QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1ml

Washington

· 14 km deep · released about 43 lb of TNT

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10 km30 km60 km120 km N Lewis County 26 kmCowlitz County 36 kmSkamania County 45 kmClark County 67 kmThurston County 77 kmPierce County 77 kmColumbia County 78 kmWahkiakum County 89 kmMultnomah County 91 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
14 km below the surface
Felt
no reports yet
Nearest
Lewis County, 26 km NNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2503 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 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 46.3608, -122.2753. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Lewis County, WA 26 km (16 mi) SSE of here earthquakes near Lewis County
Cowlitz County, WA 36 km (22 mi) ENE of here earthquakes near Cowlitz County
Skamania County, WA 45 km (28 mi) NNW of here earthquakes near Skamania County
Clark County, WA 67 km (42 mi) NNE of here earthquakes near Clark County
Thurston County, WA 77 km (48 mi) SSE of here earthquakes near Thurston County
Pierce County, WA 77 km (48 mi) S of here earthquakes near Pierce County

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

Aftershocks so far

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

  1. 1.7 22 km S of Morton, Washington
  2. 1.7 7 km ESE of Ashford, Washington
  3. 1.6 7 km ESE of Ashford, Washington
  4. 1.8 20 km SSW of Morton, Washington
  5. 1.7 16 km NNE of Amboy, Washington
  6. 2.9 4 km W of Ashford, Washington
  7. 1.7 26 km N of Amboy, Washington
  8. 1.6 18 km SSE of Mossyrock, Washington
  9. 1.8 19 km WSW of Alder, Washington
  10. 1.6 5 km ESE of Mossyrock, Washington
  11. 1.7 21 km E of Castle Rock, Washington
  12. 1.6 10 km SSE of Toledo, Washington
  13. 1.6 21 km E of Castle Rock, Washington
  14. 2.1 9 km NNE of Mossyrock, Washington
  15. 1.7 21 km E of Castle Rock, 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.