On the evening of February 23, 2025, a minor earthquake measuring 2.8 on the Richter scale occurred in south-central Nebraska.
The United States Geological Survey (USGS) reported that the tremor took place at 8:46 p.m. CST, approximately 10 kilometers east of Cowles, Nebraska, at a depth of 9.7 kilometers.
Details of the Seismic Event
The earthquake’s epicenter was located about 29 miles south of Hastings, Nebraska, in Webster County. Despite the quake’s light magnitude, residents in parts of southern Nebraska and northern Kansas may have experienced minor tremors. No damage or injuries have been reported.
Historical Context of Earthquakes in Nebraska
While Nebraska is not typically known for seismic activity, the state has experienced occasional earthquakes. The most significant earthquake in Nebraska’s history occurred on November 15, 1877, featuring two shocks 45 minutes apart, with the second being the strongest.
At North Platte, the shock lasted approximately 40 seconds, causing buildings to rock in Lincoln and wall damage in Columbus. The tremor was strongly felt in Omaha, and cracked walls were reported in Sioux City, Iowa.
The total affected area covered approximately 360,000 square kilometers, including most of Nebraska and portions of Iowa, Kansas, the Dakotas, and northwestern Missouri.
In more recent times, a series of minor earthquakes occurred near Arnold, Nebraska, in 2018. Between April 9 and April 17 of that year, six earthquakes with magnitudes ranging from 2.7 to 4.1 were recorded in the area. These events were part of a sudden increase in seismic activity in central Nebraska during that period.
Understanding the Humboldt Fault Zone
The Humboldt Fault Zone, a series of normal faults extending from Nebraska southwestward through most of Kansas, is a significant geological feature in the region.
Although Kansas ranks 45th out of 50 states in terms of earthquake damage, the north-central part of the state, particularly Riley and Pottawatomie counties, is more susceptible to seismic activity.
The largest earthquake in Kansas history, the 1867 Manhattan earthquake, occurred near the town of Wamego and was estimated at 5.5 on the Richter scale. This event was reportedly felt as far away as Dubuque, Iowa.
Seismic Activity Data in Nebraska
Based on data from the past 55 years, Nebraska experiences an average of 7.5 earthquakes per year. These events are typically minor, with most causing little to no damage.
The state’s seismic activity is monitored by various agencies, including the USGS, to ensure accurate reporting and assessment of potential risks.
Notable Earthquakes in Nebraska History
| Date | Location | Magnitude | Description |
|---|---|---|---|
| April 24, 1867 | Near Lawrence, KS | N/A | Affected an area of approximately 780,000 km², including much of Nebraska. |
| November 15, 1877 | North Platte, NE | N/A | Two shocks 45 minutes apart; the second was the strongest. Buildings rocked in Lincoln; walls damaged in Columbus. |
| July 30, 1934 | Dawes County, NE | N/A | Affected about 60,000 km² in Nebraska, South Dakota, and Wyoming. Minor damage reported in Chadron, NE. |
| March 28, 1964 | Near Merriman, NE | 5.1 | Jolted approximately 233,000 km² of western Nebraska, South Dakota, and border areas of Montana and Wyoming. |
| February 23, 2025 | Near Cowles, NE | 2.8 | Minor tremor felt in parts of southern Nebraska and northern Kansas; no damage reported. |
Preparedness and Safety Measures
While significant earthquakes are rare in Nebraska, residents are encouraged to stay informed about seismic activity and understand safety measures.
The Great Central U.S. ShakeOut is an annual event that educates the public on earthquake preparedness, offering guidelines on how to protect oneself during seismic events.
FAQs
Are earthquakes common in Nebraska?
Earthquakes are relatively uncommon in Nebraska; however, the state has experienced occasional seismic events, with an average of 7.5 earthquakes per year over the past 55 years.
What was the largest earthquake recorded in Nebraska?
The most significant earthquake in Nebraska’s history occurred on November 15, 1877, causing buildings to rock in Lincoln and wall damage in Columbus.
What is the Humboldt Fault Zone?
The Humboldt Fault Zone is a series of normal faults extending from Nebraska southwestward through most of Kansas, associated with occasional seismic activity in the region.