QuakeIndex

Earthquake · reviewed by a seismologist

M 1.9ml

4 km WSW of Winlock, Washington

· 19 km deep · released about 19 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Wahkiakum County 39 kmCowlitz County 40 kmLewis County 49 kmThurston County 52 kmColumbia County 60 kmPacific County 61 kmClatsop County 74 kmClark County 88 kmPierce County 90 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 (ml)
Depth
19 km below the surface
Felt
no reports yet
Nearest
Wahkiakum County, 39 km WSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 384 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 19 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 5.8 790,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 560,000× the energy of this one
  3. Around the size people start to feel M 3.0 50× the energy of this one
  4. This earthquake M 1.9 about 19 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 46.4795, -122.9967. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Wahkiakum County, WA 39 km (24 mi) ENE of here earthquakes near Wahkiakum County
Cowlitz County, WA 40 km (25 mi) NW of here earthquakes near Cowlitz County
Lewis County, WA 49 km (30 mi) WSW of here earthquakes near Lewis County
Thurston County, WA 52 km (33 mi) SSW of here earthquakes near Thurston County
Columbia County, OR 60 km (37 mi) N of here earthquakes near Columbia County
Pacific County, WA 61 km (38 mi) E of here earthquakes near Pacific County

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

Aftershocks so far

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

  1. 1.3 20 km E of Castle Rock, Washington
  2. 1.2 12 km S of Rainier, Washington
  3. 0.7 21 km ESE of Castle Rock, Washington
  4. 0.9 20 km E of Castle Rock, Washington
  5. 0.6 21 km ESE of Castle Rock, Washington
  6. 1.5 31 km E of Kelso, Washington
  7. 1.7 20 km E of Castle Rock, Washington
  8. 1.7 6 km W of Mossyrock, Washington
  9. 3.8 20 km E of Castle Rock, Washington
  10. 1.6 6 km NE of Rochester, Washington
  11. 1.6 20 km E of Castle Rock, Washington
  12. 1.5 11 km ENE of East Cathlamet, Washington
  13. 1.6 9 km S of Mossyrock, Washington
  14. 1.5 6 km NW of Winlock, Washington
  15. 1.7 1 km E of Oakville, 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.