QuakeIndex

explosion · reviewed by a seismologist

M 1.5ml

3 km NW of Mount Hood Village, Oregon

· -1.6 km deep · released about 5.6 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Clackamas County 29 kmHood River County 31 kmMultnomah County 37 kmClark County 57 kmMarion County 70 kmWasco County 70 kmSkamania County 71 kmWashington County 87 kmYamhill County 103 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 1.5 (ml)
Depth
-1.6 km below the surface
Felt
no reports yet
Nearest
Clackamas County, 29 km SSW
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.

USGS catalogues this as explosion, not an earthquake.

How big was it?

This earthquake released about 5.6 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 2,700,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,900,000× the energy of this one
  3. Around the size people start to feel M 3.0 170× the energy of this one
  4. This earthquake M 1.5 about 5.6 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 45.3848, -122.0095. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Clackamas County, OR 29 km (18 mi) NNE of here earthquakes near Clackamas County
Hood River County, OR 31 km (19 mi) WSW of here earthquakes near Hood River County
Multnomah County, OR 37 km (23 mi) ESE of here earthquakes near Multnomah County
Clark County, WA 57 km (35 mi) SE of here earthquakes near Clark County
Marion County, OR 70 km (43 mi) NE of here earthquakes near Marion County
Wasco County, OR 70 km (44 mi) WNW of here earthquakes near Wasco County

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

Aftershocks so far

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

  1. 1.6 7 km ESE of Molalla, Oregon
  2. 1.7 4 km NNW of Mount Hood Village, Oregon
  3. 1.6 6 km SE of Odell, Oregon
  4. 1.5 4 km WNW of Camas, Washington
  5. 2.1 10 km NNE of Sandy, Oregon
  6. 1.6 10 km NNW of Carson, Washington
  7. 1.6 6 km ESE of Molalla, Oregon
  8. 1.8 6 km ESE of Molalla, Oregon
  9. 1.9 8 km NNE of Government Camp, Oregon
  10. 1.5 5 km E of Beavercreek, Oregon
  11. 2.1 7 km ESE of Molalla, Oregon
  12. 1.6 5 km S of Odell, Oregon
  13. 1.5 27 km NNE of Gates, Oregon
  14. 1.9 8 km NNE of Government Camp, Oregon
  15. 1.8 10 km ESE of Molalla, Oregon

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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