Most of these earthquakes are small tremors that cant be felt by people, but occasionally an earthquake occurs on a large magnitude that causes millions of dollars in property damage and kills hundreds to thousands of people. 0000001978 00000 n Accessed December 11, 2013. http://www.sciencecourseware.com/virtualearthquake/, USGS Earthquake Magnitude Policy (implemented on January 18, 2002). by. You learned that seismologists determine the distance to the earthquake epicenter using the difference between S and P wave arrival times. Answer the following questions in the spaces provided. E}g7$i(=K)"aj%v]vPcYloi@X3noGX{[XucOgkdF.>Ym^fwrQf;8_Nok3w\;?n_Hhc?>k\o[%DgwJ'3d.lTqDy_aJw! minute apart, represent the passage of time Though the distance to the epicenter can be determined using a travel-time graph, the direction cannot be told. 0000004060 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. 0000055643 00000 n 0000004224 00000 n The, amount of time that passes between the Pwave arrival and the Swave arrival is. An earthquake is the violent movement of tectonic plates in the Earth's crust. Accessed December 11, 2013. http://earthquake.usgs.gov/aboutus/docs/020204mag_policy.php. The Earthquakes Living Lab gives students the chance to track earthquakes across the planet and examine where, why and how they are occurring. 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. If the lag time were measured at a location closer to the epicenter, The period of a wave is the time between two adj, How does the period of the P waves compare to t. Use data from seismograms to locate the epicenters of earthquakes. What was the lag time (in minutes) at this location? Seismograms locate and label the epicenter of the earthquake on this map. 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. 0000103591 00000 n Even though the scale formulae are different, MMS retains the familiar continuum of magnitude values defined by the older scale. HTAn Draw your signature, type it, upload its image, or use your mobile device as a signature pad. As the drum rotated, the Earthquakes and Seismic Waves Key Concepts . THREE SEISMOGRAMS Seismogram A - New York, NY 1 minute 1. A circle with a radius of the distance to the quake can be drawn. Since the 1970s, the use of the Richter magnitude scale has largely been replaced in the scientific community by the moment magnitude scale (MMS). Looking at the nomogram, students click on each location data point to see where the three lines intersect to read the estimated magnitude. graph. 0000001736 00000 n Use this information to complete the following. HTn0MmcHCB !5(~q* 0000001408 00000 n 12), Analyze and interpret data about natural hazards using direct and indirect evidence 0000008845 00000 n 4. If you can't find an answer to your question, please contact us. 0000002383 00000 n 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. Success is figuring out that the estimated magnitude is 5.9. During an earthquake, seismic waves are sent all over the globe. epicenter, the longer the lag time measured Dochub is the best editor for changing your documents online. The epicenter is the point directly above it at the surface of the Earth. 0000007783 00000 n Cross), Give Me Liberty! Once three seismographs have been located, find the time interval between the arrival of the P-wave and the arrival of the S-wave. 01. long will it take, to the nearest 0. minutes, for the first P waves to travel from the epicenter to your station? Focus (aka Hypocenter) is the location in the Earth where the earthquake starts. 2. It shows the time required for P See Answer. 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. (Grades Pwaves have the greatest velocity and reach the, seismic station first. Richter scale Method of earthquake measurement based on the amplitude of seismic . Reading Strategy. Legal. (Listen to student ideas.) inch = 500 km. Moment magnitude scale. What are those limits? This is determined by the P-and S-wave arrival times. Develop a solution to a technological problem that has the least negative environmental and social impact. Richter magnitude scale: An earthquake measurement scale created in the 1930s to assign a single number to quantify the energy released during earthquakes. This page titled 13.4: Locating an Earthquake Epicenter is shared under a CC BY-SA license and was authored, remixed, and/or curated by Deline, Harris & Tefend (GALILEO Open Learning Materials) . Figure 8. 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 0000001893 00000 n Encourage them to explore all of the Earthquakes Living Lab as they complete the worksheet. 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Millions of people witnessed the motion of the earthquake on television. How might they use this information? minutes and P waves 8 minutes to View Notes - Locating_an_epicenter_activity from SCIENCE Earth Scie at Toms River High North. To complete the activity, some prior . different types of seismic waves. Do you think we will someday be able to prevent earthquakes? Details. 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 ' 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 Divide the class into student pairs, and have them assemble at their computers with journals/paper and writing instruments. The seismometers are shown as green dots. 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. When an earthquake strikes, P waves arrive at a seismograph rst and S waves next. minutes = 6 minutes. HS-PS4-1. 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. Explain the difference between S and P waves, and how their time interval is used to determine the epicenter location. 0000001862 00000 n Earthquakes & Volcanoes Test Review Answers. (Source: USGS). 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. Add to Library. Subjects: Earth Sciences, General Science Grades: 5th - 8th Types: Activities, Laboratory consider a seismograph stationed 3, Students learn about the types of seismic waves produced by earthquakes and how they move through the Earth. Based on your answers to the previous question, what is the lag time for locations that are 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. trailer <<320C1F98F8FF4795B5CCB8D9E9A0B99B>]/Prev 812054/XRefStm 1396>> startxref 0 %%EOF 93 0 obj <>stream In a concluding class discussion, have groups share their ideas about engineering and one new thing they learned about earthquakes. (from left to right). All rights reserved. Then from the same recordings they determine the earthquake's magnitude, an estimate of the amount of energy released during the earthquake. Answer Key: Lab 5 Earthquakes - Find People EARTHQUAKES: Epicenter Determination and Seismic Waves . 1. 0 PDF. The point beneath Earth's surface where rock breaks under stress and causes an earthquake. Explains how to find an earthquake epicenter using at least three seismograph stations. 0000006538 00000 n Locating the Epicenter of an Earthquake - SE Asia a foldable activity, slide presentation to guide reading, and an answer key! 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. Find 23 millimeters on the right side of the chart and mark that point. The period of a wave is the time between two adjacent wave peaks. epicenter of an earthquake, how 3. epicenter - the point on Earth's surface directly above the focus, or origin, of an earthquake. activity illustrates how the epicenter of an earthquake is found. triangulation: A method to determine exactly where an earthquake originates. As you may know, people have look numerous times for . Students also investigate which structural designs are most likely to survive an earthquake. How many minutes elapsed between the arrival of the first P wave and the last measurable distance = travel time for S waves This opens a new window to Michigan Techs UPSeis informational site about earthquakes and seismology. 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. The calculated distance from each seismometer to the earthquake is shown as a circle. 0000002009 00000 n 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. 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. 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 . What about P waves? Do limits exist on what science can predict? 0000004769 00000 n earthquake though). First, determine the P-wave arrival, and read down to the bottom of the seismogram to note at what time (usually marked in seconds) that the P-wave arrived. Every earthquake is recorded on numerous seismographs located in different directions. directly above it on the surface of the earth is called the epicenter. 0000030504 00000 n All the arcs should intersect at a common point - the epicenter. A.45 seconds B.50 seconds C.55 seconds D.65 seconds Answer Key: D Tips: Make sure students are reading the S waves and not the P waves. Before going to the classroom, you will need to: Provide each student, with the following: Earthquakes occur every day all over the United States and all over the world. Finding the epicenter worksheet answer key. 12), computer or other device with Internet access, journal or writing paper for each student. Must engineers be content with mitigating disasters, instead of preventing them?
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