QuakeIndex

Earthquake · reviewed by a seismologist

M 1.6ml

10 km WNW of Belfair, Washington

· 12 km deep · released about 8.7 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Mason County 23 kmKitsap County 28 kmJefferson County 55 kmThurston County 63 kmIsland County 77 kmPierce County 78 kmGrays Harbor County 79 kmKing County 84 kmClallam 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 1.6 (ml)
Depth
12 km below the surface
Felt
1 report · strongest reported intensity II
Nearest
Mason County, 23 km SW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 585 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 8.7 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.6 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,700,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,200,000× the energy of this one
  3. Around the size people start to feel M 3.0 110× the energy of this one
  4. This earthquake M 1.6 about 8.7 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 47.4950, -122.9497. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Mason County, WA 23 km (14 mi) NE of here earthquakes near Mason County
Kitsap County, WA 28 km (17 mi) SW of here earthquakes near Kitsap County
Jefferson County, WA 55 km (34 mi) SE of here earthquakes near Jefferson County
Thurston County, WA 63 km (39 mi) N of here earthquakes near Thurston County
Island County, WA 77 km (48 mi) SSW of here earthquakes near Island County
Pierce County, WA 78 km (48 mi) NW of here earthquakes near Pierce County

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

Aftershocks so far

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

  1. 1.6 7 km ESE of Quilcene, Washington
  2. 1.9 4 km WNW of Gorst, Washington
  3. 1.6 10 km S of Shelton, Washington
  4. 1.9 2 km E of Belfair, Washington
  5. 1.7 8 km SSW of Seabeck, Washington
  6. 1.6 10 km SSE of Shelton, Washington
  7. 1.8 3 km WNW of Gorst, Washington
  8. 2.7 1 km ENE of Enetai, Washington
  9. 1.9 1 km E of Enetai, Washington
  10. 1.6 4 km SW of Port Ludlow, Washington
  11. 2.6 1 km ENE of Enetai, Washington
  12. 2.4 1 km ENE of Enetai, Washington
  13. 1.9 1 km E of Enetai, Washington
  14. 3.0 0 km E of Enetai, Washington
  15. 1.8 29 km WNW of Hoodsport, 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 4,700 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.