QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8ml

2 km NE of Deer Island, Oregon

· 21 km deep · released about 13 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Columbia County 20 kmCowlitz County 30 kmClark County 32 kmWashington County 49 kmMultnomah County 54 kmWahkiakum County 61 kmSkamania County 68 kmClatsop County 69 kmLewis County 78 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 1.8 (ml)
Depth
21 km below the surface
Felt
no reports yet
Nearest
Columbia County, 20 km W
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2190 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 13 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,200,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 840,000× the energy of this one
  3. Around the size people start to feel M 3.0 75× the energy of this one
  4. This earthquake M 1.8 about 13 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 45.9458, -122.8198. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Columbia County, OR 20 km (13 mi) E of here earthquakes near Columbia County
Cowlitz County, WA 30 km (19 mi) SSW of here earthquakes near Cowlitz County
Clark County, WA 32 km (20 mi) NW of here earthquakes near Clark County
Washington County, OR 49 km (30 mi) NNE of here earthquakes near Washington County
Multnomah County, OR 54 km (34 mi) NW of here earthquakes near Multnomah County
Wahkiakum County, WA 61 km (38 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. 2.0 4 km SE of Mill Plain, Washington
  2. 2.1 11 km ENE of Prescott, Oregon
  3. 1.6 4 km NNW of Lewisville, Washington
  4. 2.6 3 km SE of Mill Plain, Washington
  5. 1.6 15 km E of Castle Rock, Washington
  6. 1.6 9 km NE of Vernonia, Oregon
  7. 1.7 1 km WSW of Kalama, Washington
  8. 2.0 21 km E of Castle Rock, Washington
  9. 1.6 2 km ESE of Lewisville, Washington
  10. 2.8 21 km E of Castle Rock, Washington
  11. 1.5 21 km E of Castle Rock, Washington
  12. 2.5 21 km E of Castle Rock, Washington
  13. 1.5 28 km N of Amboy, Washington
  14. 1.7 2 km WSW of Columbia City, Oregon
  15. 1.7 16 km NNE of Amboy, 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.