QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1ml

6 km NNE of Olympia, Washington

· 41 km deep · released about 43 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Thurston County 18 kmMason County 36 kmPierce County 55 kmKitsap County 63 kmLewis County 69 kmGrays Harbor County 72 kmKing County 90 kmPacific County 91 kmJefferson County 93 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
41 km below the surface
Felt
6 reports · strongest reported intensity IV
Nearest
Thurston County, 18 km SSE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 565 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 6 people have reported feeling it to USGS.

How big was it?

This earthquake released about 43 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 5.8 350,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 250,000× the energy of this one
  3. Around the size people start to feel M 3.0 22× the energy of this one
  4. This earthquake M 2.1 about 43 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 47.0985, -122.8792. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Thurston County, WA 18 km (11 mi) NNW of here earthquakes near Thurston County
Mason County, WA 36 km (22 mi) SE of here earthquakes near Mason County
Pierce County, WA 55 km (34 mi) W of here earthquakes near Pierce County
Kitsap County, WA 63 km (39 mi) SSW of here earthquakes near Kitsap County
Lewis County, WA 69 km (43 mi) NNW of here earthquakes near Lewis County
Grays Harbor County, WA 72 km (45 mi) E of here earthquakes near Grays Harbor County

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

Aftershocks so far

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

  1. 1.5 7 km ENE of Allyn, Washington
  2. 1.6 6 km WSW of La Grande, Washington
  3. 1.9 4 km NE of Home, Washington
  4. 2.1 0 km S of Skokomish, Washington
  5. 2.0 3 km WSW of Home, Washington
  6. 1.6 3 km SSW of Bethel, Washington
  7. 1.8 4 km N of Belfair, Washington
  8. 1.7 1 km SW of East Port Orchard, Washington
  9. 1.7 7 km WNW of Burley, Washington
  10. 1.9 6 km WNW of Hoodsport, Washington
  11. 3.2 3 km W of Skokomish, Washington
  12. 2.0 4 km E of Home, Washington
  13. 3.8 3 km WSW of Skokomish, Washington
  14. 1.6 12 km S of Shelton, Washington
  15. 1.5 1 km E of Dash Point, 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 970 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.