QuakeIndex

Earthquake · reviewed by a seismologist

M 1.6ml

15 km NE of Ashford, Washington

· 9.5 km deep · released about 7.8 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Pierce County 29 kmLewis County 48 kmKing County 70 kmThurston County 71 kmSkamania County 93 kmCowlitz County 95 kmKittitas County 97 kmYakima County 99 kmKitsap 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
9.5 km below the surface
Felt
no reports yet
Nearest
Pierce County, 29 km NW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2803 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 7.8 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 1,900,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,400,000× the energy of this one
  3. Around the size people start to feel M 3.0 120× the energy of this one
  4. This earthquake M 1.6 about 7.8 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 46.8587, -121.8992. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Pierce County, WA 29 km (18 mi) SE of here earthquakes near Pierce County
Lewis County, WA 48 km (30 mi) NE of here earthquakes near Lewis County
King County, WA 70 km (44 mi) S of here earthquakes near King County
Thurston County, WA 71 km (44 mi) E of here earthquakes near Thurston County
Skamania County, WA 93 km (58 mi) N of here earthquakes near Skamania County
Cowlitz County, WA 95 km (59 mi) NE of here earthquakes near Cowlitz County

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

Aftershocks so far

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

  1. 1.7 12 km W of Greenwater, Washington
  2. 1.8 23 km ENE of Ashford, Washington
  3. 1.8 10 km ESE of Enumclaw, Washington
  4. 1.7 13 km W of Greenwater, Washington
  5. 1.8 8 km E of Ashford, Washington
  6. 1.6 6 km ESE of Ashford, Washington
  7. 1.8 17 km ESE of Packwood, Washington
  8. 1.9 1 km E of Kapowsin, Washington
  9. 2.6 8 km E of Ashford, Washington
  10. 1.6 17 km ESE of Packwood, Washington
  11. 1.6 Washington
  12. 2.0 7 km ESE of Ashford, Washington
  13. 2.0 0 km SE of Carbonado, Washington
  14. 1.6 2 km SW of Kapowsin, Washington
  15. 1.7 12 km W of Greenwater, 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.