QuakeIndex

explosion · reviewed by a seismologist

M 1.6ml

16 km ESE of Yacolt, Washington

· -1.0 km deep · released about 8.4 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Clark County 21 kmSkamania County 32 kmMultnomah County 32 kmHood River County 54 kmCowlitz County 57 kmColumbia County 69 kmClackamas County 71 kmWashington County 74 kmLewis County 88 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 1.6 (ml)
Depth
-1.0 km below the surface
Felt
no reports yet
Nearest
Clark County, 21 km W
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 565 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 8.4 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.6 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,800,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,300,000× the energy of this one
  3. Around the size people start to feel M 3.0 110× the energy of this one
  4. This earthquake M 1.6 about 8.4 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 45.8007, -122.2160. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Clark County, WA 21 km (13 mi) E of here earthquakes near Clark County
Skamania County, WA 32 km (20 mi) SW of here earthquakes near Skamania County
Multnomah County, OR 32 km (20 mi) NNE of here earthquakes near Multnomah County
Hood River County, OR 54 km (34 mi) NW of here earthquakes near Hood River County
Cowlitz County, WA 57 km (35 mi) SE of here earthquakes near Cowlitz County
Columbia County, OR 69 km (43 mi) ESE of here earthquakes near Columbia 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 2 km ESE of Lewisville, Washington
  2. 2.0 37 km NNE of Amboy, Washington
  3. 1.6 37 km NNE of Amboy, Washington
  4. 1.5 28 km N of Amboy, Washington
  5. 1.5 4 km NNW of North Bonneville, Washington
  6. 1.7 16 km NNE of Amboy, Washington
  7. 1.5 2 km SSE of Lewisville, Washington
  8. 1.7 26 km N of Amboy, Washington
  9. 2.0 1 km NNW of Salmon Creek, Washington
  10. 2.4 8 km NW of Parkdale, Oregon
  11. 1.6 Washington-Oregon border region
  12. 1.7 3 km SSW of Yacolt, Washington
  13. 1.8 4 km SW of North Portland, Oregon
  14. 1.5 5 km ENE of Lewisville, Washington
  15. 1.6 5 km E of Lewisville, 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.