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Phivolcs: No Taal Volcano eruption, just a thunderstorm

Phivolcs: No Taal Volcano eruption, just a thunderstorm May 23, 2021 9:35 PM PHT Rappler.com The Philippine Institute of Volcanology and Seismology (Phivolcs) clarified that Taal Volcano did not erupt on Sunday evening, May 23, contrary to rumors spreading on social media. A video posted online showed what appeared to be lightning in Batangas, where the volcano is located. Science and Technology Undersecretary Renato Solidum Jr., officer-in-charge of Phivolcs, told media that the lightning came from a thunderstorm and was in no way connected to Taal Volcano. On its Facebook page, Phivolcs also posted footage showing the Taal Volcano main crater, taken between 7:30 pm and 8:30 pm on Sunday.

[OPINION] Beneath the waters of Subic Bay an old pyroclastic-flow deposit, and many faults

[OPINION] Beneath the waters of Subic Bay an old pyroclastic-flow deposit, and many faults Apr 22, 2021 10:00 AM PHT Kelvin S. Rodolfo The following is the fourth in a series of excerpts from Kelvin Rodolfo s ongoing book project Tilting at the Monster of Morong: Forays Against the Bataan Nuclear Power Plant and Global Nuclear Energy. My research path has taken some strange karmic turns. It led our tropa of Phivolcs geologists to study the small lahars of Mt. Mayon in the 1980s, almost as if we were being prepared for our life-saving work in the 1990s on the catastrophic lahars of Pinatubo. Afterwards, it involved my colleague Fernando Siringan, his students, and me in geological research to either side of Mt. Natib, first in Subic Bay to the west, then in the coastal plains of Pampanga and Bulacan east of Natib. 

[OPINION] Sear, kill, obliterate: On pyroclastic flows and surges

[OPINION] Sear, kill, obliterate: On pyroclastic flows and surges Apr 5, 2021 2:00 PM PHT Kelvin S. Rodolfo The following is the third in a series of excerpts from Kelvin Rodolfo s ongoing book project Tilting at the Monster of Morong: Forays Against the Bataan Nuclear Power Plant and Global Nuclear Energy. The most lethal of volcanic hazards that threaten the BNPP are pyroclastic flows. Unlike the volcanic landslides that Cojuangco was referring to which don’t go very far, pyroclastic flows can travel more than a hundred kilometers.   Some pyroclastic flows form out of a single large volcanic belch. Others happen when hot gases mixed with fragmental debris and blobs of lava gush violently high into the atmosphere. Pinatubo in 1991 flung up an eruption column that towered more than 19 kilometers above the ground. 

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