QuakeIndex

Earthquake · reviewed by a seismologist

M 1.7ml

11 km NNW of Morton, Washington

· 17 km deep · released about 10 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Lewis County 9 kmPierce County 46 kmThurston County 49 kmCowlitz County 58 kmSkamania County 76 kmWahkiakum County 93 kmColumbia County 98 kmClark County 99 kmKing 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 1.7 (ml)
Depth
17 km below the surface
Felt
no reports yet
Nearest
Lewis County, 9 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 641 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 10 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 1,500,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,000,000× the energy of this one
  3. Around the size people start to feel M 3.0 92× the energy of this one
  4. This earthquake M 1.7 about 10 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 46.6572, -122.3278. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Lewis County, WA 9 km (6 mi) NNE of here earthquakes near Lewis County
Pierce County, WA 46 km (28 mi) SSW of here earthquakes near Pierce County
Thurston County, WA 49 km (31 mi) SE of here earthquakes near Thurston County
Cowlitz County, WA 58 km (36 mi) NNE of here earthquakes near Cowlitz County
Skamania County, WA 76 km (47 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

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

  1. 1.5 4 km ESE of Mossyrock, Washington
  2. 1.8 7 km ESE of Mossyrock, Washington
  3. 1.9 5 km ESE of Mossyrock, Washington
  4. 1.8 5 km ESE of Mossyrock, Washington
  5. 1.7 12 km SSW of Alder, Washington
  6. 1.8 4 km ESE of McKenna, Washington
  7. 2.5 16 km NE of Ashford, Washington
  8. 1.7 1 km SE of Kapowsin, Washington
  9. 1.6 6 km ESE of Mossyrock, Washington
  10. 1.7 13 km N of Onalaska, Washington
  11. 2.3 38 km SSE of Morton, Washington
  12. 1.5 1 km WSW of Kapowsin, Washington
  13. 2.8 3 km NE of Mineral, Washington
  14. 1.9 6 km NE of Mossyrock, Washington
  15. 1.6 6 km ESE of Mossyrock, 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.