QuakeIndex

Earthquake · reviewed by a seismologist

M 2.9ml

Washington-Oregon border region

· 9.8 km deep · released about 570 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Skamania County 12 kmClark County 38 kmCowlitz County 53 kmMultnomah County 53 kmHood River County 60 kmLewis County 72 kmColumbia County 78 kmClackamas County 90 kmWashington County 91 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 2.9 (ml)
Depth
9.8 km below the surface
Felt
43 reports · strongest reported intensity IV
Measured shaking
intensity III (ShakeMap)
Nearest
Skamania County, 12 km NE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2069 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 43 people have reported feeling it to USGS.

How big was it?

This earthquake released about 570 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 27,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 19,000× the energy of this one
  3. Around the size people start to feel M 3.0 1.7× the energy of this one
  4. This earthquake M 2.9 about 570 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 45.9633, -122.0752. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Skamania County, WA 12 km (7 mi) SW of here earthquakes near Skamania County
Clark County, WA 38 km (24 mi) NE of here earthquakes near Clark County
Cowlitz County, WA 53 km (33 mi) ESE of here earthquakes near Cowlitz County
Multnomah County, OR 53 km (33 mi) NNE of here earthquakes near Multnomah County
Hood River County, OR 60 km (37 mi) NNW of here earthquakes near Hood River County
Lewis County, WA 72 km (45 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. 1.6 31 km NNE of Amboy, Washington
  2. 2.0 3 km WSW of Yacolt, Washington
  3. 2.2 36 km SSE of Morton, Washington
  4. 1.5 3 km W of Yacolt, Washington
  5. 1.6 Washington-Oregon border region
  6. 1.9 3 km W of Yacolt, Washington
  7. 1.7 1 km WSW of Yacolt, Washington
  8. 1.5 8 km N of Amboy, Washington
  9. 1.6 3 km WSW of Yacolt, Washington
  10. 1.6 3 km SW of Yacolt, Washington
  11. 1.7 39 km NNE of Amboy, Washington
  12. 1.6 3 km WSW of Yacolt, Washington
  13. 1.7 4 km WSW of Yacolt, Washington
  14. 2.4 Washington
  15. 1.5 26 km S of Morton, 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.