quarry blast · reviewed by a seismologist
M 1.8ml
Earthquake near Atoka, OK
No earthquake was likely felt in Atoka in the 24 hours to 11:13 pm CST (05:13 UTC). The last one was M 3.4, 221 km (137 mi) NW, at 5:53 am CST on 7 November 2026, estimated intensity II (weak) in town; 23 felt reports to USGS. Every earthquake near Atoka
No: USGS classifies this as a quarry blast, not an earthquake. A magnitude 1.8 quarry blast was recorded 15 km (9 mi) north-northeast of Atoka, OK, at 12:28 pm CDT on 1 September 2023 (17:28 UTC), less than 1 km deep.
USGS: 3 km NNE of Stringtown, Oklahoma
- When
- 12:28 pm CDT on 1 September 2023 ()
- Where
- 15 km (9 mi) north-northeast of Atoka, OK · earthquakes near Atoka
- Oklahoma today
- every earthquake in Oklahoma in the last 24 hours
- Magnitude
- M 1.8 (ml)
- Depth
- 0.0 km below the surface
- Felt
- no reports yet
- Nearest
- Atoka County, 12 km S
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 1168 days ago
Earthquake alerts for Atoka, OK
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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 16 km (10 mi) from the epicentre. In Atoka, 15 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: Coalgate.
USGS catalogues this as quarry blast, not an earthquake.
How big was it?
This earthquake released about 14 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.8 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 1,100,000× the energy of this one
- Magna, Utah 2020 M 5.7 790,000× the energy of this one
- Around the size people start to feel M 3.0 70× the energy of this one
- This earthquake M 1.8 about 14 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 34.4973, -96.0380. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Atoka County, OK | 12 km (7 mi) | S | earthquakes near Atoka County |
| Coal County, OK | 25 km (15 mi) | WNW | earthquakes near Coal County |
| Pittsburg County, OK | 54 km (34 mi) | NNE | earthquakes near Pittsburg County |
| Pushmataha County, OK | 59 km (37 mi) | ESE | earthquakes near Pushmataha County |
| Johnston County, OK | 60 km (37 mi) | WSW | earthquakes near Johnston County |
| Bryan County, OK | 63 km (39 mi) | SSW | earthquakes near Bryan 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.
- 1.9 4 km ENE of Wardville, Oklahoma
- 1.7 5 km NE of Wardville, Oklahoma
- 1.7 3 km NE of Wardville, Oklahoma
- 1.7 4 km ENE of Wardville, Oklahoma
- 2.4 4 km ENE of Wardville, Oklahoma
- 1.5 4 km NE of Wardville, Oklahoma
- 2.5 4 km ENE of Wardville, Oklahoma
- 2.9 4 km ENE of Wardville, Oklahoma
- 2.0 5 km ENE of Wardville, Oklahoma
- 2.1 5 km ENE of Wardville, Oklahoma
- 2.7 4 km ENE of Wardville, Oklahoma
- 1.8 4 km NE of Wardville, Oklahoma
- 1.5 4 km ENE of Wardville, Oklahoma
- 1.6 2 km SE of Stonewall, Oklahoma
- 1.5 9 km SSE of Wapanucka, Oklahoma
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.