Glacial earthquake

Imagine a really big block of ice - so big that it's as tall as some of the tallest buildings you've ever seen. This block of ice is called a glacier, and it's so heavy that it weighs millions and millions of pounds.

Now, imagine that this glacier is slowly moving down a mountain, almost like a big slow-motion avalanche. As it moves, it starts to create a lot of pressure on the ground under it. The pressure from the glacier can be so strong that it actually causes the ground to shake and rumble, like a mini earthquake!

This shaking and rumbling caused by a glacier is called a glacial earthquake. It's not as strong as a regular earthquake, but it can still be felt by people nearby. Scientists use special tools to measure the strength of glacial earthquakes and study them to learn more about glaciers and how they move.