QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1ml

9 km ENE of Kalama, Washington

· 17 km deep · released about 41 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Cowlitz County 18 kmColumbia County 29 kmClark County 35 kmMultnomah County 59 kmSkamania County 60 kmWahkiakum County 61 kmWashington County 61 kmLewis County 66 kmClatsop County 76 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
17 km below the surface
Felt
no reports yet
Nearest
Cowlitz County, 18 km NNE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1438 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 41 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 5.8 370,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 260,000× the energy of this one
  3. Around the size people start to feel M 3.0 23× the energy of this one
  4. This earthquake M 2.1 about 41 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 46.0373, -122.7252. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Cowlitz County, WA 18 km (11 mi) SSW of here earthquakes near Cowlitz County
Columbia County, OR 29 km (18 mi) ENE of here earthquakes near Columbia County
Clark County, WA 35 km (22 mi) NNW of here earthquakes near Clark County
Multnomah County, OR 59 km (37 mi) NNW of here earthquakes near Multnomah County
Skamania County, WA 60 km (37 mi) W of here earthquakes near Skamania County
Wahkiakum County, WA 61 km (38 mi) ESE of here earthquakes near Wahkiakum County

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

Aftershocks so far

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

  1. 1.5 13 km SSE of Vernonia, Oregon
  2. 1.6 23 km S of Morton, Washington
  3. 1.7 5 km ENE of Prescott, Oregon
  4. 1.7 3 km W of Columbia City, Oregon
  5. 1.6 19 km SSW of Mossyrock, Washington
  6. 1.8 4 km NNW of West Longview, Washington
  7. 2.1 38 km NNE of Amboy, Washington
  8. 1.7 Washington-Oregon border region
  9. 1.6 31 km NNE of Amboy, Washington
  10. 2.0 3 km WSW of Yacolt, Washington
  11. 1.8 6 km SW of Clatskanie, Oregon
  12. 1.7 Washington-Oregon border region
  13. 1.7 Oregon
  14. 1.9 Washington-Oregon border region
  15. 1.7 3 km NW of West Longview, 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.