- Crust - cool, lightweight, brittle, which floats on top of mantle. It is the outer layer of earth. Tectonic processes reshape continents and also cause earthquakes - Tectonic plates- plates caused by convection currents in the mantle that causes earthquakes. - Ocean basins form where continents crack and pull apart. - Magma – is molten rock
The asthenosphere is making convection currents. Since the convection currents are always moving it causes the asthenosphere to move and bend because it is ductile. When the asthenosphere moves which is under the tectonic plates it will cause an earthquake or more specifically the Alaskan Way
The more atoms that are in a certain amount of space the more dense it would be. This means the closer and more compact the atoms are in a space the more dense it is. The two layers of the Earth we focus on most for earthquakes is the asthenosphere and the lithosphere. The convection currents are in the asthenosphere and the tectonic plates and what the lithosphere is made up of they both are involved in earthquakes.
Although the San Francisco Earthquake of 1906 and the Great Chicago Fire of 1871 were both horrific events that created huge destruction on the United States, they took a big toll in people’s lives in many different ways and encouraged them to take charge and rebuild back their hometowns that they loved. The San Francisco Earthquake commenced at five thirteen o’clock in the morning, with the epicenter offshore of San Francisco. The city carried more than 400,000 people during this event (Earthquake of 1906, 1). Most of the citizens who were present during the earthquake were all in bed asleep, but the early morning risers were able to witness the start of everything (The Great 1906, 5).
How do earthquakes form? Earth quakes form when two earth blocks slide past each other. When they slip past each other it is called a fault. Earth quakes
D., & Gibbs, J. F. (1976). Effects of local geological conditions in the San Francisco Bay region on ground motions and the intensities of the 1906 earthquake. Bulletin of the Seismological Society of America, 66(2), 467-500. Shostak, N. C. (2009). Intensity of the 18 April 1906 earthquake in and near San José, California.
Juneau is in a very unique situation. The city faces multiple geologic processes that could be dangerous. These processes can be very hazardous. Some of the hazards the city faces avalanches, earthquakes, heavy snow, landslides, and tsunamis. Although the city faces regular avalanches and the possibility of landslides the town’s major hazard is earthquakes.
The earth is like a jigsaw puzzle, it moves in someway or another all of the time. The tectonic plates that form the surface of the Earth are often sliding against each other, which triggers earthquakes. The 1960 Chile Earthquake was the largest earthquake ever recorded which had a tremendous impact not only on the immediate area and the people living there, but also on the rest of the world. The 1960 was the largest earthquake ever recorded.
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).
Effects of the 1906 San Francisco Earthquake Could you imagine if you lost everything you have ever worked for your whole life? After the 1906 San Francisco earthquake struck, many people lost everything they had. Over 3,000 people were left dead with a crashing economy, a city full of complete devastation, and years that it would take to try and rebuild the city. Even though the later effects of the earthquake brought people together, the immediate effects broke families apart. The reason is because so many people lost family members and friends.
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.
The 1906 Earthquake On Wednesday, April 18, 1906, at 5:12 a.m., a 7.8- magnitude earthquake awakened the city of San Francisco. The earthquake lasted for sixty-five terrifying seconds of violent shaking and ended with an unknown number of dead family members, neighbors, as well as hundreds of thousands of people trapped in a city surrounded by water. To make matters worse, a series of fires broke out throughout the city. For three days, persistent, raging fires challenged the possibility of a coherent emergency response. By the end of the week, almost 98 percent of San Francisco's city structures in the most populated 521 blocks lay in ruins.
According to John Claque, the motion is curling the edge of the North America plate upwards, much the same way a rug would buckle if you pushed on one edge. This creates a major strain on the fault line until eventually, the north America plate "elastically bounces back", causing the mega thrust and creating the tsunami".
These two plates push and shove each other causing small tremors throughout which can cause landslides,volcanic eruptions and once in a couple years, quakes with devastating results. The strongest earthquake recorded occurred in 1991 with a measure of 7.6 on the Richter scale. This earthquake left 4 dead and buildings as well as bridges and road were completely destroyed. If another Earthquake occurs, the coastal cities would be the most affected ones as they are closer to the plates.
The Tohoku Earthquake was the most powerful earthquake recorded to have hit Japan. The earthquake was a magnitude 9.0 off the coasts of Japan that occurred at 2:46pm on Friday 11 March 2011, which triggered a powerful tsunami that reached the height up to 10.4 meters. A Japanese National Police Agency reported 15,889 deaths, 6,152 injured, and 2,601 people missing, 127,290 buildings totally collapse, 272,788 buildings half collapse, and another 747,989 buildings partially damaged. The Tohoku earthquake and tsunami caused severe structural damage in northeastern Japan, including heavy damage to roads, railways and dams, not to mention fires in many areas. It was the toughest and the most difficult crisis in Japan after the World War 2 leaving
