QuakeIndex

Earthquake · reviewed by a seismologist

M 2.8ml

25 km WNW of Hoodsport, Washington

· 40 km deep · released about 550 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Mason County 27 kmJefferson County 33 kmGrays Harbor County 54 kmKitsap County 61 kmClallam County 74 kmThurston County 79 kmIsland County 92 kmPacific County 110 kmPierce County 110 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 2.8 (ml)
Depth
40 km below the surface
Felt
27 reports · strongest reported intensity III
Measured shaking
intensity II (ShakeMap)
Nearest
Mason County, 27 km SE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 381 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 27 people have reported feeling it to USGS.

How big was it?

This earthquake released about 550 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 28,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 19,000× the energy of this one
  3. Around the size people start to feel M 3.0 1.7× the energy of this one
  4. This earthquake M 2.8 about 550 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 47.5175, -123.4398. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Mason County, WA 27 km (17 mi) NW of here earthquakes near Mason County
Jefferson County, WA 33 km (20 mi) SSE of here earthquakes near Jefferson County
Grays Harbor County, WA 54 km (33 mi) NNE of here earthquakes near Grays Harbor County
Kitsap County, WA 61 km (38 mi) WSW of here earthquakes near Kitsap County
Clallam County, WA 74 km (46 mi) SSE of here earthquakes near Clallam County
Thurston County, WA 79 km (49 mi) NW of here earthquakes near Thurston County

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

Aftershocks so far

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

  1. 0.4 11 km NE of Hoodsport, Washington
  2. 1.8 34 km NE of Amanda Park, Washington
  3. 1.7 35 km NE of Amanda Park, Washington
  4. 1.7 10 km NE of Hoodsport, Washington
  5. 1.9 10 km NE of Hoodsport, Washington
  6. 1.5 9 km NE of Hoodsport, Washington
  7. 1.5 9 km NE of Hoodsport, Washington
  8. 1.8 21 km S of Port Angeles East, Washington
  9. 2.4 40 km NE of Amanda Park, Washington
  10. 1.6 4 km SSW of Shelton, Washington
  11. 2.0 35 km NE of Amanda Park, Washington
  12. 1.5 11 km N of Hoodsport, Washington
  13. 1.7 8 km SSW of Shelton, Washington
  14. 1.7 11 km NW of Belfair, Washington
  15. 2.2 12 km ENE of Humptulips, 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 75 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.