Earthquakes 166 km SW of Nikolski, Alaska
Right now
The most recent data we hold from USGS arrived 53 minutes ago, and this point is in it.
Nothing else has been detected within 20 km in the last 24 hours.
Reported by USGS today.
It is the 3rd strongest of the 7 detections recorded within 20 km of this point since 11 May 2026. The last comparable one was on 17 September 2026. One more was recorded here in the fortnight before it.
What the source measured
USGS reported: 166 km SW of Nikolski, Alaska
USGS recorded magnitude 4.0 at a depth of 13 km.
Nearby, since 11 May 2026
- May 11, 2026 · score 0 · 8.6 km
- May 25, 2026 · score 7 · 9.1 km
- August 11, 2026 · score 0 · 19.2 km
How we know
2 recorded sources include USGS; independence is not established by this count.
Our own score for this event is 0 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 v5. Rows carrying other versions were judged by different rules and are not directly comparable.
Event Data
| Type | Earthquakes |
| Severity | Low |
| Calamity Score (ours) | 0 / 100 |
| Legacy data-support index | 0.67/1 |
| Coordinates | 52.0140, -170.7920 |
| Nearest City | Anadyr (1564 km) |
| Urban exposure index (PEI) | 0 within 30 km |
| Impact Tier | minor |
| Timestamp | 2026-09-19T08:47:50.579Z |
| Source | https://earthquake.usgs.gov/earthquakes/eventpage/aka2026sotica |
Physical priority index · v5. 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: usgs. Occurrence: 2026-09-19T08:47:50.579Z.
First archived: 2026-09-19T17:42:43.386Z. Material modification: not recorded.
Retained revisions are prospective; earlier versions may be unavailable. No revision entry does not prove that a record never changed.
2026-09-19T19:03:14.041Z · data_change
Index 0 → 0; severity low → low; version 5 → 5.
2026-09-19T17:53:27.472Z · data_change
Index 0 → 0; severity low → low; version 5 → 5.
Score Breakdown
Technical Details
| Mag | 4 |
| Depth | 12.9 |
| Tsunami | false |
| Mmi | 2.73 |
| Sig | 246 |
| Emsc Mag | 4 |
| Emsc Depth | 12.9 |
| Emsc MagType | ml |
| Emsc Region | FOX ISLANDS, ALEUTIAN ISLANDS |
| Emsc Auth | AK |
| Emsc SourceId | 2062579 |
| MergedSources | [{"id":"emsc_20260919_0000213","source":"emsc","severity":"low","severityValue":24,"timestamp":1789807670579,"latitude":52.014,"longitude":-170.792}] |
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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