QuakeIndex

explosion · reviewed by a seismologist

M 1.7ml

2 km E of Tokeland, Washington

· -0.2 km deep · released about 10 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Pacific County 21 kmGrays Harbor County 46 kmWahkiakum County 61 kmClatsop County 78 kmThurston County 89 kmMason County 92 kmColumbia County 108 kmCowlitz 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 1.7 (ml)
Depth
-0.2 km below the surface
Felt
no reports yet
Nearest
Pacific County, 21 km SE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2634 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

USGS catalogues this as explosion, not an earthquake.

How big was it?

This earthquake released about 10 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.7 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,500,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,000,000× the energy of this one
  3. Around the size people start to feel M 3.0 92× the energy of this one
  4. This earthquake M 1.7 about 10 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 46.7087, -123.9467. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Pacific County, WA 21 km (13 mi) NW of here earthquakes near Pacific County
Grays Harbor County, WA 46 km (29 mi) SSW of here earthquakes near Grays Harbor County
Wahkiakum County, WA 61 km (38 mi) NW of here earthquakes near Wahkiakum County
Clatsop County, OR 78 km (49 mi) NNW of here earthquakes near Clatsop County
Thurston County, WA 89 km (55 mi) WSW of here earthquakes near Thurston County
Mason County, WA 92 km (57 mi) SW of here earthquakes near Mason County

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

Aftershocks so far

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

  1. 1.4 20 km SW of Grayland, Washington
  2. 1.8 2 km WSW of Ocean City, Washington
  3. 1.7 14 km S of Cosmopolis, Washington
  4. 1.5 10 km NNE of Tokeland, Washington
  5. 1.8 3 km WSW of South Bend, Washington
  6. 1.8 3 km S of Willapa, Washington
  7. 1.9 12 km SSE of Cosmopolis, Washington
  8. 1.9 8 km NW of Aberdeen Gardens, Washington
  9. 1.9 12 km SW of Lebam, Washington
  10. 1.7 11 km S of Humptulips, Washington
  11. 2.0 9 km SSW of Humptulips, Washington
  12. 1.5 17 km NNW of Pe Ell, Washington
  13. 2.0 14 km SSE of Cosmopolis, Washington
  14. 1.7 12 km SSE of Cosmopolis, Washington
  15. 1.8 5 km WSW of Aberdeen Gardens, 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.

On USGS

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