Earthquakes 151 km WSW of Adak, Alaska
Right now
The most recent data we hold from USGS arrived 61 minutes ago, and this point is in it.
2 other detections within 20 km in the last 24 hours, the nearest 7 km from here.
Reported by USGS today.
It is the 2nd strongest of the 15 detections recorded within 20 km of this point since 18 March 2026. Another comparable one was recorded here earlier the same day. 4 more were recorded here in the fortnight before it.
What the source measured
USGS reported: 151 km WSW of Adak, Alaska
USGS recorded magnitude 5.3 at a depth of 41 km.
Nearby, since 18 March 2026
- May 21, 2026 · score 0 · 6.7 km
- September 11, 2026 · score 18 · 6.8 km
- June 7, 2026 · score 0 · 9.5 km
How we know
Confirmed by 3 independent sources, including USGS.
Our own score for this event is 18 out of 100, at 71 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Computed under scoring rules v4. Rows carrying other versions were judged by different rules and are not directly comparable.
Event Data
| Type | Earthquakes |
| Severity | Medium |
| Calamity Score (ours) | 18 / 100 |
| Our confidence | 71% |
| Coordinates | 51.2130, -178.5429 |
| Nearest City | Anadyr (1520 km) |
| Impact Tier | minor |
| Timestamp | 2026-09-11T10:47:12.613Z |
| Source | https://earthquake.usgs.gov/earthquakes/eventpage/us7000tgky |
Score Breakdown
Technical Details
| Mag | 5.3 |
| Depth | 40.89 |
| Tsunami | true |
| Mmi | 5.27 |
| Sig | 432 |
| Emsc Mag | 5.3 |
| Emsc Depth | 40.9 |
| Emsc MagType | mb |
| Emsc Region | ANDREANOF ISLANDS, ALEUTIAN IS. |
| Emsc Auth | NEIC |
| Emsc SourceId | 2058844 |
| Gfz Mag | 5.37 |
| Gfz Depth | 10 |
| Gfz MagType | mb |
| Gfz Region | Andreanof Islands, Aleutian Islands |
| Usgs Shakemap Mag | 5.3 |
| Usgs Shakemap Depth | 40.89 |
| Usgs Shakemap Mmi | 5.27 |
| Usgs Shakemap MmiDescription | Moderate |
| Usgs Shakemap Sig | 432 |
Safety Information
If you feel shaking: Drop, Cover, and Hold On. Move away from windows, heavy objects, and exterior walls. After shaking stops, check for injuries and structural damage. Be prepared for aftershocks, which can occur minutes to months after the mainshock. Follow instructions from local emergency management authorities.
Series begins 8 March 2026. Comparisons refer to that period only. Collection gap: 14-26 August 2026.
This data is aggregated algorithmically from scientific sources. Not a replacement for official emergency warnings.
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