It was developed as a response to the 1990 Luzon earthquake . PHILVOLCS cites seismic scale specifically developed for the Philippine setting , the different geography of each country and other " geological considerations " led to the development of PEIS . The scale measures the effect of an earthquake on a given area based on its relative effect to people , structures and objects in the surroundings
1990 Luzon earthquake
1990 Luzon earthquake
PHIVOLCS Earthquake Intensity Scale