Description

Learn about active volcanoes and their eruptions. Also learn about researches in predicting accurate future behaviors of volcanoes.

Transcript

Studying the Behavior of Volcanoes Volcanic eruptions can send plumes of ash and smoke high into the stratosphere and cause devastation to the surrounding country. Some eruptions have killed thousands and displaced many more. Yet people continue to live near active volcanoes because the ash and lava enriches the soil. With some volcanoes remain in dormant for centuries or millennia, the danger becomes remote. But when a big volcano wakes up, it can have global consequences. Volcanoes occur along the boundaries of the earth’s tectonic plates or help spots above upward currents or plumes in the earth segmental. On July 18, 1995, The Monserrat volcano is the soft area hills became active for the first time in 350 years. Its affect were devastating on the Caribbean islands economy and experts warned it could erupt again at any time. Thousands of islanders abandoned homes, farms, or hotels at the foot of the volcano. The capital Plymouth was buried about waves of gas and ash. Two years later, another blast of super heated lava killed 19 people in area that had been declared unsafe. This used to be a lush valley, 25 meters deep. Now, it is a level sea of mud at the start of an exclusion zone. According to experts, there’s no immediate end in sight. The lava dome is building steadily. Every few months, part of the dome will collapse, generating fast moving flows of super heated gas and rock known as Pyroclastic Flows. In Africa, in a democratic republic of Congo, when the Mount Miriam Congo erupted in 2005, hundreds died, and schools, hospitals, thousands of homes are destroyed. With their town down in ruins, hundreds of thousands of people fled to take refuge in the boarder town of Kazanya in neighboring Rowanda. Six months later, some businesses had reacted and residents were trying to shovel away the lava to rebuild their houses. Researchers are trying to gain better understanding of volcanoes to attempt more accurate predictions about their behavior. The composition of molten lava and where it comes from has been the center of debate among scientists for some year. They are trying to find out more about the earth’s internal dynamics and how it works. Geophysicist now have good evidence that plumes, perhaps narrow crams that dwell up in the layers between the earth’s crust and core, originate at the coo of mental boundary. They suggest there is one bigger convicted system like a pot of a soup continuously boiling. Mounts in Helland is the most active volcano in America. It lies at the center of a specially created pot called the National Volcanic Monument. It’s an area of great natural beauty but it is closed intermittently when the volcano shows signs of activity. In 2006, the pack reopened after rumblings that caused it to stay closed for almost two years. Hikers on the five out climb the crater’s rim, passed census monitoring the mountain’s many earthquakes. They have to cross bone of field from past eruptions and areas thick with ash. Frequent tremors caused rock slides and the far as service advises caution, saying that there was always a degree of danger on active volcanoes. 2591 meters high, mounts in Helland is a challenge that many serious hikers would like to undertake. And today, we‘d seen its strength. But in May 1980, mounts in Helland erupted with such force that it leveled surrounding forests and killed 57 people. The north face of the mountain collapsed in a massive explosion. Nearly 600 square kilometers of forest was flattened or buried beneath volcanic ash. And a volcanic cloud rose thousands of meters into the sky. The eruption continued for nine hours that mounts in Helland and their surrounding landscape were dramatically changed within moments. Two years later, the region was declared a special area for recreation and research, and the environment was left to recover naturally.