The Philippine Institute of Volcanology and Seismology ( PHIVOLCS ) stated that the volcano Mount Pinatubo , located near the earthquake 's epicenter , has not shown any " anomalous activity " . Pinatubo is known for its major eruption in 1991 , which may have been related to a major 7.7 magnitude earthquake in 1990 . PHIVOLCS added that the earthquake would not trigger an eruption of Pinatubo , stating that the volcano 's magma supply has not sufficiently replenished since 1991 to allow for another eruption
major 7.7 magnitude earthquake in 1990
1990 Luzon earthquake
2019 Luzon earthquake