Earthquakes 84 km SSW of Nikolski, Alaska
Right now
The most recent data we hold from USGS arrived 52 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 USGS 11 days ago.
It is the 6th strongest of the 113 detections recorded within 20 km of this point since 11 March 2026. Another comparable one was recorded here earlier the same day.
What the source measured
USGS reported: 84 km SSW of Nikolski, Alaska
USGS recorded magnitude 5.3 at a depth of 27 km.
Nearby, since 11 March 2026
- September 3, 2026 · score 18 · 0.0 km
- September 3, 2026 · score 1 · 3.9 km
- September 3, 2026 · score 8 · 4.5 km
How we know
2 recorded sources include USGS; independence is not established by this count.
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 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 |
| Legacy data-support index | 0.68/1 |
| Coordinates | 52.3070, -169.5440 |
| Nearest City | Anchorage (1544 km) |
| Urban exposure index (PEI) | 0 within 70 km |
| Impact Tier | minor |
| Timestamp | 2026-09-03T12:39:35.973Z |
| Source | https://earthquake.usgs.gov/earthquakes/eventpage/aka2026rlmrvm |
Physical priority index · v4 (historical). 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: 2026-09-03T12:39:35.973Z.
First archived: 2026-09-03T12:51:26.437Z. 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 | 26.8 |
| Tsunami | false |
| Felt | 2 |
| Mmi | 3.06 |
| Sig | 433 |
| Gfz Mag | 4.91 |
| Gfz Depth | 10 |
| Gfz MagType | mb |
| Gfz Region | Fox Islands, Aleutian Islands |
| MergedSources | [{"id":"gfz_gfz2026rgpi","source":"gfz","severity":"low","severityValue":29.46,"timestamp":1788439171980,"latitude":52.445,"longitude":-169.685}] |
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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