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. by. Analyze and interpret data on natural hazards to forecast future catastrophic events and inform the development of technologies to mitigate their effects. The USGS now uses the MMS to estimate magnitudes for all modern large earthquakes. 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. 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 The magnitude determination is based on seismic data. Zip. In this 1-to-10 logarithmic scale, each succeeding level representing 10 times as much energy as the last. What are those limits? HTn0"H@w=s(vxk8OM1px-{$_!o5|CS7RPr#V(0CUa%ZkuT9t};D Jj=.9,z!#@n5YCu>R88tfFRX=iRK As you read and complete the activity, take notes so you can complete the. Great-circle arcs are drawn on the globe using the distance of the earthquake to the station as a radius. One seismogram indicates the distance to the epicenter. Richter magnitude scale: An earthquake measurement scale created in the 1930s to assign a single number to quantify the energy released during earthquakes. 01. 0000010002 00000 n activity illustrates how the epicenter of an earthquake is found. We have answers to the most popular questions from our customers. If a quake is far from the seismograph, the P-waves arrive long before the S-waves. If a quake is far from the seismograph, the P-waves arrive long before the S-waves. Objective Use data from seismograms to locate the epicenters of earthquakes. 0000001604 00000 n The seismometers are shown as green dots. Must engineers be content with mitigating disasters, instead of preventing them? Last modified July 18, 2012. 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. Continue the discussion with the following questions (or assign these questions as homework): Have student groups explore one or more of the other two regions (Southern California and Japan) provided in the Virtual Earthquake simulation. The simulation renders three circles on a map and directs students to find the epicenter. Earthquake Worksheet Answers Upload a document. 0000079769 00000 n farther from the epicenter of an earthquake? How does the lag time change as you get farther and The instrument detects and documents the intensity, direction and duration of ground vibrations, which are used to determine the epicenters and strength/magnitudes of earthquakes or other seismic events. Draw your signature, type it, upload its image, or use your mobile device as a signature pad. (5 minutes) Discuss how gathering information on epicenters can be applied. 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. EARTHQUAKES: Epicenter Determination and Seismic Waves First locate and mark the three seismic stations on the world map provided below. 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"? cCV&0Lw1~c\4QA!{q: N3\`Lccgb,x/if`WH3(\'q)Da'@ | endstream endobj 92 0 obj <>/Filter/FlateDecode/Index[57 4]/Length 20/Size 61/Type/XRef/W[1 1 1]>>stream What data is used to determine magnitude? Practicing this technique, the students work several problems on a map of the US. PDF Example Answers - TeachEngineering 0000009174 00000 n The lag time for any There are two sets of data and maps to do this activity/ lab for than once. 0000001861 00000 n Do you agree with this alignment? hb```f``Rl@ (l"`+uk?0.a~@6Vm;| G3f`75@v@Wz|A4#w9{(` ) 0000006984 00000 n 15 Bill Nye - Earthquakes Worksheet Key Earthquakes occur when the big pieces of earth's crust, called plates, move a little. The distance is in kilometers. What was the lag time (in minutes) at this location? Then from the same recordings they determine the earthquake's magnitude, an estimate of the amount of energy released during the earthquake. Choose an answer and hit 'next'. You will receive your score and answers at the end. What types of engineers might use this data the most? Entering the three maximum amplitudes generates a nomogram, a graphical device that simplifies the process of estimating magnitude from distance (determined earlier in the tutorial from the S-P interval process) and amplitude. gov For online instructions and current fees click here. 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. A. Seismic waves-waves generated by an earthquake, can move the ground forward and back- answers the question. Refer to the data table and use the difference in arrival times to determine the distance to the earthquake epicenter for Station 2. Develop a solution to a technological problem that has the least negative environmental and social impact. 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. 