Earthquake · reviewed by a seismologist
M 2.4ml
Earthquake near Chickasha, OK
USGS: 6 km SE of Chickasha, Oklahoma
60 km (37 mi) SSW of Oklahoma City, OK · 50 km (31 mi) SW of Moore, OK
- When
- 1:47 pm CDT on 7 October 2026 ()
- Where
- 7 km (4 mi) SE of Chickasha, OK · earthquakes near Chickasha
- Magnitude
- M 2.4 (ml)
- Depth
- 10 km below the surface
- Felt
- 5 reports · strongest reported intensity III
- Nearest
- Grady County, 1 km W
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 48 minutes ago
A magnitude 2.4 earthquake was recorded 7 km (4 mi) SE of Chickasha, OK, at 1:47 pm CDT on 7 October 2026 (18:47 UTC). 5 people have reported feeling it to USGS. 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 39 km (24 mi) from the epicentre. In Chickasha, 7 km away, the estimate is intensity III (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: Ninnekah, Blanchard, Rush Springs.
How big was it?
This earthquake released about 110 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.4 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 130,000× the energy of this one
- Magna, Utah 2020 M 5.7 95,000× the energy of this one
- Around the size people start to feel M 3.0 8.5× the energy of this one
- This earthquake M 2.4 about 110 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 35.0195, -97.8772. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Grady County, OK | 1 km (1 mi) | W | earthquakes near Grady County |
| McClain County, OK | 39 km (24 mi) | E | earthquakes near McClain County |
| Caddo County, OK | 49 km (30 mi) | WNW | earthquakes near Caddo County |
| Cleveland County, OK | 55 km (34 mi) | ENE | earthquakes near Cleveland County |
| Canadian County, OK | 59 km (37 mi) | N | earthquakes near Canadian County |
| Stephens County, OK | 60 km (37 mi) | S | earthquakes near Stephens County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
No further earthquakes have been recorded within 50 km since this one.
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.
Revisions
USGS refines a solution as more stations report. Every change we have seen is listed here.
| What changed | From | To | When |
|---|---|---|---|
| reported intensity | 2.7 | 3.4 | |
| felt reports | 4 | 5 | |
| review status | automatic | reviewed | |
| location | 7 km ESE of Chickasha, Oklahoma | 6 km SE of Chickasha, Oklahoma | |
| longitude | -97.86 | -97.88 | |
| latitude | 35.02 | 35.02 | |
| depth | 1.56 | 10.13 | |
| magnitude | 2.74 | 2.38 | |
| felt reports | 2 | 4 | |
| reported intensity | 2.2 | 2.7 | |
| felt reports | 1 | 2 | |
| reported intensity | not reported | 2.2 |
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.