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HtA1D41`s(GME$Ke*YdEOYf2-:r. Yw8SxGk}X3kfTfW& gk`41#'uf7"G\fsN4^8jC7[+%`qFLFKpFc 13.4: Locating an Earthquake Epicenter - Geosciences LibreTexts All rights reserved. 9 - /g$=#!$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?? hb```b````e``n`d@ A 'EF''oquE"ky#:}m;9JmkPt~=unFHy&|X:70 vILZ*|%6mD! !D,X2:azTG)kPT~Mj 4>d w@O'. Please answer the following questions using the earthquake video shake, shake, shake. In order to determine the location of an earthquake epicenter, seismographsfrom at least three different places are needed for a particular event. Learn more How Can I Locate the Earthquake Epicenter? (Source: USGS, Wikipedia). 0000002383 00000 n 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"? The hypocenter is the point within the earth where an earthquake rupture starts. 4. Section 8.1 What Is an Earthquake? velocity, amplitude, and frequency of the Objective Use data from seismograms to locate the epicenters of earthquakes. 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. Locating an Earthquake's Epicenter - American Geosciences Institute Pwaves have the greatest velocity and reach the, seismic station first. P and Swaves are body waves and travel, through the interior of the earth. 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. Hand out the worksheets to the groups and direct them to read through the instructions. Some places are more prone to earthquakes than others. For example, the western United States has earthquakes more frequently and on a larger scale than the eastern part of the country. PS: We do not share personal information or emails with anyone. Scientists use triangulation to find the epicenter of an earthquake. What is an earthquake? ACTIVITY 4.2B Locating an Earthquake Figure 4.5 shows - Chegg As the drum rotated, the farther from the epicenter of an earthquake? 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. Locating an Epicenter through Triangulation of Seismic Data- Remote/Hybrid/Live. Lab Exercise #2: Locating the Epicenter of an Earthquake In this lab exercise, you will locate the epicenter of an earthquake. Now on the main page of the Earthquakes Living Lab website (see Figure 2), note the featuring of four active seismic areas and the mapping of real-time and current data from earthquakes happening around the world. 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. 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. HlRnQ?R\>BjK' Locating an Epicenter Activity - Arkansas Geological Survey 2. Where the 3 circles intersect is the approximate location to the epicenter of the earthquake. Activity4:LocatinganEarthquakeEpicenter Objectives:Ifyoucompletealltheproblems,youshouldbeableto: Identif During an earthquake, seismic waves are sent all over the globe. EARTHQUAKES: Epicenter Determination and Seismic Waves First locate and mark the three seismic stations on the world map provided below. 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. 17 Station St., Ste 3 Brookline, MA 02445. question 1 of 3. A circle with a radius of the distance to the quake can be drawn. 5 4. The American Geosciences Institute represents and serves the geoscience community by providing collaborative leadership and information to connect Earth, science, and people. PDF Finding Epicenters Lab Answer Key Lab Pdf They make a model of a seismographa measuring device that records an earthquake on a seismogram. 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. Travel-time graphDistance in Miles, Copyright 2023 StudeerSnel B.V., Keizersgracht 424, 1016 GC Amsterdam, KVK: 56829787, BTW: NL852321363B01, seismogram. The USGS now uses the MMS to estimate magnitudes for all modern large earthquakes. https://people.wou.edu/~taylors/gs104/lab5key.pdf Locating Earthquake Epicenters | CK-12 Foundation Apr 8, 2020 . There are two sets of data and maps to do this activity/ lab for than once. 13. Triangulation and Magnitude: Student pairs complete the worksheet, which includes following a tutorial/simulation accessed through the Earthquakes Living Lab. distance = travel time for S waves View Notes - Locating_an_epicenter_activity from SCIENCE Earth Scie at Toms River High North. Collect any giveaways for the students, such as earthquake posters or plate tectonic fliers. ya{I;W@DgMN2:UtbT=*+cY1.8Vm(u3Zt"J @9TAjJH@H_F3n7\Srdw~gAR#JQGj`ueS! 0000002840 00000 n 0000031066 00000 n Key Facts & Information. Make arrangements so that each student group has a computer with Internet access. (Grades 9 - 12). endstream endobj 84 0 obj <> endobj 85 0 obj <> endobj 86 0 obj <>stream 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. approximate period of the surface waves in seconds? How does the Mad Scientist. 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? epicenter of an earthquake, how 0000000016 00000 n Sixty-seven people lost their lives, and property damage was estimated at $6 billion. How many minutes elapsed between the arrival of the first P wave and the last measurable Tracings made at three separate seismic stations are needed to locate an earthquake epicenter. (i. 