IMPORTANT TO KNOW: Yellowstone Volcano Earthquake Swarm Inside Upper Magma Chamber! Yellowstone Earthquake Swarm, 'Ring of Fire' Quake-Cluster Prompts Warning
East of Reykjavik, Iceland lies the mountain, Hengill. Hengill was formed from a Palagomite tuff, it is a central volcano and has a giant magma chamber beneath it. When thick basalt lava flows cool, they form hexagonal cracks, called columnar joints. These can be found also in Ireland & Scotland.
Scientists Discover Huge Magma Reservoir beneath Kilauea Volcano Jan 2014 by Natali Anderson An anomalous magma chamber has been observed at km depth beneath the upper east rift zone of one of the world’s most active volcanoes – Kilauea, Hawaii.