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. endstream endobj startxref Do you agree with this alignment? Assess their understanding based on the thoroughness of their answers. Figure 2. ACTIVITY 4.2B Locating an Earthquake Figure 4.5 shows - Chegg 0000004224 00000 n S waves. 0000098546 00000 n Hands-on Activity Earthquakes Living Lab: Finding Epicenters Thanks for your feedback! Thus technology use varies from region to region and over time. Many updates and improvements! Great exercise for Regents Earth Science. PDF Finding Epicenters Lab Answer Key Lab Pdf Solved Lab Exercise #2: Locating the Epicenter of an - Chegg from the epicenter will be 14 8. time for any point that is 3,000 miles Where the 3 circles intersect is the approximate location to the epicenter of the earthquake. They make a model of a seismographa measuring device that records an earthquake on a seismogram. When the tension becomes too great, the fault slips, causing an earthquake. 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Finding the Epicenter Determine the epicenter distance from three different seismographs. 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. Figure 1 is a simplified example of a Please answer the following questions using the earthquake video - shake, shake, shake. 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. The spot where those three circles intersect is the epicenter (Figure 13.12). Lab Activity Locating Epicenters Flashcards | Quizlet 1. Earthquakes and Volcanoes. Mr Gneiss. 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." Locating An Earthquake Epicenter Lab Answer Key ' 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 Also called seismometer. 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. The Earthquakes Living Lab gives students the chance to track earthquakes across the planet and examine where, why and how they are occurring. Even though the scale formulae are different, MMS retains the familiar continuum of magnitude values defined by the older scale. trailer <<0444DE89825047A1A483C62E98F50868>]>> startxref 0 %%EOF 114 0 obj <>stream Locating the Epicenter of an Earthquake - SE Asia a foldable activity, slide presentation to guide reading, and an answer key! locating the epicenter of an earthquake activity - TeachersPayTeachers 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. Next, have student groups answer the eight questions in the. How does distance from the epicenter affect the S-P time interval? The USGS Earthquake Hazards Program is part of the National Earthquake Hazards Reduction Program (NEHRP), established by Congress in 1977, and the USGS Advanced National Seismic System (ANSS) was established by Congress as a NEHRP facility. If less precision is desired, precede M with a tilde, such as "M ~7" or "magnitude ~6.8.". 0000005149 00000 n 2. Another method of locating an earthquake is to use the P-wave arrival-time minus origin-time (P - O) interval instead of distance. /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?? Point on Earth's surface directly above an earthquake's focus. For lower grades, just introduce the concepts of triangulation and the magnitude scale; a thorough understanding of P and S waves is not vital. See Answer. One seismogram indicates the distance to the epicenter. (Figure 3):. 0000055643 00000 n minute apart, represent the passage of time Civilization and its Discontents (Sigmund Freud), Educational Research: Competencies for Analysis and Applications (Gay L. R.; Mills Geoffrey E.; Airasian Peter W.), Brunner and Suddarth's Textbook of Medical-Surgical Nursing (Janice L. Hinkle; Kerry H. Cheever), Psychology (David G. Myers; C. Nathan DeWall), The Methodology of the Social Sciences (Max Weber), Business Law: Text and Cases (Kenneth W. Clarkson; Roger LeRoy Miller; Frank B. Reading Strategy. If a quake is near the seismograph, the S-waves arrive shortly after the P-waves. Graphs, charts, and images can be used to identify patterns in data. 0000106240 00000 n Type text, add images, blackout confidential details, add comments, highlights and more. It takes S waves 14. As you may know, people have look numerous times for . (Source: USGS, Wikipedia). The farther a station is from the 0000000016 00000 n S wave: The second seismic wave of an earthquake. waves from a distant earthquake. hb```b````e``n`d@ A 'EF''oquE"ky#:}m;9JmkPt~=unFHy&|X:70 vILZ*|%6mD! Lab 8 - earthquake lab - Lab: Locating the Epicenters of Earthquakes Run through the investigation yourself and record the data, just to see how long it takes. Edit your locating an earthquake epicenter worksheet answers online. Using historical seismographs, engineers forecast the strength or magnitude of earthquakes and make predictions and determine building codes and safety protocols. Through the