We can’t see the dust plume from the ground. But it’s serious enough to close down airspace across the airspace of northern Europe. Thousands of aircraft are grounded. Hundreds of thousands of travellers are stranded.

The volcanic dust plume has been caused up a volcanic eruption in Iceland. Volcanic eruption is caused by unstable forces going on deep underground.

All we see is the result – and we have to deal with the consequences.

What’s going on underground that you can’t yet see?