QuakeIndex

Earthquake · reviewed by a seismologist

M 1.7ml

5 km N of Belfair, Washington

· 20 km deep · released about 11 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Kitsap County 20 kmMason County 31 kmThurston County 62 kmJefferson County 63 kmPierce County 71 kmKing County 74 kmIsland County 74 kmGrays Harbor County 87 kmSnohomish County 100 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 1.7 (ml)
Depth
20 km below the surface
Felt
1 report · strongest reported intensity II
Nearest
Kitsap County, 20 km NE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2631 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 11 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.7 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,400,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,000,000× the energy of this one
  3. Around the size people start to feel M 3.0 89× the energy of this one
  4. This earthquake M 1.7 about 11 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 47.4977, -122.8228. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Kitsap County, WA 20 km (13 mi) SW of here earthquakes near Kitsap County
Mason County, WA 31 km (19 mi) ENE of here earthquakes near Mason County
Thurston County, WA 62 km (39 mi) N of here earthquakes near Thurston County
Jefferson County, WA 63 km (39 mi) ESE of here earthquakes near Jefferson County
Pierce County, WA 71 km (44 mi) NW of here earthquakes near Pierce County
King County, WA 74 km (46 mi) W of here earthquakes near King 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. 1.5 6 km NW of Gorst, Washington
  2. 1.8 4 km SSW of Erlands Point-Kitsap Lake, Washington
  3. 1.9 1 km SSE of Parkwood, Washington
  4. 2.4 5 km E of Quilcene, Washington
  5. 2.3 4 km NNW of Lakeland North, Washington
  6. 1.7 3 km WNW of Wauna, Washington
  7. 1.7 2 km NNW of Indianola, Washington
  8. 1.8 2 km S of Keyport, Washington
  9. 2.1 1 km SW of Home, Washington
  10. 2.4 1 km SSW of Home, Washington
  11. 1.6 2 km WSW of Home, Washington
  12. 2.7 3 km S of Home, Washington
  13. 1.7 0 km ESE of Enetai, Washington
  14. 2.5 3 km SW of Woodway, Washington
  15. 2.2 5 km SE of Shelton, 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 4.1 on 2017-02-23 — it released about 3,800 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.