Earthquake near Belfair, WA

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.

At this magnitude and depth it was probably too small to be felt, even directly above it. In Belfair, 6 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.

Earthquakes near other towns within 30 km: Allyn, Seabeck, Navy Yard City, Erlands Point-Kitsap Lake, Chico, Bethel.

How big was it?

This earthquake released about 220 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.6 would have released about 32 times as much.

1. Mineral, Virginia 2011 M 5.8 70,000× the energy of this one
2. Magna, Utah 2020 M 5.7 50,000× the energy of this one
3. Around the size people start to feel M 3.0 4.4× the energy of this one
4. This earthquake M 2.6 about 220 lb of TNT

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 4.1 on 2017-02-23 — about 190 times the energy of this one.

Before 2016, the USGS record lists 6 earthquakes of M5 or more within 50 km; the five largest:

1. 6.8 The 2001 Nisqually, Washington Earthquake · 40 km SSE of this epicentre Feb 28, 2001
2. 6.7 1 km ENE of Dash Point, Washington · 40 km ESE of this epicentre Apr 29, 1965
3. 6.1 Puget Sound region, Washington · 14 km SE of this epicentre Nov 13, 1939
4. 5.8 Puget Sound area, Washington · 24 km S of this epicentre Feb 15, 1946
5. 5.3 Eastern Olympic Peninsula, Washington · 35 km NNW of this epicentre Mar 17, 1904

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 47.4917, -122.8818. Map © OpenStreetMap contributors.

Nearby places

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. 1.5 4 km ESE of Indianola, Washington 16:12 UTC
2. 1.8 2 km WSW of Federal Way, Washington 01:09 UTC
3. 2.0 2 km E of Tracyton, Washington 08:25 UTC
4. 1.7 9 km ENE of McCleary, Washington 20:29 UTC
5. 1.6 7 km NE of Quilcene, Washington 18:33 UTC
6. 1.6 7 km SSW of Shelton, Washington 22:51 UTC
7. 1.6 6 km S of Gorst, Washington 17:27 UTC
8. 1.9 4 km WSW of Erlands Point-Kitsap Lake, Washington 14:16 UTC
9. 3.2 7 km ESE of Maplewood, Washington 06:10 UTC
10. 1.9 7 km W of Shelton, Washington 05:47 UTC
11. 1.9 2 km E of Tracyton, Washington 01:33 UTC
12. 1.8 2 km ENE of Tracyton, Washington 14:43 UTC
13. 1.8 3 km E of Tracyton, Washington 01:12 UTC
14. 1.8 3 km NNW of Enetai, Washington 21:07 UTC
15. 1.5 2 km NNW of Enetai, Washington 14:52 UTC

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of 02:27 UTC. 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.