QuakeIndex

explosion · reviewed by a seismologist

M 1.9ml

Earthquake near The Dalles, OR

No earthquake was likely felt in The Dalles in the 24 hours to 6:14 am PST (14:14 UTC). The last one was M 1.7, 6 km (4 mi) NNE, at 5:50 pm PDT on 3 June 2026, estimated intensity II (weak) in town. Every earthquake near The Dalles

No: USGS classifies this as a explosion, not an earthquake. A magnitude 1.9 explosion was recorded 32 km (20 mi) east of The Dalles, OR, at 9:10 am PDT on 19 May 2021 (16:10 UTC), less than 1 km deep.

USGS: Washington-Oregon border region

9:10 am PDT, May 19, 2021 · · -0.8 km deep · released about 25 lb of TNT

10 km30 km60 km120 km N Klickitat County 25 kmSherman County 28 kmGilliam County 48 kmWasco County 62 kmHood River County 70 kmYakima County 90 kmMorrow County 94 kmSkamania County 101 kmJefferson County 116 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
9:10 am PDT on 19 May 2021 ()
Where
32 km (20 mi) east of The Dalles, OR · earthquakes near The Dalles
Magnitude
M 1.9 (ml)
Depth
-0.8 km below the surface
Felt
no reports yet
Nearest
Klickitat County, 25 km N
Nearest mapped fault
Oak Flat fault, 22 km from its surface trace — near is not the same as on
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2002 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

At this magnitude and depth, people at rest would likely notice it out to about 15 km (9 mi) from the epicentre. In The Dalles, 32 km away, the estimate is intensity II (weak). Estimated from magnitude, depth and distance with the intensity equation USGS Did You Feel It? uses; felt reports, where there are any, are the measurement.

Earthquakes near other towns within 30 km: Goldendale.

USGS catalogues this as explosion, not an earthquake.

How big was it?

This earthquake released about 25 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.0 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 600,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 420,000× the energy of this one
  3. Around the size people start to feel M 3.0 38× the energy of this one
  4. This earthquake M 1.9 about 25 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 45.6452, -120.7735. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Klickitat County, WA 25 km (16 mi) N earthquakes near Klickitat County
Sherman County, OR 28 km (18 mi) SSE earthquakes near Sherman County
Gilliam County, OR 48 km (30 mi) SE earthquakes near Gilliam County
Wasco County, OR 62 km (38 mi) SSW earthquakes near Wasco County
Hood River County, OR 70 km (44 mi) WSW earthquakes near Hood River County
Yakima County, WA 90 km (56 mi) N earthquakes near Yakima County

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

Aftershocks so far

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

  1. 2.1 12 km SSE of Bickleton, Washington
  2. 1.9 7 km SW of Arlington, Oregon
  3. 1.7 3 km NE of Dallesport, Washington
  4. 1.8 4 km E of Dallesport, Washington
  5. 1.7 1 km SSE of Goldendale, Washington
  6. 1.9 1 km NNE of Dallesport, Washington
  7. 1.7 8 km SE of Wasco, Oregon
  8. 1.7 1 km ESE of Chenoweth, Oregon
  9. 2.0 3 km ESE of Goldendale, Washington
  10. 1.8 6 km SW of Arlington, Oregon
  11. 2.2 19 km S of Arlington, Oregon
  12. 1.6 4 km ENE of Dallesport, Washington
  13. 1.5 5 km ESE of Dufur, Oregon
  14. 1.9 11 km S of Bickleton, Washington
  15. 1.9 13 km E of Goldendale, 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

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