QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1ml

1 km WNW of Deer Island, Oregon

· 20 km deep · released about 46 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Columbia County 17 kmCowlitz County 32 kmClark County 34 kmWashington County 46 kmMultnomah County 55 kmWahkiakum County 59 kmClatsop County 66 kmSkamania County 71 kmLewis County 81 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
20 km below the surface
Felt
no reports yet
Nearest
Columbia County, 17 km W
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 565 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 46 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 5.8 330,000× 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 21× the energy of this one
  4. This earthquake M 2.1 about 46 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 45.9357, -122.8585. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Columbia County, OR 17 km (11 mi) E of here earthquakes near Columbia County
Cowlitz County, WA 32 km (20 mi) SSW of here earthquakes near Cowlitz County
Clark County, WA 34 km (21 mi) WNW of here earthquakes near Clark County
Washington County, OR 46 km (29 mi) NNE of here earthquakes near Washington County
Multnomah County, OR 55 km (34 mi) NW of here earthquakes near Multnomah County
Wahkiakum County, WA 59 km (37 mi) SE of here earthquakes near Wahkiakum County

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

Aftershocks so far

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

  1. 1.6 10 km NW of West Longview, Washington
  2. 1.7 2 km WNW of Yacolt, Washington
  3. 1.8 2 km ENE of Brush Prairie, Washington
  4. 1.8 6 km NE of Woodland, Washington
  5. 1.5 13 km SSE of Vernonia, Oregon
  6. 1.7 5 km ENE of Prescott, Oregon
  7. 1.7 3 km W of Columbia City, Oregon
  8. 1.8 4 km NNW of West Longview, Washington
  9. 1.7 Oregon
  10. 1.7 Washington-Oregon border region
  11. 1.6 31 km NNE of Amboy, Washington
  12. 2.0 3 km WSW of Yacolt, Washington
  13. 1.8 6 km SW of Clatskanie, Oregon
  14. 1.7 Washington-Oregon border region
  15. 1.7 Oregon

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.