The intensity of an earthquake is measured using the Modified Mercalli Intensity Scale (MMI), which describes the effects of an earthquake at a particular location. This scale is based on observations of damage and human reactions to the earthquake.
PAGASA primarily focuses on weather and astronomical phenomena. The agency responsible for monitoring and reporting earthquake activity in the Philippines is the Philippine Institute of Volcanology and Seismology (PHIVOLCS). PHIVOLCS uses the Richter Magnitude Scale to measure the strength of an earthquake.
Therefore, while PAGASA is an important organization in the Philippines, it doesn't play a role in measuring earthquake intensity.
