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Ancestral Pinatubo is a somma volcano with modern Pinatubo as the new cone. Mount Dorst, to the east, is part of the dip slope of the ancestral Pinatubo. Several mountains near modern Pinatubo are old satellite vents of ancestral Pinatubo, forming volcanic plugs and lava domes. These satellite vents were probably active around the same time as ...
The 1991 eruption of Mount Pinatubo in the Philippines' Luzon Volcanic Arc was the second-largest volcanic eruption of the 20th century, behind only the 1912 eruption of Novarupta in Alaska. Eruptive activity began on April 2 as a series of phreatic explosions from a fissure that opened on the north side of Mount Pinatubo .
Lake Pinatubo (Filipino: Lawa ng Pinatubo) is the summit crater lake of Mount Pinatubo formed after its climactic eruption on June 15, 1991. The lake is located in the Zambales Mountains, in Botolan, Zambales, near the boundaries of Pampanga and Tarlac provinces in the Philippines. It is about 90 km (56 mi) northwest of the capital city of Manila.
Although the mountains are volcanic in origin, [2] Mount Pinatubo is the only active volcano in the mountain range. Its eruption on June 15, 1991 was the second most powerful volcanic eruption of the 20th century after the 1912 eruption of Novarupta in Alaska.
Location of Mount Pinatubo, showing area over which ash from the 1991 eruption fell. Satellite measurements of ash and aerosol emissions from Mount Pinatubo. MLO transmission ratio - Solar radiation reduction due to volcanic eruptions
The active volcano Mount Pinatubo is located 26 km (16 mi) west, while Manila is located 75 km (47 mi) to the south. Mount Arayat was officially declared a national park in 1933 and a tourist spot in 1997. [2] [3] [4] The mountain is currently under an immense deforestation threat. [5]
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Volcanoes in the country have erupted within the last 600 years, with accounts of these eruptions documented by humans; or have erupted within the last 10,000 years . There are 100 volcanoes in the Philippines listed by the Smithsonian Institution 's Global Volcanism Program (GVP) at present, [ 6 ] of which 20 are categorized as "historical ...