Earthquake · reviewed by a seismologist
M 2.8mb_lg
Earthquake near Conway Springs, KS
No earthquake was likely felt in Conway Springs in the 24 hours to 5:53 pm CST (23:53 UTC). The last one was M 3.4, 201 km (125 mi) S, at 5:53 am CST on 7 November 2026, estimated intensity II (weak) in town; 23 felt reports to USGS. Every earthquake near Conway Springs
This page: a magnitude 2.8 earthquake was recorded 8 km (5 mi) south-southwest of Conway Springs, KS, at 5:30 pm CDT on 26 April 2018 (22:30 UTC), 4.7 km deep. 9 people have reported feeling it to USGS.
USGS: 7 km SSW of Conway Springs, Kansas
50 km (31 mi) SW of Wichita, KS
- When
- 5:30 pm CDT on 26 April 2018 ()
- Where
- 8 km (5 mi) south-southwest of Conway Springs, KS · earthquakes near Conway Springs
- Magnitude
- M 2.8 (mb_lg)
- Depth
- 4.7 km below the surface
- Felt
- 9 reports · strongest reported intensity V
- Nearest
- Sumner County, 19 km ESE
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 1557 days ago
Earthquake alerts for Conway Springs, KS
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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 62 km (39 mi) from the epicentre. In Conway Springs, 8 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.
Likely felt in: Conway Springs 8 km, intensity III · Wellington 28 km, intensity III · Caldwell 33 km, intensity II · Cheney 35 km, intensity II · Belle Plaine 36 km, intensity II · Anthony 37 km, intensity II · Haysville 39 km, intensity II · Derby 43 km, intensity II. Estimated for each town centre; each link is that town's own record.
How big was it?
This earthquake released about 480 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.8 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 32,000× the energy of this one
- Magna, Utah 2020 M 5.7 22,000× the energy of this one
- Around the size people start to feel M 3.0 2× the energy of this one
- This earthquake M 2.8 about 480 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 37.3281, -97.6776. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Sumner County, KS | 19 km (12 mi) | ESE | earthquakes near Sumner County |
| Harper County, KS | 38 km (23 mi) | WSW | earthquakes near Harper County |
| Sedgwick County, KS | 44 km (27 mi) | NNE | earthquakes near Sedgwick County |
| Kingman County, KS | 48 km (30 mi) | WNW | earthquakes near Kingman County |
| Grant County, OK | 61 km (38 mi) | S | earthquakes near Grant County |
| Kay County, OK | 74 km (46 mi) | SE | earthquakes near Kay County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
59 earthquakes have been recorded within 50 km since this one.
- 3.0 8 km NNE of Harper, Kansas
- 1.5 9 km WSW of Hunnewell, Kansas
- 1.8 8 km WSW of Hunnewell, Kansas
- 2.0 4 km E of Bluff City, Kansas
- 2.5 5 km E of Bluff City, Kansas
- 2.0 5 km E of Bluff City, Kansas
- 1.8 2 km SSE of Bluff City, Kansas
- 1.8 8 km WSW of Hunnewell, Kansas
- 2.3 8 km N of Caldwell, Kansas
- 2.9 8 km NNE of Caldwell, Kansas
- 1.7 2 km SSE of Freeport, Kansas
- 1.6 3 km SSE of Milan, Kansas
- 1.6 Kansas
- 1.9 12 km SSE of Milan, Kansas
- 2.0 5 km SE of Freeport, Kansas
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.