Faults in earthquakes sometimes are preceded by ground uplift, but not always. If you lived on an active fault and felt a small earthquake, what would that mean? B.Intensity refers to the effects that earthquakes have, magnitude refers to energy released. Select One: A. Strike-slip Faults From A Transform Plate Boundary B. 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. Violent shocks punctuated the strong shaking which lasted some 45 to 60 seconds. 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. This is a statement about the. During an earthquake, strain is released and then accumulated again until the next earthquake. Chicago rescued 20,000 victims, one of the largest sea evacuations in history, rivaling Dunkirk in World … On October 21, 1868, a magnitude 6.8 earthquake struck the San Francisco Bay area. If you knew that an earthquake was coming, where is the safest place to be? It forms the tectonic boundary between the Pacific Plate and the North American Plate, and its motion is right-lateral strike-slip (horizontal). The San Andreas fault caused the biggest earthquakes in California with an approximate magnitude 7.9 in 1857 (Southern California) and 1906 (San Francisco). 21 October 2015 1906 San Francisco Earthquake An earthquake is the vibration of the Earth produced by the rapid release of energy. 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. They typically happen along fault lines since the rock is weaker along a fault vs. along a non-faulted rocky area. Earthquakes are caused by the sudden release of energy within some limited region of the rocks of the Earth. The death toll is uncertain. The earthquake was triggered by a slip along the San Andreas Fault. Earthquake in oceans is known as Tsunami, which is equally devastating. For earthquakes with a similar magnitude, earthquakes at deep depths tend to cause more damage than shallow earthquakes. 2. answer choices . Which seismic waves produce the smallest amplitude? Earthquakes can be predicted on a short term basis with considerable accuracy by careful measurement of precursor phenomena such as foreshocks and ground deformation. Browse our most popular study sets to study the information you need to prepare confidently for your next test. 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. 2nd grade. A.decreasing depth from the surface and decreasing distance to the epicenter. Not all earthquakes are preceded by foreshocks. The distance to the epicenter of an earthquake is found by. D.The P and S waves will be farther apart. Which of the following statements is FALSE about the magnitude of earthquakes? The earthquake was felt from southern Oregon to south of Los Angeles and inland as far as central Nevada. Because tectonic plates are in motion, their edges move against each other and the friction causes earthquakes. For example, look back on the San Francisco earthquake of 1906. Whenever there is movement along a fault, an earthquake is felt. D.Gravitational attraction between the Moon and the Earth. Liquefaction, which happens when loosely packed, water-logged sediments lose their strength in response to strong shaking, causes major damage during earthquakes. Deadly earthquakes occur at transform plate boundaries, creating strike-slip faults, because they tend to have shallow focuses where the rupture occurs. 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. The great earthquake broke loose some 20 to 25 seconds later, with an epicenter near San Francisco. 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. The energy can be released by elastic strain, gravity, chemical reactions, or even the motion of massive bodies. B.An earthquake of magnitude 3 on the Richter scale involves twice the amount of ground shaking as a magnitude 2 earthquake. English. The 1906 earthquake in San Francisco caused most of its casualties in the fires from ruptured gas lines. It looks like your browser needs an update. D.Bedrock causes more ground shaking than mud because the seismic waves are transmitted more efficiently in bedrock. Try our newest study sets that focus on San Francisco Earthquake to increase your studying efficiency and retention. Annie and Jack got to San Francisco. The other way a fault is created is when the strata of the same type of rock are displaced either vertically or horizontally. In which of the following faults does the hanging wall move down relative to the footwall? Which of the following is NOT used to predict an earthquake? According to the elastic rebound model, earthquakes are caused by energy released when. The San Andreas Fault is a continental transform fault that extends roughly 1,200 kilometers (750 mi) through California. 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 fault divides into three segments, each with different characteristics and a different degree of earthquake risk. E.on all plate boundaries and within tectonic plates. Two 3.4 magnitude earthquakes struck hours apart in the same area in Northern California on Sunday, according to officials. You can determine the location of the epicenter of an earthquake by analyzing seismograph data from any single location. Earthquakes, somewhere on this rock, happen almost every day. Most are tiny, but occasionally one is massive. There can be many earthquakes over a short time frame in a small area. Earthquakes are only found along tectonic plate boundaries. Seismic gap refers to a region where no seismic activity ever occurs. a thunderstorm. Thus it became known as “the great San Francisco earthquake,” at least at the time. occurring on an individual fault in the San Francisco region is lower than the probabil- ity of an earthquake occurring anywhere in the region. The study of earthquakes is called seismology. 5. One of the ways a fault is created is when two different types of rocks butt up against each other. B.asthenosphere is dragged over lithosphere. 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. Most earthquakes occur at a plate boundary, usually along the Circum-Pacific belt. The great earthquake broke loose some 20 to 25 seconds later, with an epicenter near San Francisco. Recall that transform plate boundaries occur where two tectonic plates are grinding parallel to each other rather than colliding or subducting. USGS even created a Google Earth simulation of this historic disaster. Which earthquake scale is based mostly on human opinion and perception of recent events? B. D.P-waves cause the most damage in an earthquake. What is the difference between earthquake intensity and magnitude? 