QuakeIndex

Earthquake · reviewed by a seismologist

M 3.3ml

33 km SE of Morton, Washington

· 7.0 km deep · released about 1.5 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Skamania County 32 kmLewis County 40 kmCowlitz County 51 kmClark County 69 kmPierce County 83 kmMultnomah County 90 kmColumbia County 91 kmThurston County 93 kmHood River 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 3.3 (ml)
Depth
7.0 km below the surface
Felt
9 reports · strongest reported intensity III
Measured shaking
intensity III (ShakeMap)
Nearest
Skamania County, 32 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3490 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 9 people have reported feeling it to USGS.

How big was it?

This earthquake released about 1.5 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.3 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 110,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 5,100× the energy of this one
  3. Magna, Utah 2020 M 5.7 3,600× the energy of this one
  4. This earthquake M 3.3 about 1.5 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 3.1× more

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 46.3088, -122.0318. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Skamania County, WA 32 km (20 mi) N of here earthquakes near Skamania County
Lewis County, WA 40 km (25 mi) SE of here earthquakes near Lewis County
Cowlitz County, WA 51 km (32 mi) ENE of here earthquakes near Cowlitz County
Clark County, WA 69 km (43 mi) NNE of here earthquakes near Clark County
Pierce County, WA 83 km (52 mi) S of here earthquakes near Pierce County
Multnomah County, OR 90 km (56 mi) NNE of here earthquakes near Multnomah County

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

Aftershocks so far

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

  1. 1.7 30 km ENE of Amboy, Washington
  2. 1.6 28 km ENE of Amboy, Washington
  3. 1.5 14 km ENE of Yacolt, Washington
  4. 1.6 3 km NE of Mossyrock, Washington
  5. 1.8 36 km SSE of Morton, Washington
  6. 1.6 17 km S of Morton, Washington
  7. 2.7 6 km WSW of Packwood, Washington
  8. 1.7 37 km SSE of Morton, Washington
  9. 2.2 15 km S of Morton, Washington
  10. 1.9 10 km WSW of Packwood, Washington
  11. 1.6 37 km SSE of Morton, Washington
  12. 1.8 5 km SW of Packwood, Washington
  13. 2.0 36 km SSE of Morton, Washington
  14. 2.0 37 km SSE of Morton, Washington
  15. 2.7 37 km SSE 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.