General

• Earthquakes - introduction to earthquakes, historic quakes, where earthquakes occur, how they happen, how they are measured, and efforts to predict earthquakes.
• Earthquake Science Explained - is a series of short articles written by USGS scientists discussing state-of-the-art thinking and current technology
• USGS Earthquake Hazards Program - earthquake hazards and research, links to teaching resources, and current & past earthquake activity.
• Quaternary Faults and Fold Database of the U.S. - information on faults and associated folds in the U.S. that are believed to be sources of M>6 earthquakes during the Quaternary (the past 1,600,000 years); maps of these geologic structures have detailed descriptions and references.
• Tsunamis & Earthquakes - uses animation & virtual reality to show how tsumanis are generated by earthquakes. Learn about tsunami research & mitigation efforts -- how sediments are transported by a tsunami, how researchers decipher the geologic record of prehistoric tsunamis, & the seismograph network of the west coast tsunami warning system. (USGS)

Facts about

• Earthquake Preparedness
• FAQs about Earthquakes, Faults, Plate Tectonics, and Earth Structure
• the Severity of an Earthquake - explains the difference between intensity and magnitude and What is Earthquake Intensity?
• Epicenter
• Measuring the Size of an Earthquake
• Earthquake Effects

Maps and Photos

• Locating Earthquakes
• Earthquake Maps - seismic hazard maps, earthquake maps, site response, and fault and landform maps.
• National Seismic Hazard Maps - national maps of ground motion
• Shake Maps - regional maps of ground motion and shaking intensity
• Maps of Recent Earthquake Activity in California-Nevada - popular USGS "Quake" website for daily earthquake activity in California and Nevada
• Earthquake Probability Map for San Francisco Bay Area
• Earthquake Photos

Recent Earthquake Activity

• in the U.S.
• Around the World

California and the San Andreas Fault

• Earthquake History of California
• System, California, (USGS Professional Paper 1515) - a technical and exhaustive resource of information about the San Andreas Fault and is an essential companion to all published research about the fault system.
• Geology Fieldtrip Guidebook To Selected Stops On Public Lands - descriptions of the section of the San Andreas Fault that ruptured in the Great San Francisco Earthquake of 1906 with places the public can go; introductory materials include an overview of the system, geology, landscape features, and plant communities that reveal information about the underlying geology.
• San Andreas Fault - general interest publication describing the system and its history of earthquakes.
• Faults in Southern California - detailed information about major active faults there
• Putting Down Roots In Earthquake Country: Your Handbook For the San Francisco Bay Region - general interest publication provides information about San Francisco Bay region earthquakes (cause, history, probabilities, effects) and provides detailed information about how to be prepared when a major earthquake happens. The guide identifies specific steps to improve your safety before, during, and following an earthquake. This "must read" document provides sound advice for anyone living in a potential disaster zone.
• The Great 1906 San Francisco Earthquake: 100 Years Later - simulations of ground shaking, earthquake intensity maps, virtual tour of the San Francisco Bay Area faults and earthquake history including ground shaking maps, historic photographs, and quotes from earthquake survivors using Google Earth, earthquake survival handbook for San Francisco Bay region, digital map of the Hayward Fault, liquefaction susceptibility maps, and much more.