Earthquake · reviewed by a seismologist
M 1.9md
Earthquake near Lepanto, AR
USGS: 5 km W of Lepanto, Arkansas
68 km (42 mi) NNW of Memphis, TN · 35 km (22 mi) SE of Jonesboro, AR
- When
- 10:19 am CDT on 20 April 2018 ()
- Where
- 5 km (3 mi) W of Lepanto, AR · earthquakes near Lepanto
- Magnitude
- M 1.9 (md)
- Depth
- 8.4 km below the surface
- Felt
- no reports yet
- Nearest
- Poinsett County, 27 km WSW
- 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 3087 days ago
A magnitude 1.9 earthquake was recorded 5 km (3 mi) W of Lepanto, AR, at 10:19 am CDT on 20 April 2018 (15:19 UTC). This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.
Earthquakes near other towns within 30 km: Marked Tree, Trumann, Caraway, Bay, Lake City.
How big was it?
This earthquake released about 18 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.9 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 840,000× the energy of this one
- Magna, Utah 2020 M 5.7 600,000× the energy of this one
- Around the size people start to feel M 3.0 53× the energy of this one
- This earthquake M 1.9 about 18 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 35.6177, -90.3845. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Poinsett County, AR | 27 km (17 mi) | WSW | earthquakes near Poinsett County |
| Craighead County, AR | 32 km (20 mi) | NW | earthquakes near Craighead County |
| Mississippi County, AR | 34 km (21 mi) | ENE | earthquakes near Mississippi County |
| Crittenden County, AR | 47 km (29 mi) | S | earthquakes near Crittenden County |
| Cross County, AR | 50 km (31 mi) | SW | earthquakes near Cross County |
| Greene County, AR | 58 km (36 mi) | NNW | earthquakes near Greene County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
35 earthquakes have been recorded within 50 km since this one.
- 1.5 3 km S of Dell, Arkansas
- 1.5 8 km SSE of Manila, Arkansas
- 1.6 5 km NNW of Marked Tree, Arkansas
- 1.6 3 km ENE of Dell, Arkansas
- 2.1 8 km N of Etowah, Arkansas
- 2.2 5 km SSE of Cherry Valley, Arkansas
- 1.9 9 km SE of Wilson, Arkansas
- 3.6 3 km WNW of Marked Tree, Arkansas
- 1.7 5 km ENE of Caraway, Arkansas
- 1.5 5 km W of Marked Tree, Arkansas
- 1.7 3 km E of Dell, Arkansas
- 1.7 3 km S of Dell, Arkansas
- 1.9 6 km ENE of Caraway, Arkansas
- 2.2 5 km SSE of Manila, Arkansas
- 2.4 1 km ESE of Jericho, 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.