Record your answer from Lab Exercise #1, Step 1, Question 2. What time in hours:minutes:seconds GMT did the S waves arrive?…
4. The right portion of Figure 1 describes general characteristics of the ocean bottom in coastal areas that are tectonically passive (not near a plate boundary). The left portion of the figure generalizes tectonically active coastal areas. Tectonically active regions, typically associated with convergent plate boundaries, experience relatively frequent earthquakes and/or volcanic activity. You examined the locations of plate boundaries in Investigation 2A. Convergent plate boundaries are more closely associated with the [(west)(east)] coasts of the Americas.…
You have two attempts to complete this lab assignment. The average score of your two attempts…
7. A high number of earthquakes occur along plate boundaries because plates moving together or apart normally cause them.…
This a map showing the distribution of earthquakes from 1990 to 1996. A similar map is on page 54 in your text.…
The reason for this is because of the buckling and stress from the movement of the tectonic plates. The epicenter of the earthquake was 60 meters below the ocean floor about 100 miles off the coast of Chile. Valdivia and Puerto Montt suffered significant damages based on how nearby they were to the center of a massive quake (extreme). The earthquake was a megathrust earthquake which is caused by the release of mechanical stress between the subducting Nazca Plate and the South American Plate which is on the Peru-Chile…
Los Angeles was built on a myriad of transform faults that include Santa Monica fault, the San Fernando fault, and Northridge/Santa Barbara fault. Even though these faults are not as well-known as the San Andreas Fault, where it margins are between the Pacific and North American plates that cross Southern California. Los Angeles is sitting near at least 60 known faults. The earth still moves frequently in these smaller less known areas. One example of this is the earthquake that was focused in the Northridge area happened in January 1994. It only lasted 30 seconds registering at 6.7 on the Richter scale but the aftershocks lasted for several days afterwards. Ground displacement is the second hazard main of earthquakes. Especially if there is a building or roadway on or near the fault line. This quake alone killed 60 people, and injuring thousands. It also caused fires and an explosion in the Granada Hills area, causing many buildings and freeways to collapse. There were also many homes left without power or water.…
California sits along the San Andreas Fault and there is more than just this one that has been named. Many earthquakes are produced by motions along the fault, but the movement isn 't the only reason for an earthquake. There has to be appoint of focus this is the place where the movement starts first and above this point is the epicenter. The epicenter…
Earthquakes develop in the crust of the earth. The inner parts contains a lot of energy. Some of this energy can escape through cracks which can cause volcanic activity, but most of it is stored within the earth’s inner part, contained in the crust.The earth’s outer crust has rough edges and lines making it look a bit like a jigsaw puzzle.The energy stored here causes the pieces to slide, glide, knock and move around each piece. These pieces are also known as tectonic plates.…
There are also secondary effects that can be a disastrous to Los Angeles like faulting and ground ruptures, aftershocks, and fires. Earthquakes originate from the sudden movement of faults. As the faults move, in any direction, the blocks of rock on both sides of the fault will rub against each other and that cause the vibrations. The more the faults move, the larger the amount and intensity of vibrations in the earthquake will be. The reason that Los Angeles is prone to an earthquake at any given time is because the center of the city is located directly above a group of thrust faults. These faults occur at convergent boundaries. It is also located closely the fault known as the San Andreas Fault, which has produced some of the largest earthquakes the world has ever seen. Thrust faults can give way to immense pressure, which will cause one slab of rock to push against another slab of rock and ultimately it will push the other plate upward. Earthquakes have devastated Los Angeles in the past. The largest quake in modern history was the Fort Tejon Earthquake in 1857. It measured 8.0 on the Richter scale. Southern California was scarcely populated, so…
Some of the most severe earthquakes in the United States occurred not on the Pacific Coast but in the middle of the continent in southeastern Missouri near the town of New Madrid. There are many things that were unusual about the New Madrid earthquakes of 1811-1812. The location is a surprise, the damage was catastrophic but we did learn from it.…
Iowa doesn’t get many earthquakes, but San Francisco does. There has been lots of earthquakes around that area, some too small to feel, and some too big to not. All around the southern part of the east-cost, earthquakes riddle the area. Just like how tornados are very common to us.…
An instrument for automatically detecting and recording the intensity, direction, and duration of a movement of the ground, especially of an earthquake.…
vast majority of these earthquakes are too small to be felt by humans. The larger ones,…
Due to Japan being located in a region where many continental plates intersect, Japan experiences several earthquakes. Most parts of Japan also experience tidal waves. One of the worst earthquakes to take place in Japan is known as the “Great Kanto Earthquake”, this hit the Kanto plain (near Tokyo) in 1923 and over 100,000 people were killed during this incident!…