There are generally two types of hay bales. With quite different weights. The most common ones that people buy at feed stores or the farmer, and can be moved by one person, are the type you may have bucked into the barn for your uncle who had a farm when you were a teenager. They are around 3-4 feet long by 24x18 inches square.
How Earthquakes Happen. An aerial view of the San Andreas fault in the Carrizo Plain, Central California. An earthquake is the vibration, sometimes violent, of the Earth's surface that follows a release of energy in the Earth's crust. This energy can be generated by a sudden dislocation of segments of the crust, by a volcanic eruption, or event by manmade explosions.
LOS ANGELES â A magnitude-5.2 earthquake rocked Southern California early Friday, rousing residents out of bed around 1:05 a.m. local time. The quake's center was located about 13 miles north-northwest near Borrego Springs in the desert east of Los Angeles, the U.S. Geological Service reported. 1  On the west side of Los Angeles, about 100 miles from the epicenter, the quake produced a long shaking motion lasting about 30 seconds.