Explore the eruption of Axial Seamount, on the Juan de Fuca Ridge (a mid-ocean r
ID: 117007 • Letter: E
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Explore the eruption of Axial Seamount, on the Juan de Fuca Ridge (a mid-ocean ridge) off the west coast of Oregon by going to the following links where scientists blogged about an exploration to the area in 2013. Read the blog entries and watch the videos. htul andiolukspo.com|2013/08/where axial seamoue.htmy hop axial 201 http://axial 2013.blogspot.com/2013/09/2011-lava-flows.html 13.blogspot.com/2013/08/axial- caldera.html 17) Fill out the information below based on the information in the blogs, and what you might expect would be hazardous to humans. a) Earthquake characteristics (number, size, depth): b) Volcanism characteristics (erupted products, distance affected): c) Hazards to humans: Next, look at GPS data from an eruption along the mid-Atlantic ridge where it is exposed in Iceland. Use the data in gps times series_eyeafyallayoku.v5.pptx 18) What were the indications that the volcano was "waking up" and entering a phase of eruptive activity? erupt? was "waking up" and the time it actually erupted? 19) What were the indications that the volcano was not only "waking up" but actually about to 20) How much warning time was there between the time of the first indications that the volcanoExplanation / Answer
17)
a) An earthquake is sudden ground movement. This movement is caused by the sudden release of the energy stored in rocks .The point where the rock ruptures is the earthquake’s focus. The focus is below the Earth’s surface. A shallow earthquake has a focus less than 70 kilometers (45 miles). An intermediate-focus earthquake has a focus between 70 and 300 kilometers (45 to 200 miles). A deep-focus earthquake is greater than 300 kilometers (200 miles). About 75% of earthquakes have a focus in the top 10 to 15 kilometers (6 to 9 miles) of the crust. The higher the magnitude of an earthquake the less frequent it’s occurrence. The largest ever recorded was in Valvidia in Chile in 1960 and recorded 9.5 on the scale
b) A volcano is a vent from which the material from a magma chamber escapes. This may include lava, rock fragments, ash, and gases.Lava flows are almost always too slow to run over people, but they can certainly run over houses, roads, and any other structures.The longest recent flow in Hawai'i was erupted from Mauna Loa in 1859. It is about 51 kilometers long from the vent to the ocean.There is a lava flow at Undara in Queensland, Australia is 100 miles (160 km) long.
c) The hazard caused by nature will be tsunami,cyclone etc but the man made hazards are lot more worst than these
From the following Earthquake is said to be the hazard to humans as we all know that earthquake dosn't kill people but the structures built by humans are affected by the earthquake which inturn affects the humans
18) Before the volcanic eruption the first being to know is the animals The animals will start running away from forest and into the villages or town near to it. A small earthquake below the volcano will happen slight inflation, or swelling, of the volcano and increased emission of heat and gas from vents on the volcano
19) Hundreds of small earthquakes are caused as magma rises up through cracks in the Earth's crust . Temperature around the surrounding area increases and the heating above the vents increases with more gases flowing out
20) The time depends on the type of volcanic eruption but it usaully takes 2-3 hrs min or even 1 day it all depends on the volcanic energy and when a volcano takes place then the next predicted volcanic eruption will happen after 10 years
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