Unalaska, Alaska

A magnitude 3.5 earthquake struck 91 km SSW of Unalaska, Alaska at Sep 15, 1:21 AM ET, 30 km deep, minor – felt by people near the epicenter.

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M3.5 91 km SSW of Unalaska, AlaskaM3.8 41 km S of Unalaska, AlaskaM3.9 43 km S of Unalaska, AlaskaM3.9 56 km ENE of Nikolski, AlaskaM3.9 40 km ESE of Nikolski, AlaskaM4.0 55 km SE of Unalaska, AlaskaM4.0 81 km E of Nikolski, AlaskaM4.0 31 km E of Nikolski, AlaskaM4.1 85 km E of Nikolski, AlaskaM4.4 43 km ESE of Nikolski, AlaskaM4.5 30 km SSW of Unalaska, AlaskaM5.0 83 km SSW of Unalaska, AlaskaM5.0 54 km ENE of Nikolski, Alaska
under 33–44–55–66+
Magnitude3.5 mb
Time15 Sept 2026, 05:21 UTC
Location53.124°, -167.084° – 91 km SSW of Unalaska, Alaska
Depth30.0 km
Felt reports0
Max. estimated intensity (MMI)2.9
USGS eventus7000thm1
Within 100 km

Other earthquakes nearby this year

Mag.WhereWhen (ET)DepthFelt
5.083 km SSW of Unalaska, AlaskaJun 13, 6:38 AM
125 d ago		53 km3 reports
5.054 km ENE of Nikolski, Alaska · tsunami flagNov 25, 12:16 PM
325 d ago		66 km10 reports
4.530 km SSW of Unalaska, AlaskaJul 12, 7:23 AM
96 d ago		96 km15 reports
4.443 km ESE of Nikolski, AlaskaDec 11, 11:23 AM
309 d ago		35 km–
4.185 km E of Nikolski, AlaskaFeb 12, 10:35 PM
246 d ago		35 km–
4.055 km SE of Unalaska, AlaskaJan 18, 9:06 PM
271 d ago		55 km–
4.081 km E of Nikolski, AlaskaJan 6, 7:18 AM
283 d ago		42 km–
4.031 km E of Nikolski, AlaskaNov 5, 4:05 PM
345 d ago		56 km–
3.943 km S of Unalaska, AlaskaJun 11, 12:53 PM
127 d ago		92 km–
3.956 km ENE of Nikolski, AlaskaJan 2, 2:45 PM
287 d ago		62 km–
3.940 km ESE of Nikolski, AlaskaJan 2, 9:34 AM
287 d ago		44 km–
3.841 km S of Unalaska, AlaskaJul 14, 10:56 AM
94 d ago		83 km1 report
FAQ

About this earthquake

How strong was the 91 km SSW of Unalaska, Alaska earthquake?

Magnitude 3.5 (mb), minor – felt by people near the epicenter. Depth 30 km. Strongest estimated shaking: intensity 2.9 on the Modified Mercalli scale.

Was it felt?

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

Were there aftershocks?

No earthquakes within 100 km have followed so far in our records.

Earthquakes

More

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.

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M3.5 earthquake 91 km SSW of Unalaska, Alaska — 77.today