QuakeIndex

explosion · reviewed by a seismologist

M 1.7ml

3 km NNE of Deer Island, Oregon

· -0.2 km deep · released about 9.3 lb of TNT

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10 km30 km60 km120 km N Columbia County 20 kmCowlitz County 28 kmClark County 33 kmWashington County 50 kmMultnomah County 56 kmWahkiakum County 60 kmSkamania County 67 kmClatsop County 69 kmLewis 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 1.7 (ml)
Depth
-0.2 km below the surface
Felt
no reports yet
Nearest
Columbia County, 20 km W
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1846 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 9.3 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.7 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,600,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,100,000× the energy of this one
  3. Around the size people start to feel M 3.0 100× the energy of this one
  4. This earthquake M 1.7 about 9.3 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 45.9605, -122.8202. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Columbia County, OR 20 km (13 mi) E of here earthquakes near Columbia County
Cowlitz County, WA 28 km (18 mi) SSW of here earthquakes near Cowlitz County
Clark County, WA 33 km (21 mi) NW of here earthquakes near Clark County
Washington County, OR 50 km (31 mi) NNE of here earthquakes near Washington County
Multnomah County, OR 56 km (35 mi) NW of here earthquakes near Multnomah County
Wahkiakum County, WA 60 km (37 mi) SE of here earthquakes near Wahkiakum 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. 1.5 10 km W of Vernonia, Oregon
  2. 1.7 12 km NNE of Vernonia, Oregon
  3. 1.6 3 km WSW of Yacolt, Washington
  4. 1.6 3 km SW of Yacolt, Washington
  5. 1.5 10 km NNE of Vernonia, Oregon
  6. 1.5 11 km SSE of Toledo, Washington
  7. 1.7 3 km E of Prescott, Oregon
  8. 1.6 3 km WSW of Yacolt, Washington
  9. 1.5 9 km SSE of Toledo, Washington
  10. 1.8 8 km S of Scappoose, Oregon
  11. 1.8 3 km WNW of Saint Helens, Oregon
  12. 1.8 9 km NE of Castle Rock, Washington
  13. 1.7 4 km WSW of Yacolt, Washington
  14. 1.8 11 km SSE of Toledo, Washington
  15. 1.6 31 km NNE of Amboy, 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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