activity 4 locating an earthquake epicenter answer key

Finding the epicenter of an Earthquake by Ah - Ha Lessons 5.0 (1) $3.00 PDF Activity This lesson teaches the student the process scientists use to locate the epicenter of an EQ. 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 minutes = 6 minutes. 9 - minutes? Locating An Earthquake Epicenter Lab Answers Thank you for reading Locating An Earthquake Epicenter Lab Answers . 0000030240 00000 n Add to Library. 0000115324 00000 n The USGS now uses the MMS to estimate magnitudes for all modern large earthquakes. 0000001396 00000 n and S waves depends on the distance from the epicenter of the answer the following question. The LibreTexts libraries arePowered by NICE CXone Expertand are supported by the Department of Education Open Textbook Pilot Project, the UC Davis Office of the Provost, the UC Davis Library, the California State University Affordable Learning Solutions Program, and Merlot. 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. *The NGSS logo is a registered trademark of WestEd. 0000002840 00000 n Epicenter is the location on the surface of the Earth directly above where the earthquake starts. A little under 30 seconds, maybe around 26 seconds. Students also investigate which structural designs are most likely to survive an earthquake. A. Seismic waves-waves generated by an earthquake, can move the ground forward and back- answers the question. Engineers first determine where earthquakes are likely to occur, and how severe they are likely to be. Encourage them to explore all of the Earthquakes Living Lab as they complete the worksheet. different types of seismic waves. 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. inch = 500 km. Learn more How Can I Locate the Earthquake Epicenter? Download. Earthquakes and Volcanoes. 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. It is slower than the same earthquake's P wave and cannot travel through liquids. 0000004457 00000 n m>r/Q[6 1. Yw8SxGk}X3kfTfW& gk`41#'uf7"G\fsN4^8jC7[+%`qFLFKpFc Wikipedia, The Free Encyclopedia. How does the lag time change as you get farther and HTAn After this activity, students should be able to: Each TeachEngineering lesson or activity is correlated to one or more K-12 science, 0000004224 00000 n The spot where those three circles intersect is the epicenter (Figure 13.12). waves from a distant earthquake. 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 . 0000002250 00000 n 0000002507 00000 n One seismogram indicates the distance to the epicenter. seismograph: An instrument that measures motions of the ground, including those of seismic waves generated by earthquakes. Next, have student groups answer the eight questions in the. By looking at the time between the arrivals of the P- and S-waves, one can determine the distance to the earthquake from that station, with longer time intervals indicating longer distance. Make arrangements so that each student group has a computer with Internet access. In order to determine the location of an earthquake epicenter, seismographsfrom at least three different places are needed for a particular event. It's a logarithmic scale from 1 to 10 with each succeeding level representing 10 times as much energy as the last. Figure 2 is a seismic wave travel-time miles from the epicenter of an hb```b````e``n`d@ A 'EF''oquE"ky#:}m;9JmkPt~=unFHy&|X:70 vILZ*|%6mD! Accessed December 11, 2013. http://www.sciencecourseware.com/virtualearthquake/, USGS Earthquake Magnitude Policy (implemented on January 18, 2002). The calculated distance from each seismometer to the earthquake is shown as a circle. Seismic stations detect earthquakes by the tracings made on seismographs. A.45 seconds B.50 seconds C.55 seconds D.65 seconds Answer Key: D The moment magnitude scale (MMS) was developed in the 1970s as a modification of the Richter scale and is better for measuring big earthquakes but less good for small ones. (Source: USGS, Wikipedia). 0000033429 00000 n 9 - 0000002658 00000 n Accessed December 11, 2013. http://en.wikipedia.org/wiki/Moment_magnitude_scale, Novak, Gary. Facility Name Busine Child ren Information Child Name C. Child Social Security Number Type of Case being filed - Check only one category. Earthquakes Living Lab: Finding Epicenters & Measuring Magnitudes. Finally, the location of the 3 seismographs are placed on a map and the distance to the epicenter is used to draw a circle with an origin at each seismograph and a radius equal to the distance to the epicenter as taken from each seismogram. (Source: USGS, Wikipedia). 0000078169 00000 n Make changes to the sample. In the ASN, standards are hierarchically structured: first by source; e.g., by state; within source by type; e.g., science or mathematics; Three seismographs are needed. epicenter: A point on the Earth's surface that is directly above the place where the underground forces of an earthquake originate. 0000005081 00000 n Locating Earthquake Epicenter Lab Answer Key buysms de. located 1,000 miles from the (Grades What is an earthquake? At least 3 earthquake recording stations are required to find the location of the earthquake epicenter. 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. 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. How does the Mad Scientist. approximate period of the surface waves in seconds? 0000001604 00000 n from the epicenter will be 14 8. This is determined by the P-and S-wave arrival times. See Answer. S wave: The second seismic wave of an earthquake. You learned that seismologists determine the distance to the earthquake epicenter using the difference between S and P wave arrival times. These distances are determined using a travel-time curve, which is a graph of Pand S-wave arrival times (see Figure 13.11). 