QuakeIndex

Earthquake · reviewed by a seismologist

M 1.5ml

Earthquake near Yakima, WA

No earthquake was likely felt in Yakima in the 24 hours to 4:30 am PST (12:30 UTC). The last one was M 3.1, 25 km (15 mi) SSW, at 9:23 am PDT on 11 August 2026, estimated intensity II (weak) in town; 57 felt reports to USGS. Every earthquake near Yakima

This page: a magnitude 1.5 earthquake was recorded 42 km (26 mi) south-southwest of Yakima, WA, at 4:38 am PDT on 20 August 2026 (11:38 UTC), 5.8 km deep.

USGS: 17 km SSE of White Swan, Washington

40 km (25 mi) SSW of Yakima, WA

4:38 am PDT, Aug 20, 2026 · · 5.8 km deep · released about 5.9 lb of TNT

10 km30 km60 km120 km N Yakima County 25 kmKlickitat County 42 kmBenton County 88 kmSherman County 93 kmKittitas County 99 kmGilliam County 100 kmSkamania County 102 kmHood River County 111 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
4:38 am PDT on 20 August 2026 ()
Where
42 km (26 mi) south-southwest of Yakima, WA · earthquakes near Yakima
Magnitude
M 1.5 (ml)
Depth
5.8 km below the surface
Felt
no reports yet
Nearest
Yakima County, 25 km NNW
Nearest mapped fault
Toppenish Ridge structures, 4 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 85 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 9 km (6 mi) from the epicentre. In Yakima, 42 km away, the estimate is intensity I (not felt). 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: Wapato.

How big was it?

This earthquake released about 5.9 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 2,500,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,800,000× the energy of this one
  3. Around the size people start to feel M 3.0 160× the energy of this one
  4. This earthquake M 1.5 about 5.9 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.

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 since 1900 lists no earthquake of M5 or more within 50 km.

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 46.2370, -120.6643. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Yakima County, WA 25 km (16 mi) NNW earthquakes near Yakima County
Klickitat County, WA 42 km (26 mi) SSW earthquakes near Klickitat County
Benton County, WA 88 km (55 mi) E earthquakes near Benton County
Sherman County, OR 93 km (58 mi) S earthquakes near Sherman County
Kittitas County, WA 99 km (61 mi) N earthquakes near Kittitas County
Gilliam County, OR 100 km (62 mi) SSE earthquakes near Gilliam County

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

Aftershocks so far

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

  1. 0.6 4 km SSW of Ahtanum, Washington
  2. 1.0 2 km NE of Yakima, Washington
  3. 0.7 7 km W of Ahtanum, Washington
  4. 0.9 22 km SSE of Harrah, Washington
  5. 2.1 12 km SSE of Bickleton, 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.