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.
Best Answer: Earthquakes occur daily in California, but as others have stated, most are so minor that they aren't felt. Many seem to occur in remote areas of the state where few people live, or deep within the earth. So unless you are right on top of the epicenter, and if they are less than roughly 3.5 on the Richter scale you don't notice them.