explosion · reviewed by a seismologist
M 1.7ml
Earthquake near Warm Springs, OR
No earthquake was likely felt in Warm Springs in the 24 hours to 3:39 pm PST (23:39 UTC). The last one was M 7.0, 577 km (358 mi) SSW, at 10:44 am PST on 5 December 2024, estimated intensity II (weak) in town; 16,883 felt reports to USGS. Every earthquake near Warm Springs
No: USGS classifies this as a explosion, not an earthquake. A magnitude 1.7 explosion was recorded 36 km (22 mi) north of Warm Springs, OR, at 1:57 pm PDT on 30 April 2021 (20:57 UTC), less than 1 km deep.
USGS: 5 km ESE of Pine Grove, Oregon
- When
- 1:57 pm PDT on 30 April 2021 ()
- Where
- 36 km (22 mi) north of Warm Springs, OR · earthquakes near Warm Springs
- Magnitude
- M 1.7 (ml)
- Depth
- -1.3 km below the surface
- Felt
- no reports yet
- Nearest
- Wasco County, 14 km NE
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 613 days ago
Earthquake alerts for Warm Springs, OR
Get a notification in this browser when USGS records an earthquake near Warm Springs, OR. No account or email needed.
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 12 km (7 mi) from the epicentre. In Warm Springs, 36 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.
USGS catalogues this as explosion, not an earthquake.
How big was it?
This earthquake released about 9.3 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.7 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 1,600,000× the energy of this one
- Magna, Utah 2020 M 5.7 1,100,000× the energy of this one
- Around the size people start to feel M 3.0 100× the energy of this one
- This earthquake M 1.7 about 9.3 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 45.0848, -121.3078. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Wasco County, OR | 14 km (9 mi) | NE | earthquakes near Wasco County |
| Jefferson County, OR | 50 km (31 mi) | SSE | earthquakes near Jefferson County |
| Hood River County, OR | 55 km (34 mi) | NNW | earthquakes near Hood River County |
| Sherman County, OR | 60 km (38 mi) | NE | earthquakes near Sherman County |
| Clackamas County, OR | 70 km (44 mi) | W | earthquakes near Clackamas County |
| Gilliam County, OR | 87 km (54 mi) | ENE | earthquakes near Gilliam County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
57 earthquakes have been recorded within 50 km since this one.
- 0.8 6 km ENE of Government Camp, Oregon
- 0.9 8 km NNE of Government Camp, Oregon
- 1.1 6 km ENE of Government Camp, Oregon
- 0.8 9 km NNE of Government Camp, Oregon
- 0.4 6 km NE of Government Camp, Oregon
- 1.4 9 km NNE of Government Camp, Oregon
- 0.0 7 km ENE of Government Camp, Oregon
- 1.9 8 km NNE of Government Camp, Oregon
- 1.9 8 km NNE of Government Camp, Oregon
- 1.6 5 km ENE of Government Camp, Oregon
- 1.8 3 km NW of Madras, Oregon
- 1.6 7 km ENE of Government Camp, Oregon
- 1.6 2 km E of Government Camp, Oregon
- 1.8 2 km E of Government Camp, Oregon
- 1.6 1 km E of Government Camp, Oregon
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.