QuakeIndex

Earthquake · reviewed by a seismologist

M 2.0ml

13 km WSW of Longbranch, Washington

· 45 km deep · released about 31 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Thurston County 25 kmMason County 29 kmKitsap County 57 kmPierce County 59 kmGrays Harbor County 69 kmLewis County 76 kmJefferson County 86 kmKing County 89 kmPacific 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 2.0 (ml)
Depth
45 km below the surface
Felt
no reports yet
Nearest
Thurston County, 25 km SSE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1572 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

How big was it?

This earthquake released about 31 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.0 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 480,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 340,000× the energy of this one
  3. Around the size people start to feel M 3.0 31× the energy of this one
  4. This earthquake M 2.0 about 31 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 47.1578, -122.9112. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Thurston County, WA 25 km (16 mi) NNW of here earthquakes near Thurston County
Mason County, WA 29 km (18 mi) SE of here earthquakes near Mason County
Kitsap County, WA 57 km (35 mi) SSW of here earthquakes near Kitsap County
Pierce County, WA 59 km (36 mi) WNW of here earthquakes near Pierce County
Grays Harbor County, WA 69 km (43 mi) E of here earthquakes near Grays Harbor County
Lewis County, WA 76 km (47 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

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

  1. 1.6 10 km WNW of Belfair, Washington
  2. 1.7 4 km WNW of Vashon, Washington
  3. 1.5 1 km NNW of Oakville, Washington
  4. 1.9 10 km WNW of Allyn, Washington
  5. 1.6 8 km WSW of Tumwater, Washington
  6. 3.0 1 km NE of Gorst, Washington
  7. 1.6 2 km E of Oakville, Washington
  8. 3.1 Puget Sound region, Washington
  9. 2.1 10 km WNW of Longbranch, Washington
  10. 1.8 Olympic Peninsula, Washington
  11. 1.5 Puget Sound region, Washington
  12. 1.8 4 km S of Seabeck, Washington
  13. 2.1 14 km N of Hoodsport, Washington
  14. 1.7 2 km N of Oakville, Washington
  15. 1.7 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 1,300 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.