Claudia Martin has worked in book publishing for 17 years. She is the author of several books and websites for children and young people. Her favourite subjects are history, current affairs and technology.

• 1: On the move1: What is an earthquake?1: Measuring earthquakes1: Tsunamis1: Earthquake safety1: What makes a volcano?1: Volcano shapes1: Eruptions1: Supervolcanoes1: Active or extinct?1: Hot springs and geysers1: Living with volcanoes1: Quick quiz answers1: Now test your knowledge!1: Glossary1: Further reading1: Index

Claudia Martin has worked in book publishing for 17 years. She is the author of several books and websites for children and young people. Her favourite subjects are history, current affairs and technology.

• 1: On the move1: What is an earthquake?1: Measuring earthquakes1: Tsunamis1: Earthquake safety1: What makes a volcano?1: Volcano shapes1: Eruptions1: Supervolcanoes1: Active or extinct?1: Hot springs and geysers1: Living with volcanoes1: Quick quiz answers1: Now test your knowledge!1: Glossary1: Further reading1: Index

Claudia Martin has worked in book publishing for 17 years. She is the author of several books and websites for children and young people. Her favourite subjects are history, current affairs and technology.

• 1: On the move1: What is an earthquake?1: Measuring earthquakes1: Tsunamis1: Earthquake safety1: What makes a volcano?1: Volcano shapes1: Eruptions1: Supervolcanoes1: Active or extinct?1: Hot springs and geysers1: Living with volcanoes1: Quick quiz answers1: Now test your knowledge!1: Glossary1: Further reading1: Index