Let's look back at over 10,000 years of volcanic eruptions. This animated map groups eruptions using the Volcanic Explosivity Index (VEI) with indices from 0 to 8. Learn more here: http://ow.ly/RYFo50wtV70 | Esri

VOLCANIC EXPLOSIVITY INDEX 🌋 The Volcanic Explosivity Index, or VEI, is a scale that measures the size and intensity of volcanic eruptions. It was developed by Chris Newhall and Stephen Self in 1982 as a way to compare eruptions based on the volume of material ejected, the height of the eruption column, and other observable features. The scale ranges from 0 to 8. Each level represents a tenfold increase in eruption size. For example, a VEI 5 eruption is ten times more explosive than a VEI 4. He

MOUNT PINATUBO ERUPTION IN 1991 Mount Pinatubo is an active stratovolcano in the Zambales Mountains, located on the tripoint boundary of the Philippine provinces of Zambales, Tarlac and Pampanga, all in Central Luzon on the northern island of Luzon. Its eruptive history was unknown to most before the pre-eruption volcanic activities of 1991, just before June. Pinatubo was heavily eroded, inconspicuous and obscured from view. It was covered with dense forests which supported a population of sever

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