Sheriff's Department officials reported receiving dozens of calls from residents around the county who reported feeling shaking and loud booms at three different times before about 1:30 p.m. Residents from California Valley to Arroyo Grande reported feeling the shaking and hearing the booms.

Military aircraft appear to be responsible for sonic booms and shaking that residents around the county are feeling this afternoon, officials said.

Edwards Air Force Base officials said they sent an F-22 airplane out to a testing area about 50 miles off the coast this morning that could have explained the rattling residents reported, base public affairs spokesman John Haire said. But the area is also used by other branches of the U.S. military that could have had aircraft in the area, Haire said.

In addition, NASA was conducting sonic boom testing this morning at the base that may have been heard by residents along the coast. The base is located in the Mojave Desert, near the Kern and Los Angeles county line.