An earthquake is vibrations in the earth’s crust causing the ground to shake. California registers one every 20 minutes; however, almost eighty percent of them are unnoticed by a human being. But, every time a big one hits, people in general don’t know what to do or how to react to it. That’s why every person who lives in San Diego should know the two main procedures to follow in case of seismic activity.
One of the most common scenarios is while inside of a building. Generally people experience tremor
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