QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8ml

20 km NNW of Carson, Washington

· 5.0 km deep · released about 13 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Skamania County 15 kmClark County 44 kmHood River County 48 kmMultnomah County 53 kmCowlitz County 66 kmLewis County 83 kmClackamas County 84 kmColumbia County 88 kmKlickitat 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 1.8 (ml)
Depth
5.0 km below the surface
Felt
no reports yet
Nearest
Skamania County, 15 km N
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2279 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 1,100,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 810,000× the energy of this one
  3. Around the size people start to feel M 3.0 72× 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 45.8937, -121.9395. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Skamania County, WA 15 km (9 mi) S of here earthquakes near Skamania County
Clark County, WA 44 km (28 mi) ENE of here earthquakes near Clark County
Hood River County, OR 48 km (30 mi) NNW of here earthquakes near Hood River County
Multnomah County, OR 53 km (33 mi) NE of here earthquakes near Multnomah County
Cowlitz County, WA 66 km (41 mi) ESE of here earthquakes near Cowlitz County
Lewis County, WA 83 km (52 mi) SSE of here earthquakes near Lewis 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. 1.7 36 km SSE of Morton, Washington
  2. 2.1 38 km NNE of Amboy, Washington
  3. 1.7 Washington-Oregon border region
  4. 1.6 31 km NNE of Amboy, Washington
  5. 1.6 4 km SSE of Odell, Oregon
  6. 2.0 3 km WSW of Yacolt, Washington
  7. 2.2 36 km SSE of Morton, Washington
  8. 1.5 3 km W of Yacolt, Washington
  9. 1.6 Washington-Oregon border region
  10. 1.9 3 km W of Yacolt, Washington
  11. 1.7 1 km WSW of Yacolt, Washington
  12. 1.5 8 km N of Amboy, Washington
  13. 1.6 3 km WSW of Yacolt, Washington
  14. 1.6 3 km SW of Yacolt, Washington
  15. 1.7 39 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.