QuakeIndex

Earthquake · reviewed by a seismologist

M 3.4ml

21 km WNW of Vernonia, Oregon

· 24 km deep · released about 1.8 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Clatsop County 22 kmColumbia County 30 kmWahkiakum County 42 kmWashington County 49 kmTillamook County 56 kmCowlitz County 68 kmYamhill County 75 kmPacific County 75 kmClark County 77 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 3.4 (ml)
Depth
24 km below the surface
Felt
77 reports · strongest reported intensity IV
Measured shaking
intensity III (ShakeMap)
Nearest
Clatsop County, 22 km WNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3182 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 77 people have reported feeling it to USGS.

How big was it?

This earthquake released about 1.8 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.4 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 95,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 4,300× the energy of this one
  3. Magna, Utah 2020 M 5.7 3,000× the energy of this one
  4. This earthquake M 3.4 about 1.8 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 3.7× more

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 45.9167, -123.4612. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Clatsop County, OR 22 km (14 mi) ESE of here earthquakes near Clatsop County
Columbia County, OR 30 km (18 mi) W of here earthquakes near Columbia County
Wahkiakum County, WA 42 km (26 mi) S of here earthquakes near Wahkiakum County
Washington County, OR 49 km (31 mi) NW of here earthquakes near Washington County
Tillamook County, OR 56 km (35 mi) NNE of here earthquakes near Tillamook County
Cowlitz County, WA 68 km (42 mi) WSW of here earthquakes near Cowlitz County

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

Aftershocks so far

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

  1. 2.3 0 km S of Banks, Oregon
  2. 1.9 12 km WNW of Scappoose, Oregon
  3. 1.5 10 km W of Vernonia, Oregon
  4. 1.7 12 km NNE of Vernonia, Oregon
  5. 1.5 10 km NNE of Vernonia, Oregon
  6. 1.8 4 km NNW of Skamokawa Valley, Washington
  7. 1.9 19 km WSW of Vernonia, Oregon
  8. 1.5 8 km NE of Nehalem, Oregon
  9. 1.9 4 km SW of Cathlamet, Washington
  10. 1.6 9 km NE of Vernonia, Oregon
  11. 1.8 2 km N of West Longview, Washington
  12. 1.7 12 km NE of Vernonia, Oregon
  13. 1.5 13 km ENE of Vernonia, Oregon
  14. 1.9 3 km NNW of West Longview, Washington
  15. 1.6 4 km NW of West Longview, 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.