A volcano is an opening in the earth’s surface, which allows hot lava, volcanic ash, and other gases to escape through the crust of the earth. Volcanoes cause a lot of damage in many different places, for instance in Pompeii where Mount Vesuvius erupted. Mount Vesuvius is considered to be one of the most dangerous volcanoes in the world because in A.D. 79 it destroyed the whole city of Pompeii and killed about two thousand people. Pompeii was a town in the Roman Empire, located on the western coast of Italy. Many wealthy Romans had big homes there.
It destroyed 75% of itself along with many other people living near the coastlines of Australia and India. In 1988, Krakatoa erupted in February, then continued on March 16th on which was reported caused two small lava flows from its new crater, then continued into April, causing frequent explosions to eject small plumes of fire. The last eruption we'll talk about was in 1992. This explosion’s strongest activity point occurred on November 12, when Krakatoa started “shooting” lava-bombs out of its crater onto the north coast and some lava flowed into the sea. While we know volcanoes erupt, how do they erupt?
They stretched from the southern tip of South America, along the coast of North America, across the Bering Straight, down through Japan and into New Zealand. What some people did not know is that The Ring of Fire actually has two other names to go along with it. One is called “Circum-Pacific Belt”, and the second is “Pacific Ring of Fire.” Some of the biggest volcanic eruptions has happened along The Ring of Fire. It also, contains some of the largest volcanoes and mountains in the world. One example is Mount Saint Helens.
Geologist kept measuring the bulge, recording the earthquakes and sampling the ash and gases. By May, the bulge was 300 feet wide and more than one mile in length. On May 18 at 8:32 in the morning, Mount St.. Helens erupted taking the top 1,200 feet off the volcan... ... middle of paper ... ...composite volcano because it erupts both lava and ash. Dormant and Extinct Volcanoes If a volcano shows no signs of life for thousands of years it is thought to be extinct. If a volcano shows activity, even slight movement, it is dormant.
Introduction: Mount Vesuvius is one of history’s most recognizable Volcanoes, as each of its eruptions have gone down as a significant event in geologic history. The events that transpired during and after these eruptions have shaped the way scientists and people view the sheer power that these volcanoes possessed. This report will take a look at Vesuvius’ most prolific eruption in 79 AD. The geologic setting of the mountain, precursor activity, and the impact the eruption had on the surrounding populations and towns will all be detailed. Along with these details, this report will also look at the further history of Vesuvius’s explosive past by detailing its eruption cycle.
Volcanoes are made up of different layers of the earth. Many things can occur after a bad eruption. There are 3 main things that can happen. They are Hot Springs, Calderas and Mud spots.Hot Springs occur when magma beneath the surface heats up the water in the cracks overlying rocks. Calderas happen when a massive blast of lava empties a volcano's magma chamber and causes the volcano to collapse on itself.
Three years prior to the April 1815 years the volcano began to rumble and generate a dark cloud around the summit. Then in the early evening of April 5th 1815 there was a moderate-sized eruption. The detonations sounded like the discharge of cannons and could be heard as far away as Ternate, 1400km away (Stothers, 1984). A man by the name of Sir Stamford Raffles heard these sounds wrote: “The first explosions were heard on this Island in the evening of 5 April, they were noticed in every quarter, and continued at intervals until the following day. The noise was, in the first instance, almost universally attribut... ... middle of paper ... ...no.cfm?vnum=0604-04= Stothers, R. (1984, June 15).
Vesuvius where people would flock to the area in 79 AD to be near the Bay of Naples. Little did they know that the volcano would erupt into the most destructive volcano in history. Mt. Vesuvius has erupted about three dozen times and was the most disastrous due to the large population around the area. The volcano, which is still active today, is a stratovolcano.
￼￼￼￼￼By about 30,000 years ago, Mount Mazama began to generate increasingly explosive eruptions that were followed by thick flows of silica-rich lava, an outward sign of the slow accumulation of a large v... ... middle of paper ... ...west edge of the central platform formed lava tubes or channels that sent lava far out onto the caldera floor. Later eruptions from a vent in the northern part of the caldera, just south of present-day Cleetwood Cove, built Merriam Cone. The erupting Merriam Cone probably never reached the lake surface. The ever-deepening lake eventually drowned the central platform volcano as well. Only Wizard Island managed to grow high enough to stay above the waterline.
Mt. St. Helens is famously for its eruption on May 18, 1980, although the mountain had previous eruptions with four different stages and the stages often had similarities including the devastating one in 1980; in addition, the 1980 eruption presented serious havoc that led to a long road of recovery. The first stage known as the Ape Canyon Stage and according to the U.S. Geological survey it was ignited from series of small eruptions that created the birth of the mountain; during this phase these eruptions possibly formed domes and pyroclastic flows. Mt. St. Helens in the Cougar stage formulated lava domes and flows just like the Ape Canyon stage including eruptions that escalated enormous volumes of ash along with pyroclastic flows; furthermore