Earthquake · reviewed by a seismologist
M 2.3md
Earthquake near Portsmouth, OH
USGS: 4 km WSW of Stout, Ohio
- When
- 5:26 am EDT on 25 March 2018 ()
- Where
- 38 km (24 mi) WSW of Portsmouth, OH · earthquakes near Portsmouth
- Magnitude
- M 2.3 (md)
- Depth
- 15 km below the surface
- Felt
- 2 reports · strongest reported intensity III
- Nearest
- Lewis County, 13 km SSE
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 3111 days ago
A magnitude 2.3 earthquake was recorded 38 km (24 mi) WSW of Portsmouth, OH, at 5:26 am EDT on 25 March 2018 (09:26 UTC). 2 people have reported feeling it to USGS. This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.
Earthquakes near other towns within 30 km: Vanceburg, West Union, Maysville, Aberdeen.
How big was it?
This earthquake released about 85 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 5.8 180,000× the energy of this one
- Magna, Utah 2020 M 5.7 130,000× the energy of this one
- Around the size people start to feel M 3.0 11× the energy of this one
- This earthquake M 2.3 about 85 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 38.6412, -83.4233. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Lewis County, KY | 13 km (8 mi) | SSE | earthquakes near Lewis County |
| Adams County, OH | 22 km (14 mi) | NNW | earthquakes near Adams County |
| Mason County, KY | 36 km (22 mi) | W | earthquakes near Mason County |
| Fleming County, KY | 39 km (24 mi) | SW | earthquakes near Fleming County |
| Scioto County, OH | 42 km (26 mi) | ENE | earthquakes near Scioto County |
| Greenup County, KY | 43 km (27 mi) | ESE | earthquakes near Greenup County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
20 earthquakes have been recorded within 50 km since this one.
- 1.7 15 km E of Flemingsburg, Kentucky
- 2.2 2 km SSE of Concord, Kentucky
- 2.2 7 km WSW of Vanceburg, Kentucky
- 2.4 8 km SSE of Flemingsburg, Kentucky
- 2.4 9 km NW of Olive Hill, Kentucky
- 2.4 6 km SSE of Georgetown, Ohio
- 2.2 3 km SSW of Bentonville, Ohio
- 2.5 3 km SW of Old Washington, Kentucky
- 2.4 3 km SW of Rarden, Ohio
- 2.2 20 km SSW of Vanceburg, Kentucky
- 2.1 3 km SE of Ripley, Ohio
- 3.0 2 km E of Manchester, Ohio
- 2.1 10 km S of Concord, Kentucky
- 1.8 13 km ESE of Flemingsburg, Kentucky
- 2.9 2 km SE of South Shore, Kentucky
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.