Epicenter. Objective Use data from seismograms to locate the epicenters of earthquakes. The lag time for any 0000002383 00000 n 0000004060 00000 n Tracings made at three separate seismic stations are needed to locate an earthquake epicenter. 83 0 obj <> endobj View Notes - Locating_an_epicenter_activity from SCIENCE Earth Scie at Toms River High North. (from left to right). You can also download it, export it or print it out. These natural disasters may be mitigated, however, by insightful and creative engineering. 12), Evaluate ways that technology can impact individuals, society, and the environment. One seismogram indicates the distance to the epicenter. The epicenter is the point directly above it at the surface of the Earth. 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. You will analyze the records and locate the earthquake using a method known 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. velocity, amplitude, and frequency of the %PDF-1.5 % So the difference in the P- and S-wave arrival times determines the distance between the epicenter and a seismometer. travel 3,000 miles. Please answer the following questions using the earthquake video - shake, shake, shake. Wikipedia, The Free Encyclopedia. Locating an Epicenter through Triangulation of Seismic Data- Remote/Hybrid/Live. Once three seismographs have been located, find the time interval between the arrival of the P-wave . Millions of people witnessed the motion of the earthquake on television. The uses of technologies and any limitations on their use are driven by individual or societal needs, desires, and values; by the findings of scientific research; and by differences in such factors as climate, natural resources, and economic conditions. 0000003254 00000 n graph. Finding the Epicenter. 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 epicenter: A point on the Earth's surface that is directly above the place where the underground forces of an earthquake originate. What about P waves? 0000008845 00000 n 0000004511 00000 n Then do the same for the S-wave. For purposes of this activity, the least complicated and probably most accurate approach is to just use the term "magnitude," without needing to say "on the Richter scale" or "on the moment magnitude scale." How are S and P waves used to determine how far away epicenters are? Do you agree with this alignment? https://people.wou.edu/~taylors/gs104/lab5key.pdf Locating Earthquake Epicenters | CK-12 Foundation Apr 8, 2020 . Encourage them to explore all of the Earthquakes Living Lab as they complete the worksheet. Civil engineers, who design houses, apartment buildings, schools, skyscrapers, bridges, highways, tunnels, water treatment facilities, factories and other structures, may use this data to help them create safer structures that are less likely to sustain damage during earthquakes. Do you agree with this alignment? Epicenter Location on Earth's surface directly above the focus of the earthquake 5. It takes S waves 14. Sign, fax and printable from PC, iPad, tablet or mobile with pdfFiller Note-taking Worksheet. a project of D2L (www.achievementstandards.org). In order to determine the location of an earthquake epicenter, seismographsfrom at least three different places are needed for a particular event. Figure 8. When an earthquake strikes, P waves arrive at a seismograph rst and S waves next. Type text, add images, blackout confidential details, add comments, highlights and more. 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. Earthquakes & Volcanoes Test Review Answers. Practice with Triangulation: Locating an earthquake epicenter. If a quake is near the seismograph, the S-waves arrive shortly after the P-waves. $8.25. Finding the epicenter worksheet answer key. Step 1: ans- d) 65 seconds Ste . This is determined by the P-and S-wave arrival times. As you read and complete the activity, take notes so you can complete the. Before going to the classroom, you will need to: Provide each student, with the following: Earthquakes occur every day all over the United States and all over the world. The process is called triangulation. 0000001978 00000 n If you complete all the problems, you should be able to: Identify P, S, and surface waves on a simple seismogram. 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 trailer <<0444DE89825047A1A483C62E98F50868>]>> startxref 0 %%EOF 114 0 obj <>stream Run through the investigation yourself and record the data, just to see how long it takes. by. Subjects: Ch Person/Attorney Filing: - Superior Court - Maricopa County - superiorcourt maricopa. Do limits exist on what science can predict? 