QuakeIndex

Earthquake · reviewed by a seismologist

M 3.0ml

12 km NE of Skamokawa Valley, Washington

· 16 km deep · released about 800 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Wahkiakum County 15 kmPacific County 42 kmCowlitz County 52 kmClatsop County 52 kmColumbia County 53 kmThurston County 70 kmLewis County 73 kmGrays Harbor County 90 kmClark 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 3.0 (ml)
Depth
16 km below the surface
Felt
7 reports · strongest reported intensity IV
Measured shaking
intensity II (ShakeMap)
Nearest
Wahkiakum County, 15 km SW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2959 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 7 people have reported feeling it to USGS.

How big was it?

This earthquake released about 800 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.0 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 420,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 19,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 13,000× the energy of this one
  4. This earthquake M 3.0 about 800 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 46.3955, -123.2907. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Wahkiakum County, WA 15 km (9 mi) NE of here earthquakes near Wahkiakum County
Pacific County, WA 42 km (26 mi) ESE of here earthquakes near Pacific County
Cowlitz County, WA 52 km (32 mi) WNW of here earthquakes near Cowlitz County
Clatsop County, OR 52 km (32 mi) NE of here earthquakes near Clatsop County
Columbia County, OR 53 km (33 mi) NNW of here earthquakes near Columbia County
Thurston County, WA 70 km (43 mi) SSW of here earthquakes near Thurston County

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

Aftershocks so far

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

  1. 1.6 1 km W of Winlock, Washington
  2. 2.3 3 km NNW of Winlock, Washington
  3. 1.6 10 km SSE of Toledo, Washington
  4. 1.9 10 km SSE of Toledo, Washington
  5. 1.6 12 km NW of West Longview, Washington
  6. 1.6 11 km SSW of Pe Ell, Washington
  7. 1.7 3 km NW of West Longview, Washington
  8. 1.6 4 km W of West Longview, Washington
  9. 1.8 3 km SW of Cathlamet, Washington
  10. 1.8 9 km NW of West Longview, Washington
  11. 1.8 4 km NW of West Longview, Washington
  12. 2.0 21 km WSW of Westport, Oregon
  13. 2.1 10 km WSW of Chehalis, Washington
  14. 1.5 3 km ENE of East Cathlamet, Washington
  15. 1.8 9 km S of Toledo, 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.