FC: Mt. Saint Helen's By Joey Root Morgan Binder
1: Mt. saint Helens is on a fault line in Washington that is hitting an ocean ridge. The volcano was formed by the two tectonic plates converging. Mt St. Helens is a young volcano compared to other major volcano. Mt St. Helens was formed only 37600 years ago. Mt St. Helens as shaken up from the earthquake measuring 5.1 on the richter scale the north side of this mountain fell into a huge rock debris avalanche.
2: needed weather conditions: the weather conditions are not needed for a volcanic eruption. The weather for a volcanic eruption is not a variable, it is all based on recent activity of the | volcano. If it has recently been having small earthquakes around the volcano, there is a possibility that there will be a soon to happen. eruption.
3: Places in danger: houses below the volcano from the immediate eruption. Mt saint Helens produced allot of ash so near cities were covered in it. the ash was so heavy that near cities couldn't see in daylight, mid afternoon seemed like midnight. | The unannounced darkness caused trouble driving home for daytime workers. people that were in cities with ash were in danger of breathing it in, the ash had contained sulfur dioxide from the volcano and it was quite harmful. Nearly 230 square miles of forest was blown down or buried beneath volcanic deposits. The eruption lasted 9 hours but Mt Saint Helens and surrounding landscape were changed within moments.
4: Since MT.SaintHelens was placed right in Washington it was the biggest hit. The ash was the biggest affect but, the houses trees animals and people living below or near the volcano were the most deeply affected. the death toll was 57,( it most likely wouldve been greater if loggers were working on that day)
5: in 1982, the president and congress created the 110,00 acre national volcanic monument. inside the monument the nature is left to respond naturally.
6: advances in seismograph technology have increased our understanding of earthquakes, and the earth itself. Todays high-technology, digital seismographs record ground shaking over a large band of frequencies and seismic amplitudes. Todays seismometers are called broadband because they are able to sense frequencies over a large band of frequencies, from thousand of seconds to less than a hundredth of a second. The prediction of volcanic eruptions is difficult because,to be of practical use, the must be made before eruptions. Its a lot easier to see patterns in monitoring data after an eruption has occurred. But great progress has been made because of the lessons learned over many years at Kilauea volcano in Hawaii, and applied and modified at Mt. Saint Helen's before and during an eruption sequence in the 1980s, prediction requires careful monitoring of a volcanoes vital signs. seismometers can be used to pinpoint earthquakes which track the rise of magma and its movement along fissures. At some volcanoes the seismic info seems most reliable, at others the tilt tells the story.
7: Volcano prediction technology
8: in 1973 citizens of Iceland poured cold water into flowing lava to slow it down, an act that helped save a fishing port in there village. in Sicily on Mt. Etna engineers have blasted holes in the hard crusted covering to create a lava flow using explosives. the lava then flows out through the holes instead of towards the villages in its original path. now although the Mt. Saint Helen's blast was more sudden and didn't contain much lava these are some prevention strategies to use in the future is the volcano ever begins to show signs of eruption again. Cost: the Government wanted to spend 140 million dollars on "volcano watching" but this did not pass after much debate. This monitoring aimed for geologist understanding the inner workings of volcanoes as well as providing impending eruptions, in the U.S. and in active areas around the world where U.S. military bases are located.