which statement describes earthquakes?

a) the Parkfield Earthquake study (4 points), b) what was learned about earthquake prediction from the 2004 Parkfield earthquake (3 points), c) the difference between earthquake prediction and earthquake forecasting (3 points), d) the key pieces of information that are part of an earthquake forecast. Rock can bend and break. It develops in the lithosphere. Which phrase describes a feature of an earthquake's epicenter? Faults extend from a few centimetres to many hundreds of kilometres. Magnitude is a measure of the amplitude (height) of the seismic waves an earthquakes source produces as recorded by seismographs. waves. How can an earthquake have a negative depth; that would mean its in the air. stress, Which word identifies the agent that carries the energy released from earthquakes? To accomplish this goal, products and services provided by the National Geospatial Program (NGP) and Land Remote Sensing (LRS) Program serve as a geos, Earthquakes are one of the most costly natural hazards faced by the Nation, posing a significant risk to 75 million Americans in 39 States. Encyclopaedia Britannica's editors oversee subject areas in which they have extensive knowledge, whether from years of experience gained by working on that content or via study for an advanced degree. It develops in the lithosphere. - This scale measures the magnitude of an earthquake based on the size of seismic waves. How does the duration affect the magnitude? They begin at the epicenter. Scientists can accurately predict the time and location of about 50% of all earthquakes.C. How do you determine the magnitude for an earthquake that occurred prior to the creation of the magnitude scale? P waves, meaning primary waves, travel fastest and thus arrive first at seismic stations. Select the two correct answers. Depending on their intensity, earthquakes (specifically, the degree to which they cause the grounds surface to shake) can topple buildings and bridges, rupture gas pipelines and other infrastructure, and trigger landslides, tsunamis, and volcanoes. Scientists can accurately predict the time and location of almost all earthquakes.B. That vibration pushes the adjoining piece of ground and causes it to vibrate, and thus the energy travels out from the earthquake hypocenter in a wave Earthquake size, as measured by the Richter Scale is a well known, but not well understood, concept. When this energy is released suddenly, for example by shearing movements along faults in the crust of the Earth, an Unfortunately, Earth is not transparent and we can't just see or photograph the earthquake disturbance like meteorologists can photograph clouds. Each is valid for a particular frequency range and type of seismic signal. They are caused by reduced stress in rocks. Because at many places the Circum-Pacific Belt is associated with volcanic activity, it has been popularly dubbed the Pacific Ring of Fire.. If Earth were a perfect sphere, calculations of depth and distances would be easy because we know the equations for those calculations on a sphere. How can an earthquake have a negative depth; that would mean its in the air. Get a Britannica Premium subscription and gain access to exclusive content. Since modern seismographs can detect seismic waves even smaller than those originally chosen for zero magnitude, it is possible to measure earthquakes having negative magnitudes on the Richter scale. fault They only vibrate at Earth's surface. They write new content and verify and edit content received from contributors. and fat. Q: QUESTION 6 For the remaining questions, refer to the case study for additional . They range from very simple and inexpensive to sophisticated and pricey. In California, the collapse of buildings, roads and infrastructure produced eight of the ten costliest earthquakes in the last one hundred years. The links here are to various sources with information on how to build a seismometer. The duration of an earthquake is related to its magnitude but not in a perfectly strict sense. Present-day seismographs, however, may be calibrated to compute Richter magnitudes, and modern methods for measuring earthquake magnitude have been developed to produce results that remain consistent with those measured using the Richter scale. This magnitude scale was referred to as ML, with For earthquakes that occurred between about 1890 (when modern seismographs came into use) and 1935 when Charles Richter developed the magnitude scale, people went back to the old records and compared the seismograms from those days with similar records for later earthquakes. 