QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8ml

11 km NNW of Carson, Washington

· 9.3 km deep · released about 16 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Skamania County 24 kmHood River County 38 kmClark County 47 kmMultnomah County 51 kmCowlitz County 75 kmClackamas County 77 kmKlickitat County 86 kmWasco County 91 kmLewis County 93 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
9.3 km below the surface
Felt
no reports yet
Nearest
Skamania County, 24 km NNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 880 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 16 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 5.8 930,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 660,000× the energy of this one
  3. Around the size people start to feel M 3.0 59× the energy of this one
  4. This earthquake M 1.8 about 16 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 45.8140, -121.8853. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Skamania County, WA 24 km (15 mi) SSE of here earthquakes near Skamania County
Hood River County, OR 38 km (24 mi) NNW of here earthquakes near Hood River County
Clark County, WA 47 km (29 mi) E of here earthquakes near Clark County
Multnomah County, OR 51 km (32 mi) NE of here earthquakes near Multnomah County
Cowlitz County, WA 75 km (46 mi) SE of here earthquakes near Cowlitz County
Clackamas County, OR 77 km (48 mi) NNE of here earthquakes near Clackamas County

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

Aftershocks so far

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

  1. 0.2 37 km NNE of Amboy, Washington
  2. 0.5 38 km NNE of Amboy, Washington
  3. 0.6 38 km NNE of Amboy, Washington
  4. 0.3 32 km NE of Amboy, Washington
  5. 1.3 38 km NNE of Amboy, Washington
  6. 0.0 38 km NE of Amboy, Washington
  7. 1.5 37 km NNE of Amboy, Washington
  8. 2.2 27 km ENE of Yacolt, Washington
  9. 2.3 37 km NNE of Amboy, Washington
  10. 2.6 18 km NE of Amboy, Washington
  11. 1.5 37 km NNE of Amboy, Washington
  12. 1.6 38 km NE of Amboy, Washington
  13. 1.9 38 km NE of Amboy, Washington
  14. 1.7 4 km NNW of Mount Hood Village, Oregon
  15. 1.5 2 km SSW of Yacolt, 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.