QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1ml

1 km NNW of Artondale, Washington

· 31 km deep · released about 40 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Kitsap County 36 kmMason County 41 kmThurston County 45 kmPierce County 46 kmKing County 63 kmLewis County 84 kmJefferson County 87 kmGrays Harbor County 93 kmIsland County 94 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 2.1 (ml)
Depth
31 km below the surface
Felt
1 report · strongest reported intensity I
Nearest
Kitsap County, 36 km N
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2480 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 1 person has reported feeling it to USGS.

How big was it?

This earthquake released about 40 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.1 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 380,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 270,000× the energy of this one
  3. Around the size people start to feel M 3.0 24× the energy of this one
  4. This earthquake M 2.1 about 40 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 47.3123, -122.6275. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Kitsap County, WA 36 km (23 mi) S of here earthquakes near Kitsap County
Mason County, WA 41 km (26 mi) E of here earthquakes near Mason County
Thurston County, WA 45 km (28 mi) NNE of here earthquakes near Thurston County
Pierce County, WA 46 km (29 mi) NW of here earthquakes near Pierce County
King County, WA 63 km (39 mi) WSW of here earthquakes near King County
Lewis County, WA 84 km (52 mi) NNW 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. 1.5 2 km NNW of Manchester, Washington
  2. 2.2 1 km E of Enetai, Washington
  3. 1.9 0 km N of Vaughn, Washington
  4. 1.5 5 km W of Gorst, Washington
  5. 2.4 0 km NE of Enetai, Washington
  6. 2.0 2 km NE of Enetai, Washington
  7. 1.7 3 km SW of Bainbridge Island, Washington
  8. 1.6 2 km SSE of Bainbridge Island, Washington
  9. 1.5 2 km NE of Enetai, Washington
  10. 1.6 3 km SSW of Bainbridge Island, Washington
  11. 1.9 1 km ENE of Enetai, Washington
  12. 3.2 0 km NNE of Enetai, Washington
  13. 1.6 2 km SW of Elk Plain, Washington
  14. 1.5 5 km WSW of Shelton, Washington
  15. 1.7 5 km W of Burley, 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 1,000 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.