QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8ml

Puget Sound region, Washington

· 27 km deep · released about 14 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Kitsap County 22 kmIsland County 38 kmSnohomish County 64 kmKing County 66 kmMason County 70 kmJefferson County 73 kmSan Juan County 86 kmPierce County 91 kmSkagit County 92 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
27 km below the surface
Felt
1 report · strongest reported intensity II
Nearest
Kitsap County, 22 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2085 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 1 person has reported feeling it to USGS.

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 47.8275, -122.5548. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Kitsap County, WA 22 km (14 mi) NNE of here earthquakes near Kitsap County
Island County, WA 38 km (23 mi) SSE of here earthquakes near Island County
Snohomish County, WA 64 km (40 mi) WSW of here earthquakes near Snohomish County
King County, WA 66 km (41 mi) NW of here earthquakes near King County
Mason County, WA 70 km (44 mi) NE of here earthquakes near Mason County
Jefferson County, WA 73 km (45 mi) E of here earthquakes near Jefferson County

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

Aftershocks so far

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

  1. 1.8 5 km SSW of Port Ludlow, Washington
  2. 1.7 1 km ESE of Enetai, Washington
  3. 1.7 12 km ENE of Jamestown, Washington
  4. 1.5 1 km ENE of Bainbridge Island, Washington
  5. 2.3 0 km E of Enetai, Washington
  6. 1.9 2 km NNE of Esperance, Washington
  7. 2.3 0 km SSW of Boulevard Park, Washington
  8. 1.7 1 km SW of East Port Orchard, Washington
  9. 1.5 1 km N of Boulevard Park, Washington
  10. 1.7 7 km WNW of Burley, Washington
  11. 1.7 1 km NNE of Tracyton, Washington
  12. 2.3 7 km SSE of Coupeville, Washington
  13. 1.7 6 km NNW of Lofall, Washington
  14. 1.6 0 km N of Boulevard Park, Washington
  15. 2.8 0 km S of Boulevard Park, 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.