What are continuous gravimeters?

A continuous gravimeter is like a super-sensitive scale that never stops measuring, it tells us how heavy things are, even if we can’t see them.

Imagine you're playing with your favorite toy on a bouncy castle. When the castle goes up and down, your toy feels lighter or heavier, even though nothing changed about the toy itself. A continuous gravimeter works in a similar way, but instead of feeling the bounce of a castle, it feels changes in gravity, like when something underground moves or shifts.

Think of Earth as a giant ball with lots of layers inside. Sometimes, these layers move, like when you shift your weight on a seesaw. A continuous gravimeter measures those tiny changes in weight all the time, helping scientists know what's going on deep inside the Earth.

It’s like having a scale that never stops working, even while you're sleeping or playing outside, it keeps track of everything, just like your toy feels the bounce of the castle.