3. Pellentes, iscing elit. Corrections? An earthquake is the shaking of the surface of the Earth resulting from a sudden release of energy in the Earth's lithosphere that creates seismic waves. #1.) Which statement describes earthquakes? Plates form on the lithosphere. The earliest seismoscope was invented by the Chinese philosopher Chang Heng in A.D. 132. Live Science - What Ever Happened to the Richter Scale? Below each dragon head was a toad with its mouth opened toward the dragon. Magnitude calculations are based on a logarithmic scale, so a ten-fold drop in amplitude decreases the magnitude by 1.If an amplitude of 20 millimetres as measured on a seismic signal corresponds to a magnitude 2 earthquake, then:10 times less (2 millimetres) corresponds to a magnitude of 1;100 times less (0.2 millimetres) corresponds to magnitude 0;1000 times less (0.02 millimetres) corresponds An earthquake cannot physically occur at a depth of 0 km or -1km (above the surface of the earth). They draw squares on maps for measurements. At this level doors would rattle, dishes break and weak or poor plaster would crack. Which statement best describes the Aztecs? - It measures large earthquakes far from the seismograph. It was designed to produce a more-accurate measure of the total energy released by an earthquake. - It estimates the total energy released from an earthquake. answer choices Earthquakes develop at Earth's surface. Which word identifies the shaking that results from movement under Earth's surface? As more seismograph stations were installed around the world, it became apparent that the method developed by Richter was strictly valid only for certain frequency and distance ranges. They were a primitive civilization with only simple weapons and no religion. It lies above the surface where rock breaks. point about 100 kilometers deep in the lithosphere. An earthquake is a sudden shaking of Earth's surface caused by the movement of rocks deep underneath. Earthquake waves, more commonly known as seismic waves, are vibrations generated by an earthquake and propagated within Earth or along its surface. You can draw and label The earthquake's magnitude is determined using the logarithm of the amplitude (height) of the largest seismic wave calibrated to a scale by a seismograph. This happens because the relation between the seismic measurements and the magnitude is complex and different procedures will often give slightly different magnitudes for the same earthquake. Michigan Tech - UPSeis - Where Do Earthquakes Happen? This includes compliance with the National Historic Preservation Act, Endangered Species Act, Clean Air Act, Clean Water Act, and other applicable laws and regulations; as well as conformance with applicable Hanford Site NEPA Environmental Assessments (EAs) or Environmental Impact Statements (EISs), such as the "Hanford Site Comprehensive Land The most important earthquake belt is the Circum-Pacific Belt, which affects many populated coastal regions around the Pacific Oceanfor example, those of New Zealand, New Guinea, Japan, the Aleutian Islands, Alaska, and the western coasts of North and South America. Seismographs are instruments used to record the motion of the ground during an earthquake. Seismic waves are produced when some form of energy stored in Earth's crust is suddenly released, usually when masses of rock straining against one another suddenly fracture and "slip." Share sensitive information only on official, secure websites. When an earthquake occurs, one of the first questions is "where was it?" Thousands of quakes occur every day but are too weak to be felt. Nam lacinia pulvinar tortor nec facilisis. Each seismic station in the network measures the movement of the ground at that site. Describe a) the Parkfield Earthquake study (4 points) b) what Access to over 100 million course-specific study resources, 24/7 help from Expert Tutors on 140+ subjects, Full access to over 1 million Textbook Solutions, m ipsum dolor sit amet, consectetur adipiscing elit. - It determines the amount of damage caused by an earthquake. What is the, recurrence interval of the fault a) 10 years b) 50 years c) 100 years d) 1000 years, The elastic rebound theory describes a) how earthquakes bounce off layers b) the, elasticity of rocks c) the flexibility of a fault d) how earthquakes recur along an active. They release energy. I think these are the correct answers let me know if I am correct or not. Which statements describe earthquakes? The slip of one block of rock over another in an earthquake releases energy that makes the ground vibrate. On Earth, we know that different materials vibrate in different ways. How can an earthquake have a negative magnitude? The violent shaking of the ground produces the greatest property losses and personal injuries. Updates? For this situation, each problem gives object distance p (centimeters), the type of mirror, and then the distance (centimeters, without proper sign) between the focal point and the mirror. Today the moment magnitude scale, a closer measure of an earthquakes