QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8ml

1 km W of Redmond, Washington

· 0.5 km deep · released about 14 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N King County 31 kmKitsap County 38 kmSnohomish County 51 kmIsland County 67 kmPierce County 69 kmMason County 85 kmSkagit County 95 kmThurston County 97 kmJefferson County 105 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 1.8 (ml)
Depth
0.5 km below the surface
Felt
no reports yet
Nearest
King County, 31 km SE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1592 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 14 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,100,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 790,000× the energy of this one
  3. Around the size people start to feel M 3.0 70× the energy of this one
  4. This earthquake M 1.8 about 14 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 47.6715, -122.1430. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
King County, WA 31 km (19 mi) NW of here earthquakes near King County
Kitsap County, WA 38 km (24 mi) E of here earthquakes near Kitsap County
Snohomish County, WA 51 km (32 mi) SSW of here earthquakes near Snohomish County
Island County, WA 67 km (42 mi) SE of here earthquakes near Island County
Pierce County, WA 69 km (43 mi) N of here earthquakes near Pierce County
Mason County, WA 85 km (53 mi) ENE of here earthquakes near Mason 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. 1.5 12 km ESE of Riverbend, Washington
  2. 1.7 2 km ESE of Enetai, Washington
  3. 1.7 1 km ENE of Granite Falls, Washington
  4. 1.6 2 km NNE of Woods Creek, Washington
  5. 1.5 Washington
  6. 1.9 1 km NNW of Des Moines, Washington
  7. 2.0 Puget Sound region, Washington
  8. 2.4 0 km NW of Des Moines, Washington
  9. 1.7 2 km SSW of Burien, Washington
  10. 1.6 4 km ENE of Lake Marcel-Stillwater, Washington
  11. 1.5 3 km WSW of North Bend, Washington
  12. 1.5 3 km ENE of Lake Marcel-Stillwater, Washington
  13. 1.6 0 km SW of Esperance, Washington
  14. 1.5 Puget Sound region, Washington
  15. 1.7 Puget Sound region, 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 16,000 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.