4.7 earthquake in Los Angeles County

Last night there was a 4.7 earthquake in Los Angeles County. The people I talked to near the epicenter said it felt much larger than that. It was felt as far away as San Diego County, California which is very unusual for this size quake. Also, there have been many smaller aftershocks after the 4.7 occurred. Whether this means there will be more or even a bigger one I can't say. However, I don't think it hurts to be prepared for any eventuality. It's how our ancestors survived anything.