Calculated by the California Geological Survey, this map shows areas that are susceptible to deep-seated landslides based on the location of past landslides, the location and relative strength of rock units, and steepness of slope.  Darker reds indicate areas of increased landslide susceptibility.  Note: This map does not include information on landslide triggering events, such as rainstorms or earthquake shaking, nor does it address susceptibility to shallow landslides such as debris flows. The second map of this series is an inventory of landslide events documented by the CGS. You can click any feature for more information about the slide event.