QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8ml

11 km ENE of Copalis Beach, Washington

· 32 km deep · released about 17 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Grays Harbor County 15 kmPacific County 67 kmMason County 69 kmJefferson County 83 kmThurston County 93 kmWahkiakum County 104 kmClallam County 109 kmKitsap County 118 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
32 km below the surface
Felt
no reports yet
Nearest
Grays Harbor County, 15 km E
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 540 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 17 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 5.8 900,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 640,000× the energy of this one
  3. Around the size people start to feel M 3.0 57× the energy of this one
  4. This earthquake M 1.8 about 17 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 47.1385, -124.0267. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Grays Harbor County, WA 15 km (10 mi) W of here earthquakes near Grays Harbor County
Pacific County, WA 67 km (42 mi) NNW of here earthquakes near Pacific County
Mason County, WA 69 km (43 mi) WSW of here earthquakes near Mason County
Jefferson County, WA 83 km (52 mi) SSW of here earthquakes near Jefferson County
Thurston County, WA 93 km (58 mi) WNW of here earthquakes near Thurston County
Wahkiakum County, WA 104 km (65 mi) NNW of here earthquakes near Wahkiakum County

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

Aftershocks so far

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

  1. 1.8 2 km WSW of Ocean City, Washington
  2. 1.7 14 km S of Cosmopolis, Washington
  3. 1.5 6 km E of Queets, Washington
  4. 1.5 10 km NNE of Tokeland, Washington
  5. 1.7 12 km NNW of Humptulips, Washington
  6. 2.2 12 km ENE of Humptulips, Washington
  7. 1.6 5 km WNW of Humptulips, Washington
  8. 1.5 2 km ESE of Humptulips, Washington
  9. 1.6 9 km NE of Humptulips, Washington
  10. 1.7 12 km NE of Santiago, Washington
  11. 1.6 19 km E of Humptulips, Washington
  12. 2.0 9 km NE of Santiago, Washington
  13. 1.9 12 km SSE of Cosmopolis, Washington
  14. 1.5 12 km NNW of Amanda Park, Washington
  15. 1.6 0 km S of Pacific Beach, 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

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.