What do and don't we know about megathrust earthquakes?

The video tutorial explains the nature of megathrust earthquakes, which occur at subduction zones where one tectonic plate dives beneath another. These earthquakes are among the largest globally, releasing over 60% of the total seismic energy since 1964. They typically occur along ocean shorelines but can also happen on land, such as in Nepal. Understanding when and where these earthquakes will occur is crucial for forecasting. The video also explores why some earthquakes generate tsunamis while others do not, emphasizing the importance of understanding fault materials and earthquake physics.

What is a subduction zone?

How much of the total energy released by earthquakes is accounted for by megathrust earthquakes?

Where do megathrust earthquakes most commonly occur?

What factors do scientists need to know to forecast megathrust earthquakes?

Why is it important to understand why some megathrust earthquakes produce tsunamis while others do not?