Strong earthquake · September 3, 2026
M 6.3 Earthquake, 92 km SSW of Nikolski, Alaska
A magnitude 6.3 (mww) earthquake struck 92 km SSW of Nikolski, Alaska on September 3, 2026 at 11:17 UTC, at a depth of about 21 km (13 mi), according to the USGS. 3 people sent "Did You Feel It?" reports. The USGS PAGER alert level is green.
Updated Oct 22, 2026, 7:27 AM EDT (USGS snapshot)
This is not an early-warning system. For tsunami warnings see tsunami.gov; for emergencies follow local authorities.
| Magnitude | 6.3 mww (Strong) |
|---|---|
| Time (UTC) | |
| Local time at epicenter | Sep 3, 2026, 3:17 AM AKDT |
| U.S. Eastern Time | Sep 3, 2026, 7:17 AM EDT |
| Location | 92 km SSW of Nikolski, Alaska |
| Coordinates | 52.163° N, 169.344° W |
| Depth | 21.0 km (13.0 mi), shallow |
| Felt reports | 3 "Did You Feel It?" responses · max reported intensity 5 |
| ShakeMap intensity | MMI 3.9 (estimated maximum) |
| Tsunami flag | Yes (see note below) |
| PAGER alert | Green |
| USGS event ID | us7000tdvt |
Source: USGS Earthquake Hazards Program, event us7000tdvt. Last updated by the USGS Oct 22, 2026, 11:27:28 UTC.
What the numbers mean
- Tsunami flag
- The USGS sets this flag for large events in oceanic regions. It does not mean a tsunami happened or will happen. Official tsunami warnings come from the NOAA Tsunami Warning Centers at tsunami.gov.
- PAGER alert
- An automatic USGS estimate of likely fatalities and economic losses: green (little or none), yellow, orange, or red (highest). It can change as more data arrives.
- Felt reports
- People who felt shaking can describe it through the USGS "Did You Feel It?" survey on the event page. The count grows for hours or days after an event.
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Other recent earthquakes within 300 km
| Magnitude | Location | Time | Depth |
|---|---|---|---|
| M 3.4 | 110 km SSW of Nikolski, Alaska | 0 sec ago | 10.9 km |
| M 2.5 | 123 km SSE of Unalaska, Alaska | 0 sec ago | 10.0 km |
| M 3.2 | 135 km SW of Nikolski, Alaska | 0 sec ago | 0.0 km |
| M 4.6 | 100 km NNW of Nikolski, Alaska | 0 sec ago | 230.5 km |
| M 2.8 | 77 km E of Nikolski, Alaska | 0 sec ago | 62.1 km |
| M 3.7 | 40 km SSE of Nikolski, Alaska | 0 sec ago | 131.1 km |
| M 2.9 | 121 km SSW of Nikolski, Alaska | 16 hr ago | 17.3 km |
| M 2.5 | 139 km S of Unalaska, Alaska | 22 hr ago | 2.6 km |
| M 4.7 | 114 km SSW of Nikolski, Alaska | 7 days ago | 10.0 km |
| M 6.5(tsunami flag) | 170 km W of Nikolski, Alaska PAGER green | 35 days ago | 98.0 km |
| M 6.0(tsunami flag) | 96 km SW of Nikolski, Alaska PAGER green | 241 days ago | 14.0 km |
After an earthquake
Expect aftershocks. If you are near the coast and feel strong or long shaking, move to high ground right away without waiting for an official warning. Check on neighbors and follow instructions from local emergency officials.
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