QuakeIndex

Earthquake · reviewed by a seismologist

M 2.7ml

16 km NE of Ashford, Washington

· 7.8 km deep · released about 390 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Pierce County 28 kmLewis County 49 kmKing County 69 kmThurston County 72 kmSkamania County 94 kmCowlitz County 96 kmKittitas County 96 kmYakima County 99 kmKitsap 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 2.7 (ml)
Depth
7.8 km below the surface
Felt
8 reports · strongest reported intensity IV
Nearest
Pierce County, 28 km NW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 507 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 8 people have reported feeling it to USGS.

How big was it?

This earthquake released about 390 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.7 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 39,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 28,000× the energy of this one
  3. Around the size people start to feel M 3.0 2.5× the energy of this one
  4. This earthquake M 2.7 about 390 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 46.8693, -121.8907. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Pierce County, WA 28 km (18 mi) SE of here earthquakes near Pierce County
Lewis County, WA 49 km (31 mi) NE of here earthquakes near Lewis County
King County, WA 69 km (43 mi) S of here earthquakes near King County
Thurston County, WA 72 km (45 mi) E of here earthquakes near Thurston County
Skamania County, WA 94 km (58 mi) N of here earthquakes near Skamania County
Cowlitz County, WA 96 km (60 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

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

  1. 1.7 2 km SE of Kapowsin, Washington
  2. 1.6 12 km ESE of Enumclaw, Washington
  3. 2.2 13 km NNE of Ashford, Washington
  4. 1.5 1 km SSE of Kapowsin, Washington
  5. 1.9 5 km E of Enumclaw, Washington
  6. 1.6 1 km WNW of Kapowsin, Washington
  7. 1.6 24 km NNE of Packwood, Washington
  8. 1.5 5 km WSW of Black Diamond, Washington
  9. 1.5 2 km ESE of Buckley, Washington
  10. 1.7 0 km WSW of Kapowsin, Washington
  11. 1.7 12 km E of Wilkeson, Washington
  12. 1.6 1 km SE of Kapowsin, Washington
  13. 1.5 15 km NNE of Ashford, Washington
  14. 1.5 19 km SSE of Carbonado, Washington
  15. 1.8 17 km SE of Carbonado, 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.