1906 — San Francisco, California, Magnitude: 8. This earthquake occurred in 1906 with a magnitude of 7.8 on the Richter scale. Where along a fault are you most likely to see a large earthquake? Which kind of material would be prone to liquefaction during an earthquake? B.The area on the fault that has not moved in a long time. answer choices . The lowballing city figures may have been a public relations ploy to downplay the disaster with an eye on rebuilding the city. E.Legislate strict building codes that require strong and flexible buildings. What causes earthquakes in San Francisco? only burned a few houses. Scientist project the San Andreas Fault line could cause a devastating earthquake in California by 2030. In general, there is more ground shaking from an earthquake with. A.highly stressed (i.e.,bent) rock breaks and abruptly moves. a tornado. The faults along the San Andreas Fault zone produce around 10,000 earthquakes a year. B.Strike-slip faults from a transform plate boundary. Put Quizlet study sets to work when you prepare for tests in San Francisco Earthquake and other concepts today. The earthquake was felt from southern Oregon to south of Los Angeles and inland as far as central Nevada. Oh no! City officials estimated the casualties at 700 but more modern calculations say about 3,000 lost their lives. a hurricane. The earthquake caused about 3,000 deaths and over $524 million in property damages. A … Whether tackling a problem set or studying for a test, Quizlet study sets help you retain key facts about San Francisco Earthquake. Vertical movement of rock occurs in all of the following faults EXCEPT. 23 times. Which of the following is NOT a reason why building a reservoir would increase 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. Which seismic waves are the last to reach a seismograph station? The earthquake caused. The San Andreas Fault—made infamous by the 1906 San Francisco earthquake—is a strike-slip fault. Earthquake Faults: Faults are cracks in the earth's rocky crust that form the boundaries of large pieces of the crust, called tectonic plates. How will this affect the earthquake hazard there? Which of the following could threaten an area after the initial shocks from an earthquake subside? A.Fault that cannot be seen at the surface. D.Water from the reservoir would lower levels of the groundwater and promote the development of underground caves. Which of the following is TRUE about seismographs taken far from the epicenter of the earthquake as compared to those that are closer? According to the elastic rebound model, earthquakes are caused by energy released when A.highly stressed (i.e.,bent) rock breaks and abruptly moves. There are about 2,000 earthquakes of magnitude 8 or higher every year; fortunately most of them occur in unpopulated areas. There are three different types of faults that create them: the normal fault, the reverse fault and the strik… 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. To ensure the best experience, please update your browser. Earthquakes can be human-made or natural, although the latter is more abundant. In other areas where creep is NOT constant, strain can build up for hundreds of years, producing great earthquakes when it finally releases. 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 … Earthquakes around the world are extremely common events with an estimated number of more than a million earthquakes every year. 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. Which of the following human activities is NOT known to cause earthquakes? It is considered as one of the biggest Earthquakes in the history of San Francisco. On April 20, the U.S.S. Earthquake prediction is an area of intense scientific research. Which of the following best describes a fault? Strike-slip faults tend to occur along the boundaries of plates that are sliding past each other. P-waves are the fastest seismic waves produced. The most famous example is California's San Andreas Fault, which stretches some 600 miles (1,000 kilometers) from southern California to north of … The San Andreas Fault is considered a potentially active fault because it has not produced a major quake in over 500 years. They're customizable and designed to help you study and learn more effectively. Discover free flashcards, games, and test prep activities designed to help you learn about San Francisco Earthquake and other concepts. 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. The convergent plates generate compressional forces as a result of plate subduction. Question: Quiz 3* October 1st 2020 What Causes Earthquakes In San Francisco? Most earthquakes are caused by the sudden release of energy by displacement of rocks along faults. Which scale is most useful to describe the absolute size of an earthquake and the energy released during an earthquake? The Pacific plate is moving northwest, scraping horizontally past North America at a rate of about 50 millimeters (2 inches) per year. The 150th anniversary of the 1868 earthquake, and all historical earthquake anniversaries, are opportunities to remind people that we live in earthquake country and 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 hazards from an earthquake can threaten areas that may not be close enough to feel shaking? E.The fault is releasing energy, but it is not enough to know what might happen next. Although the region was sparsely populated, the quake on the Hayward Fault was one of the most destructive in California’s history. 1. San Francisco lays very close, if not on, the San Andreas fault, a line where two tectonic plates meet. There is 20 times more ground shaking associated with a magnitude 7 earthquake on the Richter scale compared to a magnitude 5 earthquake. Earthquake in the Early Morning DRAFT. 2. Earthquakes are caused exclusively by plate tectonic activity and cannot be caused by human activities. In the San Francisco Bay Area, the Hayward Fault was the site of a magnitude 7.0 earth… Mexico City was built on mud deposits. 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. many fires. Violent shocks punctuated the strong shaking which lasted some 45 to 60 seconds. E.fractured rock that has been displaced, i.e., rocks on one side of the fracture have moved relative to the other side. Which of the following statements is FALSE about P-waves? 1. Strong earthquakes have been felt in Southeast Missouri, what causes these earthquakes? D.No. About 3,000 people died from the earthquake, on the San Andreas Fault, and resulting fire. Why are most intermediate- to deep-focus earthquakes generated at convergent plate boundaries? D.Excavating large amounts of materials to make buildings. Which of the following is FALSE about the shaking from earthquakes? Different ground types will causes different amounts of damage to buildings. During an earthquake will one side of the fault always rise up relative to the other side? The main causes of earthquakes fall into five categories: 1. On its face, the earthquake was a colossal and uncontrollable "act of God," which stole thousands of lives. An Earthquake Of The Francisco Earthquake 984 Words | 4 Pages. 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