0000098546 00000 n Most of these earthquakes are small tremors that cant be felt by people, but occasionally an earthquake occurs on a large magnitude that causes millions of dollars in property damage and kills hundreds to thousands of people. 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. Ask students what fault they think caused this earthquake. HS-PS4-1. 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. Great-circle arcs are drawn on the globe using the distance of the earthquake to the station as a radius. The distance is in kilometers. Make arrangements so that each student group has a computer with Internet access. Three seismographs are needed. A circle with a radius of the distance to the quake can be drawn. A minimum of three seismic stations is necessary to locate an epicenter. They make a model of a seismographa measuring device that records an earthquake on a seismogram. It is slower than the same earthquake's P wave and cannot travel through liquids. Thanks for your feedback! 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We additionally manage to pay for . A. Seismic waves-waves generated by an earthquake, can move the ground forward and back- answers the question. P and Swaves are body waves and travel, through the interior of the earth. Direct student pairs to independently complete the tutorial/simulation to find an epicenter location via the triangulation method and compute the earthquake magnitude: The simulation directs students to look at three simplified seismograms from seismic stations in Chile (Talca, Santiago, Osorno) and select the correct measurements of the S-P intervals. minutes? The spot where those three circles intersect is the epicenter (Figure 13.12). Use Figure 5 and the travel-time graph in Figure 4 to determine . Why might the triangulation method not always produce an exact point (other than your measurement errors)? Quick Tips. An earthquake is the violent movement of tectonic plates in the Earth's crust. This is determined by the P-and S-wave arrival times. PDF. X!.43p2t!}SLx-3z.KN4X+H\+vk? The vertical lines, spaced one, minute apart, represent the passage of time, (from left to right). Analyze and interpret data on natural hazards to forecast future catastrophic events and inform the development of technologies to mitigate their effects. Explains how to find an earthquake epicenter using at least three seismograph stations. Was there an initial quake followed by smaller quakes? CH 02 HW - Chapter 2 physics homework for Mastering, Leadership class , week 3 executive summary, I am doing my essay on the Ted Talk titaled How One Photo Captured a Humanitie Crisis https, School-Plan - School Plan of San Juan Integrated School, SEC-502-RS-Dispositions Self-Assessment Survey T3 (1), Techniques DE Separation ET Analyse EN Biochimi 1, Use a travel-time graph to convert lag time into distance. In this 1-to-10 logarithmic scale, each succeeding level representing 10 times as much energy as the last. pen recorded the arrival of P, S, and surface Choose an answer and hit 'next'. Some places are more prone to earthquakes than others. 9 - 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. Use the graph to answer the questions that follow. What types of engineers might use this data the most? The living lab presents earthquake information through a focus on four active seismic areas and historic earthquakes in those areas. The epicenter of an earthquake can be found using the difference between the arrival of the Primary and Secondary waves. (i. Expert Answer. The farther away the epicenter is, the greater the difference . 0000103591 00000 n HTn {0,`K6}(J6]&Q^"!q57y_VQ9fp3/?Mc=KGsrrt:c\$Lh`4}>C>`qcSj0[YpZ_Su(322/N Z./$E )H %C[5ph[BUyGh7|!XPQiDjJ(|BNvylk+g;9G(#Aby>Jcf`XmnwtDD+;Z^I&Sb-4!7oi` L7 endstream endobj 78 0 obj <> endobj 79 0 obj <>stream determine the epicenter using the S P (S minus P) method. !5(~q* directly above it on the surface of the earth is called the epicenter. long will it take, to the nearest 0. minutes, for the first P waves to travel from the epicenter to your station? Mapping the history of natural hazards in a region, combined with an understanding of related geologic forces can help forecast the locations and likelihoods of future events. =Cv :~4yrXP 62{_,*Uq/O-oUNBr-$y~:G},#3e^CS6U*_zVGY7ZNUWk2f?? {%!,"{u5E&OOqA_"/uxn-kx+Vz*EQb)Q Sixty-seven people lost their lives, and property damage was estimated at $6 billion. This section explains what earthquakes and faults are and what causes earthquakes. ya{I;W@DgMN2:UtbT=*+cY1.8Vm(u3Zt"J @9TAjJH@H_F3n7\Srdw~gAR#JQGj`ueS! 0000030504 00000 n How does distance from the epicenter affect the magnitude (height) of the seismograph reading? The