Geophysicists use sound waves to build a picture of the magma and rock beneath this active volcano, most of which is underwater. It’s like CT scanning the Earth.
Volcanic ash is made of tiny crystal and rock fragments that during an eruption can reach as high as the cruising altitude of commercial aircraft, and that’s a concern for airlines.
A maar is a volcanic crater, often filled with water. New research highlights the similarities between oral stories around the world that shed light on the formation of these craters.
Melbourne lies at the eastern end of a volcanic province, but when’s it going to blow? Understanding the geology of Melbourne and comparing it to Hawaii is really helpful in calculating risk.
A tectonic earthquake doesn’t always trigger eruptions of nearby volcanoes. If an eruption happens, the volcano must already have been in a critical condition.
Compared to Earth, more “oomph” is required to bring magma to the surface of Mars, and this is probably why we haven’t seen any recent eruptions on the red planet.
When magma rises towards the surface gas bubbles start to form. Whether or not they can escape as the magma is rising affects how explosive the eruption will be.
Walter E. Little, University at Albany, State University of New York
Guatemala has ended its Fuego volcano rescue mission and declared 110 dead. But people in the hot, ash-covered eruption zone say that the real death tally is much higher and that they’ll keep digging.