MANILA, July 4 (Xinhua) — The erupting Mayon volcano, approximately 500 km southeast of the Philippine capital, has increased seismic activities, the Philippine Institute of Volcanology and Seismology warned on Tuesday.
The institute said that alert level 3 on a scale of 5 remains at the most active volcano in the Southeast Asian country, despite the persistence of “a continuous tremor-like series of weak volca