QuakeIndex

Earthquake · reviewed by a seismologist

M 1.9ml

11 km ESE of Markham, Washington

· 31 km deep · released about 19 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Grays Harbor County 30 kmPacific County 33 kmWahkiakum County 70 kmMason County 77 kmThurston County 79 kmClatsop County 92 kmJefferson County 109 kmCowlitz County 116 kmLewis County 117 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 1.9 (ml)
Depth
31 km below the surface
Felt
no reports yet
Nearest
Grays Harbor County, 30 km N
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 568 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 19 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 810,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 580,000× the energy of this one
  3. Around the size people start to feel M 3.0 51× the energy of this one
  4. This earthquake M 1.9 about 19 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 46.8487, -123.8662. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Grays Harbor County, WA 30 km (18 mi) S of here earthquakes near Grays Harbor County
Pacific County, WA 33 km (21 mi) N of here earthquakes near Pacific County
Wahkiakum County, WA 70 km (44 mi) NNW of here earthquakes near Wahkiakum County
Mason County, WA 77 km (48 mi) SW of here earthquakes near Mason County
Thurston County, WA 79 km (49 mi) W of here earthquakes near Thurston County
Clatsop County, OR 92 km (57 mi) N of here earthquakes near Clatsop County

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

Aftershocks so far

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

  1. 1.5 10 km NNE of Tokeland, Washington
  2. 2.2 12 km ENE of Humptulips, Washington
  3. 1.8 3 km WSW of South Bend, Washington
  4. 1.8 3 km S of Willapa, Washington
  5. 1.6 5 km WNW of Humptulips, Washington
  6. 1.5 2 km ESE of Humptulips, Washington
  7. 1.6 19 km E of Humptulips, Washington
  8. 1.9 12 km SSE of Cosmopolis, Washington
  9. 1.6 0 km S of Pacific Beach, Washington
  10. 1.9 8 km NW of Aberdeen Gardens, Washington
  11. 1.9 12 km SW of Lebam, Washington
  12. 1.7 11 km S of Humptulips, Washington
  13. 2.0 9 km SSW of Humptulips, Washington
  14. 1.5 17 km NNW of Pe Ell, Washington
  15. 2.0 14 km SSE of Cosmopolis, 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.