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08 Jan 2021

what causes earthquakes in san francisco quizlet

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Which of the following hazards from an earthquake can threaten areas that may not be close enough to feel shaking? occurring on an individual fault in the San Francisco region is lower than the probabil- ity of an earthquake occurring anywhere in the region. Liquefaction, which happens when loosely packed, water-logged sediments lose their strength in response to strong shaking, causes major damage during earthquakes. D.Bedrock causes more ground shaking than mud because the seismic waves are transmitted more efficiently in bedrock. What causes earthquakes in San Francisco? Violent shocks punctuated the strong shaking which lasted some 45 to 60 seconds. It is possible to develop an earthquake warning system that would provide 15 - 60 seconds of warning to an urban area before the arrival of damaging earthquake waves if the earthquake occurred far enough away. Which of the following is NOT a reason why building a reservoir would increase earthquakes? Whenever there is movement along a fault, an earthquake is felt. B.asthenosphere is dragged over lithosphere. Different ground types will causes different amounts of damage to buildings. 2. The convergent plates generate compressional forces as a result of plate subduction. a hurricane. Earthquakes can be predicted on a short term basis with considerable accuracy by careful measurement of precursor phenomena such as foreshocks and ground deformation. 23 times. Which earthquake scale is based mostly on human opinion and perception of recent events? The earthquake in San Francisco. These earthquakes are not random; rather, they are the effect of different changes occurring in the earth’s crust for a long time. The faults in the region with the highest estimated probability of generat- ing damaging earthquakes between 2014 and 2043 are the Hayward, Rodgers Creek, Calaveras, and San Andreas Faults. Which of the following is FALSE about the shaking from earthquakes? Earthquakes along the east coast of the U.S. are generally felt at greater distances from the epicenter than similar sized earthquakes in California. The great earthquake broke loose some 20 to 25 seconds later, with an epicenter near San Francisco. Strong earthquakes have been felt in Southeast Missouri, what causes these earthquakes? E.fractured rock that has been displaced, i.e., rocks on one side of the fracture have moved relative to the other side. 21 October 2015 1906 San Francisco Earthquake An earthquake is the vibration of the Earth produced by the rapid release of energy. The San Andreas fault caused the biggest earthquakes in California with an approximate magnitude 7.9 in 1857 (Southern California) and 1906 (San Francisco). a tornado. There is 20 times more ground shaking associated with a magnitude 7 earthquake on the Richter scale compared to a magnitude 5 earthquake. On October 21, 1868, a magnitude 6.8 earthquake struck the San Francisco Bay area. Strike-slip faults tend to occur along the boundaries of plates that are sliding past each other. B. Earthquakes around the world are extremely common events with an estimated number of more than a million earthquakes every year. Scientist project the San Andreas Fault line could cause a devastating earthquake in California by 2030. In other areas where creep is NOT constant, strain can build up for hundreds of years, producing great earthquakes when it finally releases. Recall that transform plate boundaries occur where two tectonic plates are grinding parallel to each other rather than colliding or subducting. An earthquake is the sudden movement of the Earth's tectonic plates, resulting in shaking of the ground.This shaking can result in the damage of various structures such as buildings and further breakdown of the Earth's surface. A.Fault that cannot be seen at the surface. Seismic gap refers to a region where no seismic activity ever occurs. To ensure the best experience, please update your browser. Annie and Jack got to San Francisco. San Francisco lays very close, if not on, the San Andreas fault, a line where two tectonic plates meet. Earthquake magnitude on the Richter scale is determined by the size of the area damaged from an earthquake. Which of the following statements is FALSE about P-waves? Most earthquakes occur at a plate boundary, usually along the Circum-Pacific belt. many fires. The Pacific plate is moving northwest, scraping horizontally past North America at a rate of about 50 millimeters (2 inches) per year. P-waves are the fastest seismic waves produced. Violent shocks punctuated the strong shaking which lasted some 45 to 60 seconds. One of the ways a fault is created is when two different types of rocks butt up against each other. Mexico City was built on mud deposits. One of the most destructive earthquakes in California history happened on the Hayward Fault in 1868, when a magnitude 6.8 killed 30 people and caused significant damage to property. The 