0000005081 00000 n Share with Classes. 0000010002 00000 n 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. 100 km 4.1 km/s 24.4 s; Finding the epicenter (continued) data table analyze and conclude answer the following questions on a separate sheet of paper. to the lag time measured at this location? 0000078169 00000 n 0000003254 00000 n Place a ruler (or straight edge) on the chart between the points you marked for the distance to the epicenter and the amplitude. 0000004769 00000 n ' 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 12 Earthquake Location Lab Answer Key (PDF) - skislah.edu Web12-earthquake-location-lab-answer-key 1/1 Downloaded from skislah.edu.my on February 15, 2023 by guest 12 Earthquake Location Lab Answer Key Right here, we have countless ebook 12 Earthquake Location Lab Answer Key and collections to check out. The distance to the earthquake epicenter is then determined using the "Earthquake P-Wave and S-Wave Travel Time" graph. How are S and P waves used to determine how far away epicenters are? Earthquakes and Seismic Waves Key Concepts . earthquake though). Figure 2 is a seismic wave travel-time Use this information to complete the following. What data is used to determine magnitude? Finding the epicenter worksheet answer key. Thanks for your feedback! 4. fault - a fracture in Earth's crust where the rocks on either side have moved. Key Facts & Information. epicenter: A point on the Earth's surface that is directly above the place where the underground forces of an earthquake originate. Make arrangements so that each student group has a computer with Internet access. lag time. 0000001675 00000 n Geologists use seismic waves to locate an earthquake's epicenter. Click for facts and worksheets in PDF! 0000008088 00000 n 9 - If a quake is far from the seismograph, the P-waves arrive long before the S-waves. In this 1-to-10 logarithmic scale, each succeeding level representing 10 times as much energy as the last. and S waves depends on the distance from the epicenter of the answer the following question. The simulation renders three circles on a map and directs students to find the epicenter. HlRnQ?R\>BjK' A minimum of three seismic stations is necessary to locate an epicenter. In Figure 13.9, there is an example seismogram from a station that includes a minor earthquake. and S waves to travel any distance up to 107 0 obj <>stream Expert Answer. 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-1.4 % (, Have any of you ever experienced an earthquake or know anyone who has? 1,000 miles from the epicenter of an earthquake? Figure 1 is a simplified example of a The earthquake occurred somewhere along that circle. Ch Person/Attorney Filing: - Superior Court - Maricopa County - superiorcourt maricopa. Thanks for your feedback! $8.25. triangulation: A method to determine exactly where an earthquake originates. Graphs, charts, and images can be used to identify patterns in data. Seismic stations detect earthquakes by the tracings made on seismographs. As the drum rotated, t, pen recorded the arrival of P, S, and surface, between arrival of P and S waves is called, epicenter, the longer the lag time measured, velocity, amplitude, and frequency of the. By looking at the time between the arrivals of the P- and S-waves, one can determine the distance to the earthquake from that station, with longer time intervals indicating longer distance. 0000001562 00000 n Please answer the following questions using the earthquake video shake, shake, shake. Finally, the location of the 3 seismographs are placed on a map and the distance to the epicenter is used to draw a circle with an origin at each seismograph and a radius equal to the distance to the epicenter as taken from each seismogram. Accessed December 11, 2013. http://earthquake.usgs.gov/aboutus/docs/020204mag_policy.php. 0000001396 00000 n The epicenter is the point directly above it at the surface of the Earth. Since the 1970s, the use of the Richter magnitude scale has largely been replaced in the scientific community by the moment magnitude scale (MMS). HtA1D41`s(GME$Ke*YdEOYf2-:r. 9 - earthquakes. %%EOF Wikipedia, The Free Encyclopedia. 2. Subjects: Earth Sciences, General Science Grades: 5th - 8th Types: Activities, Laboratory Focus. As the drum rotated, the HTn0MmcHCB determine the epicenter using the S P (S minus P) method. The longer the time between the arrival of the P-wave and S-wave, the farther away is the epicenter. %PDF-1.3 % 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"? 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 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. As you read and complete the activity, take notes so you can complete the. 0000005149 00000 n Several thousand seismographs exist at locations around the planet, continuously measuring abnormalities in the Earth's movement. The real-world earthquake data is viewable via a graphical interface using a scaling map. Describe the logarithmic nature of the earthquake magnitude scale. 0000002250 00000 n Do you agree with this alignment? locate and label the epicenter of the earthquake on this map. longer or shorter). It takes S waves 14. Epicenter Location on Earth's surface directly above the focus of the earthquake 5. 