Earthquake · reviewed by a seismologist
M 2.8md
Earthquake near Pocahontas, AR
No earthquake was likely felt in Pocahontas in the 24 hours to 5:43 pm CST (23:43 UTC). The last one was M 4.0, 105 km (65 mi) ESE, at 12:59 pm CDT on 23 April 2026, estimated intensity III (weak) in town; 913 felt reports to USGS. Every earthquake near Pocahontas
This page: a magnitude 2.8 earthquake was recorded 18 km (11 mi) north-northeast of Pocahontas, AR, at 3:35 am CDT on 27 September 2022 (08:35 UTC), 11 km deep. 6 people have reported feeling it to USGS.
USGS: 0.4 km ESE of Maynard, Arkansas
- When
- 3:35 am CDT on 27 September 2022 ()
- Where
- 18 km (11 mi) north-northeast of Pocahontas, AR · earthquakes near Pocahontas
- Magnitude
- M 2.8 (md)
- Depth
- 11 km below the surface
- Felt
- 6 reports · strongest reported intensity III
- Nearest
- Randolph County, 15 km WSW
- Nearest mapped fault
- Western Lowlands liquefaction features, 9 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 1439 days ago
Earthquake alerts for Pocahontas, AR
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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 small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.
At this magnitude and depth, people at rest would likely notice it out to about 61 km (38 mi) from the epicentre. In Pocahontas, 18 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.
Likely felt in: Pocahontas 18 km, intensity III · Doniphan 25 km, intensity III. Estimated for each town centre; each link is that town's own record.
How big was it?
This earthquake released about 490 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.8 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 31,000× the energy of this one
- Magna, Utah 2020 M 5.7 22,000× the energy of this one
- Around the size people start to feel M 3.0 1.9× the energy of this one
- This earthquake M 2.8 about 490 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 36.4028, -90.8837. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Randolph County, AR | 15 km (9 mi) | WSW | earthquakes near Randolph County |
| Ripley County, MO | 28 km (17 mi) | N | earthquakes near Ripley County |
| Clay County, AR | 42 km (26 mi) | E | earthquakes near Clay County |
| Greene County, AR | 42 km (26 mi) | SE | earthquakes near Greene County |
| Lawrence County, AR | 45 km (28 mi) | SSW | earthquakes near Lawrence County |
| Butler County, MO | 55 km (34 mi) | NE | earthquakes near Butler County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
24 earthquakes have been recorded within 50 km since this one.
- 1.8 9 km W of Maynard, Arkansas
- 2.2 4 km SSE of Maynard, Arkansas
- 2.1 6 km ENE of Smithville, Arkansas
- 2.9 12 km WSW of Grandin, Missouri
- 2.2 13 km W of Maynard, Arkansas
- 2.5 4 km E of Doniphan, Missouri
- 2.7 5 km E of Doniphan, Missouri
- 2.3 5 km SE of Imboden, Arkansas
- 2.0 6 km N of Black Rock, Arkansas
- 2.1 8 km NE of Smithville, Arkansas
- 2.0 4 km NNW of Minturn, Arkansas
- 1.8 2 km SW of Ravenden, Arkansas
- 2.0 5 km N of Black Rock, Arkansas
- 1.7 3 km N of Black Rock, Arkansas
- 2.4 7 km SW of Ravenden, Arkansas
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.