Disruptive up, down and sideways vibration of the ground during an earthquake. 

Effects: ground shaking are damage or collapse of structure; may consequently cause hazards such as liquefaction and landslide

Hyatt Terraces Hotel  in  Baguio City  collapsed during the  16 July 1990  Luzon Earthquake.

Phenomenon wherein sediments, especially near bodies of water, behave like liquid similar to a quicksand. 

Effects: sinking and/ or tilting of structure above it; sandboil; fissuring

Gasoline tank pops out in Dagupan City due to 'liquefaction'

Down slope movement of rocks, solid and other debris commonly triggered by strong shaking.

Effects: erosion; burial and blockage of roads and rivers

Series of waves caused commonly by an earthquake under the sea.

Effects: flooding; coastal erosion; drowning of people and damage to properties

Damaged jeep due to tsunami during the 1976 Moro Gulf earthquake