QuakeIndex

Earthquake · reviewed by a seismologist

M 1.6ml

Earthquake near Darrington, WA

No earthquake was likely felt in Darrington in the 24 hours to 2:09 am PST (10:09 UTC). The last one was M 3.8, 74 km (46 mi) W, at 11:35 pm PDT on 1 July 2026, estimated intensity II (weak) in town; 2,030 felt reports to USGS. Every earthquake near Darrington

This page: a magnitude 1.6 earthquake was recorded 6 km (4 mi) west-southwest of Darrington, WA, at 10:33 pm PDT on 18 June 2023 (05:33 UTC), 8.8 km deep.

USGS: 6 km WSW of Darrington, Washington

84 km (52 mi) NE of Seattle, WA · 39 km (24 mi) ENE of Marysville, WA

10:33 pm PDT, Jun 18, 2023 · · 8.8 km deep · released about 7.6 lb of TNT

10 km30 km60 km120 km N Snohomish County 20 kmSkagit County 32 kmWhatcom County 70 kmIsland County 74 kmKing County 83 kmChelan County 88 kmKitsap County 98 kmSan Juan County 110 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
10:33 pm PDT on 18 June 2023 ()
Where
6 km (4 mi) west-southwest of Darrington, WA · earthquakes near Darrington
Magnitude
M 1.6 (ml)
Depth
8.8 km below the surface
Felt
no reports yet
Nearest
Snohomish County, 20 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1243 days ago

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

At this magnitude and depth, people at rest would likely notice it out to about 7 km (4 mi) from the epicentre. In Darrington, 6 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.

Likely felt in: Darrington 6 km, intensity II. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 7.6 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.6 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 2,000,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,400,000× the energy of this one
  3. Around the size people start to feel M 3.0 130× the energy of this one
  4. This earthquake M 1.6 about 7.6 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 4.6 on 2019-07-12 — about 30,000 times the energy of this one.

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

  1. 5.6 Near Marblemount, Washington · 37 km NNE of this epicentre
  2. 5.0 4 km ENE of Machias, Washington · 35 km SW 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 48.2257, -121.6732. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Snohomish County, WA 20 km (13 mi) SSW earthquakes near Snohomish County
Skagit County, WA 32 km (20 mi) NNW earthquakes near Skagit County
Whatcom County, WA 70 km (43 mi) N earthquakes near Whatcom County
Island County, WA 74 km (46 mi) W earthquakes near Island County
King County, WA 83 km (51 mi) S earthquakes near King County
Chelan County, WA 88 km (55 mi) ESE earthquakes near Chelan County

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

Aftershocks so far

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

  1. 1.6 2 km E of Granite Falls, Washington
  2. 1.6 4 km WSW of Darrington, Washington
  3. 1.7 2 km ENE of Granite Falls, Washington
  4. 2.7 8 km NNW of Swede Heaven, Washington
  5. 1.5 2 km SSW of Monroe, Washington
  6. 2.3 1 km SW of West Lake Stevens, Washington
  7. 1.6 2 km NE of Granite Falls, Washington
  8. 1.8 7 km ENE of Lake Roesiger, Washington
  9. 1.7 2 km N of Bryant, Washington
  10. 1.9 3 km ESE of Lake Roesiger, Washington
  11. 2.2 3 km SW of Roosevelt, Washington
  12. 1.7 2 km E of Granite Falls, Washington
  13. 2.0 10 km NNE of Hamilton, Washington
  14. 1.5 2 km W of Woods Creek, Washington
  15. 1.5 1 km ESE of Three Lakes, 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.