online Earthquakes Living Lab, student pairs explore various types of seismic waves and the differences between shear waves and compressional waves. Figure 2 is a seismic wave travel-time $8.25. Place a ruler (or straight edge) on the chart between the points you marked for the distance to the epicenter and the amplitude. Lab Lesson 4 - Lab Lesson 4: Earthquakes and Seismology, A minimum of three seismic stations is necessary to locate an epicenter. All rights reserved. In a concluding class discussion, have groups share their ideas about engineering and one new thing they learned about earthquakes. For this activity, select the "Chile" box. Describe the process of triangulation to locate an epicenter. %PDF-1.3 % : an American History (Eric Foner), Principles of Environmental Science (William P. Cunningham; Mary Ann Cunningham), Forecasting, Time Series, and Regression (Richard T. O'Connell; Anne B. Koehler), Chemistry: The Central Science (Theodore E. Brown; H. Eugene H LeMay; Bruce E. Bursten; Catherine Murphy; Patrick Woodward), Biological Science (Freeman Scott; Quillin Kim; Allison Lizabeth), Campbell Biology (Jane B. Reece; Lisa A. Urry; Michael L. Cain; Steven A. Wasserman; Peter V. Minorsky), How many minutes elapsed between the arrival of the first P wave and. a project of D2L (www.achievementstandards.org). 13. miles from the epicenter of an Do you think we will someday be able to prevent earthquakes? Success is figuring out that the estimated magnitude is 5.9. 0000001736 00000 n 0000004060 00000 n Answer Key: Lab 5 Earthquakes - Find People EARTHQUAKES: Epicenter Determination and Seismic Waves . 0000001408 00000 n Have students click on the Earthquakes Living Lab hyperlink in the top left in the earthquakes section. Richter scale Method of earthquake measurement based on the amplitude of seismic . Send activity 4 locating an earthquake epicenter worksheet answers via email, link, or fax. Shear wave from earthquake, moving slower than primary waves, through solid material only. The three seismograms in this activity are unfi ltered station records from a single event that occurred on August 1, 1999. A.45 seconds B.50 seconds C.55 seconds D.65 seconds Answer Key: D 0000001143 00000 n minutes and P waves 8 minutes to PDF ActivityEarthquake Location* - Cascadia Earthscope Earthquake and Triangulation is required to determine exactly where it happened. velocity, amplitude, and frequency of the moment magnitude scale: Similar to the Richter scale, but replacing its use starting in the 1970s for more accuracy in measuring big earthquakes (magnitudes > 3.5) from greater distances. 9 - earthquake. The spot where those three circles intersect is the epicenter (Figure 13.12). 0000004769 00000 n 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. 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. Accessed December 11, 2013. http://earthquake.usgs.gov/aboutus/docs/020204mag_policy.php. The epicenter is the point directly above it at the surface of the Earth. hWmo9+[+UH EkNB|6YiaVJ=cRh7{T1R,5LI1$K=s)XR&87@&$LTPLutlcyNuzjf--\?qaXZM&HM.Eg"HnTqSWqN0&~2kf0 Md|d&:zhe)7I? Subject Areas: The real-world earthquake data is viewable via a graphical interface using a scaling map. To locate the epicenter of the earthquake, seismologists use the . 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 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. In order to determine the location of an earthquake epicenter, seismographsfrom at least three different places are needed for a particular event. How does the period of the P waves compare to the period of the surface waves? Why might the triangulation method not always produce an exact point (other than your measurement errors)? Last updated November 26, 2013. Share with Classes. PDF Page - 1 Lab 08 - Seismology - Locating the Epicenter of an Earthquake long will it take, to the nearest 0. minutes, for the first P waves to travel from the epicenter to your station? Use the process of triangulation to locate an earthquake's epicenter. DOC Home - Westerville City Schools In Figure 13.9, there is an example seismogram from a station that includes a minor earthquake. PDF. Several thousand seismographs exist at locations around the planet, continuously measuring abnormalities in the Earth's movement. %PDF-1.4 % Use Figure 5 and the travel-time graph in Figure 4 to determine . 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. Read through the sections What Is Seismology and What Are Seismic Waves?, Where Do Earthquakes Happen?, and Why Do Earthquakes Happen? to answer the following questions: What is the difference between S and P waves? You can also download it, export it or print it out.