QuakeIndex

Earthquake · reviewed by a seismologist

M 1.6ml

1 km WNW of Cherry Grove, Washington

· 15 km deep · released about 7.6 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Clark County 10 kmMultnomah County 32 kmColumbia County 40 kmCowlitz County 44 kmWashington County 48 kmSkamania County 56 kmClackamas County 78 kmHood River County 80 kmYamhill County 83 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
15 km below the surface
Felt
no reports yet
Nearest
Clark County, 10 km ESE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3306 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

How big was it?

This earthquake released about 7.6 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 2,000,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,400,000× the energy of this one
  3. Around the size people start to feel M 3.0 130× the energy of this one
  4. This earthquake M 1.6 about 7.6 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 45.8037, -122.6003. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Clark County, WA 10 km (6 mi) WNW of here earthquakes near Clark County
Multnomah County, OR 32 km (20 mi) NNW of here earthquakes near Multnomah County
Columbia County, OR 40 km (25 mi) ESE of here earthquakes near Columbia County
Cowlitz County, WA 44 km (27 mi) S of here earthquakes near Cowlitz County
Washington County, OR 48 km (30 mi) NE of here earthquakes near Washington County
Skamania County, WA 56 km (35 mi) WSW of here earthquakes near Skamania County

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

Aftershocks so far

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

  1. 1.7 23 km NNE of Amboy, Washington
  2. 1.6 1 km NNW of Walnut Grove, Washington
  3. 1.5 14 km ESE of Yacolt, Washington
  4. 1.6 16 km ESE of Yacolt, Washington
  5. 1.8 18 km ESE of Castle Rock, Washington
  6. 1.7 5 km WNW of Deer Island, Oregon
  7. 1.8 3 km NNW of Mill Plain, Washington
  8. 1.6 0 km WSW of Aloha, Oregon
  9. 1.7 4 km WSW of Yacolt, Washington
  10. 1.6 1 km N of West Haven, Oregon
  11. 1.5 11 km NNE of Sandy, Oregon
  12. 1.6 1 km WSW of West Slope, Oregon
  13. 2.0 4 km E of West Side Highway, Washington
  14. 1.6 1 km NNE of Saint Helens, Oregon
  15. 1.6 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.