Volcano-tectonic swarms of Mt. Pinatubo in 2021: case of deep magmatic intrusion into its plumbing system?

Winchelle Ian Sevilla1, Lois Abigail C Jumawan2, Christian Joseph M Clarito2, Mariton Bornas3 and Renato Solidum Jr.4, (1)Philippine Institute of Volcanology and Seismology PHIVOLCS, Quezon City, Philippines, (2)Philippine Institute of Volcanology and Seismology, Volcano Monitoring and Eruption Prediction Division, Quezon City, Philippines, (3)Philippine Institute of Volcanology and Seismology, Manila, Philippines, (4)Philippine Institute of Volcanology and Seismology, Quezon City, Philippines