Right now
The most recent data we hold from USGS arrived 4 hours ago, and this point is in it.
2 other detections within 20 km in the last 24 hours, the nearest 2 km from here.
Reported by USGS today.
It is one of only 3 we have recorded within 20 km of this point since 27 May 2026. The last comparable one was on 27 May 2026.
What the source measured
USGS reported: 6 km WNW of Wauna, Washington
USGS recorded magnitude 4.2 at a depth of 28 km.
The seismic region given by the source is 6 km WNW of Wauna, Washington.
Urban PEI: 51,557 within a heuristic 30 km radius; not unique people.
Nearby, since 27 May 2026
- May 27, 2026 · 3.4 km
How we know
One source: USGS. 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 v5. Rows carrying other versions were judged by different rules and are not directly comparable.
Event Data
| Type | Earthquake |
| Severity | Low |
| Calamity Score (ours) | 18 / 100 |
| Legacy data-support index | 0.70/1 |
| Coordinates | 47.4003, -122.7220 |
| Nearest City | Bremerton (20 km) |
| Urban exposure index (PEI) | 51.6K within 30 km |
| Impact Tier | minor |
| Timestamp | 2026-09-29T21:05:56.370Z |
| Source | https://earthquake.usgs.gov/earthquakes/eventpage/uw714111952 |
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_canada. Occurrence: 2026-09-29T21:05:56.370Z.
First archived: 2026-09-29T21:20:15.732Z. Material modification: 2026-09-29T22:20:38.250Z.
Retained revisions are prospective; earlier versions may be unavailable. No revision entry does not prove that a record never changed.
20 retained revisions changed source fields this page does not show; the index, severity and version stayed the same.
Score Breakdown
Technical Details
| Mag | 4.15 |
| Depth | 27.92 |
| Sig | 645 |
| Tsunami | false |
| Alert | green |
| Region | 6 km WNW of Wauna, Washington |
| Usgs Mag | 4.15 |
| Usgs Depth | 27.92 |
| Usgs Tsunami | false |
| Usgs Felt | 7823 |
| Usgs Mmi | 3.45 |
| Usgs Alert | green |
| Usgs Sig | 645 |
| Usgs Dyfi Mag | 4.15 |
| Usgs Dyfi Depth | 27.92 |
| Usgs Dyfi Felt | 7804 |
| Usgs Dyfi Cdi | 3.8 |
| Usgs Dyfi CdiDescription | Weak |
| Usgs Dyfi Mmi | 3.45 |
| Usgs Dyfi Alert | green |
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.
Review the area, threshold and delivery channel in your account.
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