How might they use this information? DocHub v5.1.1 Released! Run through the investigation yourself and record the data, just to see how long it takes. The answer is the San Andreas Fault. 74 Earthquake Activity: Locating the Epicenter and Time of Earthquake . This worksheet focuses on using the p and s graph to find different variables. Copyright USGS http://earthquake.usgs.gov/learn/kids/eqscience.php. Then from the same recordings they determine the earthquake's magnitude, an estimate of the amount of energy released during the earthquake. As discussed earlier in this lesson, this method of determining the epicenter of an . 9 - We have answers to the most popular questions from our customers. minute apart, represent the passage of time hWmo9+[+UH EkNB|6YiaVJ=cRh7{T1R,5LI1$K=s)XR&87@&$LTPLutlcyNuzjf--\?qaXZM&HM.Eg"HnTqSWqN0&~2kf0 Md|d&:zhe)7I? 12), Seek, evaluate, and use a variety of specialized resources available from libraries, the Internet, and the community to find scientific information on Earth's history To make a magnitude determination, two measurements are needed: the S-P interval (already determined earlier in the tutorial) and the maximum amplitude of the seismic waves. Ch Person/Attorney Filing: - Superior Court - Maricopa County - superiorcourt maricopa. If a quake is near the seismograph, the S-waves arrive shortly after the P-waves. Then do the same for the S-wave. So next, students compute the magnitude of this same earthquake by looking at the three simplified seismograms again, but this time selecting each's maximum S wave amplitude (height). 0000004769 00000 n Every year, earthquakes cause death and destruction worldwide. and S waves to travel any distance up to ya{I;W@DgMN2:UtbT=*+cY1.8Vm(u3Zt"J @9TAjJH@H_F3n7\Srdw~gAR#JQGj`ueS! Must engineers be content with mitigating disasters, instead of preventing them? We additionally manage to pay for . Another method of locating an earthquake is to use the P-wave arrival-time minus origin-time (P - O) interval instead of distance. hb```f``Rl@ (l"`+uk?0.a~@6Vm;| G3f`75@v@Wz|A4#w9{(` ) Epicenter is the location on the surface of the Earth directly above where the earthquake starts. Some places are more prone to earthquakes than others. In the ASN, standards are hierarchically structured: first by source; e.g., by state; within source by type; e.g., science or mathematics; Sixty-seven people lost their lives, and property damage was estimated at $6 billion. To locate the epicenter of the earthquake, seismologists use the . 0000004511 00000 n Apr 8, 2020 One seismogram indicates the distance to the epicenter. If the lag time were measured at a location closer to the epicenter, The period of a wave is the time between two adj, How does the period of the P waves compare to t. Use data from seismograms to locate the epicenters of earthquakes. Locating an Epicenter through Triangulation of Seismic Data- Remote/Hybrid/Live. 0000000016 00000 n Click on New Document and select the file importing option: upload Locating the epicenter of an earthquake worksheet answer key from your device, the cloud, or a protected link. (from left to right). 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At least 3 earthquake recording stations are required to find the location of the earthquake epicenter. Locating Earthquake Epicenter Lab Answer Key buysms de. In order to determine the location of an earthquake epicenter, seismographs from at least three different places are needed for a particular event. H\0y Identify P, S, and surface waves on seismograms, Measure amplitude and lag time on seismograms, Use triangulation to accurately locate the epicenter of an earthquake, Accurately report the latitude and longitude of the epicenter, Sea Floor Lab Help with Problem 2 - Tagged, Metamorphic Rocks Lab Instructions - Tagged, Lab exam 2 - Study guide for the second exam regarding all the labs and material covered, Redaccion de textos II Marco n membrete es aquello que se ubica en el sector superior de una pgina, mencionando el ttulo o el nombre de un individuo, una empresa, etc. We also acknowledge previous National Science Foundation support under grant numbers 1246120, 1525057, and 1413739. First, determine the P-wave arrival, and read down to the bottom of the seismogram to note at what time (usually marked in seconds) that the P-wave arrived. 1. Activity 4 Locating An Earthquake Epicenter Answers: Fill Out & Sign . between arrival of P and S waves is called When the tension becomes too great, the fault slips, causing an earthquake. 0 500 1000 1500 2000 2500 3000 A. Seismic waves-waves generated by an earthquake, can move the ground forward and back- answers the question. Choose an answer and hit 'next'. Civilization and its Discontents (Sigmund Freud), Educational Research: Competencies for Analysis and Applications (Gay L. R.; Mills Geoffrey E.; Airasian Peter W.), Brunner and Suddarth's Textbook of Medical-Surgical Nursing (Janice L. Hinkle; Kerry H. Cheever), Psychology (David G. Myers; C. Nathan DeWall), The Methodology of the Social Sciences (Max Weber), Business Law: Text and Cases (Kenneth W. Clarkson; Roger LeRoy Miller; Frank B. Since the 1970s, the use of the Richter magnitude scale has largely been replaced in the scientific community by the moment magnitude scale (MMS). The, amount of time that passes between the Pwave arrival and the Swave arrival is. travel time for P waves. U.S. Geological Survey, U.S. Department of the Interior. Triangulation is required to determine exactly where it happened. velocity, amplitude, and frequency of the Therefore, the lag 0000009174 00000 n A seismograph is securely mounted onto the surface of the earth so that when the earth shakes, the entire unit shakes with it EXCEPT for the mass on the spring, which has inertia and remains in the same place. Objective Use data from seismograms to locate the epicenters of earthquakes. The vertical lines, spaced one, minute apart, represent the passage of time, (from left to right). Quick Tips. 1. 