13. locate and label the epicenter of the earthquake on this map. Y$Kr;V6[;Dq vg~cx:A[^jCssupwD endstream endobj 80 0 obj <> endobj 81 0 obj <>stream PDF EARTHQUAKE EPICENTER LOCATION EXERCISE - Idaho geology 0000000956 00000 n When an earthquake strikes, P waves arrive at a seismograph rst and S waves next. Lab Activity Locating Epicenters Flashcards | Quizlet 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. X!.43p2t!}SLx-3z.KN4X+H\+vk? (Source: USGS, Wikipedia). Take a few minutes to read the information on the left side of this page for the 2010 earthquake off the coast of central Chile. Lab Lesson 4 - Lab Lesson 4: Earthquakes and Seismology, Do you agree with this alignment? Looking at the nomogram, students click on each location data point to see where the three lines intersect to read the estimated magnitude. 0000001777 00000 n Follow this simple guide to edit Locating the epicenter of an earthquake worksheet answer key in PDF format online free of charge: Explore all the advantages of our editor right now! Locating an Epicenter Activity - Arkansas Geological Survey located 1,000 miles from the 3. Video Guide / Worksheets and Quizzes for Quizzes and Answer Sheet __ 2. 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. If a quake is near the seismograph, the S-waves arrive shortly after the P-waves. Focal Depth. The farther a station is from the locating the epicenter of an earthquake activity - TeachersPayTeachers earthquake. Type text, add images, blackout confidential details, add comments, highlights and more. Make arrangements so that each student group has a computer with Internet access. Several thousand seismographs exist at locations around the planet, continuously measuring abnormalities in the Earth's movement. The point where your ruler crosses the middle line on the chart marks the magnitude (strength) of the earthquake. U.S. Geological Survey, U.S. Department of the Interior. Before looking at the Earthquakes Living Lab, have pairs complete the, Then guide the teams to the Earthquakes Living Lab via the living lab website at. Share with Classes. 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. 2. It takes S waves 14. 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. miles from the epicenter of an 0000005081 00000 n Get the inside scoop on all things TeachEngineering such as new site features, curriculum updates, video releases, and more by signing up for our newsletter! The point of origin of an earthquake is called its focus and the point on the Earth's surface directly above the focus is the epicenter. Multiply the difference by 8.4 to estimate the distance, in kilometers, from the seismograph station to the epicenter. Locating an Earthquake's Epicenter - American Geosciences Institute 0000079769 00000 n 3000 miles. Locating Earthquake Epicenter Worksheet Answer Key The real-world earthquake data is viewable via a graphical interface using a scaling map. First locate and mark the three seismic stations on the world map provided below. There are two sets of data and maps to do this activity/ lab for than once. An earthquake is the violent movement of tectonic plates in the Earth's crust. 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. %PDF-1.3 % Hands-on Activity Earthquakes Living Lab: Finding Epicenters 92 0 obj <>/Filter/FlateDecode/ID[]/Index[83 25]/Info 82 0 R/Length 62/Prev 466624/Root 84 0 R/Size 108/Type/XRef/W[1 2 1]>>stream A little under 30 seconds, maybe around 26 seconds. 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. Explain the difference between S and P waves, and how their time interval is used to determine the epicenter location. 12), Evaluate ways that technology can impact individuals, society, and the environment. Use the process of triangulation to locate an earthquake's epicenter. Copyright USGS http://earthquake.usgs.gov/learn/kids/eqscience.php. Epicenter. Thanks for your feedback! Take a few minutes to read the information on the left side of this page for the 2010 earthquake off the coast of central Chile. Then from the same recordings they determine the earthquake's magnitude, an estimate of the amount of energy released during the earthquake. 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. 9 - The Richter scale was created in the 1930s to assign a single number to quantify the energy released during earthquakes. The living lab presents earthquake information through a focus on four active seismic areas and historic earthquakes in those areas. 