ARNOLD, Neb.-- The ninth earthquake in less than one month shakes Custer County. It hit Sunday night, south and east of Arnold. It was 2.8 on the Richter Scale.
This latest series of earth quakes started June 30, 2018.
UPDATE: Thurs., July 5, 2018
An eighth earthquake shook southwest of Callaway Thursday morning at 5:04. It measured 2.7 on the Richter Scale, and it was 3 miles deep.
Julie Dutton, a geophysicist with the USGS National Earthqauke Information Center in Golden, Colorado, said these earthquakes are not all that uncommon.
Dutton said stress is building up on one of the fault lines that sits near Arnold, Nebraska. She said it is then released in different areas of the fault line.
Dutton said what is happening in Arnold is called a 'swarm' and it is not unusual for it happen in different areas of the United States.
Similar things are happening in areas of Texas and Oklahoma.
Dutton said they can't predict when the next one will happen or the frequency in which the earthquakes take place.
UPDATE: Tues., July 3, 2018
A seventh earthquake hit Arnold Tuesday afternoon at 3:15. It registered with a magnitude of 3.8. It happened at a nine mile depth.
UPDATE: Tues., July 3, 2018
Make it six as another earthquake hit Arnold Monday afternoon. It shook the Custer County area at 4:43 p.m. It wasn't as big as the five others, as it registered 2.7 on the Richter Scale. It happened about 3 miles underground.
UPDATE: Monday, July 2, 2018
The number of earthquakes shaking the ground below Arnold, Nebraska, is now pushing five. Three earthquakes happened Sunday, between 2 a.m. and 4 a.m. The strongest was a 4.1 that happened at 3:41 a.m.
Monday morning's quake measured 3.8 on the Richter Scale. Today's quake was three miles below the surface. This earthquake follows quakes starting Friday night through Sunday.
The United States Geological Service just updated Friday's earthquake strength to 4.1.
UPDATE: Sun., July 1, 2018
Another earthquake shakes near Arnold early Sunday morning at 3:41am.
The U.S. Geological Survey notes the magnitude of this quake as 4.1. The depth of the earthquake reached more than six miles.
This follows Friday night's 4.2 magnitude earthquake and at least six other earthquakes that happened during a week's time in April near Arnold.
An earthquake rumbles near Arnold on Friday at 11 p.m.
The magnitude of the earthquake is listed as 4.2, according to the U.S. Geological Survey. The depth of the earthquake is uncertain.
The U.S. Geological Survey report indicates that people felt the quake as far away as North Platte.
The Arnold area has felt numerous earthquakes in 2018. In April, six earthquakes rumbled within a week time frame. The magnitude of those quakes ranged from 2.5 to 3.7.