0 87 0 obj <> endobj xref 87 28 0000000016 00000 n HlRnQ?R\>BjK' (Grades 9 - 12). See Answer. They make a model of a seismographa measuring device that records an earthquake on a seismogram. ACTIVITY 4.2B Locating an Earthquake Figure 4.5 shows seismograms for the same earthquake recorded at three locations - New York, Nome, Alaska, and Mexico City. travel 3,000 miles. atrial depolarization. long will it take, to the nearest 0. minutes, for the first P waves to travel from the epicenter to your station? The Earthquakes Living Lab gives students the chance to track earthquakes across the planet and examine where, why and how they are occurring. These distances are determined using a travel-time curve, which is a graph of Pand S-wave arrival times (see Figure 13.11). different types of seismic waves. Video Guide / Worksheets and Quizzes for Quizzes and Answer Sheet __ 2. (Source: USGS, Wikipedia). Though the distance to the epicenter can be determined using a travel-time graph, the direction cannot be told. Sign, fax and printable from PC, iPad, tablet or mobile with pdfFiller Note-taking Worksheet. The vertical lines, spaced one The distance to the earthquake epicenter is then determined using the "Earthquake P-Wave and S-Wave Travel Time" graph. earthquake lab lab: locating the epicenters of earthquakes objective measurable learning outcomes use data from seismograms to locate the epicenters of Skip to document Ask an Expert Sign inRegister Sign inRegister Home Ask an ExpertNew My Library Discovery Institutions Western Governors University Southern New Hampshire University Privacy Policy, Seismograms from seismic stations in Fresno, CA, Phoenix, AZ, and Las Vegas, NV, A modified travel time curve for S-P wave, A Modified Travel Time Curve for S-P Wave. Last updated November 26, 2013. 0000031066 00000 n American Geosciences Institute. It travels faster than the same earthquake's S wave (almost double the speed) and is similar to sound waves. 1) Identify the general term for waves released from an earthquake. 0000033429 00000 n The nations most famous fault is the San Andreas Fault, which runs along a north-south trend in southern California, and happens to run directly through Los Angeles. Activity 4: Locating an Earthquake Epicenter, The three basic types of seismic wave generated by an earthquake at its focus are P, waves, Swaves, and Surface waves. In this activity, students use an online simulationVirtual Earthquakethat is accessible through the Earthquakes Living Lab interface, to locate the epicenter of an earthquake by making simple measurement on three seismograms, recordings of an earthquake's seismic waves detected by instruments (seismographs) far away from the earthquake. When an earthquake strikes, P waves arrive at a seismograph rst and S waves next. 0000006984 00000 n trailer <<320C1F98F8FF4795B5CCB8D9E9A0B99B>]/Prev 812054/XRefStm 1396>> startxref 0 %%EOF 93 0 obj <>stream Ask students what fault they think caused this earthquake. Continue the discussion with the following questions (or assign these questions as homework): Have student groups explore one or more of the other two regions (Southern California and Japan) provided in the Virtual Earthquake simulation. The wavelength and frequency of a wave are related to one another by the speed of travel of the wave, which depends on the type of wave and the medium through which it is passing. Describe the logarithmic nature of the earthquake magnitude scale. 2. Please answer the following questions using the earthquake video - shake, shake, shake. Accessed December 11, 2013. http://en.wikipedia.org/wiki/Moment_magnitude_scale, Novak, Gary. The three seismograms in this activity are unfi ltered station records from a single event that occurred on August 1, 1999. E}g7$i(=K)"aj%v]vPcYloi@X3noGX{[XucOgkdF.>Ym^fwrQf;8_Nok3w\;?n_Hhc?>k\o[%DgwJ'3d.lTqDy_aJw! technology, engineering or math (STEM) educational standards. Do limits exist on what science can predict? Short for "primary wave" or "pressure wave." Share with Classes. Use mathematical representations of phenomena or design solutions to describe and/or support claims and/or explanations. Conclude the activity with a class discussion (and perhaps homework questions) to share ideas and answers, as described in the Assessment section. The time 5. focus - the point within Earth where an earthquake originates. X!.43p2t!