QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8ml

2 km WNW of Indianola, Washington

· 24 km deep · released about 14 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Kitsap County 14 kmIsland County 46 kmKing County 61 kmMason County 64 kmSnohomish County 68 kmJefferson County 73 kmPierce County 83 kmThurston County 93 kmSan Juan County 94 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
24 km below the surface
Felt
no reports yet
Nearest
Kitsap County, 14 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2152 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 47.7508, -122.5530. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Kitsap County, WA 14 km (9 mi) NNE of here earthquakes near Kitsap County
Island County, WA 46 km (29 mi) S of here earthquakes near Island County
King County, WA 61 km (38 mi) WNW of here earthquakes near King County
Mason County, WA 64 km (40 mi) NE of here earthquakes near Mason County
Snohomish County, WA 68 km (42 mi) WSW of here earthquakes near Snohomish 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

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

  1. 1.8 3 km WNW of Navy Yard City, Washington
  2. 1.6 4 km WNW of Freeland, Washington
  3. 1.5 6 km NNW of Lofall, Washington
  4. 1.6 0 km WSW of Parkwood, Washington
  5. 1.7 5 km NE of Kingston, Washington
  6. 2.5 1 km NE of Enetai, Washington
  7. 1.5 1 km E of Dash Point, Washington
  8. 2.1 4 km NNW of Kingston, Washington
  9. 1.6 6 km NNE of Lofall, Washington
  10. 1.6 2 km WNW of Bethel, Washington
  11. 2.5 1 km E of Bethel, Washington
  12. 1.7 Puget Sound region, Washington
  13. 1.9 1 km NW of West Lake Sammamish, Washington
  14. 2.5 1 km E of Poulsbo, Washington
  15. 1.7 4 km SSE of Bainbridge Island, 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.