QuakeIndex

Earthquake · reviewed by a seismologist

M 1.6ml

15 km N of Ashford, Washington

· 6.5 km deep · released about 8.7 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Pierce County 21 kmLewis County 46 kmThurston County 64 kmKing County 67 kmCowlitz County 94 kmKitsap County 96 kmSkamania County 97 kmMason County 102 kmKittitas County 103 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
6.5 km below the surface
Felt
no reports yet
Nearest
Pierce County, 21 km NW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2087 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 8.7 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 1,700,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,200,000× the energy of this one
  3. Around the size people start to feel M 3.0 110× the energy of this one
  4. This earthquake M 1.6 about 8.7 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 46.8998, -121.9930. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Pierce County, WA 21 km (13 mi) SE of here earthquakes near Pierce County
Lewis County, WA 46 km (29 mi) NE of here earthquakes near Lewis County
Thurston County, WA 64 km (40 mi) E of here earthquakes near Thurston County
King County, WA 67 km (41 mi) S of here earthquakes near King County
Cowlitz County, WA 94 km (58 mi) NNE of here earthquakes near Cowlitz County
Kitsap County, WA 96 km (60 mi) SSE of here earthquakes near Kitsap 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. 2.3 6 km NE of Ashford, Washington
  2. 1.5 13 km W of Greenwater, Washington
  3. 1.9 14 km WSW of Alder, Washington
  4. 1.6 23 km ENE of Ashford, Washington
  5. 1.7 17 km NNE of Packwood, Washington
  6. 1.7 12 km W of Greenwater, Washington
  7. 1.5 10 km ESE of Enumclaw, Washington
  8. 1.6 6 km WSW of La Grande, Washington
  9. 1.5 11 km ESE of Enumclaw, Washington
  10. 2.0 5 km WNW of Packwood, Washington
  11. 1.7 7 km ESE of Ashford, Washington
  12. 1.6 7 km ESE of Ashford, Washington
  13. 2.3 14 km NNE of Ashford, Washington
  14. 1.8 14 km NNE of Ashford, Washington
  15. 1.5 1 km SSW of Ravensdale, 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.