MANILA, Philippines — State seismologists said Friday that Mayon recorded five volcanic earthquakes and 361 rockfalls from 5:00 a.m. July 13 to 5:00 a.m. July 14.
The Philippine Institute of Volcanology and Seismology (Phivolcs) also said in its latest bulletin that Mayon had seven pyroclastic density currents (PDCs) generated by the collapse of a dome and lava front during its last 24-hour monitoring.
READ: Increased pyroclastic flow observed in Mayon
PDC refers to mixtures of fragmented volcanic particles, hot gases, and ash that rush down the slopes of the volcano or rush out of a vent at high velocities.
READ: LIVE UPDATES: Mayon Volcano
The previous 24-hour observation period showed that Mayon recorded 10 PDCs, three volcanic earthquakes, and 286 rockfall events.
Phivolcs raised the alert level for Mayon volcano to 3 from June 8. His officials also said Mayon’s concern may last for several months.
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