Lesson 5 Flashcards
a vent on the Earth’s surface that opens downward to a pool of molten rock, debris, and gases
Volcano
Its formation involves the process of subduction
Volcano
CLASSIFICATION OF VOLCANOES
- Active Volcano
- Potentially Active Volcano
- Inactive Volcano
It is currently erupting or is showing signs of volcanic eruption and it should have also erupted within the last 600 years.
Active Volcano
Examples for active volcanos
- Mt. Hibok-Hibok in Camiguin
- Mt. Mayon in Albay
- Mt. Pinatubo
- Mt. Taal in Batangas
it is one that has erupted and then entered a long period of inactivity. Mt. Pinatubo was a dormant volcano for about 600 years until it explosively erupted in 1991.
Potentially active volcano
It is one that has not shown any sign of activity for a long period and it has no record of volcanic eruption in the past thousand years.
Inactive volcano
Examples for potentially active volcanos
Mt. Apo in Davao
Examples for inactive volcanos
Mt. Cabalian in Leyte
VOLCANIC ERUPTION HAZARDS
- Lava Flow
- Pyroclastic Flow
- Tephra Falls
- Ballistic Projectiles
- Volcanic Gas
- Lahar
it is a mass of magma that flows down the slope of the volcano and can cause injuries and burn structures and vegetation.
Lava Flow
These are showers of fine to coarse-grained volcanic materials and other airborne products of a volcanic eruption.
Tephra Falls
Refers to hot dry masses of fragmented volcanic materials that move along the slope and the ground surface at a speed greater than 60km per hour.
PYROCLASTIC FLOW
These are rocks that are released into the air by an erupting volcano.
Ballistic Projectiles
It is one of the basic components of magma or lava. This creates acid rain that can harm plants, marine life, and infrastructures.
VOLCANIC GAS
It is a flowing mixture of volcanic debris and water with two classifications: primary or hot lahar that is associated directly with volcanic eruption, and the secondary or cold lahar caused by heavy rainfall.
LAHAR