total energy release, is preferred. plate Earthquakes can occur anywhere, but they occur mainly along fault lines (planar or curved fractures in the rocks of Earths crust), where compressional or tensional forces move rocks on opposite sides of a fracture. Earthquakes are caused by shifts in the outer layers of Eartha region called the lithosphere. It contains at least three of the The S, or secondary, waves arrive after the P waves. - The scale rates an earthquake based on its total energy released. Nam risus ante, dapibus a molestie consequat, ultrices ac magna. Seismographic data support disaster response, scientific research, and global security. Cerunem, also known as earwax, is secreted by glands that line the external auditory canal ________. The statement that best describes the true nature of earthquakes is that: They release Energy. Which statement describes the Mercalli scale? Both travel through liquids. - The scale has twenty ratings for an earthquake's effects. The shortcomings inherent in the original Richter scale spawned the development of improved Richter scales by Richter and Gutenberg. - It cannot account for fault movement during an earthquake. Earthquakes are caused by shifts in the outer layers of Eartha region called the lithosphere. Wind C. Natural Gas D. Corn Plz Help Which statement is always true about an acute triangle A: no sides are congruent B: all three angles are congruent C: all three angles are less than 90 degrees D: on angle is greater than 90 degrees Which best describes hitler's beliefs as expressed in mein kampf? The release of enormous energy leads to the development of earthquakes. ncrease in the moon jelly population. b More than 1 billion earthquakes happens per year. As the level rises toward the larger numbers, the amount of damage increases considerably. The energy from these forces is stored in a variety of ways within the rocks. It is located at the point where circles intersect on a map. An earthquake has one magnitude. In theory, the Richter scale has no upper limit, but, in practice, no earthquake has ever been registered on the scale above magnitude 8.6. It is estimated that 80 percent of the energy presently released in earthquakes comes from those whose epicentres are in this belt. Observation and interpretation of precursory phenomena, Exploration of the Earths interior with seismic waves, 6 of the Worlds Deadliest Natural Disasters. region directly above the focus Although modern scientific practice has replaced the original Richter scale with other, more-accurate scales, the Richter scale is still often mentioned erroneously in news reports of earthquake severity as the catch-all name for the logarithmic scale upon which earthquakes are measured. The moment can be estimated from seismograms (and also from geodetic measurements). What is a Geoid? Get a Britannica Premium subscription and gain access to exclusive content. Pellentesque dapibus efficitur laoreet. They write new content and verify and edit content received from contributors. How can an earthquake have a negative magnitude? Why do we use it and where does its shape come from? you like to eat. Earth's crust switches places in a periodic manner. It is used to locate an earthquake's focus. - Earthquakes that cause maximum damage are the most common. - It collects data using a seismograph. An earthquake is an intense shaking of Earths surface. Credit: Wikimedia Commons user Z22, CC BY-SA 3.0. They travel faster than P waves. Although the Earth looks like a pretty solid place from the surface, its actually extremely active just below the surface. The sliding does not take place smoothly, and after some time, the rocks get dissociate, resulting in an earthquake. Question 1-) what geographic feature(s) of Arkansas made it difficult for settlers to travel? Earthquake A has a Richter magnitude of 7 as compared with earthquake B's 6. Each increase of one unit on the scale represents a 10-fold increase in the magnitude of an earthquake. Please refer to the appropriate style manual or other sources if you have any questions. Corrections? Amount of damage can be used to determine intensity. All the 4 statements are describing earthquakes as they release energy, and are caused by reduced stress in rocks. The Mercalli Scale is based on observable earthquake damage. - It measures only small earthquakes. (in italics) use the map to answer the question. They arrive before S waves. It increases in density with depth. It is denser than continental crust and. Sometimes earthquakes are referred to by the maximum intensity they produce. Indeed, water waves are mechanical because they imply the oscillation of matter. epicenter It is determined by the arrival time of surface waves. rocks breaking They carry energy. It is relatively easy to acquire the necessary materials and build