This small book is offered as a layperson's guide to earthquakes and faults in San Diego. Included are summaries of two groups of earthquakes - the strongest of all those that have struck San Diego from any source during the past two centuries, and all except the very smallest of those that have originated under the city during the last 50 years. In addition to a fault map of San Diego, ten of the most conspicuous local faults are described in some detain, and eight of those are illustrated.