QuakeIndex

Earthquake · reviewed by a seismologist

M 1.7ml

Earthquake near White Center, WA

No earthquake was likely felt in White Center in the 24 hours to 10:59 am PST (18:59 UTC). The last one was M 4.2, 31 km (19 mi) WSW, at 2:05 pm PDT on 29 September 2026, estimated intensity III (weak) in town; 9,329 felt reports to USGS. Every earthquake near White Center

This page: a magnitude 1.7 earthquake was recorded 4 km (3 mi) southwest of White Center, WA, at 1:01 am PDT on 27 October 2022 (08:01 UTC), 25 km deep.

USGS: 4 km SW of White Center, Washington

15 km (9 mi) SSW of Seattle, WA · in Burien, WA

1:01 am PDT, Oct 27, 2022 · · 25 km deep · released about 12 lb of TNT

10 km30 km60 km120 km N Kitsap County 25 kmKing County 43 kmPierce County 52 kmMason County 60 kmThurston County 70 kmIsland County 77 kmSnohomish County 79 kmJefferson County 91 kmLewis County 101 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
1:01 am PDT on 27 October 2022 ()
Where
4 km (3 mi) southwest of White Center, WA · earthquakes near White Center
Magnitude
M 1.7 (ml)
Depth
25 km below the surface
Felt
no reports yet
Nearest
Kitsap County, 25 km NW
Nearest mapped fault
Seattle fault, 5 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 1478 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 White Center, 4 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: Burien, Vashon, Boulevard Park, Normandy Park, Riverton, Southworth.

How big was it?

This earthquake released about 12 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.7 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,300,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 900,000× the energy of this one
  3. Around the size people start to feel M 3.0 80× the energy of this one
  4. This earthquake M 1.7 about 12 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

No earthquake of M4 or more has been recorded within 50 km since our catalogue begins in 2016.

Before 2016, the USGS record lists 6 earthquakes of M5 or more within 50 km; the five largest:

  1. 6.8 The 2001 Nisqually, Washington Earthquake · 45 km SSW of this epicentre
  2. 6.7 1 km ENE of Dash Point, Washington · 18 km S of this epicentre
  3. 6.1 Puget Sound region, Washington · 28 km WSW of this epicentre
  4. 5.8 Puget Sound area, Washington · 44 km WSW of this epicentre
  5. 5.4 8 km NNE of Lake Marcel-Stillwater, Washington · 49 km NE 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 47.4912, -122.4000. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Kitsap County, WA 25 km (16 mi) NW earthquakes near Kitsap County
King County, WA 43 km (26 mi) E earthquakes near King County
Pierce County, WA 52 km (33 mi) SSE earthquakes near Pierce County
Mason County, WA 60 km (37 mi) WSW earthquakes near Mason County
Thurston County, WA 70 km (43 mi) SSW earthquakes near Thurston County
Island County, WA 77 km (48 mi) NNW earthquakes near Island County

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

Aftershocks so far

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

  1. 1.6 3 km W of Belfair, Washington
  2. 1.6 0 km N of Lake Marcel-Stillwater, Washington
  3. 1.6 3 km SSE of Quilcene, Washington
  4. 2.0 3 km N of White Center, Washington
  5. 1.6 3 km NW of Wauna, Washington
  6. 2.3 3 km W of Hobart, Washington
  7. 2.3 6 km WSW of Shoreline, Washington
  8. 1.6 4 km W of Bainbridge Island, Washington
  9. 1.6 2 km NE of Esperance, Washington
  10. 1.7 Puget Sound region, 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. 1.9 2 km SSW of Esperance, Washington
  15. 1.8 1 km W of Suquamish, 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.