QuakeIndex

Earthquake · reviewed by a seismologist

M 2.7ml

0 km WSW of Klahanie, Washington

· 22 km deep · released about 380 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N King County 16 kmKitsap County 48 kmSnohomish County 57 kmPierce County 59 kmIsland County 82 kmMason County 90 kmThurston County 94 kmSkagit County 104 kmChelan County 109 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
22 km below the surface
Felt
68 reports · strongest reported intensity IV
Measured shaking
intensity III (ShakeMap)
Nearest
King County, 16 km ESE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2324 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 68 people have reported feeling it to USGS.

How big was it?

This earthquake released about 380 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 40,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 29,000× 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 380 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 47.5690, -122.0137. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
King County, WA 16 km (10 mi) WNW of here earthquakes near King County
Kitsap County, WA 48 km (30 mi) E of here earthquakes near Kitsap County
Snohomish County, WA 57 km (35 mi) SSW of here earthquakes near Snohomish County
Pierce County, WA 59 km (36 mi) N of here earthquakes near Pierce County
Island County, WA 82 km (51 mi) SE of here earthquakes near Island County
Mason County, WA 90 km (56 mi) ENE of here earthquakes near Mason County

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

Aftershocks so far

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

  1. 1.8 5 km W of Wilderness Rim, Washington
  2. 1.6 3 km SSE of May Creek, Washington
  3. 2.7 11 km SW of Index, Washington
  4. 1.7 3 km SSW of Roosevelt, Washington
  5. 2.3 4 km NNW of Lakeland North, Washington
  6. 1.6 3 km ESE of Klahanie, Washington
  7. 2.7 2 km S of Ravensdale, Washington
  8. 1.7 2 km NNW of Indianola, Washington
  9. 1.8 10 km ESE of Enumclaw, Washington
  10. 2.0 3 km SW of Wilderness Rim, Washington
  11. 2.5 3 km SW of Woodway, Washington
  12. 2.3 2 km SE of Carnation, Washington
  13. 1.7 13 km W of Greenwater, Washington
  14. 1.7 1 km SW of Echo Lake, Washington
  15. 1.8 3 km N of Cathcart, 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.

For this area

The largest earthquake within 50 km in our catalogue was M 4.6 on 2019-07-12 — it released about 600 times the energy of this one.

From the QuakeIndex catalogue, built from the USGS FDSN event service.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.