Geological Hazards

Geological Hazards

Natural processes that can result in significant damage to life, property, and the environment.

Landslide

The downward movement of land, which can be caused by geology, morphology, and human activity.

Causes of Landslide

Geology (soil or rock composition), Morphology (land structure), and Human Activity (agriculture, construction).

Rainfall-Induced Landslide

A landslide triggered by prolonged or heavy rainfall, increasing land mass weight.

Impending Signs of a Rainfall-Induced Landslide

Unusual noises, increasing rumbling sounds, and rapid rise in creek water levels.

Early Warning System (EWS)

Organizations that monitor geological hazards, including PHILVOCS and PAGASA.

Sinkhole

The collapse of the surface layer of the ground.

Natural Sinkhole

A sinkhole caused by physical and chemical erosion.

Man-Made Sinkhole

A sinkhole caused by human activities such as drilling, mining, or construction.

Solution Sinkhole

A type of sinkhole formed by the erosion of bedrock leading to a depression.

Cover Subsidence Sinkhole

Occurs when soil and material cover is weak and erodes, creating cavities.

Cover Collapse Sinkhole

Rapid formation of large holes due to erosion of bedrock and weakness in soil support.

Impending Signs of a Sinkhole

New cracks in foundations, depressions at ground level, sudden appearance of craters.