Earthquakes 229 km ESE of Attu Station, Alaska
Reported by USGS 62 days ago.
It is the 23rd strongest of the 33 detections recorded within 20 km of this point since 11 March 2026. Another comparable one was recorded here earlier the same day. 5 more were recorded here in the fortnight before it.
What the source measured
USGS reported: 229 km ESE of Attu Station, Alaska
USGS recorded magnitude 4.0 at a depth of 20 km.
Nearby, since 11 March 2026
- March 13, 2026 · score 7 · 4.9 km
- March 14, 2026 · score 2 · 5.5 km
- May 6, 2026 · score 20 · 6.3 km
How we know
Confirmed by 2 independent sources, including USGS.
Our own score for this event is 0 out of 100, at 65 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Event Data
| Type | Earthquake |
| Severity | low |
| Calamity Score (ours) | 0 / 100 |
| Our confidence | 65% |
| Coordinates | 52.2980, 176.4500 |
| Timestamp | 2026-07-01T10:50:19.653Z |
| Source | https://earthquake.usgs.gov/earthquakes/eventpage/aka2026mxdqsl |
Score Breakdown
Technical Details
| Mag | 4 |
| Depth | 20.4 |
| Tsunami | false |
| Mmi | 2.54 |
| Sig | 246 |
| Emsc Mag | 4 |
| Emsc Depth | -20.4 |
| Emsc MagType | ml |
| Emsc Region | RAT ISLANDS, ALEUTIAN ISLANDS |
| Emsc Auth | AK |
| Emsc SourceId | 2019959 |
| MergedSources | [{"id":"emsc_20260701_0000330","source":"emsc","severity":"low","severityValue":24,"timestamp":1782903019653,"latitude":52.298,"longitude":176.45}] |
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 10 February 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.
Want to know when something happens in this area?
Calamity.live data shows a earthquake event with CalamityScore 0/100, 229 km ESE of Attu Station, Alaska, based on data from usgs. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.