QuakeIndex

Earthquake · reviewed by a seismologist

M 1.7ml

26 km N of Amboy, Washington

· 15 km deep · released about 9.6 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Cowlitz County 18 kmSkamania County 41 kmClark County 42 kmLewis County 48 kmColumbia County 53 kmMultnomah County 67 kmWahkiakum County 76 kmWashington County 83 kmThurston County 92 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
15 km below the surface
Felt
no reports yet
Nearest
Cowlitz County, 18 km WNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1791 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 9.6 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 99× the energy of this one
  4. This earthquake M 1.7 about 9.6 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 46.1502, -122.4593. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Cowlitz County, WA 18 km (11 mi) ESE of here earthquakes near Cowlitz County
Skamania County, WA 41 km (26 mi) WNW of here earthquakes near Skamania County
Clark County, WA 42 km (26 mi) N of here earthquakes near Clark County
Lewis County, WA 48 km (30 mi) S of here earthquakes near Lewis County
Columbia County, OR 53 km (33 mi) ENE of here earthquakes near Columbia County
Multnomah County, OR 67 km (42 mi) N of here earthquakes near Multnomah County

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

Aftershocks so far

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

  1. 1.7 4 km WSW of Yacolt, Washington
  2. 2.4 Washington
  3. 1.8 11 km SSE of Toledo, Washington
  4. 1.5 26 km S of Morton, Washington
  5. 2.4 30 km ENE of Amboy, Washington
  6. 2.4 29 km ENE of Amboy, Washington
  7. 1.6 31 km NNE of Amboy, Washington
  8. 1.8 7 km WSW of Morton, Washington
  9. 2.7 7 km WSW of Morton, Washington
  10. 1.5 6 km ENE of Prescott, Oregon
  11. 1.7 7 km ENE of Prescott, Oregon
  12. 1.6 10 km SSE of Mossyrock, Washington
  13. 1.6 3 km E of Battle Ground, Washington
  14. 1.7 3 km NNE of La Center, Washington
  15. 1.7 23 km S of Morton, 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.