0000055643 00000 n The three seismograms in this activity are unfi ltered station records from a single event that occurred on August 1, 1999. Answer the following questions in the spaces provided. How do we determine the epicenter of an earthquake? Locating An Earthquake Epicenter Worksheet Answers epicenter: A point on the Earth's surface that is directly above the place where the underground forces of an earthquake originate. Travel-time graphDistance in Miles, Copyright 2023 StudeerSnel B.V., Keizersgracht 424, 1016 GC Amsterdam, KVK: 56829787, BTW: NL852321363B01, seismogram. hbb2b`b``a I @ endstream endobj 62 0 obj <>/Metadata 55 0 R/Pages 51 0 R/StructTreeRoot 57 0 R/Type/Catalog/ViewerPreferences<>>> endobj 63 0 obj <>/Font<>>>/Fields[]>> endobj 64 0 obj <>/Font<>/ProcSet[/PDF/Text]>>/Rotate 0/TrimBox[0.0 0.0 612.0 792.0]/Type/Page>> endobj 65 0 obj <> endobj 66 0 obj <> endobj 67 0 obj <> endobj 68 0 obj <>stream Virtual Earthquake (tutorial/simulation) 1996. It is called triangulation because a triangle has three sides, and it takes three seismographs to locate an earthquake. 0000002094 00000 n Success is figuring out that the estimated magnitude is 5.9. Yw8SxGk}X3kfTfW& gk`41#'uf7"G\fsN4^8jC7[+%`qFLFKpFc approximate period of the surface waves in seconds? Contact the teacher to find out the length of the class period, as well as how many copies of handouts and sets of materials you need to bring. As discussed earlier in this lesson, this method of determining the epicenter of an . Answers to the Finding the Epicenter Gizmos Lab - Name: Earthquakes 2 The process is called triangulation. endstream endobj startxref PDF ActivityEarthquake Location* - Cascadia Earthscope Earthquake and Practice with Triangulation: Locating an earthquake epicenter. These natural disasters may be mitigated, however, by insightful and creative engineering. Figure 13.10). This opens a new window to Michigan Techs UPSeis informational site about earthquakes and seismology. 0000002250 00000 n 0000002544 00000 n at that station. 1. It travels faster than the same earthquake's S wave (almost double the speed) and is similar to sound waves. Geology Labs On-Line, Department of Geological Sciences, California State University, Los Angeles, CA. Three seismographs are needed. Question 5 of 22 4.55/ 4.55 Points Questions 5 through 11 are based on Lab Exercise #2: Locating the Epicenter of an Earthquake. For this activity, select the "Chile" box. The simulation renders three circles on a map and directs students to find the epicenter. 6. This is determined by the P-and S-wave arrival times. 0000001143 00000 n 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 . Last modified July 18, 2012. longer or shorter). Expert Answer. Shear wave from earthquake, moving slower than primary waves, through solid material only. from the epicenter will be 14 8. [N'. Download. Where the 3 circles intersect is the approximate location to the epicenter of the earthquake. 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The vertical lines, spaced one View Notes - Locating_an_epicenter_activity from SCIENCE Earth Scie at Toms River High North. seismograph: An instrument that measures motions of the ground, including those of seismic waves generated by earthquakes. Adjust the timing to the class period, remembering that you will need time to introduce the investigation, clean up afterwards, and re-set up for the next class (if you are working with more than one class). Once three seismographs have been located, find the time interval between the arrival of the P-wave and the arrival of the S-wave. To complete the activity, some prior . Have students turn in their answers for the Explain portion of the worksheet. Accessed December 11, 2013. http://earthquake.usgs.gov/aboutus/docs/020204mag_policy.php. Nov 2, 2020 Triangulation is used to determine the location of an earthquake. Figure 2 is a seismic wave travel-time H\0y gov For online instructions and current fees click here. It is slower than the same earthquake's P wave and cannot travel through liquids. Details. long will it take, to the nearest 0. minutes, for the first P waves to travel from the epicenter to your station? Review their answers to assess their base knowledge of the subject matter. As the drum rotated, the Engineers first determine where earthquakes are likely to occur, and how severe they are likely to be. n{6c&6NK*U;=9i%nF 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. The earthquake occurred somewhere along that circle. Refer to the data table and use the difference in arrival times to determine the distance to the earthquake epicenter for Station 2. Thanks for your feedback! inch = 500 km. One seismogram indicates the distance to the epicenter. As you read and complete the activity, take notes so you can complete the. 0000002383 00000 n Divide the class into student pairs, and have them assemble at their computers with journals/paper and writing instruments. 