QuakeIndex

explosion · reviewed by a seismologist

M 1.9ml

Earthquake near Dayton, WA

USGS: 11 km SE of Dayton, Washington

5:12 pm PDT, Jun 7, 2021 · · -0.2 km deep · released about 24 lb of TNT

Every earthquake near Dayton Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Columbia County 6 kmGarfield County 33 kmWalla Walla County 46 kmAsotin County 51 kmWhitman County 78 kmFranklin County 85 kmNez Perce County 86 kmWallowa County 90 kmAdams County 98 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
5:12 pm PDT on 7 June 2021 ()
Where
11 km (7 mi) SE of Dayton, WA · earthquakes near Dayton
Magnitude
M 1.9 (ml)
Depth
-0.2 km below the surface
Felt
no reports yet
Nearest
Columbia County, 6 km NNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1943 days ago

A magnitude 1.9 earthquake was recorded 11 km (7 mi) SE of Dayton, WA, at 5:12 pm PDT on 7 June 2021 (00:12 UTC). This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

Earthquakes near other towns within 30 km: Waitsburg.

USGS catalogues this as explosion, not an earthquake.

How big was it?

This earthquake released about 24 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 640,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 450,000× the energy of this one
  3. Around the size people start to feel M 3.0 40× the energy of this one
  4. This earthquake M 1.9 about 24 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.

For this area

No earthquake of M4 or more has been recorded within 50 km since our catalogue begins in 2016.

Before 2016, the USGS record lists one earthquake of M5 or more within 50 km:

  1. 6.0 3 km SW of Garrett, Washington · 49 km WSW of this epicentre

Since 2016: the QuakeIndex catalogue (US, M1.5+), built from the USGS FDSN event service. Before 2016: USGS ComCat, M5+ from 1900. Distances are between epicentres. This is the record, not a forecast.

Where

Epicentre 46.2470, -117.8777. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Columbia County, WA 6 km (4 mi) NNW earthquakes near Columbia County
Garfield County, WA 33 km (21 mi) NE earthquakes near Garfield County
Walla Walla County, WA 46 km (29 mi) W earthquakes near Walla Walla County
Asotin County, WA 51 km (31 mi) E earthquakes near Asotin County
Whitman County, WA 78 km (48 mi) NNE earthquakes near Whitman County
Franklin County, WA 85 km (53 mi) WNW earthquakes near Franklin County

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

Aftershocks so far

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

  1. 1.9 6 km WSW of Dayton, Washington
  2. 1.7 15 km NW of Pomeroy, Washington
  3. 1.6 5 km SW of Dayton, Washington
  4. 1.8 14 km E of Pomeroy, Washington
  5. 1.7 6 km WSW of Dayton, Washington
  6. 1.6 11 km E of Milton-Freewater, Oregon
  7. 1.7 11 km E of Milton-Freewater, Oregon
  8. 2.0 16 km WNW of Pomeroy, Washington
  9. 1.7 6 km WSW of Dayton, Washington
  10. 1.6 7 km SW of Dayton, Washington
  11. 1.6 19 km SE of Walla Walla East, Washington
  12. 1.9 7 km WSW of Dayton, Washington
  13. 1.7 7 km ENE of Waitsburg, Washington
  14. 1.8 7 km ENE of Waitsburg, Washington
  15. 1.9 5 km NE of Dixie, 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.