QuakeIndex

Earthquake · reviewed by a seismologist

M 2.8ml

2 km NNW of Fircrest, Washington

· 57 km deep · released about 530 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Pierce County 37 kmThurston County 42 kmKitsap County 43 kmMason County 49 kmKing County 59 kmLewis County 77 kmJefferson County 96 kmGrays Harbor County 99 kmIsland County 100 km
Distance rings around the epicentre, with the nearest towns at their true direction and later quakes as coloured dots. Not a shaking map — see the USGS ShakeMap for that.
When
Magnitude
M 2.8 (ml)
Depth
57 km below the surface
Felt
18 reports · strongest reported intensity III
Measured shaking
intensity II (ShakeMap)
Nearest
Pierce County, 37 km SE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 554 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 18 people have reported feeling it to USGS.

How big was it?

This earthquake released about 530 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 29,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 20,000× the energy of this one
  3. Around the size people start to feel M 3.0 1.8× the energy of this one
  4. This earthquake M 2.8 about 530 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.

Where

Epicentre 47.2610, -122.5362. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Pierce County, WA 37 km (23 mi) NW of here earthquakes near Pierce County
Thurston County, WA 42 km (26 mi) NNE of here earthquakes near Thurston County
Kitsap County, WA 43 km (27 mi) SSE of here earthquakes near Kitsap County
Mason County, WA 49 km (30 mi) ESE of here earthquakes near Mason County
King County, WA 59 km (36 mi) WSW of here earthquakes near King County
Lewis County, WA 77 km (48 mi) N of here earthquakes near Lewis County

Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.

Aftershocks so far

57 earthquakes have been recorded within 50 km since this one.

  1. 1.7 3 km ESE of Belfair, Washington
  2. 1.7 2 km NNW of Algona, Washington
  3. 1.9 2 km NNW of Algona, Washington
  4. 1.7 12 km SW of Seabeck, Washington
  5. 1.7 3 km WNW of Belfair, Washington
  6. 1.6 3 km W of Gorst, Washington
  7. 2.1 1 km NNW of Artondale, Washington
  8. 1.7 2 km N of Lakeland South, Washington
  9. 1.8 3 km E of Home, Washington
  10. 1.8 1 km S of Auburn, Washington
  11. 1.5 2 km S of Black Diamond, Washington
  12. 1.5 5 km SSW of Gorst, Washington
  13. 1.7 3 km ENE of Enetai, Washington
  14. 1.7 1 km SSE of Kapowsin, Washington
  15. 2.1 Puget Sound region, 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.

For this area

The largest earthquake within 50 km in our catalogue was M 4.1 on 2017-02-23 — it released about 78 times the energy of this one.

From the QuakeIndex catalogue, built from the USGS FDSN event service.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.