Types

Question 1

Types Based on Structure

Answer 1

Cinder Cone
Composite
Shield

Question 2

Types Based on Activity

Answer 2

Active
Inactive
Potentially Active

Question 3

Types of Eruptions

Answer 3

Phreatic or Hydrothermal
Phreatomagmatic
Strombolian
Vulcanian
Plinian

Question 4

Types Based on Eruption

Answer 4

Phreatic or Hydrothermal
Phreatomagmatic
Strombolian Vulcanian
Plinian

Question 5

are the simplest type of volcano. They are built from particles and blobs of solidified lava ejected from a single vent.

Answer 5

Cinder Cone

Question 6

are large, typically steep-sided, symmetrical cones of large dimension formed from alternating layers of lava flows, volcanic ash, cinders, blocks, and pyroclastic materials.

Answer 6

Composite

Question 7

are large, broad volcanoes that look similar to shields from above - hence the name. These volcanoes are built almost entirely of fluid lava flow thus these volcanoes are not steep.

Answer 7

Shield

Question 8

those volcanoes that have had at least one eruption during the past 10,000 years. They are those that erupted recently and still showing regular activity like emission of gases, lava and ash flows.

Answer 8

Active

Question 9

those that have not erupted for the last 10,000 years and is not expected to erupt again in a comparable time scale of the future. There are no signs of volcanic activity for a long period of time because magma supply is cut off. Also the physical form of the volcano has signs of intensive weathering and erosion

Answer 9

Inactive

Question 10

those that have no records of volcanic activity but are morphologically young-looking.

Answer 10

Potentially Active

Question 11

a stream-driven eruption as the hot rocks come in contact with water. It is short lived, characterized by ash columns but may be a beginning of a larger eruption.

Answer 11

Phreatic

Question 12

violent eruption due to the contact between water and magma. As a result, a large column of very fine ash and high-speed and sideway emission of pyroclastic materials called base surges are observed.

Answer 12

Phreatomagmatic

Question 13

periodic, weak to violent eruption characterized by fountain lava, just like the Irazu Volcano in Costa Rica.

Answer 13

Strombolian

Question 14

characterized by tall eruption columns that reach up to 20 km high with pyroclastic flow and ash fall tephra like that of Paricutin Volcano in Mexico.

Answer 14

Vulcanian

Question 15

excessively explosive type of eruption of gas and pyroclastic materials, like in Pinatubo Volcano in Zambales.

Answer 15

Plinian