}SLx-3z.KN4X+H\+vk? P and Swaves are body waves and travel, through the interior of the earth. Seismograms trailer <<0444DE89825047A1A483C62E98F50868>]>> startxref 0 %%EOF 114 0 obj <>stream Use Figure 4.5 and the travel-time graph in Figure 4.4 to determine the distance between each station and THREE SEISMOGRAMS the epicenter. Using the real-world data in the living lab enables students and teachers to practice analyzing data to solve problems and answer questions, in much the same way that scientists and engineers do every day. 0000079769 00000 n Last modified July 18, 2012. Draw your signature, type it, upload its image, or use your mobile device as a signature pad. The American Geosciences Institute represents and serves the geoscience community by providing collaborative leadership and information to connect Earth, science, and people. Hand out the worksheets to the groups and direct them to read through the instructions. Thanks for your feedback! The lag time for any Cross), Give Me Liberty! Engineers first determine where earthquakes are likely to occur, and how severe they are likely to be. directly above it on the surface of the earth is called the epicenter. Scientists use triangulation to find the epicenter of an earthquake. How do we determine the epicenter of an earthquake? 0000004457 00000 n PDF. Tips: Make sure students are reading the S waves and not the P waves. 0000002009 00000 n Make an overhead copy of each of the handouts. Send activity 4 locating an earthquake epicenter worksheet answers via email, link, or fax. HS]o01j6R0iMm4U=wL8]BE< 0000001777 00000 n The process is called triangulation. graph. Focus. MS-ESS3-2. %PDF-1.3 % Details. Thanks for your feedback! 0000030504 00000 n Epicenter. Do you think we will someday be able to prevent earthquakes? Subjects: 15 Bill Nye - Earthquakes Worksheet Key Earthquakes occur when the big pieces of earth's crust, called plates, move a little. The Richter scale was created in the 1930s to assign a single number to quantify the energy released during earthquakes. If a quake is far from the seismograph, the P-waves arrive long before the S-waves. Earthquakes and Volcanoes. Specifically, seismographs make recordings (seismograms) of the seismic waves generated from earthquakes, providing engineers and other researchers with data that they use to make predictions about future earthquakes. View Notes - Locating_an_epicenter_activity from SCIENCE Earth Scie at Toms River High North. The farther a station is from the Every earthquake is recorded on numerous seismographs located in different directions. Do you agree with this alignment? Students learn about factors that engineers take into consideration when designing buildings for earthquake-prone regions. Use this information to complete the following. 0000002250 00000 n Dochub is the best editor for changing your documents online. 0000103591 00000 n The magnitude is the logarithm of the amplitude of the ground wave. Have students turn in their answers for the Explain portion of the worksheet. 0000003254 00000 n The living lab presents earthquake information through a focus on four active seismic areas and historic earthquakes in those areas. It shows the time required for P minutes? minutes = 6 minutes. How far do S waves travel in 5 Geologists use seismic waves to locate an earthquake's epicenter. =Cv :~4yrXP 62{_,*Uq/O-oUNBr-$y~:G},#3e^CS6U*_zVGY7ZNUWk2f?? {%!,"{u5E&OOqA_"/uxn-kx+Vz*EQb)Q Many updates and improvements! aqmd. If a quake is far from the seismograph, the P-waves arrive long before the S-waves. activity 4 locating an earthquake epicenter The Science of Earthquakes | U.S. Geological Survey An earthquake is what happens when two blocks of the earth suddenly slip past one . Students first triangulate the location of an earthquake's epicenter, then calculate its magnitude. Point on Earth's surface directly above an earthquake's focus. Earthquakes occur along faults, which are cracks in the Earths crust that build tension. Y$Kr;V6[;Dq vg~cx:A[^jCssupwD endstream endobj 80 0 obj <> endobj 81 0 obj <>stream HTn0"H@w=s(vxk8OM1px-{$_!o5|CS7RPr#V(0CUa%ZkuT9t};D Jj=.9,z!#@n5YCu>R88tfFRX=iRK One seismogram indicates the distance to the epicenter. Finding the Epicenter Determine the epicenter distance from three different seismographs. While no one can predict earthquakes, knowing the intensities, frequencies and locations of past earthquakes and fault planes helps us to better anticipate the locations and forces to expect, so we can do our best to prepare our communities and infrastructure to withstand them safely. After this activity, students should be able to: Each TeachEngineering lesson or activity is correlated to one or more K-12 science, Earthquake Location 2 Using the skills that you acquired in the picking P and S arrivals, you can now locate an earthquake using real seismic records. Millions of people witnessed the motion of the earthquake on television. Download. What was the lag time (in minutes) at this location? Accessibility StatementFor more information contact us atinfo@libretexts.orgor check out our status page at https://status.libretexts.org. HtA1D41`s(GME$Ke*YdEOYf2-:r. Sharing Information/Thinking Ahead: In the Evaluate section of the worksheet, student pairs are asked to compose answers to two questionswhether they think seismology is a reliable science and ways seismic data is useful for engineers.
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