QuakeIndex

Earthquake · reviewed by a seismologist

M 3.2ml

12 km SSW of Morton, Washington

· 12 km deep · released about 2,000 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Lewis County 15 kmCowlitz County 39 kmSkamania County 55 kmThurston County 66 kmPierce County 68 kmClark County 76 kmColumbia County 81 kmWahkiakum County 86 kmMultnomah County 100 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 3.2 (ml)
Depth
12 km below the surface
Felt
34 reports · strongest reported intensity IV
Measured shaking
intensity III (ShakeMap)
Nearest
Lewis County, 15 km NNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3400 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 34 people have reported feeling it to USGS.

How big was it?

This earthquake released about 2,000 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.2 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 170,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 7,700× the energy of this one
  3. Magna, Utah 2020 M 5.7 5,400× the energy of this one
  4. This earthquake M 3.2 about 2,000 lb of TNT
  5. Around the size people start to feel M 3.0 this one released 2.1× 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 46.4483, -122.3320. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Lewis County, WA 15 km (9 mi) SSE of here earthquakes near Lewis County
Cowlitz County, WA 39 km (24 mi) NE of here earthquakes near Cowlitz County
Skamania County, WA 55 km (34 mi) NNW of here earthquakes near Skamania County
Thurston County, WA 66 km (41 mi) SE of here earthquakes near Thurston County
Pierce County, WA 68 km (43 mi) SSW of here earthquakes near Pierce County
Clark County, WA 76 km (47 mi) N of here earthquakes near Clark County

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

Aftershocks so far

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

  1. 2.0 7 km S of Morton, Washington
  2. 1.9 10 km S of Onalaska, Washington
  3. 1.7 14 km SSE of Mossyrock, Washington
  4. 3.0 28 km ENE of Amboy, Washington
  5. 1.7 30 km ENE of Amboy, Washington
  6. 1.6 28 km ENE of Amboy, Washington
  7. 1.6 3 km NE of Mossyrock, Washington
  8. 2.0 4 km ENE of Ashford, Washington
  9. 1.8 36 km SSE of Morton, Washington
  10. 1.6 17 km S of Morton, Washington
  11. 1.7 37 km SSE of Morton, Washington
  12. 2.2 15 km S of Morton, Washington
  13. 1.9 10 km WSW of Packwood, Washington
  14. 1.6 37 km SSE of Morton, Washington
  15. 2.0 36 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.