0000004224 00000 n ya{I;W@DgMN2:UtbT=*+cY1.8Vm(u3Zt"J @9TAjJH@H_F3n7\Srdw~gAR#JQGj`ueS! /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$II'y ??O's^3@[{*{VT?nsNS!ilq]mFO?? Assess their understanding based on the thoroughness of their answers. Scientists use triangulation to find the epicenter of an earthquake. gov For online instructions and current fees click here. distance = travel time for S waves 0000001408 00000 n (Figure 3):. What is the time lag for the Seattle, Washington, seismic station? miles from the epicenter of an Engineers first determine where earthquakes are likely to occur, and how severe they are likely to be. So the difference in the P- and S-wave arrival times determines the distance between the epicenter and a seismometer. Before looking at the Earthquakes Living Lab, have pairs complete the, Then guide the teams to the Earthquakes Living Lab via the living lab website at. If a quake is near the seismograph, the S-waves arrive shortly after the P-waves. Students also investigate which structural designs are most likely to survive an earthquake. HTn0"H@w=s(vxk8OM1px-{$_!o5|CS7RPr#V(0CUa%ZkuT9t};D Jj=.9,z!#@n5YCu>R88tfFRX=iRK 0000001736 00000 n Also called seismometer. Empirical evidence is required to differentiate between cause and correlation and make claims about specific causes and effects. I also will take them through the general process of how find the difference in arrival times of p- and s-waves can be used to find a distance to an earthquake and how using data from 3 seismograph stations is used to locate the epicenter. The magnitude determination is based on seismic data. distance from transducer to the focal point. 9 - How does distance from the epicenter affect the S-P time interval? Based on your answers to the previous question, what is the lag time for locations that are The Richter scale was created in the 1930s to assign a single number to quantify the energy released during earthquakes. Accessed December 11, 2013. http://en.wikipedia.org/wiki/Moment_magnitude_scale, Novak, Gary. Make changes to the sample. Answer Key: Lab 5 Earthquakes - Find People EARTHQUAKES: Epicenter Determination and Seismic Waves . Y$Kr;V6[;Dq vg~cx:A[^jCssupwD endstream endobj 80 0 obj <> endobj 81 0 obj <>stream One seismogram indicates the distance to the epicenter. An earthquake is the violent movement of tectonic plates in the Earth's crust. How is the magnitude of an earthquake determined? These natural disasters may be mitigated, however, by insightful and creative engineering. use slide 6 and answer key slide 7 how can i locate the earthquake epicenter michigan web the epicenter of the earthquake is somewhere on the edge of that circle do the 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. Locating the epicenter of an earthquake worksheet answer key, locating the epicenter of an earthquake worksheet pdf, chapter 7 lab 1 locating epicenters answer key, how many seismographs are needed to locate the epicenter of an earthquake. Virtual Earthquake (tutorial/simulation) 1996. a project of D2L (www.achievementstandards.org). Three seismographs are needed. Learn from this informative and clear video.Brought you by award-winning Once each student has constructed his or her circle on the map, mark with an X, the epicenter of the earthquake. U.S. Geological Survey, U.S. Department of the Interior. A. Seismic waves-waves generated by an earthquake, can move the ground forward and back- answers the question. 0000004060 00000 n Using historical seismographs, engineers forecast the strength or magnitude of earthquakes and make predictions and determine building codes and safety protocols. Make an overhead copy of each of the handouts. 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. Conclude the activity with a class discussion (and perhaps homework questions) to share ideas and answers, as described in the Assessment section. 9 - aqmd. Section 8.1 What Is an Earthquake? How do we determine the epicenter of an earthquake? If your seismograph station is hb```f``Rl@ (l"`+uk?0.a~@6Vm;| G3f`75@v@Wz|A4#w9{(` ) What did it feel like? The point where your ruler crosses the middle line on the chart marks the magnitude (strength) of the earthquake. Have students turn in their answers for the Explain portion of the worksheet. Use mathematical representations of phenomena or design solutions to describe and/or support claims and/or explanations. For example, Must engineers be content with mitigating disasters, instead of preventing them? *The NGSS logo is a registered trademark of WestEd. Then from the same recordings they determine the earthquake's magnitude, an estimate of the amount of energy released during the earthquake. 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. long will it take, to the nearest 0. minutes, for the first P waves to travel from the epicenter to your station? The period of a wave is the time between two adjacent wave peaks. Mark the first arrival of the swave on each seismogram. 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