QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1ml

9 km NNE of Mossyrock, Washington

· 12 km deep · released about 47 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Lewis County 6 kmThurston County 47 kmCowlitz County 49 kmPierce County 54 kmSkamania County 75 kmWahkiakum County 83 kmColumbia County 89 kmClark County 93 kmMason County 100 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
12 km below the surface
Felt
1 report · strongest reported intensity III
Nearest
Lewis County, 6 km ESE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 567 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 47 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 5.8 320,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 230,000× the energy of this one
  3. Around the size people start to feel M 3.0 20× the energy of this one
  4. This earthquake M 2.1 about 47 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 46.6067, -122.4405. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Lewis County, WA 6 km (4 mi) WNW of here earthquakes near Lewis County
Thurston County, WA 47 km (29 mi) SE of here earthquakes near Thurston County
Cowlitz County, WA 49 km (31 mi) NNE of here earthquakes near Cowlitz County
Pierce County, WA 54 km (34 mi) SSW of here earthquakes near Pierce County
Skamania County, WA 75 km (46 mi) NNW of here earthquakes near Skamania County
Wahkiakum County, WA 83 km (52 mi) ENE of here earthquakes near Wahkiakum 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. 2.1 7 km NE of Ashford, Washington
  2. 1.5 37 km NNE of Amboy, Washington
  3. 1.6 1 km WNW of Kapowsin, Washington
  4. 1.7 10 km NE of Castle Rock, Washington
  5. 1.9 10 km ENE of Ashford, Washington
  6. 1.6 1 km W of Winlock, Washington
  7. 1.7 2 km WNW of Kapowsin, Washington
  8. 1.6 16 km NNE of Ashford, Washington
  9. 2.3 15 km NNE of Ashford, Washington
  10. 1.8 10 km NE of Castle Rock, Washington
  11. 1.6 9 km NE of Castle Rock, Washington
  12. 1.9 3 km WNW of Winlock, Washington
  13. 1.6 2 km ESE of Kapowsin, Washington
  14. 1.9 12 km NNE of Ashford, Washington
  15. 1.6 11 km NE of Ashford, 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.