QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8ml

2 km WSW of Shoreline, Washington

· 26 km deep · released about 14 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Kitsap County 24 kmKing County 50 kmIsland County 51 kmSnohomish County 57 kmMason County 74 kmPierce County 79 kmJefferson County 86 kmSkagit County 93 kmThurston County 97 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
26 km below the surface
Felt
no reports yet
Nearest
Kitsap County, 24 km WSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2178 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 5.7 760,000× the energy of this one
  3. Around the size people start to feel M 3.0 68× 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 47.7480, -122.3772. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Kitsap County, WA 24 km (15 mi) ENE of here earthquakes near Kitsap County
King County, WA 50 km (31 mi) NW of here earthquakes near King County
Island County, WA 51 km (31 mi) SSE of here earthquakes near Island County
Snohomish County, WA 57 km (35 mi) SW of here earthquakes near Snohomish County
Mason County, WA 74 km (46 mi) NE of here earthquakes near Mason County
Pierce County, WA 79 km (49 mi) NNW of here earthquakes near Pierce County

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

Aftershocks so far

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

  1. 1.7 4 km SSW of Bethel, Washington
  2. 2.0 2 km N of Lakeland South, Washington
  3. 1.7 5 km SSW of Port Ludlow, Washington
  4. 1.9 5 km NNW of North Sultan, Washington
  5. 1.7 5 km ENE of Lake Roesiger, Washington
  6. 1.7 2 km SW of Carnation, Washington
  7. 2.0 0 km N of Enetai, Washington
  8. 1.8 1 km SW of Enetai, Washington
  9. 1.6 2 km S of Bainbridge Island, Washington
  10. 2.4 0 km SE of Enetai, Washington
  11. 1.6 6 km SW of Port Hadlock-Irondale, Washington
  12. 1.7 1 km S of Southworth, Washington
  13. 1.5 5 km NNW of North Sultan, Washington
  14. 1.6 3 km N of Silverdale, Washington
  15. 1.9 4 km WSW of Lake Marcel-Stillwater, 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.