QuakeIndex

Earthquake · reviewed by a seismologist

M 1.5ml

3 km NE of Fall City, Washington

· 19 km deep · released about 5.9 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N King County 12 kmSnohomish County 52 kmKitsap County 60 kmPierce County 64 kmIsland County 87 kmChelan County 97 kmSkagit County 100 kmMason County 103 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 1.5 (ml)
Depth
19 km below the surface
Felt
no reports yet
Nearest
King County, 12 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 567 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 5.9 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 2,500,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,800,000× the energy of this one
  3. Around the size people start to feel M 3.0 160× the energy of this one
  4. This earthquake M 1.5 about 5.9 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 47.5947, -121.8563. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
King County, WA 12 km (7 mi) N of here earthquakes near King County
Snohomish County, WA 52 km (32 mi) S of here earthquakes near Snohomish County
Kitsap County, WA 60 km (37 mi) E of here earthquakes near Kitsap County
Pierce County, WA 64 km (40 mi) NNE of here earthquakes near Pierce County
Island County, WA 87 km (54 mi) SE of here earthquakes near Island County
Chelan County, WA 97 km (60 mi) WSW of here earthquakes near Chelan 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. 1.7 5 km SW of Seattle, Washington
  2. 1.8 1 km W of Redmond, Washington
  3. 1.6 11 km SSW of Gold Bar, Washington
  4. 1.5 13 km W of Greenwater, Washington
  5. 2.4 7 km ENE of Fall City, Washington
  6. 2.0 7 km NE of Fall City, Washington
  7. 2.0 3 km SE of Issaquah, Washington
  8. 1.5 3 km NNE of Picnic Point, Washington
  9. 1.6 1 km SW of Bothell East, Washington
  10. 1.8 1 km SW of Monroe North, Washington
  11. 1.9 Washington
  12. 1.7 12 km W of Greenwater, Washington
  13. 1.6 6 km SW of Des Moines, Washington
  14. 1.5 5 km NNE of Duvall, Washington
  15. 1.9 1 km ESE of Esperance, 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 38,000 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.