M3.3 earthquake 10 km SSE of Arnold, Nebraska
A magnitude 3.3 earthquake struck 10 km SSE of Arnold, Nebraska on Mon, Apr 9, 2018, 4:33 AM CDT (09:33 UTC), 5 km (3 mi) below the surface.
A larger quake followed: M3.7 10 km SE of Arnold, Nebraska. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 3.3 (mwr), minor
- Local time
- UTC
- 2018-04-09 09:33:49 UTC
- Depth
- 5.0 km (3.1 mi), shallow
- Epicenter
- 41.337° N, 100.139° W
- Region
- Nebraska
- Felt reports
- 46
- Tsunami flag
- No
- Status
- Reviewed by a seismologist
Did you feel it?
46 people reported to the USGS what they felt; the strongest reported shaking was IV, light shaking.
Fault motion and ground failure
How the rock slipped, from the moment tensor, and the USGS estimate of landslides and liquefaction.
- Faulting
- Oblique normal
- Moment magnitude
- 3.3 Mwr
- Nodal plane 1
- Strike 330°, dip 25°, rake -48°
- Nodal plane 2
- Strike 105°, dip 72°, rake -107°
How well it is located
Reviewed by a seismologist.
- Location uncertainty
- About 3.0 km horizontally, 2.0 km in depth
- Magnitude uncertainty
- ±0.10
- Depth from
- Operator assigned
- Station coverage gap
- 60°
- Stations used
- 34
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 6 in the 60 days after this one and 0 in the 30 days before it.
After
- 3.710 km SE of Arnold, Nebraska · 3088 days ago · 5 km deep · 2 km away · felt by 30
- 2.54 km NW of Arnold, Nebraska · 3088 days ago · 5 km deep · 15 km away · felt by 2
- 3.13 km SE of Arnold, Nebraska · 3088 days ago · 5 km deep · 7 km away · felt by 8
- 2.68 km SE of Arnold, Nebraska · 3083 days ago · 5 km deep · 3 km away · felt by 19
- 3.18 km SE of Arnold, Nebraska · 3082 days ago · 5 km deep · 4 km away · felt by 6
- 3.39 km SSE of Arnold, Nebraska · 3079 days ago · 5 km deep · 1 km away · felt by 23
Earthquakes todayNebraska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us2000dwt7. Read Wed, Sep 23, 2026, 8:42 PM UTC.