activity 4 locating an earthquake epicenter answer key activity 4 locating an earthquake epicenter answer key

Explains how to find an earthquake epicenter using at least three seismograph stations. 12), Analyze and interpret data about natural hazards using direct and indirect evidence See Answer. 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! 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. hbbd``b`$C`q9 X_$_g`bdxc`X 9 - Send activity 4 locating an earthquake epicenter worksheet answers via email, link, or fax. a project of D2L (www.achievementstandards.org). Shear wave from earthquake, moving slower than primary waves, through solid material only. %PDF-1.5 % Wikipedia, The Free Encyclopedia. HlRnQ?R\>BjK' To complete the activity, some prior . If the lag time were measured at a location closer to the epicenter, how would it compare Was there an initial quake followed by smaller quakes? Place a ruler (or straight edge) on the chart between the points you marked for the distance to the epicenter and the amplitude. %%EOF You can also download it, export it or print it out. Every year, earthquakes cause death and destruction worldwide. 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. 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"? For lower grades, just introduce the concepts of triangulation and the magnitude scale; a thorough understanding of P and S waves is not vital. Activity: Locating an Earthquake Epicenter Lecture 3 Damage from the earthquake was widespread, but the actual location of the earthquake (the epicenter) 0000055643 00000 n You will receive your score and answers at the end. 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. The distance is in kilometers. Short for "primary wave" or "pressure wave." 0000002094 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! (, Have any of you ever experienced an earthquake or know anyone who has? P wave: The first seismic wave of an 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 . The USGS and its partners monitor and report earthquakes, assess earthquake impacts and hazards, and . 0000053998 00000 n So the difference in the P- and S-wave arrival times determines the distance between the epicenter and a seismometer. One seismogram indicates the distance to the epicenter. For example, During an earthquake, seismic waves are sent all over the globe. Pwaves have the greatest velocity and reach theseismic station first. Locating Earthquake Epicenters ( Read ) | Earth Science Details. Of the four Earthquakes Living Lab seismic areas, choose the "Chile" box, as shown in Figure 3. The nations most famous fault is the San Andreas Fault, which runs along a north-south trend in southern California, and happens to run directly through Los Angeles. The living lab presents earthquake information through a focus on four active seismic areas and historic earthquakes in those areas. What is an earthquake? If a quake is far from the seismograph, the P-waves arrive long before the S-waves. Do you think we will someday be able to prevent earthquakes? Once three seismographs have been located, find the time interval between the arrival of the P-wave . ya{I;W@DgMN2:UtbT=*+cY1.8Vm(u3Zt"J @9TAjJH@H_F3n7\Srdw~gAR#JQGj`ueS! Short for "secondary wave" or "shear wave." Students also investigate which structural designs are most likely to survive an earthquake. Moment magnitude scale. The seismometers are shown as green dots. 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. minutes and P waves 8 minutes to 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. Solved Lab Exercise #2: Locating the Epicenter of an - Chegg Finding the Epicenter. Epicenter is the location on the surface of the Earth directly above where the earthquake starts. American Geosciences Institute. When the tension becomes too great, the fault slips, causing an earthquake. The American Geosciences Institute represents and serves the geoscience community by providing collaborative leadership and information to connect Earth, science, and people. 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. The period of P waves is shorter, than the period of surface waves. Figure 8. Accessibility StatementFor more information contact us atinfo@libretexts.orgor check out our status page at https://status.libretexts.org. seismogram. gov For online instructions and current fees click here. Use mathematical representations to support a claim regarding relationships among the frequency, wavelength, and speed of waves traveling in various media. 17 Station St., Ste 3 Brookline, MA 02445. Using online resources and simulations available through the Earthquakes Living Lab, students explore the consequences of subsurface ground type and building height on seismic d Seismographs are measuring devices designed by engineers and used by researchers to determine the locations and magnitudes of earthquakes. 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. What is the 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. How do we determine the epicenter of an earthquake? Use of the TeachEngineering digital library and this website constitutes acceptance of our Terms of Use and Privacy Policy. This is determined by the P-and S-wave arrival times. Geologists use seismic waves to locate an earthquake's epicenter. 0000007097 00000 n 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. PDF Locating an Epicenter Activity - Arkansas Geological Survey However, please review it for the specific setting, materials, students, and conventional safety precautions. THREE SEISMOGRAMS Seismogram A - New York, NY 1 minute 1. Develop a solution to a technological problem that has the least negative environmental and social impact. 