Tsunamis happen when the plates on the crust of the earth move, therefore moving the entire plate so that the water rises and is pushed forward, therefore causing a tsunami (Drohan, 2009, p.21). These tectonic plates are everywhere, under everything from the biggest mountain to the smallest hill. Though it is infrequent, volcanoes have been known to cause tsunamis. It happens when to volcano begins to erupt, but instead of coming out from the top of the volcano a lateral blast shoots out from the side. Next, a quickly moving avalanche of lava pours into the water near it causing the wave to travel to distant coastlines (Springer, 2005).
Some of these movements will be below the ocean, which will automatically force out an enormous amount of seawater. All that water will shoot up and then come crashing down, with one side charging towards the west and the other towards the east. Within 15 minutes of the earthquake, that 700-mile liquid wall will hit the Northwest coast. It is predicted that the combination of the earthquake and the tsunami, will result in 13,000 people killed and the Pacific Northwest totally wiped out and destroyed. Not only is it terrifying that the odds of this big hit are one in ten, but also the fact that people are not even preparing for this natural disaster.
Being close to the shoreline at a subduction zone can be very dangerous if a megathrust occurs. A famous example would be the 2011 tsunami in Japan which resulted in a 9.0 magnitude earthquake. The tsunami waves rose to a height of 3 to 38 meters and hit on Honshu’s coastline causing many casualties and devastating damages to the vicinity (Sorkhabi, 2011). Knowing that the subduction zone can creates megathrust to cause tsunamis, people have adopted preventive measures to reduce death toll. Educating civilians about the warning signs before the arrival of a tsunami wave such as waves retreating rapidly from coastline and vibrations of the ground is important.
Due to stress they shift and cause the earthquake. that zone is more subject to seismic disasters. Tectonic, volcanic, collapse and explosion, are the four different types of earthquakes. A tectonic earthquake is one that occurs when the earth 's crust breaks due to geological forces on rocks and adjoining plates that cause physical and chemical changes. A volcanic earthquake is when a volcano erupts and shakes the plates.
They have the same impact like secondary hazard. They are tsunamis, secondary hazard, that causes after the earthquake, tsunami had killed a lot of people and destroy area around there. The effect for Valdivia earthquake are too big so they’re traveled across to the Pacific Ocean and traveled along to the southern Chile, Hawaii, Philippine, Japan and etc, with the speed are over than 200 miles per hour. While the effect for Alaska is also big, that why this incident which is caused tsunami and massive landslides are also affect a lot in Canada to Hawaii.
During this stage, the volcano erupts small amounts of lava very infrequently, often several million years apart. Eventually, erosion breaks the volcano back down to sea level where it becomes an atoll (coral atoll stage). Because atolls are the growth of coral and marine organisms, when the Pacific Plate carries the atoll to waters too cold for these organisms to survive, they erode away into seamounts and
“This quake was so big”(Los Angeles Times 2). “The most important conclusion is not to panic”(Scientific American 2). In July 1958, Lituya Bay, Alaska was hit by three Geo processes. These were a massive earthquake, a harrowing rockslide, and a devastating tsunami. In 1980, Mt.
The earthquake happened because of the movement from the San Andreas Fault (u-s-history.com) .This little movement from the tectonic caused big things such as earthquake, but what exactly is San Andreas Fault? San Andreas fault is major fracture of the Earth’s crust in extreme western north America (Brittanica). San Andreas fault have caused so many earthquakes in U.S.A, causing many destruction, and causing lost of lifes. Now, What made Northridge Earthquake so destructive? While the Northridge earthquake was happening Californian people couldn’t predict it (u-s-history.com).
A subduction in the Earth’s crust is basically one of the plates is sinking under another plate. This causes a major disruption in the water leading to tsunamis we see today. Technology allows us to find the origin of the tsunami and which plates are moving below the ocean. It also allows us to figure out the total duration of the tsunami and raise in water level. When a ship goes down in the middle of the ocean suddenly there are two interpretations
Over one thousand otter carcasses were found and an estimated two thousand eight hundred died from the spill. As a direct result of the spill, roughly three hundred harbour seals died. The oil spill later on caused a collapse of the Pacific Herrings’ population because nearly half of their eggs laid in 1989 were exposed to the oil (Liszka 1-30). These deadly outcomes changed their environment