Mount St Helen's

Question 1

What type of volcano is Mount St. Helens?

Answer 1

A composite volcano.

Question 2

Where is Mount St. Helens located?

Answer 2

In southwestern Washington.

Question 3

when did it erupt

Answer 3

May 18th 1980

Question 4

what event triggered the eruption

Answer 4

a 5.1 magnitude earthquake that struck at 8.32am

Question 5

what happened on the north side of the earthquake after the earthquake

Answer 5

a landslide

Question 6

how fast was the landslide

Answer 6

680mph

Question 7

what was the maximum temperature reached

Answer 7

300 degrees c

Question 8

what formed due to the snow and ice on the mountain

Answer 8

large torrents of water which uprooted thousands of trees

Question 9

how high in the air did plumes of ash go

Answer 9

15 miles in the air

Question 10

how many homes and bridges were destroyed

Answer 10

200 homes and 27 bridges

Question 11

how many miles of roads and railways had to rebuilt

Answer 11

185 miles of roads and 15 miles of railway

Question 12

how many people were killed

Answer 12

57 people including scientists, photographers and residents

Question 13

What effect did the lateral blast have on Mount St. Helens?

Answer 13

The lateral blast reduced the height of the volcano by about 1,300 feet.

Question 14

How large was the area devastated by the blast?

Answer 14

The blast devastated an area of about 230 square miles.

Question 15

What features were destroyed by the eruption?

Answer 15

Lakes, forests, rivers, and infrastructure like bridges and homes were destroyed.

Question 16

What was the effect of the pyroclastic flow?

Answer 16

The pyroclastic flow left the area barren and empty.

Question 17

How did the melted snow and ice contribute to the destruction?

Answer 17

They mixed with volcanic debris, causing the destruction of bridges, homes, and infrastructure.

Question 18

How did the eruption affect wildlife?

Answer 18

Thousands of animals perished, and many plant species were wiped out.

Question 19

What long-term effect did the eruption have on rivers?

Answer 19

The eruption caused rivers to become clogged with sediment, affecting fish populations long term.

Question 20

How much timber was destroyed in the eruption?

Answer 20

Approximately 4 billion feet of timber were destroyed.

Question 21

What was the economic cost of the eruption?

Answer 21

There was a substantial cost to replace damages to roads and bridges.

Question 22

How did tourism change after the eruption?

Answer 22

Initially disrupted, but over time, the area became a major tourist attraction.

Question 23

How did the eruption impact scientific research?

Answer 23

It attracted funding and attention for scientific research opportunities.

Question 24

How many people were evacuated before the eruption?

Answer 24

Thousands of people were evacuated.

Question 25

What did the eruption reveal about volcanic monitoring?

Answer 25

It uncovered the importance of volcanic monitoring to predict and mitigate future eruptions.

Question 26

What evacuation efforts took place before the eruption of Mount St. Helens?

Answer 26

Thousands of people were evacuated from high-risk areas in the months leading up to the eruption.

Question 27

What actions were taken to limit access to high-risk areas?

Answer 27

Restricted areas were established around the volcano to ensure safety.

Question 28

What was done after the eruption to aid the affected population?

Answer 28

Emergency services conducted extensive search and rescue missions.

Question 29

What types of temporary accommodations were provided?

Answer 29

Temporary shelters were set up to house those affected by the eruption.

Question 30

What was done to address the ash fallout?

Answer 30

Ash clean-up efforts involved the help of many people and resources.

Question 31

How did the government support recovery?

Answer 31

The government unlocked emergency funds to aid in the recovery process.

Question 32

How did financial support help the recovery efforts?

Answer 32

Financial aid was provided to individuals and businesses impacted by the eruption.

Question 33

What was prioritized in the rebuilding process?

Answer 33

Infrastructure repairs were prioritized to restore essential services.

Question 34

How were future eruptions monitored?

Answer 34

Monitoring systems were enhanced to better predict and prepare for future volcanic activity.

Question 35

What efforts were made to restore the landscape?

Answer 35

Over 18 million trees were planted to help restore the landscape affected by the eruption.

Question 36

What was established in 1982 to protect the area?

Answer 36

In 1982, Congress established the Mount St. Helens National Volcanic Monument, preserving the area for research.

Question 37

How did local organizations contribute to recovery efforts?

Answer 37

Local organizations provided resources and assistance to those affected by the eruption.

Question 38

How did fundraising efforts contribute to recovery?

Answer 38

Fundraising efforts helped provide additional resources for recovery.

Question 39

How did tourism impact the local economy?

Answer 39

Tourists boosted the local economy as the area became a major attraction.

Question 40

How are the lives lost in the eruption commemorated?

Answer 40

Memorials and annual events are held to remember those who lost their lives.

Question 41

How did the side of Mount St. Helens change before the eruption?

Answer 41

The side expanded by 240 ft due to pressure build up from rising magma.

Question 42

What tectonic process triggered the eruption of Mount St. Helens?

Answer 42

The subduction of the Juan de Fuca Plate beneath the North American Plate.

Question 43

What event on May 18, 1980 contributed to the eruption?

Answer 43

A magnitude 5.1 earthquake triggered the collapse of the north face.

Question 44

How did the earthquake contribute to the eruption?

Answer 44

The earthquake caused a massive landslide, exposing magma to lower pressure, leading to an explosive eruption.

Question 45

What role did gas build up play in the eruption?

Answer 45

Gas accumulation in the magma chamber increased pressure, causing an explosive release.

Question 46

What volcanic features were formed due to the eruption?

Answer 46

Pyroclastic flow, lahars, ashfall, and the formation of a crater.