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SRU / Geology / GEOL 100 / What were the three possibilities of this mountain's activity?

What were the three possibilities of this mountain's activity?

What were the three possibilities of this mountain's activity?

Description

School: Slippery Rock University of Pennsylvania
Department: Geology
Course: Environmental Geology
Professor: Burkhart
Term: Fall 2016
Tags: Volcano, pinatubo, eruption, philippines, and Geology
Cost: 25
Name: In The Path of a Killer Volcano - Study Guide
Description: These notes were taken from the video "In The Path of a Killer Volcano." This study guide consists of all the major details and concepts that are more than likely to appear on any future quiz.
Uploaded: 10/26/2016
2 Pages 39 Views 2 Unlocks
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In The Path of a Killer Volcano – Video Study Guide


What were the 3 possibilities of this mountain’s activity?



U.S. Geological Survey

GIS Specialist: an individual that works with geographic information systems to  solve problems, present data, and store information.  

One critical part of this job is predicting if and when an eruption may occur so  they can effectively advise people to evacuate

VDAP Volcanologists: Andy Lockhart, John Power, John Ewert, Rick Hoblitt, Dave Harlow PVO – The Pinatubo Volcano Observatory

Spring 1991 – Eruption of Mount Pinatubo, Philippines

April 2, 1991: a series of small steam explosions began

When first studied, the blast the mountain was giving off was concluded to be the  volcano only giving off steam – no eruption was to occur.

However, continuous earthquakes were occurring underneath the surface which led the  U.S. Geological Survey to look further into this volcano.


What is the second-largest volcanic eruption of the 20th century?



*Approximately 50 volcanic eruptions occur each year

There were 3 possibilities of this mountain’s activity:

(1.)The mountain was only letting off steam – nonthreatening

(2.)Magma was rising from the earth’s crust – life-threatening

(3.)Tectonic stressors were occurring in the earth’s crust – not life-threatening

Heavily eroded volcanic ash and rock deposits extend for miles on every side of the mountain  which is strong evidence that when the volcano erupts it will be huge.

Tests:

∙ If there is a recorded earthquake five miles below the surface – this indicates a  threatening possibility

∙ Measuring Sulfur Dioxide (SO2) in the air surrounding the mountain – if this is  increasingly high it indicates magma


When is a series of small steam explosions began?



Alert Levels:

Alert Level One: Abnormal

Activity detected. Eruption not imminent.

Alert Level Two: Increasing Activity If you want to learn more check out Describe the mapk signalling pathway?

Activity more intense. Eruption probable.

Alert Level Three: Increasing Tendency Towards Eruption

Eruption now likely. Possibly within two weeks.

Alert Level Four: Hazardous Eruption Imminent

Eruption possible within 24 hours

Brief Timeline Leading to Eruption (major events):

June 3 – Level 2 was declared: 20,000 people evacuated

June 5 – Level 3 was declared then retracted

June 6 – Level 3 was declared again

June 7 – Level 4 was declared due to continuous earthquakes underneath the surface  Everyone within 12 miles of the mountain was to be evacuated

 In total 120,000 people temporarily evacuated

*June 7-12: first magma reached the surface of Mount Pinatubo

June 10: Full evacuation

June 12 – First Eruption takes place

Gas-charged magma reached the surface and created the volcano’s first spectacular eruption First Eruption: causes summit to give away, traps 43 people and burned them to death

June 15 – The volcano exploded in a cataclysmic eruption that ejected more than one mile *cataclysmic: can refer to earthquakes, volcanic eruptions, floods, tornados, landslide

Evacuation kept the death total at under 500

Mount Pinatubo is the second-largest volcanic eruption of the 20th century Approximately 650,000 jobs lost We also discuss several other topics like What is an inventory system where companies manufacture or purchase goods only when needed for use?
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We also discuss several other topics like Define contingency.

Approximately 50,000 permanently lost homes:

10,000 indigenous people

40,000 low land families

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