QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8ml

4 km SE of Ames Lake, Washington

· 25 km deep · released about 13 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N King County 14 kmSnohomish County 52 kmKitsap County 54 kmPierce County 63 kmIsland County 83 kmMason County 97 kmSkagit County 100 kmThurston County 100 kmChelan County 102 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 1.8 (ml)
Depth
25 km below the surface
Felt
2 reports · strongest reported intensity III
Nearest
King County, 14 km SSE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3190 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 2 people have reported feeling it to USGS.

How big was it?

This earthquake released about 13 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,200,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 840,000× the energy of this one
  3. Around the size people start to feel M 3.0 75× the energy of this one
  4. This earthquake M 1.8 about 13 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 47.6012, -121.9302. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
King County, WA 14 km (9 mi) NNW of here earthquakes near King County
Snohomish County, WA 52 km (32 mi) SSW of here earthquakes near Snohomish County
Kitsap County, WA 54 km (34 mi) E of here earthquakes near Kitsap County
Pierce County, WA 63 km (39 mi) NNE of here earthquakes near Pierce County
Island County, WA 83 km (52 mi) SE of here earthquakes near Island County
Mason County, WA 97 km (61 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

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

  1. 2.2 5 km ENE of Lake Roesiger, Washington
  2. 2.2 0 km S of Union Hill-Novelty Hill, Washington
  3. 1.7 1 km WSW of Mountlake Terrace, Washington
  4. 1.7 11 km ESE of Enumclaw, Washington
  5. 2.2 15 km NE of May Creek, Washington
  6. 2.0 11 km ENE of Enumclaw, Washington
  7. 1.7 3 km NE of Southworth, Washington
  8. 2.1 4 km ENE of Dash Point, Washington
  9. 1.6 2 km NE of Shoreline, Washington
  10. 1.5 3 km SSE of Des Moines, Washington
  11. 2.1 6 km E of Carnation, Washington
  12. 1.6 4 km NE of Bainbridge Island, Washington
  13. 1.9 3 km E of Indianola, Washington
  14. 1.5 7 km ESE of Carnation, Washington
  15. 1.9 1 km SE of Dash Point, 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.