QuakeIndex

Earthquake · reviewed by a seismologist

M 2.2ml

2 km NW of Markham, Washington

· 35 km deep · released about 69 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Grays Harbor County 26 kmPacific County 45 kmMason County 80 kmWahkiakum County 83 kmThurston County 90 kmClatsop County 103 kmJefferson County 105 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 2.2 (ml)
Depth
35 km below the surface
Felt
1 report · strongest reported intensity II
Nearest
Grays Harbor County, 26 km NE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 520 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 1 person has reported feeling it to USGS.

How big was it?

This earthquake released about 69 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.2 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 220,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 150,000× the energy of this one
  3. Around the size people start to feel M 3.0 14× the energy of this one
  4. This earthquake M 2.2 about 69 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 46.9235, -124.0172. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Grays Harbor County, WA 26 km (16 mi) SW of here earthquakes near Grays Harbor County
Pacific County, WA 45 km (28 mi) NNW of here earthquakes near Pacific County
Mason County, WA 80 km (49 mi) SW of here earthquakes near Mason County
Wahkiakum County, WA 83 km (52 mi) NNW of here earthquakes near Wahkiakum County
Thurston County, WA 90 km (56 mi) W of here earthquakes near Thurston County
Clatsop County, OR 103 km (64 mi) NNW of here earthquakes near Clatsop County

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

Aftershocks so far

28 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. 1.7 12 km NNW of Humptulips, Washington
  6. 2.2 12 km ENE of Humptulips, Washington
  7. 1.8 3 km WSW of South Bend, Washington
  8. 1.8 3 km S of Willapa, Washington
  9. 1.6 5 km WNW of Humptulips, Washington
  10. 1.5 2 km ESE of Humptulips, Washington
  11. 1.6 9 km NE of Humptulips, Washington
  12. 1.6 19 km E of Humptulips, Washington
  13. 2.0 9 km NE of Santiago, Washington
  14. 1.9 12 km SSE of Cosmopolis, 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.