QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8md

11 km WSW of Melbourne, Arkansas

· 15 km deep · released about 16 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Izard County 12 kmStone County 22 kmBaxter County 38 kmFulton County 43 kmCleburne County 49 kmSharp County 52 kmIndependence County 54 kmSearcy County 62 kmMarion County 64 km
Distance rings around the epicentre, with the nearest towns at their true direction and later quakes as coloured dots. Not a shaking map — see the USGS ShakeMap for that.
When
Magnitude
M 1.8 (md)
Depth
15 km below the surface
Felt
no reports yet
Nearest
Izard County, 12 km ENE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1356 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

How big was it?

This earthquake released about 16 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 970,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 680,000× the energy of this one
  3. Around the size people start to feel M 3.0 61× the energy of this one
  4. This earthquake M 1.8 about 16 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.

Where

Epicentre 36.0370, -92.0275. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Izard County, AR 12 km (8 mi) WSW of here earthquakes near Izard County
Stone County, AR 22 km (14 mi) NNE of here earthquakes near Stone County
Baxter County, AR 38 km (24 mi) SE of here earthquakes near Baxter County
Fulton County, AR 43 km (26 mi) SSW of here earthquakes near Fulton County
Cleburne County, AR 49 km (31 mi) N of here earthquakes near Cleburne County
Sharp County, AR 52 km (32 mi) WSW of here earthquakes near Sharp County

Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.

Aftershocks so far

9 earthquakes have been recorded within 50 km since this one.

  1. 1.7 3 km NW of Mount Pleasant, Arkansas
  2. 1.8 3 km NW of Mount Pleasant, Arkansas
  3. 2.4 4 km WNW of Mount Pleasant, Arkansas
  4. 2.1 3 km NW of Mount Pleasant, Arkansas
  5. 1.8 9 km ESE of Ash Flat, Arkansas
  6. 2.0 8 km ESE of Ash Flat, Arkansas
  7. 2.0 4 km N of Evening Shade, Arkansas
  8. 1.9 13 km SSE of Guion, Arkansas
  9. 2.1 5 km NW of Sidney, 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

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.