Steven Anderson: Volcanic eruption explained

Volcanic eruption explained

In February of 1942, Mexican farmer Dionisio Pulido thought he heard thunder coming from his cornfield. However, the sound wasn't coming from the sky. The source was a large, smoking crack emitting gas and ejecting rocks, and would come to be known as the volcano Paricutin. Where do new volcanoes like this come from, and what triggers their unpredictable eruption? Steven Anderson investigates. [Directed by Cabong Studios, narrated by Addison Anderson, music by Astrolábio Studio / Julio Muzzi].

A quiet cornfield in Mexico turned into a dramatic eruption in 1942, birthing the volcano Paricutin and covering over 200 square kilometers in ash. Volcanoes form and erupt when the balance between underground magma, the weight of Earth’s crust, and the crust’s strength is upset. Gas bubbles in magma, landslides that lower pressure, and weakened rock layers can all trigger powerful explosions. Despite advances in technology, predicting exactly when eruptions will occur remains a major scientific challenge.