Earthquake Impact and Causes

The video explores the seismic activity in the circum-Pacific region, known as the Pacific Ring of Fire, focusing on the subduction zones that produce significant earthquakes and volcanoes. It highlights the earthquake patterns in South America, including the 1960 Chile megathrust earthquake and the concept of flat-slab subduction. The video also discusses historical earthquakes, their impacts, and the importance of earthquake and tsunami education and infrastructure resilience in this seismically active region.

What percentage of the world's earthquakes occur in the circum-Pacific region?

• 80%

• 70%

• 60%

• 50%

Which tectonic plates are involved in the subduction process beneath South America?

• South American and African

• Nazca and Pacific

• Nazca and South American

• Pacific and South American

What is the term used to describe the subduction where the oceanic plate slides horizontally beneath the continental plate?

• Flat-slab subduction

• Oblique subduction

• Steep-slab subduction

• Vertical subduction

What was the magnitude of the largest recorded earthquake in 1960 in Chile?

• 9.5

• 10.0

• 9.0

• 8.5

What natural disaster was primarily responsible for the majority of fatalities during the 1960 Chile earthquake?

• Volcanic eruption

• Flood

• Tsunami

• Landslide

Which earthquake in the Americas was the deadliest, occurring in 1970?

• Lima, Peru

• Valdivia, Chile

• Chimbote, Peru

• San Juan, Argentina

What caused the massive landslide during the 1970 Chimbote earthquake?

• Tsunami

• Earthquake-induced landslide

• Flood

• Volcanic eruption

In which region did the 1944 earthquake, the deadliest in Argentine history, occur?

• Cordoba

• San Juan

• Buenos Aires

• Mendoza

What is a key factor in preventing fatalities in seismically active regions?

• Building taller structures

• Earthquake and tsunami education

• Ignoring seismic warnings

• Relying solely on technology

What is the primary cause of earthquakes within the continental crust in the Sierras Pampeanas region?

• Volcanic activity

• Compressive forces from plate interactions

• Tsunami waves

• Meteor impacts