your own seismometer. a Most earthquakes are not strong enough to be felt by humans. answer choices The streams' directions have changed after the formation of a hot spot in Earth's crust. Earthquakes 5 views How are earthquakes recorded? plates getting larger Credit: NASA-JPL/Caltech. They travel from the epicenter. Richters scale was originally for measuring the magnitude of earthquakes from magnitudes 3 to 7, limiting its usefulness. They are caused by reduced stress in rocks. What was the duration of the earthquake? Anderson-Wood torsion pendulum seismograph, Learn how the Richter scale relies on vibration to logarithmically track earth tremors. USGS Earthquake Hazards - The Science of Earthquakes, earthquake - Children's Encyclopedia (Ages 8-11), earthquake - Student Encyclopedia (Ages 11 and up), earthquake-damaged neighbourhood of Port-au-Prince, Haiti. How do they have ANSWER - 50% of, 1. An earthquakes most intense shaking is often felt near the epicenter. When an earthquake occurred, one or more of the eight dragon-mouths would release a ball into the open mouth of A geoid is the irregular-shaped ball that scientists use to more accurately calculate depths of earthquakes, or any other deep object beneath the earths surface. Both produce minimal ground motion. United States Geological Survey (USGS) Natural Hazards Response, Earth Resources Observation and Science (EROS) Center. BRAINLIEST All dates are listed according to UTC time. Which statement describes the location of an earthquake's epicenter? (b) All reversible refrigeration cycles operating between the same two reservoirs have the same coefficient of performance. It begins about 5 kilometers below Earth's surface. They vibrate from side to side. This is what was to eventually become known as the Richter magnitude. First of all, the depth of an A seismometer is the internal part of the seismograph, which may be a pendulum or a mass mounted on a spring; however, it is often used synonymously with "seismograph". It is relatively easy to acquire the necessary materials and build your own seismometer. When rocks break, they cause _____ that move throughout, producing typhoons, which is a powerful system. - It shows only the strength of seismic waves that were produced. It is measured by the Mercalli scale. For example a level I-V on the Mercalli scale would represent a small amount of observable damage. What happens when stress builds at faults? Check all that apply. (See the table of major earthquakes.). The streams on one side of the fault have shifted in relation to the streams on the other side of the fault. Moment magnitude, Richter scale - what are the different magnitude scales, and why are there so many? It has a flat graphing surface. Lorem ipsum dolor sit amet, consectetur adipiscing elit. Donec aliquet. Which statement describes a seismograph? Secure .gov websites use HTTPS Nam risus ante, da, Explore over 16 million step-by-step answers from our library, itur laoreet. It lies above the surface where rock breaks. Each seismic station in the network measures the movement of the ground at that site. You can specify conditions of storing and accessing cookies in your browser. With this network, the United States maintains world leadership in monitoring the greatest natural and technological events that threaten o, Mexico was hit by one of the most devastating earthquakes in its history on September 19, 1985 at 7:18 a.m. MDT time. NASAs InSight mission took a seismometer to Mars to study seismic activity there, known as marsquakes. Which of these factors is involved in earthquake formation? a. Currently, we use the WGS84 version (World Geodetic System of 1984). The scale was developed for temblors occuring in southern California that were recorded using the Wood-Anderson seismograph and whose epicentres were less than 600 km (373 miles) from the location of the seismograph. Nam risus, acinia pulvinar tortor nec facilisis. A seismometer records seismic waves as a series of zig-zags. re The scale abandoned the use of peak wave amplitudes in its calculations, focusing instead on calculating an earthquakes seismic moment (M0)that is, the displacement of the fault across its entire surface multiplied by the force used to move the fault. Correct Answers-) A.) About 50,000 earthquakes large enough to be noticed without the aid of instruments occur annually over the entire Earth. The earthquakes are generally caused when the rocks present underneath gets break abruptly along a fault. Earthquakes are recorded by a seismographic network. Nam risus ante, dapibus a molestie consequat, ultrices ac magna. Let us know if you have suggestions to improve this article (requires login). Let us know if you have suggestions to improve this article (requires login). How are earthquakes measured? So the intensity of an earthquake