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How did scientists know to evacuate 85000 people before Mt Pinatubo erupted in May 1991?
First, the main eruption was in June, not May.
There were a number of signs, starting with earthquakes and steam explosions indicating the volcano was becoming active. Gas measurements and later earthquakes clearly showed that magma was rising. The volcano's activity gradually escalated until its climactic eruption. When a lava dome appeared on the flanks, it was a sign that Pinatubo was about ready to blow.
Furthermore, by studying deposits in the surrounding area, scientists knew that Pinatubo was prone to very large eruptions and so represent a very great danger.
What else can I help you with?
Was there time for people to evacuate before the Krakatoa erupted?
There was not enough time for people to evacuate before the Krakatoa erupted in 1883. The eruption occurred suddenly and with great force, causing widespread destruction and loss of life.
Did mount Pinatubo erupt before 1991?
Not in recorded history, but it had erupted before, otherwise there would be no Mount Pinatubo. Its last eruption before 1991 was about 600 years ago.
How much time did people have to evacuate before Mount Etna erupted?
It can vary depending on the eruption, but typically people have a few hours to evacuate before Mount Etna erupts. The volcano usually displays warning signs such as increased seismic activity, gas emissions, and surface deformation before an eruption, giving authorities time to implement evacuation measures.
How often does mount Pinatubo erupt?
Mount Pinatubo erupts on an irregular basis, about every 3,000 to 5,000 years. The last big eruption began in 1991.It typically will erupt multiple times during an eruption period before going dormant again.
What do you call molten rock before it has erupted?
What do you call molten rock before it has erupted
Was there time for people to evacuate before the Krakatoa erupted?
There was not enough time for people to evacuate before the Krakatoa erupted in 1883. The eruption occurred suddenly and with great force, causing widespread destruction and loss of life.
Did mount Pinatubo erupt before 1991?
Not in recorded history, but it had erupted before, otherwise there would be no Mount Pinatubo. Its last eruption before 1991 was about 600 years ago.
Did mt Pinatubo only erupt once?
No. It erupted several times in 1991 before and after its climactic eruption. Prior to that, though, it had not erupted in recorded history, with its last eruption occurring about 600 years ago.
How much time did people have to evacuate before Mount Etna erupted?
It can vary depending on the eruption, but typically people have a few hours to evacuate before Mount Etna erupts. The volcano usually displays warning signs such as increased seismic activity, gas emissions, and surface deformation before an eruption, giving authorities time to implement evacuation measures.
What is the synonym for evacuate?
Another synonym for evacuate is escape or lrave
How often does mount Pinatubo erupt?
Mount Pinatubo erupts on an irregular basis, about every 3,000 to 5,000 years. The last big eruption began in 1991.It typically will erupt multiple times during an eruption period before going dormant again.
Can you predict when volcano?
scientists are almost able to predict volcano eruptions because of all the signs we get that we can compare to what has happened before other volcanoes erupted...
What do you call molten rock before it has erupted?
What do you call molten rock before it has erupted
How high is the summit of Mount Pinatubo?
The summit of Mount Pinatubo is 2,300 meters high. Before the eruption in 1991, the summit was 1,745 meters high. Mount Pinatubo is located in the Philippines.
What happen before Mount Tambora erupted?
there was a small earthquake before it erupted. about 12 hours before or something.
Which volcanoes have erupted before?
Some well-known volcanoes that have erupted in the past include Mount Vesuvius in Italy, Mount St. Helens in the United States, Mount Krakatoa in Indonesia, and Mount Pinatubo in the Philippines. These volcanoes have had significant eruptions that have impacted their surrounding areas and sometimes even global climate.
What would happen if mount Pinatubo erupted again?
This would depend on the type of eruption that Pinatubo were to produce. The only record of eruption of the volcano are of the 1991 event. Although scientists know that the volcano had erupted in an explosive manner before it is unclear what other types of eruptions it can produce. Although unlikely that Pinatubo will erupt in the near future it is a possibility. The eruption is not likely to be as explosive as the 1991 event as the amount of time between eruptions of that magnitude should be longer, given the otherwise unknown history of the volcano. This would suggest that it does not erupt frequently; however, when it erupts it seems to be catastrophic in nature.
