In San Francisco, California, the San Andreas Fault maintains a major role in most of the earthquakes that happen there. The San Andreas Fault was formed by causes on and under the earth. This event had a lot of effects on the earth and many effects on the people on the earth that live close to this fault.
To begin with, two of the plates that meet in Western California, and the boundary between those plates is the San Andreas Fault. The San Andreas Fault was formed in San Francisco California because the Pacific Plate ( on the West ) moves North West to the North American Plate ( on the East ) causing all of these earthquakes to happen and the San Andreas Fault to form. In fact, there are other places on the earth that you can expect similar events to the San Andreas Fault. One place that you can expect similar events to the San Andreas Fault is the Fault Line called “ The Median Tectonic Line.” This fault line is in Japan. In fact, this fault line is Japan's longest fault system. One more place that you can expect similar events to the San Andreas Fault is in the “North Anatolian Fault.” This fault line is in Turkey. The North Anatolian Fault reaches 1500 kilometers in length. Now onto how did the San Andreas Fault destroy and change Earth’s crust. The San Andreas Fault destroyed 500 blocks of San Francisco. 500 blocks is ¼ of San Francisco. The San Andreas Fault has changed the Earth’s crust by forming a 10 mile trench within the earth's crust. Also, this trench extends 800 miles in length to make it one of the 11 longest fault lines.
Now onto what was the effect on the earth's surface by the San Andreas Fault and what kinds of rock were found inside of the San Andreas Fault line. There were many effects that the San Andreas Fault had on the Earth’s surface. One effect that it had was the destruction of 28,000 buildings during the 1906 San Andreas Fault earthquake. In addition to many buildings being destroyed, there were many fires that occurred in San Francisco because of the 1906 San Andreas Fault earthquake. All of the fires that occurred were also part of the reason that so many of those buildings were destroyed. The many earthquakes that have occurred in the San Andreas fault have caused much damage every time. Actually, the San Andreas fault has had an earthquake not only once or twice, it has had an earthquake five times. There was only one main rock that was found inside the San Andreas Fault line. This rock has a 4 inch diameter rock core. This rock weighs roughly one ton per rock.
Not to any surprise, but when all of the earthquakes were happening in San Andreas Fault it was affecting the people that live there and the surrounding communities also. These earthquakes have killed more than 3,000 people and left 225,000 out of the 400,000 people that live there homeless. Even though earthquakes can happen out of nowhere, there are research labs that can predict when the next earthquake can happen on the San Andreas fault. They use graphs to help predict how far away the earthquake is going to be, and where the earthquake is going to take place.In addition, people are already starting to prepare for when the next earthquake is going to take place. They already have emergency shelters and neighborhood support centers for the people that are either homeless or don't think that they can survive the earthquake in their own house.