This collection contains 28 1×2 degree geologic maps covering the entire state of California.
The 1:250,000 scale maps were produced in the 1960s and 1970s by the USGS and State of California Division of Mines and Geology.
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USGS ShakeMaps provide near-real-time maps of ground motion and shaking intensity following significant earthquakes throughout the world. The maps show the epicenter of the earthquake and are color coded to show relative ground motion.
Individual maps are created for each earthquake event. Unfortunately, the maps must be accessed via their website. But I have created a sampling of several high profile earthquakes in recent years, which can be accessed from below.
To find the Google Earth KML version of an individual ShakeMap from the USGS Earthquake Hazards Program website, click on the name of the Earthquake, then click on Downloads and look under GIS Data on the right hand column for the KML link. Note, that not all of the earthquakes have a KML version.
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This collection of earthquake data displays large magnitude (6.5 and above) earthquakes dating back to 1900. Each earthquake is represented by a colored circle located at the approximate location of the epicenter. The color of the circle represents the number of fatalities and the size of the circle represents the the magnitude of the earthquake. In addition, the depth of the earthquake is represented by the height of the circle above the earth. In other words, the deeper the earthquake, the higher the circle is above the ground.
The information balloons also contain detailed information about the earthquake and links to webpages with more information. You can also filter the data by different magnitude ranges and use the time slider feature of Google Earth to view the data over time.
Note, when the file first loads you will need to expand the time slider to see some data.
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