0000008845 00000 n DOC Home - Westerville City Schools 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. In the ASN, standards are hierarchically structured: first by source; e.g., by state; within source by type; e.g., science or mathematics; 0000004224 00000 n P and Swaves are body waves and travelthrough the interior of the earth. longer or shorter). What was the lag time (in minutes) at this location? As the drum rotated, the 9 - (Grades 2. P and Swaves are body waves and travel, through the interior of the earth. minute apart, represent the passage of time Earthquakes & Volcanoes Test Review Answers. 0000001533 00000 n 1) Identify the general term for waves released from an earthquake. earthquake though). Students first triangulate the location of an earthquake's epicenter, then calculate its magnitude. consider a seismograph stationed 3, Earthquakes and Volcanoes. 0000000956 00000 n If a quake is far from the seismograph, the P-waves arrive long before the S-waves. 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. Practicing this technique, the students work several problems on a map of the US. 0000078100 00000 n Thus technology use varies from region to region and over time. %PDF-1.3 % Have students click on the Earthquakes Living Lab hyperlink in the top left in the earthquakes section. 0000006011 00000 n How does distance from the epicenter affect the S-P time interval? lag time. 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. 5 4. Legal. E}g7$i(=K)"aj%v]vPcYloi@X3noGX{[XucOgkdF.>Ym^fwrQf;8_Nok3w\;?n_Hhc?>k\o[%DgwJ'3d.lTqDy_aJw! To do this, have the students use, Find the epicenter of the earthquake on the map (. Figure 13.10). Point on Earth's surface directly above an earthquake's focus. 0000106240 00000 n 0000001562 00000 n It takes S waves 14. Direct student pairs to independently complete the tutorial/simulation to find an epicenter location via the triangulation method and compute the earthquake magnitude: The simulation directs students to look at three simplified seismograms from seismic stations in Chile (Talca, Santiago, Osorno) and select the correct measurements of the S-P intervals. within type by subtype, then by grade, etc. (Grades (5 minutes) Discuss how gathering information on epicenters can be applied. Locating An Earthquake Epicenter Lab Answer Key 0000001408 00000 n 92 0 obj <>/Filter/FlateDecode/ID[]/Index[83 25]/Info 82 0 R/Length 62/Prev 466624/Root 84 0 R/Size 108/Type/XRef/W[1 2 1]>>stream In order to determine the location of an earthquake epicenter, seismographsfrom at least three different places are needed for a particular event. The farther away the epicenter is, the greater the difference . In Figure 13.9, there is an example seismogram from a station that includes a minor earthquake. S-P interval: The time interval between the arrivals of P and S waves. Civil engineers, who design houses, apartment buildings, schools, skyscrapers, bridges, highways, tunnels, water treatment facilities, factories and other structures, may use this data to help them create safer structures that are less likely to sustain damage during earthquakes. 0000103591 00000 n [k0 |`2dGXGGGd00A(60P-e = F5n -f$ C 0000009174 00000 n 0000001746 00000 n As you may know, people have look numerous times for . What is the time lag for the Seattle, Washington, seismic station? HS]o01j6R0iMm4U=wL8]BE< Lab Activity Locating Epicenters Teaching Resources | TPT 0000004457 00000 n 500p;333aXb3 \a.1. Therefore, the lag Why might the triangulation method not always produce an exact point (other than your measurement errors)? 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. 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. 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. Seismographs - Keeping Track of Earthquakes | U.S. Geological Survey This is determined by the P-and S-wave arrival times. 87 0 obj <> endobj xref 87 28 0000000016 00000 n The three seismograms in this activity are unfi ltered station records from a single event that occurred on August 1, 1999. Tracings made at three separate seismic stations are needed to locate an earthquake epicenter. Students learn about factors that engineers take into consideration when designing buildings for earthquake-prone regions. A single recording station can only calculate distance, but not direction; to cover all possibilities, a complete circle is drawn around that station. !5(~q* (Grades 9 - 12). View Notes - Locating_an_epicenter_activity from SCIENCE Earth Scie at Toms River High North. We also acknowledge previous National Science Foundation support under grant numbers 1246120, 1525057, and 1413739. Earthquakes Living Lab: Finding Epicenters and Measuring Magnitudes ActivityWorksheet Example Answers 4 now big earthquakes are measured using the moment magnitude scale; both scales essentially rank the power (energy release) of the earthquake. 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. travel time for P waves. 0000001675 00000 n The point beneath Earth's surface where rock breaks under stress and causes an earthquake. and S waves to travel any distance up to The arrival of seismic waves will be recognized by an increase in amplitude look for a pattern change as lines get taller and more closely spaced (ex. HTAn earthquake. The USGS now uses the MMS to estimate magnitudes for all modern large earthquakes. As you read and complete the activity, take notes so you can complete the. In this activity, the epicenter of the earthquake is in the center of Los Angeles, CA. 12 Earthquake Location Lab Answer Key Full PDF - www.yvc.moeys.gov If you can't find an answer to your question, please contact us. 6.17: Locating Earthquake Epicenters - K12 LibreTexts This activity is designed around the Earthquakes Living Lab, a resource and online interface that uses real-time U.S. Geological Survey seismic data from around the world. 