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Lab Lesson 4 - Lab Lesson 4: Earthquakes and Seismology, Epicenter is the location on the surface of the Earth directly above where the earthquake starts. This section explains what earthquakes and faults are and what causes earthquakes. surface wave? 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. How Can I Locate the Earthquake Epicenter? | Michigan Technological Three seismographs are needed. To abbreviate, use the symbol M (a capital M, plain text, no sub/superscripts) expressed to the nearest 0.1. (Grades Review their answers to assess their base knowledge of the subject matter. This investigation is considered generally safe to do with students. Free K-12 standards-aligned STEM curriculum for educators everywhere. 0000003966 00000 n 83 0 obj <> endobj trailer <<0444DE89825047A1A483C62E98F50868>]>> startxref 0 %%EOF 114 0 obj <>stream Describe what the "magnitude" of an earthquake is. (Figure 3):. 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. In Figure 13.9, there is an example seismogram from a station that includes a minor earthquake. epicenter: A point on the Earth's surface that is directly above the place where the underground forces of an earthquake originate. 0000004224 00000 n Every year, earthquakes cause death and destruction worldwide. 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. 0000001861 00000 n 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. Choose an answer and hit 'next'. Record your answer from Lab Exercise #2, Step 1. 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. Solved Lab Exercise #2: Locating the Epicenter of an - Chegg What data is used to determine magnitude? Notify the classroom teacher of technology needs (overhead projector). Thus technology use varies from region to region and over time. %PDF-1.5 % Was there an initial quake followed by smaller quakes? Several thousand seismographs exist at locations around the planet, continuously measuring abnormalities in the Earth's movement. The magnitude is the logarithm of the amplitude of the ground wave. What are those limits? Thanks for your feedback! PDF EARTHQUAKE EPICENTER LOCATION EXERCISE - Idaho geology Earthquakes occur along faults, which are cracks in the Earths crust that build tension. PDF Locating an Epicenter Activity - Arkansas Geological Survey The process is called triangulation. A.45 seconds B.50 seconds C.55 seconds D.65 seconds Answer Key: D American Geosciences Institute. 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. 0000006011 00000 n Add to FlexBook Textbook. 12), Analyze and interpret data about natural hazards using direct and indirect evidence Millions of people witnessed the motion of the earthquake on television. Therefore, the lag [N'. If your seismograph station is 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 magnitude determination is based on seismic data. 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Figure 8. When an earthquake strikes, P waves arrive at a seismograph rst and S waves next. 87 0 obj <> endobj xref 87 28 0000000016 00000 n epicenter, the longer the lag time measured S-P interval: The time interval between the arrivals of P and S waves. 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. 3000 miles. 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. Graphs, charts, and images can be used to identify patterns in data. (, 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. Answer the following questions in the spaces provided. In this investigation, participants will understand that S and P waves are used to find the epicenter of an earthquake by using seismograph data to triangulate an epicenter. Short for "primary wave" or "pressure wave." %%EOF To accurately locate an earthquake epicenter, records from three. 0 500 1000 1500 2000 2500 3000 What about P waves? To locate the epicenter of the earthquake, seismologists use the . Ask students what fault they think caused this earthquake. Do you agree with this alignment? H\0y (Grades 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! locate and label the epicenter of the earthquake on this map. (5 minutes) Discuss how gathering information on epicenters can be applied. Draw your signature, type it, upload its image, or use your mobile device as a signature pad. If you complete all the problems, you should be able to: Identify P, S, and surface waves on a simple seismogram. Q(_?!6YV3B"\'9:4gTp*7^/P.X!skfkJ)1nG#a\{UD+iWM+ rQR]9SFTUPlM#"c:;tnsQPlu]Uyv?Ge}W;8cMA/x}'5clES~+}S+N7}wQ:/BkmI^" 5oqaBC[TRjq4.e}F:SQg{=u\xcg~EaZKReoC?oahJ` 'w endstream endobj 77 0 obj <>stream However, please review it for the specific setting, materials, students, and conventional safety precautions. We additionally manage to pay for . The three seismograms in this activity are unfi ltered station records from a single event that occurred on August 1, 1999. How are S and P waves used to determine how far away epicenters are? You learned that seismologists determine the distance to the earthquake epicenter using the difference between S and P wave arrival times. graph. 12 Earthquake Location Lab Answer Key Full PDF - www.yvc.moeys.gov 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. 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 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