Where was Mount Pinatubo located in the Philippines?
The location of Mount Pinatubo and the regional ash fallout from the 1991 eruption. The volcano is 87 km (54 mi) northwest of Manila, the capital of the Philippines. Near Mount Pinatubo, the United States maintained two large military bases in the region.
Where did the ash fall from Mount Pinatubo?
Damage from volcanic ash fall at Clark Air Force Base from the June 15, 1991 eruption of Mount Pinatubo. Damage to Clark Air Force Base airplane hangers collapsed under the weight of wet volcanic ash from the eruption of Mount Pinatubo in 1991.
Where did the Pinatubo volcano produce pyroclastic flows?
It produced pyroclastic flows that entered all valley of Pinatubo except the Gumain and Porac rivers.
Is the Mount Dorst part of the Pinatubo volcano?
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.
Where are Mount Negron and Mount Pinatubo located?
Pinatubo belongs to the Cabusilan sub-range of the Zambales Mountains, which consists of Mount Cuadrado, Mount Negron, Mount Mataba and Mount Pinatubo. They are subduction volcanoes, formed by the Eurasian Plate sliding under the Philippine Mobile Belt along the Manila Trench to the west.
What kind of rock is Mount Pinatubo made of?
Pinatubo is flanked on the west by the Zambales Ophiolite Complex, which is an easterly-dipping section of Eocene oceanic crust uplifted during the late Oligocene. The Tarlac Formation north, east and southeast of Pinatubo consists of marine, nonmarine and volcanoclastic sediments formed in the late Miocene and Pliocene.
How long did the eruption of Mount Pinatubo last?
The Eruption. On June 15, the eruption of Mount Pinatubo began at 1:42 p.m. local time. The eruption lasted for nine hours and caused numerous large earthquakes due to the collapse of the summit of Mount Pinatubo and the creation of a caldera.
How did Mount Pinatubo affect the stratosphere?
Pinatubo injected about 15 million tons of sulfur dioxide into the stratosphere, where it reacted with water to form a hazy layer of aerosol particles composed primarily of sulfuric acid droplets. Over the course of the next two years strong stratospheric winds spread these aerosol particles around the globe.
How big was the eruption of Pinatubo in 1991?
June 12, 1991, it erupted, resulting in the second-largest eruption of the 20 th century. The ash plume height reaching more than 40 km (28 mi) high and ejecting more than 10 km 3 of magma, classifying it as plinian /ultra plinian eruption style and VEI 6 in eruption size.
https://www.youtube.com/watch?v=y9fvBHTaqto