QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8ml

2 km W of Bainbridge Island, Washington

· 30 km deep · released about 16 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Kitsap County 8 kmMason County 56 kmKing County 56 kmIsland County 60 kmPierce County 70 kmJefferson County 76 kmSnohomish County 76 kmThurston County 79 kmSan Juan County 106 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
30 km below the surface
Felt
3 reports
Nearest
Kitsap County, 8 km WNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 282 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 3 people have reported feeling it to USGS.

How big was it?

This earthquake released about 16 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 5.8 970,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 680,000× the energy of this one
  3. Around the size people start to feel M 3.0 61× the energy of this one
  4. This earthquake M 1.8 about 16 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 47.6235, -122.5513. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Kitsap County, WA 8 km (5 mi) ESE of here earthquakes near Kitsap County
Mason County, WA 56 km (35 mi) ENE of here earthquakes near Mason County
King County, WA 56 km (35 mi) WNW of here earthquakes near King County
Island County, WA 60 km (37 mi) S of here earthquakes near Island County
Pierce County, WA 70 km (44 mi) NNW of here earthquakes near Pierce County
Jefferson County, WA 76 km (47 mi) ESE of here earthquakes near Jefferson County

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

Aftershocks so far

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

  1. 1.6 5 km SSE of Quilcene, Washington
  2. 1.5 5 km WSW of Mercer Island, Washington
  3. 2.2 2 km WSW of Wauna, Washington
  4. 1.5 5 km ENE of Belfair, Washington
  5. 1.6 2 km SSW of Lake Forest Park, Washington
  6. 2.3 5 km SE of Kingston, Washington
  7. 1.7 10 km NE of Hoodsport, Washington
  8. 1.9 10 km NE of Hoodsport, Washington
  9. 1.5 9 km NE of Hoodsport, Washington
  10. 1.5 9 km NE of Hoodsport, Washington
  11. 1.9 5 km WNW of White Center, Washington
  12. 1.5 4 km ESE of Cathcart, Washington
  13. 1.6 4 km S of Port Ludlow, Washington
  14. 1.7 1 km ESE of Tacoma, Washington
  15. 1.6 3 km S of Grapeview, 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 14,000 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.