They are produced by P and S waves. (See the table of major 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. 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. (in fact electromagnetic radiation). The statement that best describes the true nature of earthquakes is that: They release Energy. Nam risus ante, dapibus a molestie consequat, ultrices ac magna. What does it mean that the earthquake occurred at a depth of 0 km? 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? This was a large urn on the outside of which were eight dragon heads facing the eight principal directions of the compass. Intensity scales, like the Modified Mercalli Scale and the Rossi-Forel scale, measure the amount of shaking at a particular location. energy released. They begin at the epicenter. It increases in density with depth. Articles from Britannica Encyclopedias for elementary and high school students. Rock can bend and break. In addition, the Richter scale could not be used to calculate the total energy released by an earthquake or describe the amount of damage it did. Credit: Public Domain. A lock () or https:// means youve safely connected to the .gov website. The scale rates an earthquake according to how much damage it causes. 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? Scientists can . The statement that best describes the international situation in the decades just prior to both World War 1 and World War 2 is the one having to do with many nations facing an economic depression, since depressions often help lead to war. What unresolved conflict was made worse by adding more territory to the United States in the early to mid-1800s 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. They result from movement on Earth's surface. How can an earthquake have a negative depth; that would mean its in the air. answer choices It creates stress in rock. Our editors will review what youve submitted and determine whether to revise the article. 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. stress that decreases These new discoveries will help us understand more about how planets like Marsand our home, Earthcame to be. Each seismic station in the network measures the movement of the ground at that site. Pellentesque dapibus efficitur laoreet. It is measured by the Mercalli scale. Why do we use it and where does its shape come from? They travel from the epicenter. So the intensity of an earthquake will vary depending on where you are. You can specify conditions of storing and accessing cookies in your browser. What is a Geoid? These phenomena are primarily responsible for deaths and injuries. When an earthquake occurs, one of the first questions is "where was it?" Select the two correct answers. waves. Live Science - What Ever Happened to the Richter Scale? The first earthquake occurred near the U.S.- Mexico border . It contains two or more foods containing fiber. Which strategy do geologists use to locate the center of an earthquake? 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). Earth's crust undergoes a cycle from a solid material to magma. They arrive before P waves. (c) The coefficient of performance of an irreversible heat pump cycle is always less than the coefficient of performance of a reversible heat pump cycle when both exchange energy by heat transfer with the same two reservoirs. A white Ford F-150 truck hit a large metal column . Over the centuries they have been responsible for millions of deaths and an incalculable amount of damage to property. This photograph shows the San Andreas Fault, a 750-mile-long fault in California. Fusce dui lectus, congue vel laoreet ac, dic, ec aliquet. Nam risus ante, dapibus a molestie consequat, ultrices ac magna. d. They are the most damaging. location Thousands of quakes occur every day but are too weak to be felt. The earthquakes are generally caused when the rocks present underneath gets break abruptly along a fault. Making land less arable and unsuitable for farming and settlement. - They obtain information about the intensity of earthquakes from seismographs. Updates? What was the first instrument that actually recorded an earthquake? 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. A diagram of Earth's layers. plates getting larger As the level rises toward the larger numbers, the amount of damage increases considerably. Which of the following statements BEST describes the current state of, Scientists can accurately predict the time and location of almost all, Scientists can accurately predict the time and location of approximately 50, Scientists can accurately predict when an earthquake will occur, but not. Donec aliquet. University of Saskatchewan - Physical Geology - What is an Earthquake? They travel through liquids. There are four principal types of elastic waves: two, primary and secondary waves, travel within Earth, whereas the other two, Rayleigh and Love waves, called surface waves, travel along its surface. Earthquakes are caused by shifts in the outer layers of Eartha region called the lithosphere. How do they work? Richter scale (ML), quantitative measure of an earthquakes magnitude (size), devised in 1935 by American seismologists Charles F. Richter and Beno Gutenberg. Pellentesque dapibus efficitur laoreet. Select the two correct answers. earthquake Seismology, which involves the scientific study of all aspects of earthquakes, has yielded answers to such long-standing questions as why and how earthquakes occur. Earthquakes are recorded by a seismographic network. An earthquake causes many different intensities of shaking in the area of the epicenter where it occurs. - Earthquakes that cause maximum damage are the most common. They are installed in the ground throughout the world and operated as part of a seismographic network. How are S waves and P waves similar? Select all that apply. Which statement describes the focus of an earthquake? How can an earthquake have a negative depth; that would mean its in the air. Create a meal from natural foods that The maximum intensities are based on the Modified Mercalli intensity scale. Donec aliquet. They move in one direction. 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. Only earthquakes of magnitude 6 or above are included, unless they result in significant damage and/or casualties. The destructive effects of earthquakes are from landslides, tsunamis, fires, and fault rupture. Correct Answers-) A.) 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. Course Hero is not sponsored or endorsed by any college or university. Answers The answer is option D. water waves. a) Germans were destined to . What is a Geoid? Which of the following statements best describes the state of earthquake prediction? Which statements describe earthquakes? Earthquakes associated with this type of energy release are called tectonic earthquakes. Draw or describe your meal in the space below: Which statement describes the Richter scale? - It measures only small earthquakes. Earthquakes are recorded by a seismographic network. It is located using a single set of data. increasing the spread of infectious diseases. Infrared light is also an electromagnetic radiation (all kind of lights are electromagnetic waves). They carry energy. On the original Richter scale, the smallest earthquakes measurable at that time were assigned values close to zero on the seismograph of the period. The location may tell us what fault it was on and where damage (if any) most likely occurred. They collect data from seismographs. Intensity X (10) is the highest value on the MMI. They begin at the epicenter. A. Geothermal B. The destructive behavior of great earthquakes in subduction zones, such as in Japan in 2011, depends on details of the earthquake slip. 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. earthquake, any sudden shaking of the ground caused by the passage of seismic waves through Earth 's rocks. For earthquakes measuring magnitude 6.5 or greater, Richters original methodology has been shown to be unreliable. The moment can be estimated from seismograms (and also from geodetic measurements). A. They range from very simple and inexpensive to sophisticated and pricey. Earth's crust is fractured into tectonic plates that have been moving very slowly over the Earth's surface for millions of years. What does it mean that the earthquake occurred at a depth of 0 km? Which statement describes seismic waves? Most quakes are unnoticeable by people on Earth's surface. Tectonic plates are constantly shifting as they drift around on the viscous, or slowly flowing, mantle layer below. Nam lacinia pulvina. which behavioral therapy intervention might be used in a special education classroom for children with attention deficit hyperactivity disorder. They move side to side. The links here are to various sources with information on how to build a seismometer. Often, several slightly different magnitudes are reported for an earthquake. 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. damage 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. 36 Questions from Britannicas Most Popular Science Quizzes, https://www.britannica.com/science/earthquake-geology. The magnitude does not depend on where the measurement is made. answer choices The streams' directions have changed after the formation of a hot spot in Earth's crust. c. They are last to reach the epicenter. Often, several slightly different magnitudes are reported for an earthquake. (That was the Richter magnitude for the Chile earthquake of 1960. The _____ magnitude scale is useful for measuring the strength of earthquakes of all sizes and at all distances from a seismograph.
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