QuakeIndex

explosion · reviewed by a seismologist

M 1.9ml

7 km SE of Jeffers Garden, Oregon

· -0.3 km deep · released about 18 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Clatsop County 11 kmWahkiakum County 37 kmPacific County 51 kmColumbia County 59 kmTillamook County 71 kmWashington County 82 kmCowlitz County 88 kmYamhill County 102 kmClark County 108 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
-0.3 km below the surface
Felt
no reports yet
Nearest
Clatsop County, 11 km SE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2068 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 18 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 5.8 840,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 600,000× the energy of this one
  3. Around the size people start to feel M 3.0 53× the energy of this one
  4. This earthquake M 1.9 about 18 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 46.0960, -123.8060. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Clatsop County, OR 11 km (7 mi) NW of here earthquakes near Clatsop County
Wahkiakum County, WA 37 km (23 mi) SW of here earthquakes near Wahkiakum County
Pacific County, WA 51 km (32 mi) S of here earthquakes near Pacific County
Columbia County, OR 59 km (36 mi) WNW of here earthquakes near Columbia County
Tillamook County, OR 71 km (44 mi) N of here earthquakes near Tillamook County
Washington County, OR 82 km (51 mi) NW of here earthquakes near Washington County

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

Aftershocks so far

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

  1. 1.6 9 km E of Wheeler, Oregon
  2. 1.6 3 km E of East Cathlamet, Washington
  3. 1.6 13 km E of Wheeler, Oregon
  4. 1.9 12 km SW of Lebam, Washington
  5. 1.9 5 km NW of Westport, Oregon
  6. 1.6 3 km ENE of East Cathlamet, Washington
  7. 1.5 8 km NNE of Nehalem, Oregon
  8. 1.9 4 km SW of Cathlamet, Washington
  9. 1.9 3 km WSW of Cathlamet, Washington
  10. 1.7 19 km WSW of Westport, Oregon
  11. 1.6 4 km SW of Cathlamet, Washington
  12. 1.6 5 km W of Clatskanie, Oregon
  13. 2.0 4 km WSW of Wheeler, Oregon
  14. 2.0 4 km SW of Cathlamet, Washington
  15. 1.7 3 km SW of Cathlamet, 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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