QuakeIndex

Earthquake · reviewed by a seismologist

M 1.5ml

Earthquake near Lofall, WA

Yes: an earthquake was likely felt in Lofall in the last 24 hours. M 1.8, 8 km (5 mi) NNW of Lofall, at 12:24 pm PST on 12 November 2026 (20:24 UTC); the estimated shaking in Lofall was intensity II (weak). Every earthquake near Lofall

This page: a magnitude 1.5 earthquake was recorded 8 km (5 mi) west-northwest of Lofall, WA, at 4:44 am PDT on 8 September 2022 (11:44 UTC), 24 km deep. 3 people have reported feeling it to USGS.

USGS: 8 km WNW of Lofall, Washington

39 km (24 mi) NW of Seattle, WA · 32 km (20 mi) WNW of Shoreline, WA

4:44 am PDT, Sep 8, 2022 · · 24 km deep · released about 6.2 lb of TNT

10 km30 km60 km120 km N Kitsap County 23 kmIsland County 36 kmJefferson County 57 kmMason County 62 kmSnohomish County 78 kmSan Juan County 79 kmKing County 80 kmClallam County 89 kmPierce County 99 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
4:44 am PDT on 8 September 2022 ()
Where
8 km (5 mi) west-northwest of Lofall, WA · earthquakes near Lofall
Magnitude
M 1.5 (ml)
Depth
24 km below the surface
Felt
3 reports · strongest reported intensity II
Nearest
Kitsap County, 23 km SSE
Nearest mapped fault
Southern Whidbey Island fault, 22 km from its surface trace — near is not the same as on
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1459 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

At this magnitude and depth it was probably too small to be felt, even directly above it. In Lofall, 8 km away, the estimate is intensity II (weak). Estimated from magnitude, depth and distance with the intensity equation USGS Did You Feel It? uses; felt reports, where there are any, are the measurement.

Earthquakes near other towns within 30 km: Port Ludlow, Bangor Trident Base, Poulsbo, Hansville, Suquamish, Kingston.

How big was it?

This earthquake released about 6.2 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 1,700,000× the energy of this one
  3. Around the size people start to feel M 3.0 150× the energy of this one
  4. This earthquake M 1.5 about 6.2 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.

For this area

The largest earthquake within 50 km since 2016 was M 4.1 on 2017-02-23 — about 6,700 times the energy of this one.

Before 2016, the USGS record lists 2 earthquakes of M5 or more within 50 km:

  1. 6.1 Puget Sound region, Washington · 48 km S of this epicentre
  2. 5.3 Eastern Olympic Peninsula, Washington · 18 km WSW of this epicentre

Since 2016: the QuakeIndex catalogue (US, M1.5+), built from the USGS FDSN event service. Before 2016: USGS ComCat, M5+ from 1900. Distances are between epicentres. This is the record, not a forecast.

Where

Epicentre 47.8368, -122.7628. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Kitsap County, WA 23 km (15 mi) SSE earthquakes near Kitsap County
Island County, WA 36 km (23 mi) N earthquakes near Island County
Jefferson County, WA 57 km (36 mi) W earthquakes near Jefferson County
Mason County, WA 62 km (39 mi) SSW earthquakes near Mason County
Snohomish County, WA 78 km (49 mi) ENE earthquakes near Snohomish County
San Juan County, WA 79 km (49 mi) NNW earthquakes near San Juan 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. 1.9 4 km SW of Port Ludlow, Washington
  2. 1.6 3 km W of Belfair, Washington
  3. 1.6 3 km SSE of Quilcene, Washington
  4. 1.7 5 km SW of Port Ludlow, Washington
  5. 2.0 3 km N of White Center, Washington
  6. 1.6 3 km NW of Wauna, Washington
  7. 1.7 1 km NNW of River Road, Washington
  8. 2.3 6 km WSW of Shoreline, Washington
  9. 1.6 4 km W of Bainbridge Island, Washington
  10. 1.6 2 km NE of Esperance, Washington
  11. 1.6 3 km SSE of Quilcene, Washington
  12. 1.7 4 km NNW of White Center, Washington
  13. 1.7 2 km SSW of Gorst, Washington
  14. 1.5 5 km SW of Port Ludlow, Washington
  15. 1.9 2 km SSW 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.

On USGS

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