QuakeIndex

Earthquake · reviewed by a seismologist

M 1.6ml

3 km S of Grapeview, Washington

· 25 km deep · released about 7.6 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Mason County 26 kmKitsap County 40 kmThurston County 41 kmPierce County 58 kmJefferson County 77 kmKing County 78 kmGrays Harbor County 78 kmLewis County 87 kmIsland County 96 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
25 km below the surface
Felt
no reports yet
Nearest
Mason County, 26 km WNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 97 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 7.6 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 2,000,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,400,000× the energy of this one
  3. Around the size people start to feel M 3.0 130× the energy of this one
  4. This earthquake M 1.6 about 7.6 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 47.3022, -122.8315. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Mason County, WA 26 km (16 mi) ESE of here earthquakes near Mason County
Kitsap County, WA 40 km (25 mi) SSW of here earthquakes near Kitsap County
Thurston County, WA 41 km (25 mi) N of here earthquakes near Thurston County
Pierce County, WA 58 km (36 mi) WNW of here earthquakes near Pierce County
Jefferson County, WA 77 km (48 mi) SE of here earthquakes near Jefferson County
King County, WA 78 km (48 mi) WSW of here earthquakes near King County

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

Aftershocks so far

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

  1. 1.1 3 km NNW of Dash Point, Washington
  2. 1.0 6 km SE of McCleary, Washington
  3. 0.4 11 km NE of Hoodsport, Washington
  4. 0.7 9 km SSE of Shelton, Washington
  5. 1.7 2 km NNW of Enetai, Washington
  6. 1.5 5 km WSW of Mercer Island, Washington
  7. 2.2 2 km WSW of Wauna, Washington
  8. 1.5 5 km ENE of Belfair, Washington
  9. 1.7 10 km NE of Hoodsport, Washington
  10. 1.9 10 km NE of Hoodsport, Washington
  11. 1.5 9 km NE of Hoodsport, Washington
  12. 1.5 9 km NE of Hoodsport, Washington
  13. 1.9 5 km WNW of White Center, Washington
  14. 1.6 5 km W of Tumwater, Washington
  15. 1.7 1 km ESE of Tacoma, 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 5,400 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.