Pyroclastic flow

Everest. Then blazing hot ash, and other debris, that got to temperatures upwards of 1300 degrees Fahrenheit, was thrown down the mountain at speeds of about 70 miles per hour. This phase lasted about one day. the next day there were pyroclastic flows, or lava flows, that came out of the mountain engulfing and smothering everything in their way. Two of them engulfed Pompeii. During the second phase, Pliny the Younger says in his letter “Broad sheets of flame were lighting up many parts of…

Explosivity Index, or VEI, was developed by Chris Newhall and Stephen Self in 1982. It allows scientists to compare the severity of volcanic eruptions from today as well as millions of years ago. Factors involved in this scale is the volume of pyroclastic material released by the volcano, the height of the eruption column, and how long the eruption lasts. The VEI ranks from 0 to 8, with 8 being the most severe of the eruptions. The eruption of Tambora ranked a 7 on the scale, meaning it was…

Mount St. Helens By Kyle Lockhead Volcanoes destroy and volcanoes create. The catastrophic eruption of Mount St. Helens on May 18, 1980 was devastating. It shows the destructive power of a volcano. Yet, over a time span longer than human memory. Volcanoes have played a key role in forming and modifying the planet we live on. More than 80 percent of the Earth's surface is from a volcano and the eruption from Mt St. Helens is big part in the environment but the mountain of Mt St. Helens will never…

climate. The one natural disaster that can be in almost all climates is a volcano. Volcanoes can be in places as cold as Iceland or in places warm like the Pacific islands. Volcanoes are also very hazardous, causing things such as ash fall or pyroclastic flows which can be deadly. Volcanoes don’t just cause death and destruction but can also cause environmental issues. Volcanoes can cause countless problems for the world. Particulates released by volcanoes reflect sunlight that can cause…

There are many geological hazards that could affect the Portland Metro area in the near future, but the three most devastating would be Earthquake, Volcano Eruption, and a landslide. There has been numerous rumor about the “big earthquake” that is long over due for the PNW. The earthquake is estimated to be a nine magnitude, which means it’s going to cause a lot of damage to Portland and could even make Portland disappear. An earthquake is generally formed when the underground suddenly breaks…

On September 27, 2014 Japan’s Mount Ontake erupted catching everyone by surprise, including over 250 hikers at the resorts and shrines on the peak. In contrast recently everyone around the globe was able to track the eruption by Iceland’s Bardarbunga due to a web of advanced technology, allowing them to even track where the magma was underground. Japan has a very similar array but was unable to predict Ontake’s eruption. This is due to the fact that it was what is called a phreatic eruption, or…

properties of a supergroup as described by Pitcher. The country rocks surrounding the plutons are at least mid-Paleozoic in age. Liberty Hill lies within country rocks of the Carolina Slate belt which consists of “primarily intermediate to felsic pyroclastic debris and hypabyssal intrusive bodies.” (Speer et al. 1980). The isotopic ages of metamorphism from the granitoids suggest that the oldest activity occurred in the northwest while the latest activity took place in the eastern portions…

In this film, the eruption of the once dormant Mount Vesuvius in 79 C.E. is discussed. It is a volcano that is right between two tectonic plates, so when an earthquake shook it, it finally exploded. The eruption was one that was 1000 times more powerful than the bomb we dropped on Hiroshima. The town of Pompeii was located just below the volcano, and did not stand a chance against its wrath. At the end of Vesuvius’s eruption, Pompeii was covered in sixteen feet of ash. About sixteen centuries…

Dalton M. Stone Hannah GEOS 120 16 APR 18 Volcanoes: The Veins of Planetary Life Part One: Volcanoes are essential to function and formation of our planet. Each one, dormant or active, is able to give insight as to the creation of the world around us. With many volcanoes spanning the area known as the ring of fire, we are able to obtain information and research in a central location in the sense of a planetary scale. While volcanoes are all over the earth, if we look at a few examples, we can…

The small earthquakes indicating magma flow. In late March, a phreatic eruption took place. A phreatic eruption is an explosion of steam caused by magma heating groundwater. Many more earthquakes with magnitudes as high as 5.1 on the Richter scale continued. By the end of April, the side of…