QuakeIndex

explosion · reviewed by a seismologist

M 1.5ml

4 km NNW of Summitview, Washington

· -0.9 km deep · released about 5.6 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Yakima County 21 kmKittitas County 55 kmKlickitat County 85 kmBenton County 99 kmGrant County 111 kmSkamania County 120 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 1.5 (ml)
Depth
-0.9 km below the surface
Felt
no reports yet
Nearest
Yakima County, 21 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 543 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 5.6 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 2,700,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,900,000× the energy of this one
  3. Around the size people start to feel M 3.0 170× the energy of this one
  4. This earthquake M 1.5 about 5.6 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 46.6335, -120.6635. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Yakima County, WA 21 km (13 mi) NNE of here earthquakes near Yakima County
Kittitas County, WA 55 km (34 mi) S of here earthquakes near Kittitas County
Klickitat County, WA 85 km (53 mi) N of here earthquakes near Klickitat County
Benton County, WA 99 km (61 mi) WNW of here earthquakes near Benton County
Grant County, WA 111 km (69 mi) SW of here earthquakes near Grant County
Skamania County, WA 120 km (75 mi) NE of here earthquakes near Skamania County

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

Aftershocks so far

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

  1. 1.6 11 km N of Selah, Washington
  2. 1.5 11 km N of Selah, Washington
  3. 1.6 17 km SSW of Nile, Washington
  4. 1.5 17 km SSE of White Swan, Washington
  5. 3.1 5 km WSW of Harrah, Washington
  6. 2.3 17 km SW of Nile, Washington
  7. 1.8 9 km SSW of Ellensburg, Washington
  8. 2.6 17 km SW of Nile, Washington
  9. 1.5 18 km SW of Nile, Washington
  10. 1.7 3 km ESE of Kittitas, Washington
  11. 1.6 2 km WNW of Summitview, Washington
  12. 2.1 11 km NNE of Selah, Washington
  13. 1.6 17 km SW of Nile, Washington
  14. 2.0 17 km WSW of Nile, Washington
  15. 1.7 20 km S of White Swan, 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.