The PHIVOLCS Earthquake Intensity Scale (PEIS) is a seismic scale used and developed by the

Philippine Institute of Volcanology and Seismology The Philippine Institute of Volcanology and Seismology (PHIVOLCS, ; tl, Surian ng Pilipinas sa Bulkanolohiya at Sismolohiya) is a Philippine national institution dedicated to provide information on the activities of volcanoes, earthquakes, and ...

(PHIVOLCS) to measure the intensity of

earthquakes An earthquake (also known as a quake, tremor or temblor) is the shaking of the surface of the Earth resulting from a sudden release of energy in the Earth's lithosphere that creates seismic waves. Earthquakes can range in intensity, from ...

. It was developed as upon a specific response to the 1990 Luzon earthquake. PHIVOLCS 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. The PEIS was adopted in the Philippines in 1996 replacing the Rossi-Forel scale.

Scales

The PEIS has ten intensity scales represented in Roman numerals with Intensity I being the weakest and Intensity X being the strongest.

References

;Public domain sources * *

External links

PHIVOLCS Earthquake Intensity Scale
at the Philippine Institute of Volcanology and Seismology {{Seismic scales Seismic intensity scales 1996 introductions Geology of the Philippines Department of Science and Technology (Philippines)