QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8ml

1 km SSW of Esperance, Washington

· 21 km deep · released about 14 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Kitsap County 26 kmIsland County 48 kmKing County 51 kmSnohomish County 54 kmMason County 77 kmPierce County 82 kmJefferson County 87 kmSkagit County 89 kmSan Juan County 98 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
21 km below the surface
Felt
no reports yet
Nearest
Kitsap County, 26 km SW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3120 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 47.7788, -122.3638. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Kitsap County, WA 26 km (16 mi) NE of here earthquakes near Kitsap County
Island County, WA 48 km (30 mi) SSE of here earthquakes near Island County
King County, WA 51 km (32 mi) NW of here earthquakes near King County
Snohomish County, WA 54 km (34 mi) SW of here earthquakes near Snohomish County
Mason County, WA 77 km (48 mi) NE of here earthquakes near Mason County
Pierce County, WA 82 km (51 mi) N of here earthquakes near Pierce 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. 2.3 5 km ENE of Port Townsend, Washington
  2. 1.5 2 km ESE of Manchester, Washington
  3. 1.9 3 km E of Indianola, Washington
  4. 1.5 7 km ESE of Carnation, Washington
  5. 1.9 6 km SSE of Port Ludlow, Washington
  6. 2.0 2 km ENE of Granite Falls, Washington
  7. 2.0 1 km SE of Keyport, Washington
  8. 1.6 9 km NE of Duvall, Washington
  9. 1.9 1 km WSW of Freeland, Washington
  10. 1.6 1 km ENE of Enetai, Washington
  11. 1.7 2 km NNE of Southworth, Washington
  12. 2.0 2 km NE of Granite Falls, Washington
  13. 1.6 6 km NE of Port Townsend, Washington
  14. 1.7 6 km NE of Port Townsend, Washington
  15. 1.5 1 km SSE of Keyport, 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.