will vary depending on where you are. Which statement describes one aspect of an earthquake's magnitude? When tectonic plates move, it also causes movements at the faults. The first is the length of time it takes for the fault to rupture and the second is the length of time shaking is felt at any given point (e.g. Which statement describes how geologists use data from seismographs to learn about earthquakes? Infrared light is also an electromagnetic radiation (all kind of lights are electromagnetic waves). These new discoveries will help us understand more about how planets like Marsand our home, Earthcame to be. This was a large urn on the outside of which were eight dragon heads facing the eight principal directions of the compass. You can specify conditions of storing and accessing cookies in your browser. c. It decreases in density with depth. How do identical twins What does it mean that the earthquake occurred at a depth of 0 km? 36 Questions from Britannicas Most Popular Science Quizzes, https://www.britannica.com/science/earthquake-geology. Answers. Which statement about the Mercalli scale is true? Seismographs are instruments used to record the motion of the ground during an earthquake. Share sensitive information only on official, secure websites. identical twin? It is not usually affected by the amount of fault movement. The moment is then converted into a number similar to other earthquake magnitudes by a standard formula. d. They are the most damaging. Course Hero is not sponsored or endorsed by any college or university. Answers The answer is option D. water waves. They occur at Earth's surface. this earthquake, which was centered about 380 kilometers west-southwest of Mexico City, had a surface-wave magnitude of 8.1. Pellentesque dapibus efficitur laoreet. Rocks that undergo elastic deformation will a) return to their original shape once the, stress is released b) cause a large magnitude c) undergo permanent deformation d), Energy waves that are released during an earthquake are called a) shock waves b), elastic waves c) stress waves d) seismic waves, Which of the following statements regarding aftershock is TRUE? it or describe it. It measures data used to find the difference between the arrival times of surface waves. - They use one reading to determine the location of an epicenter. In order for an earthquake to occur, two blocks of crust must slip past one another, and it is impossible for this to happen at or above the surface of the earth. In order for an earthquake to occur, two blocks of crust must slip past one another, and it is impossible for this to happen at or above the surface of the earth. Scientists can . When an earthquake occurs, it shakes the earth and destroys a lot of lives and property. Earthquake is a name for seismic activity on Earth, but Earth isnt the only place with seismic activity. Which strategy do geologists use to locate the center of an earthquake? Scientists can accurately predict when an earthquake will occur, but not where.D. This happens because the relation between the seismic measurements and the magnitude is complex and different procedures will often For earthquakes that occurred between about 1890 (when modern seismographs came into use) and 1935 when Charles Richter developed the magnitude scale, people went back to the old records and compared the seismograms from those days with similar records for later earthquakes. Environmental Studies Class 12 English Medium SEE ALL Advertisement Answer Which type of wave vibrates both side to side and up and down? Which statement describes the moment magnitude scale? Artists and scholars like Leonardo Da Vinci had to depend on wealthy and powerful people for support. Using the Kelvin-Planck statement of the second law of thermodynamics, demonstrate the following corollaries: (a) The coefficient of performance of an irreversible refrigeration cycle is always less than the coefficient of performance of a reversible refrigeration cycle when both exchange energy by heat transfer with the same two reservoirs. This record also provides information about the rocks the seismic waves traveled through. They begin at the epicenter. Nam lacinia pulvinar tortor nec facilisis. increasing the spread of infectious diseases. Why don't you report the duration of each earthquake? They only analyze local data. Earthquakes are recorded by a seismographic network. The primary goal of U.S. Geological Survey (USGS) Natural Hazards Response is to ensure that the disaster response community has access to timely, accurate, and relevant geospatial products, imagery, and services during and after an emergency event. Seismologist Charles F. Richter created an earthquake magnitude scale using the logarithm of the largest seismic waves amplitude to base 10.

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