61 0 obj <> endobj xref Make an overhead copy of each of the handouts. endstream endobj 84 0 obj <> endobj 85 0 obj <> endobj 86 0 obj <>stream An earthquake is the violent movement of tectonic plates in the Earth's crust. Activity 4: Locating an Earthquake Epicenter Examining Seismograms The three basic types of seismic wave generated by an earthquake at its focus are Pwaves, Swaves, and Surface waves. You will receive your score and answers at the end. endstream endobj startxref %PDF-1.4 % In order to determine the location of an earthquake epicenter, seismographs from at least three different places are needed for a particular event. d>(ZvO= Develop a solution to a technological problem that has the least negative environmental and social impact. locate and label the epicenter of the earthquake on this map. hbbd``b`$C`q9 X_$_g`bdxc`X U.S. Geological Survey, U.S. Department of the Interior. hb```f``Rl@ (l"`+uk?0.a~@6Vm;| G3f`75@v@Wz|A4#w9{(` ) 0000079769 00000 n 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). Student exploration Graphing Skills SE Key Gizmos Explore Learning. 6. The American Geosciences Institute represents and serves the geoscience community by providing collaborative leadership and information to connect Earth, science, and people. How does the period of the P waves compare to the period of the surface waves? Epicenter Location on Earth's surface directly above the focus of the earthquake 5. (Figure 3):. Answer Key: Lab 5 Earthquakes - Find People EARTHQUAKES: Epicenter Determination and Seismic Waves . X!.43p2t!}SLx-3z.KN4X+H\+vk? 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. farther from the epicenter of an earthquake? (, Have any of you ever experienced an earthquake or know anyone who has? velocity, amplitude, and frequency of the Focal Depth. Introduction: Before student pairs look at the Earthquakes Living Lab, direct them to complete the Engage section of the Finding Epicenters and Measuring Magnitudes Worksheet, which asks them to apply any prior knowledge and/or speculate as to what the Richter magnitude scale is and what an epicenter is. 13. Have students turn in their answers for the Explain portion of the worksheet. 12), computer or other device with Internet access, journal or writing paper for each student. The hypocenter is the point within the earth where an earthquake rupture starts. 5. focus - the point within Earth where an earthquake originates. In the U.S., earthquake measurements under the MMS (those of magnitude 3.5 or higher) are still commonly erroneously referred to by the general public and media as being on the Richter scale, due to more familiarity with the Richter scale. 87 0 obj <> endobj xref 87 28 0000000016 00000 n The Richter scale was created in the 1930s to assign a single number to quantify the energy released during earthquakes. Pwaves have the greatest velocity and reach theseismic station first. 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Students learn about factors that engineers take into consideration when designing buildings for earthquake-prone regions. ' endstream endobj 69 0 obj <> endobj 70 0 obj [85 0 R] endobj 71 0 obj <> endobj 72 0 obj <> endobj 73 0 obj <>stream So the difference in the P- and S-wave arrival times determines the distance between the epicenter and a seismometer. When the tension becomes too great, the fault slips, causing an earthquake. The travel-time graph Use this information to complete the following. earthquake though). In this 1-to-10 logarithmic scale, each succeeding level representing 10 times as much energy as the last. Type text, add images, blackout confidential details, add comments, highlights and more. important in helping seismologists determine the epicenter of the earthquake. This investigation is considered generally safe to do with students. Thanks for your feedback! follow our easy steps to get your lab activity locating epicenters answer key well prepared rapidly choose the template in the library enter all necessary information in the required llable areas the 12), Evaluate ways that technology can impact individuals, society, and the environment. We have answers to the most popular questions from our customers. Accessed December 11, 2013. http://earthquake.usgs.gov/aboutus/docs/020204mag_policy.php. 0000004769 00000 n PS: We do not share personal information or emails with anyone. Students learn how engineers build shake tables that simulate the ground motions of the Earth caused by seismic waves in order to test the seismic performance of buildings. (, 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. ya{I;W@DgMN2:UtbT=*+cY1.8Vm(u3Zt"J @9TAjJH@H_F3n7\Srdw~gAR#JQGj`ueS! In Figure 13.9, there is an example seismogram from a station that includes a minor earthquake. Figure 1 is a simplified example of a Triangulation and Magnitude: Student pairs complete the worksheet, which includes following a tutorial/simulation accessed through the Earthquakes Living Lab. Students learn what causes earthquakes, how we measure and locate them, and their effects and consequences. What are those limits? 0000008088 00000 n 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). 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. Direct students to finish the activity by completing the. Also called seismometer. The simulation renders three circles on a map and directs students to find the epicenter. Section A - Operator Information 1. The point beneath Earth's surface where rock breaks under stress and causes an earthquake. Mr Gneiss. Place a ruler (or straight edge) on the chart between the points you marked for the distance to the epicenter and the amplitude. To do this, have the students use, Find the epicenter of the earthquake on the map (.

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