QuakeIndex

explosion · reviewed by a seismologist

M 1.9md

2 km NE of Tanglewilde-Thompson Place, Washington

· -0.3 km deep · released about 25 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Thurston County 15 kmMason County 45 kmPierce County 46 kmLewis County 61 kmKitsap County 65 kmGrays Harbor County 81 kmKing County 84 kmPacific County 96 kmCowlitz County 96 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 1.9 (md)
Depth
-0.3 km below the surface
Felt
no reports yet
Nearest
Thurston County, 15 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1564 days ago

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

USGS catalogues this as explosion, not an earthquake.

How big was it?

This earthquake released about 25 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 620,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 440,000× the energy of this one
  3. Around the size people start to feel M 3.0 39× the energy of this one
  4. This earthquake M 1.9 about 25 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 47.0623, -122.7577. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Thurston County, WA 15 km (9 mi) NNE of here earthquakes near Thurston County
Mason County, WA 45 km (28 mi) SE of here earthquakes near Mason County
Pierce County, WA 46 km (28 mi) W of here earthquakes near Pierce County
Lewis County, WA 61 km (38 mi) NNW of here earthquakes near Lewis County
Kitsap County, WA 65 km (40 mi) S of here earthquakes near Kitsap County
Grays Harbor County, WA 81 km (50 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

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

  1. 1.7 7 km SSW of Shelton, Washington
  2. 1.6 5 km WSW of La Grande, Washington
  3. 1.6 2 km NW of Oakville, Washington
  4. 1.7 0 km S of Belfair, Washington
  5. 2.0 1 km SSE of Dash Point, Washington
  6. 1.7 4 km WNW of Vashon, Washington
  7. 1.5 1 km NNW of Oakville, Washington
  8. 1.9 10 km WNW of Allyn, Washington
  9. 1.6 8 km WSW of Tumwater, Washington
  10. 1.6 2 km E of Oakville, Washington
  11. 3.1 Puget Sound region, Washington
  12. 1.5 10 km ESE of Centralia, Washington
  13. 2.1 10 km WNW of Longbranch, Washington
  14. 1.6 1 km SSE of Kapowsin, Washington
  15. 1.8 Olympic Peninsula, 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.

On USGS

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