QuakeIndex

Earthquake · reviewed by a seismologist

M 3.7mw

Earthquake near Mountain Home, AR

No earthquake was likely felt in Mountain Home in the 24 hours to 3:52 am CST (09:52 UTC). The last one was M 2.4, 27 km (17 mi) WSW, at 12:44 am CDT on 29 October 2026, estimated intensity II (weak) in town. Every earthquake near Mountain Home

This page: a magnitude 3.7 earthquake was recorded 23 km (14 mi) south of Mountain Home, AR, at 1:42 am CDT on 12 September 2019 (06:42 UTC), 18 km deep. 4,229 people have reported feeling it to USGS.

USGS: 13 km N of Big Flat, Arkansas

1:42 am CDT, Sep 12, 2019 · · 18 km deep · released about 5.4 tons of TNT

Every earthquake near Mountain Home Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Baxter County 18 kmMarion County 29 kmSearcy County 37 kmStone County 38 kmIzard County 44 kmOzark County 58 kmFulton County 60 kmVan Buren County 61 kmBoone County 63 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
1:42 am CDT on 12 September 2019 ()
Where
23 km (14 mi) south of Mountain Home, AR · earthquakes near Mountain Home
Magnitude
M 3.7 (mw)
Depth
18 km below the surface
Felt
4,229 reports · strongest reported intensity V
Measured shaking
intensity IV (ShakeMap)
Nearest
Baxter County, 18 km NNE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2155 days ago

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 370 km (230 mi) from the epicentre. In Mountain Home, 23 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.

Earthquakes near other towns within 30 km: Gassville, Flippin, Calico Rock, Yellville, Midway.

How big was it?

This earthquake released about 5.4 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.7 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 32,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 1,400× the energy of this one
  3. Magna, Utah 2020 M 5.7 1,000× the energy of this one
  4. This earthquake M 3.7 about 5.4 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 11× more

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 36.1278, -92.4062. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Baxter County, AR 18 km (11 mi) NNE earthquakes near Baxter County
Marion County, AR 29 km (18 mi) WNW earthquakes near Marion County
Searcy County, AR 37 km (23 mi) SW earthquakes near Searcy County
Stone County, AR 38 km (24 mi) SE earthquakes near Stone County
Izard County, AR 44 km (28 mi) E earthquakes near Izard County
Ozark County, MO 58 km (36 mi) N earthquakes near Ozark County

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

Aftershocks so far

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

  1. 2.1 13 km E of South Lead Hill, Arkansas
  2. 2.4 3 km E of Yellville, Arkansas
  3. 2.1 2 km E of Mountain Home, Arkansas
  4. 1.7 7 km WSW of Bull Shoals, Arkansas
  5. 2.1 6 km ESE of Pontiac, Missouri
  6. 2.0 14 km ENE of South Lead Hill, Arkansas
  7. 2.2 14 km E of South Lead Hill, Arkansas
  8. 1.9 13 km ENE of South Lead Hill, Arkansas
  9. 2.4 14 km E of South Lead Hill, Arkansas
  10. 1.9 14 km E of South Lead Hill, Arkansas
  11. 2.2 15 km WNW of Bull Shoals, Arkansas
  12. 2.5 14 km E of South Lead Hill, Arkansas
  13. 2.5 14 km E of South Lead Hill, Arkansas
  14. 2.3 14 km E of South Lead Hill, Arkansas
  15. 2.1 4 km N of Midway, 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.