• Philippines: reported earthquakes intensity-based from the hypocenter Saranggani 2018

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As a result of a magnitude 5.6 earthquake that occurred on July 3, 2018 in Sarangani, a PEIS intensity level of five was reported in several municipalities of Sarangani such as; Glan, Malapatan, Alabel and Malulngon, General Santos City, Tupi South Cotabato and Polomolok South Cotabato in the Philippines. The intensity scale was based on the PHIVOLCS Earthquake Intensity Scale, a seismic scale that measures the effect of an earthquake on a given area based on its relative effect to people, structures and objects in the surroundings. An intensity scale of five corresponds to a strong effect, with earthquakes generally felt by most people indoors and outdoors.

Effect of the earthquake occurring in Sarangani in the Philippines on July 3, 2018, by province affected (in intensity on PEIS intensity scale)

	Intensity on the PEIS
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Release date

September 2019

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Region

Philippines

Survey time period

July 3, 2018

Supplementary notes

*The intensity scale is based on PHIVOLCS Earthquake Intensity Scale (PEIS), a seismic scale used and developed by the Philippine Institute of Volcanology and Seismology (PHILVOLCS) to measure the intensity of an earthquake. 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 PHIVOLCS Earthquake Intensity Scale (PEIS) is as follows:
Intensity scale 1 - scarcely perceptible.
Intensity scale 2 - slightly felt.
Intensity scale 3 – weak.
Intensity scale 4 - moderately strong.
Intensity scale 5 - strong.
Intensity scale 6 - very strong.
Intensity scale 7 - destructive.
Intensity scale 8 - very destructive.
Intensity scale 9 – devastating.
Intensity scale 10 - completely devastating.