Earthquake · reviewed by a seismologist
M 2.3md
Earthquake near Ridgely, TN
No earthquake was likely felt in Ridgely in the 24 hours to 7:36 am CST (13:36 UTC). The last one was M 1.6, 3 km (2 mi) NNE, at 9:02 pm CDT on 31 October 2026, estimated intensity II (weak) in town. Every earthquake near Ridgely
This page: a magnitude 2.3 earthquake was recorded 3 km (2 mi) west of Ridgely, TN, at 1:50 pm CDT on 20 October 2020 (18:50 UTC), 8.8 km deep.
USGS: 3 km W of Ridgely, Tennessee
- When
- 1:50 pm CDT on 20 October 2020 ()
- Where
- 3 km (2 mi) west of Ridgely, TN · earthquakes near Ridgely
- Magnitude
- M 2.3 (md)
- Depth
- 8.8 km below the surface
- Felt
- no reports yet
- Nearest
- Lake County, 8 km NNE
- Nearest mapped fault
- Reelfoot scarp and New Madrid seismic zone, under 1 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 2212 days ago
Earthquake alerts for Ridgely, TN
Get a notification in this browser when USGS records an earthquake near Ridgely, TN. 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 37 km (23 mi) from the epicentre. In Ridgely, 3 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: Tiptonville 13 km, intensity II · Caruthersville 14 km, intensity II · Portageville 24 km, intensity II · Dyersburg 29 km, intensity II · Steele 34 km, intensity II · New Madrid 35 km, intensity II. Estimated for each town centre; each link is that town's own record.
How big was it?
This earthquake released about 94 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.3 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 160,000× the energy of this one
- Magna, Utah 2020 M 5.7 110,000× the energy of this one
- Around the size people start to feel M 3.0 10× the energy of this one
- This earthquake M 2.3 about 94 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 36.2675, -89.5233. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Lake County, TN | 8 km (5 mi) | NNE | earthquakes near Lake County |
| Pemiscot County, MO | 24 km (15 mi) | WSW | earthquakes near Pemiscot County |
| Dyer County, TN | 26 km (16 mi) | SSE | earthquakes near Dyer County |
| Obion County, TN | 35 km (22 mi) | ENE | earthquakes near Obion County |
| New Madrid County, MO | 38 km (24 mi) | NNW | earthquakes near New Madrid County |
| Fulton County, KY | 44 km (27 mi) | NE | earthquakes near Fulton County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
58 earthquakes have been recorded within 50 km since this one.
- 2.4 4 km NW of Marston, Missouri
- 1.8 3 km WNW of Marston, Missouri
- 2.0 4 km NW of Marston, Missouri
- 1.5 3 km WNW of Marston, Missouri
- 1.7 3 km WNW of Marston, Missouri
- 2.0 3 km NW of Marston, Missouri
- 2.0 4 km S of New Madrid, Missouri
- 1.6 1 km WNW of Cooter, Missouri
- 1.8 8 km N of New Madrid, Missouri
- 1.7 5 km ESE of Marston, Missouri
- 1.6 5 km ESE of Marston, Missouri
- 1.6 1 km NNW of Marston, Missouri
- 1.7 4 km NNW of Tiptonville, Tennessee
- 1.6 7 km NW of Ridgely, Tennessee
- 2.0 7 km NW of Ridgely, Tennessee
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.