GEOLOGY

Detailed explanation-1: -Stratovolcanoes are more likely to produce explosive eruptions due to gas building up in the viscous magma. Andesite (named after the Andes Mountains), is perhaps the most common rock type of stratovolcanoes, but stratovolcanoes also erupt a wide range of different rocks in different tectonic settings.

Detailed explanation-2: -Composite volcanoes are built up by successive eruptions of domes, lava flows and pyroclastic flows, but also can experience large blasts that destroy large areas of their summits, such as the May 1980 explosion and landslide at Mount St. Helens.

Detailed explanation-3: -There isn’t much in Kamchatka, a remote peninsula in northeastern Russia just across the Bering Sea from Alaska, besides an impressive population of brown bears and the most explosive volcano in the world. Kamchatka’s Shiveluch volcano has had more than 40 violent eruptions over the last 10, 000 years.

Detailed explanation-4: -Shield volcano eruptions are less explosive than composite volcanoes. Cinder cone volcanoes are steep, cone-shaped volcanoes built from lava fragments called ‘cinders.

Detailed explanation-5: -Mount Tambora, Indonesia (1815)-VEI-7. Krakatoa, Indonesia (1883)-VEI-6. Mount Vesuvius, Italy (79 A.D.)-VEI-5. Mount Pinatubo, Philippines (1991)-VEI-6. Yellowstone, U.S. (640, 000-plus years ago)-VEI-8. 01-Dec-2022