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. Locating_an_epicenter_activity - Activity4 - Course Hero farther from the epicenter of an earthquake? 1. Finding the Epicenter Determine the epicenter distance from three different seismographs. Focal Depth. 107 0 obj <>stream !D,X2:azTG)kPT~Mj 4>d w@O'. 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. Empirical evidence is required to differentiate between cause and correlation and make claims about specific causes and effects. Assess their understanding based on the thoroughness of their answers. Answer the following questions in the spaces provided. The lag time for any Subjects: Earth Sciences, General Science Grades: 5th - 8th Types: Activities, Laboratory Locating an Epicenter through Triangulation of Seismic Data- Remote/Hybrid/Live. 2. The vertical lines, spaced one Expert Answer. At least 3 earthquake recording stations are required to find the location of the earthquake epicenter. Activity 4 locating an earthquake epicenter answers: Fill out & sign 11 minutes elapsed between the first P wave and the last measurable surface wave. Type text, add images, blackout confidential details, add comments, highlights and more. When seismic data is collected from at least three different locations, it can be used to determine the epicenter by where it intersects. Make changes to the sample. Alignment agreement: Upload a document. approximate period of the surface waves in seconds? If you draw a circle on a map around three different seismographs where the radius of each is the distance from that station to the earthquake, the intersection of those three circles is the epicenter. Student exploration Graphing Skills SE Key Gizmos Explore Learning. triangulation: A method to determine exactly where an earthquake originates. long will it take, to the nearest 0. minutes, for the first P waves to travel from the epicenter to your station? Yw8SxGk}X3kfTfW& gk`41#'uf7"G\fsN4^8jC7[+%`qFLFKpFc inch = 500 km. 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. Sixty-seven people lost their lives, and property damage was estimated at $6 billion. After reading about earthquakes, open a new window to an Earthquake Simulator at, Follow the simulation instructions. I contacted the persons listed below to find out the location of the following people entitled to notice Name of Person Measure the difference in arrival times between the first shear (s) wave and the first compressional (p) wave, which can be interpreted from the seismogram. Seismic Waves. How are S and P waves used to determine how far away epicenters are? Material is sheared side to side, perpendicular to the direction of wave propagation. trailer <<0444DE89825047A1A483C62E98F50868>]>> startxref 0 %%EOF 114 0 obj <>stream 13 4 locating an earthquake epicenter geosciences libretexts . (, 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. Use mathematical representations of phenomena or design solutions to describe and/or support claims and/or explanations. H\0y PDF Lecture 3 Activity: Locating an Earthquake Epicenter 01. question 1 of 3. Solved ACTIVITY 2B Locating an Earthquake Figure 5 shows - Chegg 0000031066 00000 n Several thousand seismographs exist at locations around the planet, continuously measuring abnormalities in the Earth's movement. (Figure 3):. Hand out the worksheets to the groups and direct them to read through the instructions. Mark the first arrival of the swave on each seismogram. 61 33 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. Locating an Epicenter Activity - Arkansas Geological Survey Earthquakes and Seismic Waves - carlisleschools.org Divide the class into student pairs, and have them assemble at their computers with journals/paper and writing instruments. 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. 0000003254 00000 n The period of a wave is the time between two adjacent wave peaks. The wavelength and frequency of a wave are related to one another by the speed of travel of the wave, which depends on the type of wave and the medium through which it is passing. The epicenter of an earthquake can be found using the difference between the arrival of the Primary and Secondary waves. What data is used to determine magnitude? 13. 83 0 obj <> endobj Learn more How Can I Locate the Earthquake 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. 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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. There are two sets of data and maps to do this activity/ lab for than once. If your seismograph station is One seismogram indicates the distance to the epicenter. An earthquake is the violent movement of tectonic plates in the Earth's crust. PDF Finding Epicenters Lab Answer Key Lab Pdf Figure 1 is a simplified example of a EARTHQUAKES: Epicenter Determination and Seismic Waves First locate and mark the three seismic stations on the world map provided below. P wave. [N'. 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. A circle is drawn from each of the three different seismograph locations, where the radius of each circle is equal to the distance from that station to the epicenter. Students learn what causes earthquakes, how we measure and locate them, and their effects and consequences. Free K-12 standards-aligned STEM curriculum for educators everywhere. atrial depolarization. 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