4. fault - a fracture in Earth's crust where the rocks on either side have moved. These distances are determined using a travel-time curve, which is a graph of Pand S-wave arrival times (see Figure 13.11). trailer <<320C1F98F8FF4795B5CCB8D9E9A0B99B>]/Prev 812054/XRefStm 1396>> startxref 0 %%EOF 93 0 obj <>stream Do limits exist on what science can predict? and S waves depends on the distance from the epicenter of the answer the following question. Students learn about the types of seismic waves produced by earthquakes and how they move through the Earth. aqmd. Click for facts and worksheets in PDF! Today, most seismologists no longer follow Richter's original methodology because it does not give reliable results when applied to stronger earthquakes and it was not designed to use data from earthquakes recorded at epicentral distances greater than ~600 km. 0000007097 00000 n Hand out the worksheets to the groups and direct them to read through the instructions. Run through the investigation yourself and record the data, just to see how long it takes. Figure 8. Key Facts & Information. lag time. American Geosciences Institute. (, 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. However, please review it for the specific setting, materials, students, and conventional safety precautions. The spot where those three circles intersect is the epicenter (Figure 13.12). 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. 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. 0000098546 00000 n 61 33 %%EOF 0000001893 00000 n 0000001675 00000 n The western U.S. has more faults than the eastern U.S., and therefore the western U.S. has more earthquakes. earthquake - shaking and vibration of Earth's surface. We also acknowledge previous National Science Foundation support under grant numbers 1246120, 1525057, and 1413739. Analyze and interpret data on natural hazards to forecast future catastrophic events and inform the development of technologies to mitigate their effects. How does the period of the P waves compare to the period of the surface waves? EARTHQUAKES: Epicenter Determination and Seismic Waves First locate and mark the three seismic stations on the world map provided below. Also called seismometer. Today we will be using a traveltime graph, where the vertical separation between, the P and S curves is equal to the difference in the arrival times between the Pwave, and Swave. !D,X2:azTG)kPT~Mj 4>d w@O'. Earthquakes & Volcanoes Test Review Answers. Use the graph to answer the questions that follow. 0000003254 00000 n If a quake is near the seismograph, the S-waves arrive shortly after the P-waves. =Cv :~4yrXP 62{_,*Uq/O-oUNBr-$y~:G},#3e^CS6U*_zVGY7ZNUWk2f?? {%!,"{u5E&OOqA_"/uxn-kx+Vz*EQb)Q All the arcs should intersect at a common point - the epicenter. The time Triangulation to Locate an Earthquake By Earthquake Hazards Original Thumbnail Medium Detailed Description Triangulation can be used to locate an earthquake. PDF Finding Epicenters Lab Answer Key Lab Pdf www.teachengineering.org/activities/view/csm_findingepicenters_activity1, Search curriculum by Common Core standards, http://www.teachengineering.org/livinglabs/earthquakes/, Click to view other curriculum aligned to this Performance Expectation, Finding Epicenters and Measuring Magnitudes Worksheet, Finding Epicenters and Measuring Magnitudes (docx), Finding Epicenters and Measuring Magnitudes (pdf), Finding Epicenters and Measuring Magnitudes Example Answers (docx), Finding Epicenters and Measuring Magnitudes Example Answers (pdf), Earthquakes Living Lab: FAQs about P Waves, S Waves and More, Seismic Waves: How Earthquakes Move Through the Earth, Earthquakes Living Lab: Designing for Disaster, http://www.teachengineering.org/livinglabs/index.php, https://www.newpathonline.com/api_player/enus_54_6304/LXX/index.html. 0000103591 00000 n 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. %PDF-1.5 % How does distance from the epicenter affect the S-P time interval? 15 Bill Nye - Earthquakes Worksheet Key Earthquakes occur when the big pieces of earth's crust, called plates, move a little. Every earthquake is recorded on numerous seismographs located in different directions. A minimum of three seismic stations is necessary to locate an epicenter. Locating An Earthquake Epicenter Lab Answers Thank you for reading Locating An Earthquake Epicenter Lab Answers . minutes = 6 minutes. To abbreviate, use the symbol M (a capital M, plain text, no sub/superscripts) expressed to the nearest 0.1. How might they use this information?