QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8ml

28 km ENE of Amanda Park, Washington

· 41 km deep · released about 15 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Jefferson County 30 kmMason County 34 kmGrays Harbor County 51 kmKitsap County 68 kmClallam County 69 kmThurston County 85 kmIsland County 95 kmPacific County 110 kmSan Juan County 113 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 1.8 (ml)
Depth
41 km below the surface
Felt
no reports yet
Nearest
Jefferson County, 30 km N
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3388 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 15 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,000,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 710,000× the energy of this one
  3. Around the size people start to feel M 3.0 63× the energy of this one
  4. This earthquake M 1.8 about 15 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 47.5330, -123.5380. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Jefferson County, WA 30 km (19 mi) S of here earthquakes near Jefferson County
Mason County, WA 34 km (21 mi) NW of here earthquakes near Mason County
Grays Harbor County, WA 51 km (32 mi) NNE of here earthquakes near Grays Harbor County
Kitsap County, WA 68 km (42 mi) W of here earthquakes near Kitsap County
Clallam County, WA 69 km (43 mi) SSE of here earthquakes near Clallam County
Thurston County, WA 85 km (53 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

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

  1. 2.1 32 km S of Port Angeles East, Washington
  2. 1.7 21 km N of Amanda Park, Washington
  3. 2.6 18 km WSW of Quilcene, Washington
  4. 1.9 6 km WNW of Hoodsport, Washington
  5. 3.2 3 km W of Skokomish, Washington
  6. 3.8 3 km WSW of Skokomish, Washington
  7. 1.7 26 km NW of Hoodsport, Washington
  8. 1.6 10 km SW of Brinnon, Washington
  9. 1.5 5 km WSW of Shelton, Washington
  10. 1.9 8 km N of Hoodsport, Washington
  11. 2.0 10 km N of Amanda Park, Washington
  12. 3.4 21 km ENE of Amanda Park, Washington
  13. 1.9 20 km SE of Neilton, Washington
  14. 2.2 13 km NW of Hoodsport, Washington
  15. 2.2 20 km NW of Amanda Park, 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 2,700 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.