Earthquake · reviewed by a seismologist
M 3.6mw
Earthquake near Harrison, AR
No earthquake was likely felt in Harrison in the 24 hours to 2:28 am CST (08:28 UTC). The last one was M 5.0, 708 km (440 mi) W, at 5:21 am CDT on 23 July 2026, estimated intensity II (weak) in town; 499 felt reports to USGS. Every earthquake near Harrison
This page: a magnitude 3.6 earthquake was recorded 19 km (12 mi) north-northeast of Harrison, AR, at 7:40 am CDT on 11 June 2017 (12:40 UTC), 5.9 km deep. 781 people have reported feeling it to USGS.
USGS: 6 km NNE of Bergman, Arkansas
95 km (59 mi) SSE of Springfield, MO
- When
- 7:40 am CDT on 11 June 2017 ()
- Where
- 19 km (12 mi) north-northeast of Harrison, AR · earthquakes near Harrison
- Magnitude
- M 3.6 (mw)
- Depth
- 5.9 km below the surface
- Felt
- 781 reports · strongest reported intensity V
- Measured shaking
- intensity IV (ShakeMap)
- Nearest
- Boone County, 11 km SW
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 3371 days ago
Earthquake alerts for Harrison, AR
Get a notification in this browser when USGS records an earthquake near Harrison, AR. 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 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 338 km (210 mi) from the epicentre. In Harrison, 19 km away, the estimate is intensity IV (light). 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: Harrison 19 km, intensity IV. Estimated for each town centre; each link is that town's own record.
How big was it?
This earthquake released about 3.8 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.6 would have released about 32 times as much.
- Northridge, California 1994 M 6.7 45,000× the energy of this one
- Mineral, Virginia 2011 M 5.8 2,000× the energy of this one
- Magna, Utah 2020 M 5.7 1,400× the energy of this one
- This earthquake M 3.6 about 3.8 tons of TNT
- Around the size people start to feel M 3.0 this one released 7.9× 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 36.3760, -92.9895. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Boone County, AR | 11 km (7 mi) | SW | earthquakes near Boone County |
| Marion County, AR | 30 km (19 mi) | ESE | earthquakes near Marion County |
| Taney County, MO | 31 km (19 mi) | N | earthquakes near Taney County |
| Carroll County, AR | 50 km (31 mi) | W | earthquakes near Carroll County |
| Newton County, AR | 56 km (35 mi) | SSW | earthquakes near Newton County |
| Ozark County, MO | 56 km (35 mi) | ENE | earthquakes near Ozark County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
60 earthquakes have been recorded within 50 km since this one.
- 1.9 13 km E of South Lead Hill, Arkansas
- 1.8 13 km ENE of South Lead Hill, Arkansas
- 2.2 13 km SW of Alpena, Arkansas
- 2.1 11 km SW of Pontiac, Missouri
- 2.0 Missouri-Arkansas border region
- 2.2 6 km E of Diamond City, Arkansas
- 1.6 6 km E of Diamond City, Arkansas
- 2.8 2 km W of Pyatt, Arkansas
- 1.9 1 km S of Yellville, Arkansas
- 2.4 6 km E of Diamond City, Arkansas
- 2.2 6 km E of Diamond City, Arkansas
- 2.0 7 km E of Diamond City, Arkansas
- 2.4 10 km ESE of Everton, Arkansas
- 2.3 4 km W of South Lead Hill, Arkansas
- 2.0 3 km S of Sundown, Missouri
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.