Volcanic eruptions can result in additional threats to health, such as floods, mudslides, power outages, drinking water contamination, and wildfires. Villarrica, one of Chile's most active volcanoes, looks a little different after a violent eruption on March 3, 2015. If magma is thin and runny, gases can escape easily from it. Many scientists believe that 80% of the Earth’s volcanic eruptions actually take place underwater (in the ocean). Before the 1815 eruption, Mount Tambora was 14,000 feet (4.3 kilometers) tall and was reduced down to 9,000 feet (2.7 kilometers) after the eruption. People should know that before a volcano erupts there are warning signs such as rumbling sounds, continuous… Note that there may be many other eruptions that have not been identified, and estimates for the size of eruptions can be subject to considerable uncertainties. The deadliest and biggest volcanic eruption in recorded history was the eruption of Mt.Tambora which … Lava Creek Eruption (Yellowstone Caldera) Volcano Explosivity Index (VEI): 8 A caldera is a very large crater that forms after a very large Early phase. Volcanic eruptions happen with early warnings unlike earthquakes that are sudden. A good example is the eruptions at Hawaii’s volcanoes. This is a list of volcanic eruptions of the 20th century measuring a Volcanic Explosivity Index (VEI) of at least 4, as well as notable smaller eruptions. There are early warning signs before a volcano erupts so there is at least time for residents around the volcano to prepare before the actual eruption occurs. When this type of magma erupts, it flows out of the volcano. The explosivity of an eruption depends on the composition of the magma. There are early warning signs before a volcano erupts so there is at least time for residents around the volcano to prepare before the actual eruption occurs. If strong enough, underwater volcanoes can cause tsunamis. A large eruption occurred at Pinatubo on June 12, sending up a cloudy plume that reached an altitude of nearly 12 miles (19 km). Some volcanic eruptions are explosive and others are not. https://news.yale.edu/2013/09/11/volcano-erupts-violently-warning-signs Volcanic eruptions happen with early warnings unlike earthquakes that are sudden. In the years before the 1883 eruption, seismic activity around the Krakatoa volcano was intense, with earthquakes felt as far away as Australia. Health concerns after a volcanic eruption include infectious disease, respiratory illness, burns, injuries from falls, and vehicle accidents related to the slippery, hazy conditions caused by ash.

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