QuakeIndex

Earthquake · reviewed by a seismologist

M 1.5ml

7 km WNW of Lofall, Washington

· 25 km deep · released about 5.4 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Kitsap County 23 kmIsland County 37 kmJefferson County 57 kmMason County 61 kmSnohomish County 78 kmKing County 79 kmSan Juan County 80 kmClallam County 90 kmPierce County 98 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
25 km below the surface
Felt
no reports yet
Nearest
Kitsap County, 23 km SSE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1477 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 5.4 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 2,800,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 2,000,000× the energy of this one
  3. Around the size people start to feel M 3.0 180× the energy of this one
  4. This earthquake M 1.5 about 5.4 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 47.8280, -122.7602. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Kitsap County, WA 23 km (14 mi) NNW of here earthquakes near Kitsap County
Island County, WA 37 km (23 mi) S of here earthquakes near Island County
Jefferson County, WA 57 km (36 mi) E of here earthquakes near Jefferson County
Mason County, WA 61 km (38 mi) NNE of here earthquakes near Mason County
Snohomish County, WA 78 km (49 mi) WSW of here earthquakes near Snohomish County
King County, WA 79 km (49 mi) WNW of here earthquakes near King County

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

Aftershocks so far

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

  1. 1.6 4 km SE of Quilcene, Washington
  2. 1.7 Washington
  3. 1.9 2 km NW of Chico, Washington
  4. 3.1 6 km N of Camano, Washington
  5. 2.3 6 km SE of Port Ludlow, Washington
  6. 1.9 4 km SW of Port Ludlow, Washington
  7. 1.6 3 km W of Belfair, Washington
  8. 1.6 3 km SSE of Quilcene, Washington
  9. 1.7 5 km SW of Port Ludlow, Washington
  10. 2.0 3 km N of White Center, Washington
  11. 1.6 3 km NW of Wauna, Washington
  12. 1.7 1 km NNW of River Road, Washington
  13. 2.3 6 km WSW of Shoreline, Washington
  14. 1.6 4 km W of Bainbridge Island, Washington
  15. 1.6 2 km NE 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 4.1 on 2017-02-23 — it released about 7,700 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.