QuakeIndex

Earthquake · reviewed by a seismologist

M 1.6ml

5 km ESE of Mossyrock, Washington

· 16 km deep · released about 6.6 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Lewis County 9 kmCowlitz County 39 kmThurston County 57 kmSkamania County 64 kmPierce County 64 kmWahkiakum County 80 kmColumbia County 80 kmClark County 81 kmPacific County 104 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 1.6 (ml)
Depth
16 km below the surface
Felt
1 report · strongest reported intensity II
Nearest
Lewis County, 9 km NNE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 567 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 1 person has reported feeling it to USGS.

How big was it?

This earthquake released about 6.6 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.6 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 2,300,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,600,000× the energy of this one
  3. Around the size people start to feel M 3.0 140× the energy of this one
  4. This earthquake M 1.6 about 6.6 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 46.5017, -122.4227. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Lewis County, WA 9 km (6 mi) SSW of here earthquakes near Lewis County
Cowlitz County, WA 39 km (24 mi) NNE of here earthquakes near Cowlitz County
Thurston County, WA 57 km (36 mi) SSE of here earthquakes near Thurston County
Skamania County, WA 64 km (40 mi) NW of here earthquakes near Skamania County
Pierce County, WA 64 km (40 mi) SSW of here earthquakes near Pierce County
Wahkiakum County, WA 80 km (50 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

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

  1. 1.6 31 km NNE of Amboy, Washington
  2. 2.9 12 km NW of Morton, Washington
  3. 1.6 5 km WNW of Ashford, Washington
  4. 1.6 6 km ENE of Elbe, Washington
  5. 1.8 7 km WSW of Morton, Washington
  6. 2.7 7 km WSW of Morton, Washington
  7. 1.6 10 km SSE of Mossyrock, Washington
  8. 1.8 5 km NNW of Winlock, Washington
  9. 1.7 23 km S of Morton, Washington
  10. 2.0 19 km N of Amboy, Washington
  11. 2.0 7 km NE of Ashford, Washington
  12. 1.6 18 km N of Mossyrock, Washington
  13. 2.1 7 km NE of Ashford, Washington
  14. 1.5 37 km NNE of Amboy, Washington
  15. 1.7 10 km NE of Castle Rock, 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.