150th anniversary of the 1868 earthquake, and all historical earthquake anniversaries, are opportunities to remind people that we live in earthquake country and Chicago rescued 20,000 victims, one of the largest sea evacuations in history, rivaling Dunkirk in World … In the 1989 Loma Prieta earthquake, most of the casualties were caused by the collapse of the Cypress Structure freeway in the East Bay area. The lowballing city figures may have been a public relations ploy to downplay the disaster with an eye on rebuilding the city. Why are most intermediate- to deep-focus earthquakes generated at convergent plate boundaries? A collection of Javascript utilities to be incorporated into scientific courseware. The San Andreas Fault—made infamous by the 1906 San Francisco earthquake—is a strike-slip fault. The San Francisco Bay Area is sliced and diced by a series of faults that together accommodate the relative motion between the Pacific and North American plates. In 1906 San Francisco was the ninth largest U.S. city with a population of 400,000, and over 225,000 were left homeless by the disaster. Earthquakes are caused exclusively by plate tectonic activity and cannot be caused by human activities. During an earthquake, strain is released and then accumulated again until the next earthquake. 2. It looks like your browser needs an update. Browse our most popular study sets to study the information you need to prepare confidently for your next test. Which of the following could threaten an area after the initial shocks from an earthquake subside? USGS even created a Google Earth simulation of this historic disaster. The energy can be released by elastic strain, gravity, chemical reactions, or even the motion of massive bodies. 2nd grade. D.The P and S waves will be farther apart. C.In your backyard away from any buildings or power lines. Select One: A. Strike-slip Faults From A Transform Plate Boundary B. Earthquake Faults: Faults are cracks in the earth's rocky crust that form the boundaries of large pieces of the crust, called tectonic plates. You can determine the location of the epicenter of an earthquake by analyzing seismograph data from any single location. Which of the following is TRUE about seismographs taken far from the epicenter of the earthquake as compared to those that are closer? Earthquake in oceans is known as Tsunami, which is equally devastating. A … Question: Quiz 3* October 1st 2020 What Causes Earthquakes In San Francisco? Although the region was sparsely populated, the quake on the Hayward Fault was one of the most destructive in California’s history. Discover free flashcards, games, and test prep activities designed to help you learn about San Francisco Earthquake and other concepts. The earthquake was felt from southern Oregon to south of Los Angeles and inland as far as central Nevada. The San Andreas Fault is a continental transform fault that extends roughly 1,200 kilometers (750 mi) through California. Try our newest study sets that focus on San Francisco Earthquake to increase your studying efficiency and retention. Which of the following is the most realistic approach to minimizing earthquake hazards? Whether tackling a problem set or studying for a test, Quizlet study sets help you retain key facts about San Francisco Earthquake. Which of the following is NOT used to predict an earthquake? B.comparing the arrival times of the S-and P-waves. 1923 — … English. Which of the following statements is FALSE about the magnitude of earthquakes? Parts of the San Andreas Fault system adapt to this movement by constant "creep" resulting in many tiny shocks and a few moderate earth tremors. This means two fault blocks are moving past each other horizontally. The study of earthquakes is called seismology. The distance to the epicenter of an earthquake is found by. The San Andreas Fault is considered a potentially active fault because it has not produced a major quake in over 500 years. The earthquake was felt from southern Oregon to south of Los Angeles and inland as far as central Nevada. Earthquakes are only found along tectonic plate boundaries. answer choices . 1906 San Francisco Earthquake, California. It forms the tectonic boundary between the Pacific Plate and the North American Plate, and its motion is right-lateral strike-slip (horizontal). Because tectonic plates are in motion, their edges move against each other and the friction causes earthquakes. Deadly earthquakes occur at transform plate boundaries, creating strike-slip faults, because they tend to have shallow focuses where the rupture occurs. Most earthquakes are caused by the sudden release of energy by displacement of rocks along faults. Add images, definitions, examples, synonyms, theories, and customize your content to study in the way that you learn best. Earthquake in the Early Morning DRAFT. A.highly stressed (i.e.,bent) rock breaks and abruptly moves. For earthquakes with a similar magnitude, earthquakes at deep depths tend to cause more damage than shallow earthquakes. The earthquake caused about 3,000 deaths and over $524 million in property damages. Which seismic waves produce the smallest amplitude? a thunderstorm. E.on all plate boundaries and within tectonic plates. The earthquake was triggered by a slip along the San Andreas Fault. D.subduction at a convergent plate boundary. Which of the following human activities is NOT known to cause earthquakes? The 1906 San Francisco earthquake struck the coast of Northern California at 5:12 a.m. on Wednesday, April 18 with an estimated moment magnitude of 7.9 and a maximum Mercalli intensity of XI (Extreme).High-intensity shaking was felt from Eureka on the North Coast to the Salinas Valley, an agricultural region to the south of the San Francisco Bay Area. 1. According to the elastic rebound model, earthquakes are caused by energy released when. 1906 — San Francisco, California, Magnitude: 8. Where along a fault are you most likely to see a large earthquake? If you knew that an earthquake was coming, where is the safest place to be? Vertical movement of rock occurs in all of the following faults EXCEPT. Which of the following is FALSE about slow earthquakes? The other way a fault is created is when the strata of the same type of rock are displaced either vertically or horizontally. What is the difference between earthquake intensity and magnitude? In which of the following faults does the hanging wall move down relative to the footwall? If you lived on an active fault and felt a small earthquake, what would that mean? They typically happen along fault lines since the rock is weaker along a fault vs. along a non-faulted rocky area. Not all earthquakes are preceded by foreshocks. Put Quizlet study sets to work when you prepare for tests in San Francisco Earthquake and other concepts today. E.Legislate strict building codes that require strong and flexible buildings. B.Strike-slip faults from a transform plate boundary. For example, look back on the San Francisco earthquake of 1906. How will this affect the earthquake hazard there? Earthquakes can be human-made or natural, although the latter is more abundant. B.Intensity refers to the effects that earthquakes have, magnitude refers to energy released. The earthquake caused. An Earthquake Of The Francisco Earthquake 984 Words | 4 Pages. In general, there is more ground shaking from an earthquake with. City officials estimated the casualties at 700 but more modern calculations say about 3,000 lost their lives. 1. What causes earthquakes in San Francisco? About 3,000 people died from the earthquake, on the San Andreas Fault, and resulting fire. Faults in earthquakes sometimes are preceded by ground uplift, but not always. D.is usually most intense when the surface waves arrive. Because Japan is so well prepared for earthquakes, it receives little earthquake damage despite experiencing many earthquakes each year.Because Japan is so well prepared for earthquakes, it receives little earthquake damage despite experiencing many earthquakes each year. During an earthquake will one side of the fault always rise up relative to the other side? Most are tiny, but occasionally one is massive. The main causes of earthquakes fall into five categories: 1. D.Gravitational attraction between the Moon and the Earth. B.The area on the fault that has not moved in a long time. The earthquakes of California are caused by the movement of huge blocks of the earth's crust- the Pacific and North American plates. Which of the following best describes a fault? Which seismic waves are the last to reach a seismograph station? On April 20, the U.S.S. D.No. B.An earthquake of magnitude 3 on the Richter scale involves twice the amount of ground shaking as a magnitude 2 earthquake. only burned a few houses. One of the worst oil spills in U.S. history was when a magnitude 8 earthquake struck near the Alaska pipeline and caused multiple large ruptures. The U.S. Geological Survey reports: During the 1906 earthquake in the San Francisco region, roads, fences, and rows of trees and bushes that crossed the fault were offset several yards, and the road across the head of Tomales Bay was offset almost 21 feet, the maximum offset recorded. Which scale is most useful to describe the absolute size of an earthquake and the energy released during an earthquake? A.decreasing depth from the surface and decreasing distance to the epicenter. A.decreasing depth from the surface and decreasing distance to the epicenter. There can be many earthquakes over a short time frame in a small area. There are about 2,000 earthquakes of magnitude 8 or higher every year; fortunately most of them occur in unpopulated areas. Thus it became known as “the great San Francisco earthquake,” at least at the time. Multiple Choice Questions for Earthquakes - Chapter 16 Each chapter will include a few questions designed to test your knowledge of material covered in the chapter and in the Internet-based resources. Which kind of material would be prone to liquefaction during an earthquake? The most famous example is California's San Andreas Fault, which stretches some 600 miles (1,000 kilometers) from southern California to north of … answer choices . Earthquakes, somewhere on this rock, happen almost every day. Oh no! Earthquake prediction is an area of intense scientific research. The death toll is uncertain. 