Landslides - 15 of 22

Landslides FAQs - 22 Found

What areas are most vulnerable to landslides in southern California?

Detailed locations of areas susceptible to debris flows are given on "Preliminary Soil-Slip Susceptibility Maps, Southwestern California" published as U.S. Geological Survey Open-File Report 2003-17, 46 p.


In addition, areas that have been burned by recent wildfires are highly susceptible to debris-flow activity that can be triggered by significantly less rainfall than that which triggers debris flows from unburned hillslopes. These areas are delineated in the following recent USGS Open-File Reports:



For more publications on wild-fire-burned areas please see the USGS Landslide Program Recent Publications page.


Areas of potential danger from debris flows include areas that are downslope and downstream from the susceptible areas shown on the USGS maps. Fatalities, injuries, and property damage from debris flows most commonly occur in low-lying areas such as canyon floors and near the mouths of canyons.


The California Geological Survey also has an index to landslide maps of California and you can look at the map titled "Susceptibility to Deep-Seated Landslides in California".

Tags: Landslides, Liquefaction, Maps, Precipitation, Soils