explosion · reviewed by a seismologist
M 1.9ml
Earthquake near Ellensburg, WA
No earthquake was likely felt in Ellensburg in the 24 hours to 7:46 pm PST (03:46 UTC). The last one was M 1.8, 10 km (6 mi) SSW, at 11:34 am PDT on 10 July 2026, estimated intensity II (weak) in town. Every earthquake near Ellensburg
No: USGS classifies this as a explosion, not an earthquake. A magnitude 1.9 explosion was recorded 24 km (15 mi) northwest of Ellensburg, WA, at 1:03 pm PDT on 13 August 2024 (20:03 UTC), less than 1 km deep.
USGS: 11 km WNW of Thorp, Washington
- When
- 1:03 pm PDT on 13 August 2024 ()
- Where
- 24 km (15 mi) northwest of Ellensburg, WA · earthquakes near Ellensburg
- Magnitude
- M 1.9 (ml)
- Depth
- -0.9 km below the surface
- Felt
- no reports yet
- Nearest
- Kittitas County, 10 km E
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 728 days ago
Earthquake alerts for Ellensburg, WA
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Alerts are on for .
Not a warning. An alert comes after USGS publishes a quake, usually minutes after the shaking. For early warning use ShakeAlert, through your phone's Wireless Emergency Alerts or the MyShake app.
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 Ellensburg, 24 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: Cle Elum.
USGS catalogues this as explosion, not an earthquake.
How big was it?
This earthquake released about 21 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.
- Mineral, Virginia 2011 M 5.8 730,000× the energy of this one
- Magna, Utah 2020 M 5.7 520,000× the energy of this one
- Around the size people start to feel M 3.0 46× the energy of this one
- This earthquake M 1.9 about 21 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 47.1212, -120.8078. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Kittitas County, WA | 10 km (6 mi) | E | earthquakes near Kittitas County |
| Yakima County, WA | 74 km (46 mi) | S | earthquakes near Yakima County |
| Chelan County, WA | 83 km (52 mi) | N | earthquakes near Chelan County |
| King County, WA | 88 km (54 mi) | WNW | earthquakes near King County |
| Grant County, WA | 102 km (63 mi) | E | earthquakes near Grant County |
| Pierce County, WA | 102 km (63 mi) | W | earthquakes near Pierce 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.
- 1.6 19 km S of Kittitas, Washington
- 1.1 6 km ESE of Kittitas, Washington
- 1.2 12 km NNE of Naches, Washington
- 1.2 4 km WNW of Tieton, Washington
- 1.6 11 km N of Selah, Washington
- 1.5 11 km N of Selah, Washington
- 1.6 12 km NW of Thorp, Washington
- 2.3 17 km SW of Nile, Washington
- 1.8 9 km SSW of Ellensburg, Washington
- 2.8 1 km SSE of Easton, Washington
- 1.7 3 km ESE of Kittitas, Washington
- 2.8 13 km NW of Cliffdell, Washington
- 2.1 11 km NNE of Selah, Washington
- 2.0 17 km WSW of Nile, Washington
- 1.8 15 km SW of Thorp, 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
- The official USGS event page — the source of record for every value above
- Did you feel it? Report it to USGS — reports go to USGS, not to us
- ShakeMap for this event, when USGS has produced one
QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.