QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8ml

7 km SE of Mineral, Washington

· 22 km deep · released about 14 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Lewis County 22 kmPierce County 43 kmThurston County 62 kmCowlitz County 68 kmSkamania County 73 kmKing County 94 kmClark County 104 kmYakima County 108 kmWahkiakum County 108 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
22 km below the surface
Felt
no reports yet
Nearest
Lewis County, 22 km WSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 211 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 14 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 1,100,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 790,000× the energy of this one
  3. Around the size people start to feel M 3.0 70× the energy of this one
  4. This earthquake M 1.8 about 14 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 46.6677, -122.1165. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Lewis County, WA 22 km (14 mi) ENE of here earthquakes near Lewis County
Pierce County, WA 43 km (27 mi) S of here earthquakes near Pierce County
Thurston County, WA 62 km (39 mi) ESE of here earthquakes near Thurston County
Cowlitz County, WA 68 km (42 mi) NE of here earthquakes near Cowlitz County
Skamania County, WA 73 km (45 mi) N of here earthquakes near Skamania County
King County, WA 94 km (58 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

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

  1. 0.3 11 km SSE of Carbonado, Washington
  2. 0.3 18 km SSE of Carbonado, Washington
  3. 0.7 5 km SSW of Morton, Washington
  4. 0.1 20 km SE of Carbonado, Washington
  5. 0.3 12 km NNE of Ashford, Washington
  6. 2.1 3 km NNW of Kapowsin, Washington
  7. 1.0 4 km WSW of Mineral, Washington
  8. 1.3 14 km NNE of Ashford, Washington
  9. 1.2 12 km S of Rainier, Washington
  10. 0.8 26 km NNE of Packwood, Washington
  11. 0.6 26 km NNE of Packwood, Washington
  12. 1.1 5 km SW of Morton, Washington
  13. 1.5 5 km SSW of Morton, Washington
  14. -0.1 16 km NNE of Ashford, Washington
  15. -0.5 22 km ENE 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.