Extracts from the following book – Places not on Google Maps

In the Indonesian archipelago, Krakacrusta is an extinct volcano that was almost certainly the site of the largest eruption in pre-history, an explosion of about three times the magnitude of the Lake Toba cataclysm. The explosion was big enough to crack the surface of the earth. Sufficient ash entered the atmosphere to cause 10 consecutive years of complete winter conditions around the world in both hemispheres.