The 17 January 1994 Northridge, California, earthquake (M=6.7)triggered more than 11,000 landslides over an area of about 10,000km2. Most of the landslides were concentrated in a 1,000-km2 areathat includes the Santa Susana Mountains and the mountains north ofthe Santa Clara River valley. We mapped landslides triggered by theearthquake in the field and from 1:60,000-scale aerial photographyprovided by the U.S. Air Force and taken the morning of theearthquake; these were subsequently digitized and plotted in aGIS-based format, as shown on the accompanying maps (which also areaccessible via Internet). Most of the triggered landslides wereshallow (1-5 m), highly disrupted falls and slides in weaklycemented Tertiary to Pleistocene clastic sediment. Average volumesof these types of landslides were less than 1,000 m2, but many hadvolumes exceeding 100,000 m2. Many of the larger disrupted slidestraveled more than 50 m, and a few moved as far as 200 m from thebases of steep parent slopes. Deeper ( >5 m) rotational slumps andblock slides numbered in the hundreds, a few of which exceeded100,000 m2 in volume. The largest triggered landslide was a blockslide having a volume of 8X10E06 m2. Triggered landslides damaged ordestroyed dozens of homes, blocked roads, and damaged oil-fieldinfrastructure. Analysis of landslide distribution with respect tovariations in (1) landslide susceptibility and (2) strong shakingrecorded by hundreds of instruments will form the basis of a seismiclandslide hazard analysis of the Los Angeles area.