QuakeIndex

Earthquake · reviewed by a seismologist

M 1.7ml

9 km NNW of Morton, Washington

· 18 km deep · released about 11 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Lewis County 8 kmPierce County 47 kmThurston County 51 kmCowlitz County 57 kmSkamania County 74 kmWahkiakum County 93 kmColumbia County 97 kmClark County 98 kmKing County 101 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 1.7 (ml)
Depth
18 km below the surface
Felt
no reports yet
Nearest
Lewis County, 8 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3011 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 11 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.7 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,300,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 930,000× the energy of this one
  3. Around the size people start to feel M 3.0 83× the energy of this one
  4. This earthquake M 1.7 about 11 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 46.6412, -122.3203. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Lewis County, WA 8 km (5 mi) NNE of here earthquakes near Lewis County
Pierce County, WA 47 km (29 mi) SSW of here earthquakes near Pierce County
Thurston County, WA 51 km (32 mi) SE of here earthquakes near Thurston County
Cowlitz County, WA 57 km (35 mi) NNE of here earthquakes near Cowlitz County
Skamania County, WA 74 km (46 mi) NNW of here earthquakes near Skamania County
Wahkiakum County, WA 93 km (58 mi) ENE of here earthquakes near Wahkiakum 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. 1.6 4 km W of Mossyrock, Washington
  2. 1.6 6 km SSW of Morton, Washington
  3. 1.6 6 km ESE of Ashford, Washington
  4. 2.2 23 km S of Morton, Washington
  5. 1.9 1 km E of Kapowsin, Washington
  6. 1.5 6 km SE of Onalaska, Washington
  7. 2.6 8 km E of Ashford, Washington
  8. 1.8 23 km SSE of Mossyrock, Washington
  9. 1.6 Washington
  10. 2.0 7 km ESE of Ashford, Washington
  11. 1.8 23 km SSE of Mossyrock, Washington
  12. 1.8 23 km SSE of Mossyrock, Washington
  13. 1.6 2 km SW of Kapowsin, Washington
  14. 1.6 Washington
  15. 2.1 15 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.