QuakeIndex

Earthquake · reviewed by a seismologist

M 1.6ml

8 km E of Kalama, Washington

· 18 km deep · released about 6.4 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Cowlitz County 22 kmColumbia County 27 kmClark County 33 kmMultnomah County 57 kmWashington County 57 kmSkamania County 61 kmWahkiakum County 62 kmLewis County 70 kmClatsop County 74 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
18 km below the surface
Felt
no reports yet
Nearest
Cowlitz County, 22 km NNE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2480 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 6.4 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 2,400,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,700,000× the energy of this one
  3. Around the size people start to feel M 3.0 150× the energy of this one
  4. This earthquake M 1.6 about 6.4 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 46.0057, -122.7408. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Cowlitz County, WA 22 km (14 mi) SSW of here earthquakes near Cowlitz County
Columbia County, OR 27 km (17 mi) ENE of here earthquakes near Columbia County
Clark County, WA 33 km (20 mi) NW of here earthquakes near Clark County
Multnomah County, OR 57 km (35 mi) NNW of here earthquakes near Multnomah County
Washington County, OR 57 km (36 mi) NNE of here earthquakes near Washington County
Skamania County, WA 61 km (38 mi) W of here earthquakes near Skamania County

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

Aftershocks so far

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

  1. 1.6 10 km SSE of Toledo, Washington
  2. 1.6 21 km E of Castle Rock, Washington
  3. 1.7 21 km E of Castle Rock, Washington
  4. 2.1 29 km E of Castle Rock, Washington
  5. 1.6 21 km E of Castle Rock, Washington
  6. 1.8 2 km S of Saint Helens, Oregon
  7. 1.9 10 km SSE of Toledo, Washington
  8. 1.6 5 km E of Lewisville, Washington
  9. 1.7 20 km SE of Toledo, Washington
  10. 1.7 1 km SSE of Prescott, Oregon
  11. 1.6 7 km ENE of Prescott, Oregon
  12. 1.6 12 km NW of West Longview, Washington
  13. 2.3 14 km ENE of Yacolt, Washington
  14. 1.5 3 km E of Lewisville, Washington
  15. 1.7 3 km NW of West Longview, 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.