QuakeIndex

Earthquake · reviewed by a seismologist

M 2.8ml

3 km NE of Mineral, Washington

· 17 km deep · released about 550 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Lewis County 24 kmPierce County 35 kmThurston County 56 kmCowlitz County 72 kmSkamania County 80 kmKing County 88 kmMason County 104 kmKitsap County 108 kmWahkiakum County 109 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 2.8 (ml)
Depth
17 km below the surface
Felt
6 reports · strongest reported intensity III
Measured shaking
intensity II (ShakeMap)
Nearest
Lewis County, 24 km SW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 299 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 6 people have reported feeling it to USGS.

How big was it?

This earthquake released about 550 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 28,000× 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 2.8 about 550 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 46.7325, -122.1500. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Lewis County, WA 24 km (15 mi) NE of here earthquakes near Lewis County
Pierce County, WA 35 km (22 mi) S of here earthquakes near Pierce County
Thurston County, WA 56 km (35 mi) ESE of here earthquakes near Thurston County
Cowlitz County, WA 72 km (45 mi) NE of here earthquakes near Cowlitz County
Skamania County, WA 80 km (50 mi) N of here earthquakes near Skamania County
King County, WA 88 km (54 mi) SSW of here earthquakes near King County

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

Aftershocks so far

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

  1. 0.9 10 km SW of Packwood, Washington
  2. 1.5 11 km NE of Ashford, Washington
  3. 1.7 6 km W of Mossyrock, Washington
  4. 1.8 3 km SW of Kapowsin, Washington
  5. 1.6 8 km E of Ashford, Washington
  6. 1.7 8 km E of Ashford, Washington
  7. 2.4 8 km E of Ashford, Washington
  8. 2.2 23 km ENE of Ashford, Washington
  9. 1.5 0 km NNW of Eatonville, Washington
  10. 1.7 1 km SW of Kapowsin, Washington
  11. 1.6 3 km ESE of Buckley, Washington
  12. 1.6 3 km S of Packwood, Washington
  13. 1.6 9 km S of Mossyrock, Washington
  14. 1.6 1 km SSE of Kapowsin, Washington
  15. 1.5 11 km NNE of Ashford, 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.