An inconspicuous hill on the Spanish Island of La Palma bursts open, releasing an avalanche of lava.

Mount Nyiragongo in the Democratic Republic of Congo erupts and engulfs the nearby city of Goma.

Chris visits Mount Etna, Europe's most active volcano, during a period of eruption.

Chris Horsley helps predict the path of a volcano in Iceland that has just been born.

Chris Horsley is called back to the Congo to investigate a threat to over two million people.

Chris journeys to Iceland to install vital early-warning systems on the glacier-covered Katla.