Earthquake · reviewed by a seismologist
M 4.0ml
Earthquake near Bremerton, WA
No earthquake was likely felt in Bremerton in the 24 hours to 8:00 pm PST (04:00 UTC). The last one was M 4.2, 20 km (12 mi) SSW, at 2:05 pm PDT on 29 September 2026, estimated intensity III (weak) in town; 9,329 felt reports to USGS. Every earthquake near Bremerton
This page: a magnitude 4.0 earthquake was recorded 37 km (23 mi) northwest of Bremerton, WA, at 7:14 am PST on 24 December 2023 (15:14 UTC), 52 km deep. 887 people have reported feeling it to USGS.
USGS: 6 km W of Quilcene, Washington
51 km (31 mi) WNW of Seattle, WA · 46 km (29 mi) W of Shoreline, WA
- When
- 7:14 am PST on 24 December 2023 ()
- Where
- 37 km (23 mi) northwest of Bremerton, WA · earthquakes near Bremerton
- Magnitude
- M 4.0 (ml)
- Depth
- 52 km below the surface
- Felt
- 887 reports · strongest reported intensity III
- Measured shaking
- intensity III (ShakeMap)
- USGS impact alert
- green
- Nearest
- Kitsap County, 31 km SE
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 617 days ago
Earthquake alerts for Bremerton, WA
Get a notification in this browser when USGS records an earthquake near Bremerton, WA. No account or email needed.
Alerts are on for .
Not a warning. An alert comes after USGS publishes a quake, usually minutes after the shaking. For early warning use ShakeAlert, through your phone's Wireless Emergency Alerts or the MyShake app.
This was a light earthquake. It is usually felt clearly nearby and can rattle windows and dishes, but damage is uncommon.
At this magnitude and depth, people at rest would likely notice it out to about 85 km (53 mi) from the epicentre. In Bremerton, 37 km away, the estimate is intensity II (weak). Estimated from magnitude, depth and distance with the intensity equation USGS Did You Feel It? uses; felt reports, where there are any, are the measurement.
Likely felt in: Poulsbo 25 km, intensity II · Silverdale 28 km, intensity II · Sequim 31 km, intensity II · Port Townsend 36 km, intensity II · Bremerton 37 km, intensity II · Enetai 38 km, intensity II · Edmonds 44 km, intensity II · Shoreline 47 km, intensity II. Estimated for each town centre; each link is that town's own record.
How big was it?
This earthquake released about 17 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 5.0 would have released about 32 times as much.
- Northridge, California 1994 M 6.7 9,800× the energy of this one
- Mineral, Virginia 2011 M 5.8 440× the energy of this one
- Magna, Utah 2020 M 5.7 310× the energy of this one
- This earthquake M 4.0 about 17 tons of TNT
- Around the size people start to feel M 3.0 this one released 36× more
Energy from the Gutenberg–Richter relation (log10E = 1.5M + 4.8), rounded to two figures; bar length is magnitude, which is already a logarithm of energy. Magnitudes of past earthquakes from the USGS catalogue.
For this area
The largest earthquake within 50 km since 2016 was M 4.3 on 2023-10-09 — about 2.5 times the energy of this one.
Before 2016, the USGS record lists 2 earthquakes of M5 or more within 50 km:
- 6.1 Puget Sound region, Washington · 49 km SSE of this epicentre
- 5.3 Eastern Olympic Peninsula, Washington · 4 km SW of this epicentre
Since 2016: the QuakeIndex catalogue (US, M1.5+), built from the USGS FDSN event service. Before 2016: USGS ComCat, M5+ from 1900. Distances are between epicentres. This is the record, not a forecast.
Where
Epicentre 47.8197, -122.9600. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Kitsap County, WA | 31 km (19 mi) | SE | earthquakes near Kitsap County |
| Jefferson County, WA | 42 km (26 mi) | W | earthquakes near Jefferson County |
| Island County, WA | 43 km (27 mi) | NNE | earthquakes near Island County |
| Mason County, WA | 55 km (34 mi) | SSW | earthquakes near Mason County |
| Clallam County, WA | 76 km (47 mi) | WNW | earthquakes near Clallam County |
| San Juan County, WA | 77 km (48 mi) | N | earthquakes near San Juan County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
56 earthquakes have been recorded within 50 km since this one.
- 1.8 4 km SSW of Port Ludlow, Washington
- 2.3 3 km WNW of Navy Yard City, Washington
- 1.6 7 km ESE of Quilcene, Washington
- 1.8 5 km NE of Kingston, Washington
- 1.9 4 km WNW of Gorst, Washington
- 2.0 9 km W of Coupeville, Washington
- 1.9 2 km E of Belfair, Washington
- 1.8 4 km NNW of Port Townsend, Washington
- 1.7 8 km SSW of Seabeck, Washington
- 1.8 3 km WNW of Gorst, Washington
- 2.7 1 km ENE of Enetai, Washington
- 1.9 1 km E of Enetai, Washington
- 1.6 4 km SW of Port Ludlow, Washington
- 2.6 1 km ENE of Enetai, Washington
- 2.4 1 km ENE of Enetai, Washington
Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of . QuakeIndex does not forecast aftershocks. When USGS issues an operational aftershock forecast it appears on the USGS event page.
On USGS
- The official USGS event page — the source of record for every value above
- Did you feel it? Report it to USGS — reports go to USGS, not to us
- ShakeMap for this event, when USGS has produced one
QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.