QuakeIndex

Earthquake · reviewed by a seismologist

M 1.7ml

11 km SSW of Morton, Washington

· 12 km deep · released about 9 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Lewis County 15 kmCowlitz County 40 kmSkamania County 56 kmThurston County 66 kmPierce County 67 kmClark County 77 kmColumbia County 82 kmWahkiakum County 87 kmMultnomah County 101 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
12 km below the surface
Felt
no reports yet
Nearest
Lewis County, 15 km NNW
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.

How big was it?

This earthquake released about 9 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 1,700,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,200,000× 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 1.7 about 9 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 46.4557, -122.3185. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Lewis County, WA 15 km (9 mi) SSE of here earthquakes near Lewis County
Cowlitz County, WA 40 km (25 mi) NE of here earthquakes near Cowlitz County
Skamania County, WA 56 km (35 mi) NNW of here earthquakes near Skamania County
Thurston County, WA 66 km (41 mi) SE of here earthquakes near Thurston County
Pierce County, WA 67 km (42 mi) S of here earthquakes near Pierce County
Clark County, WA 77 km (48 mi) N of here earthquakes near Clark County

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

Aftershocks so far

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

  1. 1.8 10 km WSW of Alder, Washington
  2. 1.6 19 km SSW of Mossyrock, Washington
  3. 1.7 36 km SSE of Morton, Washington
  4. 2.1 38 km NNE of Amboy, Washington
  5. 1.8 5 km ENE of Ashford, Washington
  6. 2.7 5 km ENE of Ashford, Washington
  7. 2.1 5 km ENE of Ashford, Washington
  8. 1.6 31 km NNE of Amboy, Washington
  9. 1.5 7 km ESE of Mossyrock, Washington
  10. 2.2 36 km SSE of Morton, Washington
  11. 1.7 17 km S of Morton, Washington
  12. 1.5 10 km SSE of Toledo, Washington
  13. 1.8 10 km SSE of Mossyrock, Washington
  14. 2.5 15 km SSE of Ashford, Washington
  15. 1.7 10 km NE of Castle Rock, 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.