A 2.3-magnitude earthquake struck between McCloud and the Mt. Shasta Ski Park on Thursday morning, according to the United States Geological Survey.

The quake struck about three miles north of McCloud at 11:15 a.m. in the wilderness area between the ski park and the town of McCloud. The survey said the quake was roughly 2.5 miles deep.

Earthquakes of that magnitude are considered “minor” and are rarely felt by people.

This small earthquake comes after more than 20 similar earthquakes hit the area in September 2019.

“In any given year, there are about 10 to 15 earthquakes under the mountain," said Dr. Bill Hirt, a geologist and professor at College of the Siskiyous who has spent extensive time studying Mt. Shasta. After Mount St. Helens erupted in 1980, the USGS placed a network of seismographs in the Mt. Shasta area, and they are constantly being improved and checked for accuracy and activity, Hirt said.

There is always potential for a “swarm” of earthquakes, which generally last two months, Hirt said. Before the 2019 swarm, between 40 and 50 quakes shook the Mt. Shasta area in 1993. That activity lasted roughly a month, said Hirt.