QuakeIndex

Earthquake · reviewed by a seismologist

M 4.1ml

38 km NE of Amanda Park, Washington

· 39 km deep · released about 20 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Jefferson County 11 kmMason County 49 kmClallam County 51 kmKitsap County 68 kmGrays Harbor County 70 kmIsland County 82 kmSan Juan County 95 kmThurston County 102 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 4.1 (ml)
Depth
39 km below the surface
Felt
107 reports · strongest reported intensity IV
Measured shaking
intensity III (ShakeMap)
USGS impact alert
green
Nearest
Jefferson County, 11 km N
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 554 days ago

This was a light earthquake. It is usually felt clearly nearby and can rattle windows and dishes, but damage is uncommon. 107 people have reported feeling it to USGS.

How big was it?

This earthquake released about 20 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 5.1 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 8,500× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 380× the energy of this one
  3. Magna, Utah 2020 M 5.7 270× the energy of this one
  4. This earthquake M 4.1 about 20 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 42× more

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 47.7113, -123.5542. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Jefferson County, WA 11 km (7 mi) S of here earthquakes near Jefferson County
Mason County, WA 49 km (31 mi) NW of here earthquakes near Mason County
Clallam County, WA 51 km (32 mi) SSE of here earthquakes near Clallam County
Kitsap County, WA 68 km (42 mi) W of here earthquakes near Kitsap County
Grays Harbor County, WA 70 km (43 mi) NNE of here earthquakes near Grays Harbor County
Island County, WA 82 km (51 mi) SW of here earthquakes near Island County

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

Aftershocks so far

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

  1. 2.1 14 km N of Hoodsport, Washington
  2. 2.0 Washington-British Columbia border region
  3. 2.5 11 km SW of Brinnon, Washington
  4. 1.7 5 km WSW of Neilton, Washington
  5. 1.6 17 km N of Amanda Park, Washington
  6. 2.6 11 km WNW of Hoodsport, Washington
  7. 2.4 11 km NE of Hoodsport, Washington
  8. 1.9 14 km NNW of Amanda Park, Washington
  9. 1.7 25 km ESE of Forks, Washington
  10. 1.7 26 km ESE of Forks, Washington
  11. 1.6 13 km N of Amanda Park, Washington
  12. 1.6 Olympic Peninsula, Washington
  13. 1.6 28 km SSW of Port Angeles, Washington
  14. 1.7 27 km NW of Hoodsport, Washington
  15. 1.5 3 km W 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 1 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.