real-world earthquake data is viewable via a graphical interface using a scaling map. Explain the difference between S and P waves, and how their time interval is used to determine the epicenter location. Y$Kr;V6[;Dq vg~cx:A[^jCssupwD endstream endobj 80 0 obj <> endobj 81 0 obj <>stream Video Guide / Worksheets and Quizzes for Quizzes and Answer Sheet __ 2. Describe the logarithmic nature of the earthquake magnitude scale. The western U.S. has more faults than the eastern U.S., and therefore the western U.S. has more earthquakes. What is the Have students click on the Earthquakes Living Lab hyperlink in the top left in the earthquakes section. How does the period of the P waves compare to the period of the surface waves? within type by subtype, then by grade, etc. 0 500 1000 1500 2000 2500 3000 5. focus - the point within Earth where an earthquake originates. 61 0 obj <> endobj xref You will receive your score and answers at the end. Earth and Space, Physical Science, A process called triangulation uses seismic data from three locations to identify the epicenter of an earthquake.copyrightCopyright USGS http://earthquake.usgs.gov/learn/kids/eqscience.php. 0000002507 00000 n Apr 8, 2020 One seismogram indicates the distance to the epicenter. Point on Earth's surface directly above an earthquake's focus. (Source: USGS, Wikipedia). 0000007783 00000 n As discussed earlier in this lesson, this method of determining the epicenter of an . 87 0 obj <> endobj xref 87 28 0000000016 00000 n Direct students to finish the activity by completing the. Fill Locating The Epicenter Of An Earthquake Worksheet Answers, Edit online. 13 4 locating an earthquake epicenter geosciences libretexts . What is the time lag for the Seattle, Washington, seismic station? 0000004224 00000 n /g$=#!$EbBbhD!,x so^6Uc})\uJs=fyY}j'|YjTm8B_[}*Ovm\[J'.mu?lQg,wzJM^X&P w>-T%*h%J4 yB@VPmP]@D------------,2dfY$"A!ANAASi)4$dniiiinH% Gxt5DJ) )9RRr$II'y ??O's^3@[{*{VT?nsNS!ilq]mFO?? The answer is the San Andreas Fault. to the lag time measured at this location? Describe the process of triangulation to locate an epicenter. Doing this generates an S-P interval graph (time vs. distance, called the travel-time curve graph) from which they determine and select three epicentral distances. Short for "primary wave" or "pressure wave." (Grades EARTHQUAKES: Epicenter Determination and Seismic Waves First locate and mark the three seismic stations on the world map provided below. For upper grades, have students work individually, do two of the three seismic area tutorials, and look up historical earthquakes to learn their magnitudes, and make data tables or graphs with this information. Describe what the "magnitude" of an earthquake is. 3. H\0y located 1,000 miles from the To abbreviate, use the symbol M (a capital M, plain text, no sub/superscripts) expressed to the nearest 0.1. P and Swaves are body waves and travelthrough the interior of the earth. 0000002094 00000 n 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. Add to FlexBook Textbook. (, Find the S-P interval for each seismogram and record answers in the S-P column of, Find the distance to the epicenter (in kilometers) from each recording station and record answers in Table 1. If the lag time were measured at a location closer to the epicenter, how would it compare 0000002009 00000 n Graphs, charts, and images can be used to identify patterns in data. Facility Name Busine Child ren Information Child Name C. Child Social Security Number Type of Case being filed - Check only one category. Then locate and click the link in the center of the page under the question: "How is an earthquake epicenter located and how is magnitude determined?" 4. The period of a wave is the time between two adjacent wave peaks. Construct an oral and written argument supported by empirical evidence and scientific reasoning to support or refute an explanation or a model for a phenomenon or a solution to a problem. 9 - All rights reserved. Overhead transparency of each of the handouts, Overhead projector (contact classroom teacher about this) and screen, Optional: overhead transparency or PowerPoint of, What do you know about the causes and impacts of Earthquakes? This activity is designed around the Earthquakes Living Lab, a resource and online interface that uses real-time U.S. Geological Survey seismic data from around the world. Using this resource students find the arrival times of P-waves and S-waves using a seismogram. Question: ACTIVITY 2B Locating an Earthquake Figure 5 shows seismograms for the same earthquake recorded at three locations-New York; Nome, Alaska; and Mexico City.
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