Megatsunami

What did the tree ring study in Latuya Bay, Alaska show?

A violent force had hit the trees at some point in the past

What cities in the video are particularly vulnerable to megatsunamis?

Boston, New York, Miami

What kind of rock(s) is found inside a volcano?

Both a and b -Permeable rock and rubble that allows rain to soak into it -Vertical dikes that act as dams trapping rain water in the heart of the volcano

How was the cause of the tree line discovered?

By eyewitness accounts of another tsunami

How is a seismic tsunami generated?

By the up and down motion of rocks during earthquakes offsetting the water

What are two lines of evidence for a megatsunami hitting the Bahamas?

Huge waves reshape some of the islands, blasting the chevron shaped ridges. The waves also ripped vast boulders from off the ocean floor and dropped them on land.

Why are landslide-generated tsunamis a greater threat?

Seismic tsunamis offset the water upwards which means they are limited in height, landslide tsunamis offset the water all the way to the bottom so their height is limited only by the depth of the ocean, which, can be thousands of meters

Why is this so (your answer from question six is used here)?

The way they formed

What were they testing in Zurich, Switzerland?

They were testing landslides that generate megatsunamis, they physically model a landslide's impact into water

What areas are most prone to landslide tsunamis?

Volcanic islands

Can water trapped between the dikes, becoming heated and expanded, cause the flanks of the volcano to collapse?

Yes