What was the first sign that mt. pinatubo had awoken?
No context provided
What was the first sign that mt. pinatubo had awoken in 33,000 BC?
explosive eruptions
The first magmatic eruptions occurred on June 3, and the first large blast on June 7 generated ash columns high. The Philippine Institute of Volcanology and Seismology (PHIVOLCS) immediately issued a warning indicating the possibility of a major eruption within two weeks.
What was the first sign that mt. pinatubo had awoken in 7000 BC?
eruptions
Mount Pinatubo
The first magmatic eruptions occurred on June 3, and the first large blast on June 7 generated ash columns high. The Philippine Institute of Volcanology and Seismology (PHIVOLCS) immediately issued a warning indicating the possibility of a major eruption within two weeks.
What was the first sign that mt. pinatubo had awoken from 4000 BC to 3000 BC?
eruptions
Mount Pinatubo
The first magmatic eruptions occurred on June 3, and the first large blast on June 7 generated ash columns high. The Philippine Institute of Volcanology and Seismology (PHIVOLCS) immediately issued a warning indicating the possibility of a major eruption within two weeks.
What was the first sign that mt. pinatubo had awoken in 1500?
eruptions
Mount Pinatubo
No context provided
What was the first sign that mt. pinatubo had awoken in 1991?
volcano tectonic earthquakes
Mount Pinatubo
https://en.wikipedia.org/wiki/Mount%20Pinatubo
Mount Pinatubo (Sambal: Bakil nin Pinatobo; Kapampangan: Bunduk/Bulkan ning Pinatubu, Bunduk ning Apu Malyari; Pangasinan: Palandey/Bulkan na Pinatubu; Ilocano: Bantay Pinatubo; Tagalog: Bundok/Bulkang Pinatubo IPA: [pinɐtubɔ]) is an active stratovolcano in the Zambales Mountains, located on the tripoint boundary of the Philippine provinces of Zambales, Tarlac and Pampanga, all in Central Luzon on the northern island of Luzon.[4][5] Its eruptive history was unknown to most before the pre-eruption volcanic activity of early 1991.
Mount Pinatubo
c. 33,000 BC: After a long period of dormancy, Modern Pinatubo was born in Ancestral Pinatubo's cataclysmic and most explosive eruptions, estimated to be five times larger than the June 1991 eruption.
Mount Pinatubo Modern Pinatubo
c. 7000 BC (Pasbul Eruptive Period). Its eruptions were as energetic, if not as voluminous as the Inararo eruptions.
Mount Pinatubo Modern Pinatubo
c. 4000–3000 BC (Crow Valley Eruptive Period). This and the Mara-unot period's eruptions were smaller than the Inararo eruptions but about two to three times as big as that of 1991 based on the pyroclastic flow runout distances and depths of valley filling.
Mount Pinatubo Modern Pinatubo
c. AD 1500 (Buag Eruptive Period). Its eruptions were roughly the same size as those of 1991.
Mount Pinatubo Modern Pinatubo
In March and April 1991, magma rising toward the surface from more than 32 km (20 mi) beneath Pinatubo triggered small volcano tectonic earthquakes and caused powerful steam explosions that blasted three craters on the north flank of the volcano.
Mount Pinatubo 1991 eruption
Mount Pinatubo is an active stratovolcano in the Zambales Mountains on the northern island of Luzon. Its eruptive history was unknown to most before the pre-eruption volcanic activity of early 1991. In 33,000 BC after a long period of dormancy, Modern Pinatubo was born in Ancestral Pinatubo's cataclysmic and most explosive eruptions, estimated to be five times larger than the June 1991 eruption. In 7000 BC, its eruptions were as energetic, if not as voluminous as the Inararo eruptions. In 4000–3000 BC, the eruptions were smaller than the Inararo eruptions but about two to three times as big as that of 1991 based on the pyroclastic flow runout distances and depths of valley filling. In AD 1500, its eruptions were roughly the same size as those of 1991. In March and April 1991, magma rising toward the surface from beneath Pinatubo triggered small volcano tectonic earthquakes and caused powerful steam explosions that blasted three craters on the north flank of the volcano.