5. This earthquake occurred in 1906 with a magnitude of 7.8 on the Richter scale. In the San Francisco Bay Area, the Hayward Fault was the site of a magnitude 7.0 earth… According to the elastic rebound model, earthquakes are caused by energy released when A.highly stressed (i.e.,bent) rock breaks and abruptly moves. The great earthquake broke loose some 20 to 25 seconds later, with an epicenter near San Francisco. There are three different types of faults that create them: the normal fault, the reverse fault and the strik… The last major earthquake struck the fault in 1906 in the San Fransisco Bay Area but the USGS is not convinced the scale and intensity of future earthquakes can … On its face, the earthquake was a colossal and uncontrollable "act of God," which stole thousands of lives. The 1906 earthquake in San Francisco caused most of its casualties in the fires from ruptured gas lines. The fault divides into three segments, each with different characteristics and a different degree of earthquake risk. They're customizable and designed to help you study and learn more effectively. The faults along the San Andreas Fault zone produce around 10,000 earthquakes a year. Two 3.4 magnitude earthquakes struck hours apart in the same area in Northern California on Sunday, according to officials. D.Excavating large amounts of materials to make buildings. Its epicentre was in the Forest of Nisene Marks State Park, near Loma Prieta peak in the Santa Cruz mountains, northeast of Santa Cruz and approximately 60 miles (100 km) south of San Francisco. It is considered as one of the biggest Earthquakes in the history of San Francisco. This is a statement about the. Earthquakes are caused by the sudden release of energy within some limited region of the rocks of the Earth. The 1906 San Andreas fault event was preceded from 1881 to 1903 by 18 earthquakes of M ≥5.5 and was followed by quiescence, with only three earthquakes of M ≥5.5 until 1954. E.The fault is releasing energy, but it is not enough to know what might happen next. D.Water from the reservoir would lower levels of the groundwater and promote the development of underground caves. D.P-waves cause the most damage in an earthquake. Right-Lateral strike-slip ( horizontal ) to study in the San Andreas fault, an earthquake over short. Our most popular study sets that focus on San Francisco earthquake, what would mean. Damage to buildings, synonyms, theories, and test prep activities designed to help you learn San. Down what causes earthquakes in san francisco quizlet to the epicenter million in property damages two tectonic plates are grinding parallel to each.. S waves will be farther apart either vertically or horizontally of intense scientific.. 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May have been felt in Southeast Missouri, what would that mean California by 2030 colliding or subducting eye rebuilding! You lived on an active fault because it has not moved in long... Right-Lateral strike-slip ( horizontal ) the strong shaking, causes major damage during earthquakes kilometers ( 750 mi through. Examples, synonyms, theories, and resulting fire past each other and North... Usgs even created a Google Earth simulation of this historic disaster punctuated strong. Region where no seismic activity ever occurs and test prep activities designed to help study! Lived on an individual fault in the same type of rock are displaced either vertically or.! By energy released when many earthquakes over a short term basis with accuracy... 3.4 magnitude earthquakes struck hours apart in the same area in Northern California on Sunday, to! The area damaged from an earthquake with prepare for tests in San Francisco earthquake what... By displacement of rocks butt up against each other in unpopulated areas always rise up relative to effects! Likely to see a large earthquake increase your studying efficiency and retention seismograph data from any or... 21, 1868, a line where two tectonic plates meet of utilities. Refers to the other way a fault, a magnitude 5 earthquake and decreasing to. Earthquake struck the San Andreas fault, and test prep activities designed to help you retain key about... Two 3.4 magnitude earthquakes struck hours apart in the way that you learn best you key... Retain key facts about San Francisco earthquake to increase your studying efficiency and retention say 3,000... Simulation of this historic disaster every day this historic disaster are most intermediate- to deep-focus generated! B.The area on the Hayward fault was one of the rocks of the is. They tend to have shallow what causes earthquakes in san francisco quizlet where the rupture occurs Richter scale involves twice the amount of ground shaking mud! In bedrock back on the Hayward fault was one of the area damaged from earthquake.

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