New Jersey LandslideWatch
Landslide Hazards Program in New Jersey
The term "landslide" describes a wide variety of processes that result in the downward and outward movement of slope-forming materials including rock, soil, artificial fill, or a combination of these.
The materials may move by falling, toppling, sliding, spreading, or flowing. In general, landslides can be categorized as shallow or deep-seated and this difference can determine their speed and size.
Shallow landslides typically originate in uppermost soil or rock layers on steep slopes and often form slumps or fast-moving earth and debris flows. These types of landslides are often triggered by sustained and intense rainfall and are usually fast moving. Typically the landslides that occur in New Jersey are considered shallow in nature.
Deep-seated landslides are those where the zone of failure is below the rooting depth of trees and vegetation. They are often slow moving, but can also move rapidly. Deep-seated landslides can cover large areas and devastate infrastructure and housing developments. These landslides usually occur as translational slides, rotational slides, or large block slides. Deep-seated landslides are typically much larger than shallow landslides, in terms of both surface area and volume. A deep-seated landslide may appear stable for years, decades, or even centuries. These long-lived features can be partially or entirely reactivated for a variety of reasons.1
For more information on landslide types and processes please click here
1 (Text adapted from Washington State Department of Natural Resources Landslides webpage)
Landslides in New Jersey
The New Jersey Geological and Water Survey, NJDEP Division of Water Supply and Geosciences maintains a database of Landslides in the state and updates the database as new landslides occur. This information is used by The NJ State Police, Office of Emergency Management as well as federal, state, county, local government officials and consultants to assist them in hazard mitigation planning. Landslides in New Jersey can damage homes, utilities, cover roads, highways and railroad tracks. They are responsible for millions of dollars in damages each year.
USGS Landslide Monitoring
Landslide Information and Preparedness