Hazards- Ao2

Question 1

What is the ring of fire?

Answer 1

The ring of fire is a 25,000 mile stretch home to 75% of the worlds volcanoes

Question 2

What was the Toba eruption, and why is it significant?

Answer 2

A super volcanic eruption (VEI 8) in Indonesia 74,000 years ago, causing a global winter (6-10 years) and nearly wiping out humanity.

Question 3

How many volcanoes erupt each month?

Answer 3

estimated 50-60 volcanoes erupt each month.

Question 4

What is the most active volcano?

Answer 4

Mount Yasur- the most active volcano erupting every 15 minutes on average. It is located on Tanna Island in Vanuatu

Question 5

give an example of a Hawaiian eruption style

Answer 5

Mauna Loa- 1950 with lava flows up to 16 miles and over 1.5 million dollars of damage

Question 6

Give an example of strombolian eruption style

Answer 6

Stromboli- island off the north coast of Sicily that has been erupting continuously since 1932

Question 7

Give an example of the vulcanian eruption style

Answer 7

The Semeru- Located in Indonesia where 55 eruptions have been recored consisting of lava flows and pyroclastic flows

Question 8

Give an example of Plinian eruption style

Answer 8

Mount Vesuvius- eruption in 79AD which destroyed the ancient roman city of Pompeii by spewing a cloud of super-heated tephra at 1.5 million tons per second and releasing 100,000 times the thermal energy of atomic bombs.

Question 9

Talk about the Nevado del Ruiz eruption

Answer 9

• November 13, 1985, in Colombia
• ne of the deadliest volcanic disasters in history, killing ~23,000 people,
• Despite clear warning signs, including increased seismic activity, gas emissions, and glacier melting, authorities failed to act in time
• When the volcano erupted (VEI 3), it melted 5-10% of its glacier, triggering lahars moving at 50 km/h, which destroyed everything in their path