Earthquakes in Fox Islands, Aleutian Islands
Right now
The most recent data we hold from EMSC arrived 31 minutes ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
Nothing else has been detected within 20 km in the last 24 hours.
Reported by EMSC 113 days ago.
It is the strongest of the 7 detections recorded within 20 km of this point since 11 May 2026. The last comparable one was on 11 May 2026. One more was recorded here in the fortnight before it.
What the source measured
EMSC reported: FOX ISLANDS, ALEUTIAN ISLANDS
EMSC recorded magnitude 5.3 at a depth of 36 km.
The seismic region given by the source is FOX ISLANDS, ALEUTIAN ISLANDS.
Nearby, since 11 May 2026
- June 8, 2026 · score 0 · 14.3 km
- August 11, 2026 · score 0 · 15.6 km
- July 27, 2026 · score 0 · 16.0 km
How we know
One source: EMSC. Not yet confirmed by a second, independent source.
Our own score for this event is 18 out of 100.
This is our versioned heuristic index, not source severity or a calibrated probability. Urban PEI does not count unique people.
Computed under scoring rules v1. 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 |
| Legacy data-support index | 0.65/1 |
| Coordinates | 52.1167, -170.5572 |
| Nearest City | Anadyr (1559 km) |
| Urban exposure index (PEI) | 0 within 20 km |
| Impact Tier | minor |
| Timestamp | 2026-05-23T21:49:22.550Z |
| Source | https://www.seismicportal.eu/eventdetail.html?unid=20260523_0000336 |
Physical priority index · v1. Heuristic priority, not calibrated probability, predictive accuracy or damage. The legacy data-support index combines assigned source support and field availability. Urban PEI is distance-weighted and does not count unique people; zero does not establish that nobody is present. Model cards.
Source and revision timeline
Source: emsc. Occurrence: 2026-05-23T21:49:22.550Z.
First archived: 2026-05-23T22:04:11.701Z. Material modification: not recorded.
Retained revisions are prospective; earlier versions may be unavailable. No revision entry does not prove that a record never changed.
Score Breakdown
Technical Details
| Mag | 5.3 |
| Depth | 36 |
| MagType | mb |
| Region | FOX ISLANDS, ALEUTIAN ISLANDS |
| Auth | EMSC |
| SourceId | 1999407 |
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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