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. 13. Seismic Waves. 0000001533 00000 n As discussed earlier in this lesson, this method of determining the epicenter of an . HS]o01j6R0iMm4U=wL8]BE< atrial depolarization. It travels faster than the same earthquake's S wave (almost double the speed) and is similar to sound waves. 0000002094 00000 n Step 1: ans- d) 65 seconds Ste . Three seismographs are needed. Seismograms 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 startxref Earthquakes can also cause tsunamis, which are very large waves that can damage coastlines and put coastal residents in danger. Millions of people witnessed the motion of the earthquake on television. A little under 30 seconds, maybe around 26 seconds. Once three seismographs have been located, find the time interval between the arrival of the P-wave . What data is used to determine magnitude? You learned that seismologists determine the distance to the earthquake epicenter using the difference between S and P wave arrival times. locate and label the epicenter of the earthquake on this map. at that station. Next, have student groups answer the eight questions in the. 0 500 1000 1500 2000 2500 3000 The, amount of time that passes between the Pwave arrival and the Swave arrival is. 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. 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. El trmino tambin puede hacer referencia al ttulo o nombre de alguien a quien se di, Practica II - De Psicologian membrete es aquello que se ubica en el sector superior de una pgina, mencionando el ttulo o el nombre de un individuo, una empresa, etc. HS-PS4-1. The Richter scale was created in the 1930s to assign a single number to quantify the energy released during earthquakes. waves from a distant earthquake. trailer <<0444DE89825047A1A483C62E98F50868>]>> startxref 0 %%EOF 114 0 obj <>stream Practicing this technique, the students work several problems on a map of the US. H\0y Figure 13.10). The USGS and its partners monitor and report earthquakes, assess earthquake impacts and hazards, and . inch = 500 km. (Listen to student ideas.) Sixty-seven people lost their lives, and property damage was estimated at $6 billion. 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. Students first triangulate the location of an earthquake's epicenter, then calculate its magnitude. However, please review it for the specific setting, materials, students, and conventional safety precautions. 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. Adjust the timing to the class period, remembering that you will need time to introduce the investigation, clean up afterwards, and re-set up for the next class (if you are working with more than one class). It is slower than the same earthquake's P wave and cannot travel through liquids. 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. 0000003966 00000 n 0000030504 00000 n If a quake is near the seismograph, the S-waves arrive shortly after the P-waves. DocHub v5.1.1 Released! Multiply the difference by 8.4 to estimate the distance, in kilometers, from the seismograph station to the epicenter. lag time. 0000106240 00000 n What data is used to determine magnitude? While earthquake locations are normally done with a computer that can quickly determine the paths of seismic waves through the Earth to many seismic stations, 15 Introduction to Geology Chapter Worksheet . between arrival of P and S waves is called (5 minutes) Discuss how gathering information on epicenters can be applied. Then from the same recordings they determine the earthquake's magnitude, an estimate of the amount of energy released during the earthquake. 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. MS-ESS3-2. 0000000856 00000 n Have students click on the Earthquakes Living Lab hyperlink in the top left in the earthquakes section. This section explains what earthquakes and faults are and what causes earthquakes. Locating the Epicenter of an Earthquake - SE Asia a foldable activity, slide presentation to guide reading, and an answer key! See Answer. The western U.S. has more faults than the eastern U.S., and therefore the western U.S. has more earthquakes. Send activity 4 locating an earthquake epicenter worksheet answers via email, link, or fax. 0000002383 00000 n Epicenter. to the lag time measured at this location? 0000001736 00000 n At least 3 earthquake recording stations are required to find the location of the earthquake epicenter. It's a logarithmic scale from 1 to 10 with each succeeding level representing 10 times as much energy as the last. Describe the logarithmic nature of the earthquake magnitude scale. 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. Sign, fax and printable from PC, iPad, tablet or mobile with pdfFiller Note-taking Worksheet. Triangulation is required to determine exactly where it happened. (Figure 3):. Edit your locating an earthquake epicenter worksheet answers online. earthquake lab lab: locating the epicenters of earthquakes objective measurable learning outcomes use data from seismograms to locate the epicenters of Skip to document Ask an Expert Sign inRegister Sign inRegister Home Ask an ExpertNew My Library Discovery Institutions Western Governors University Southern New Hampshire University E}g7$i(=K)"aj%v]vPcYloi@X3noGX{[XucOgkdF.>Ym^fwrQf;8_Nok3w\;?n_Hhc?>k\o[%DgwJ'3d.lTqDy_aJw! First locate and mark the three seismic stations on the world map provided below. If you can't find an answer to your question, please contact us. Click on New Document and select the file importing option: upload Locating the epicenter of an earthquake worksheet answer key from your device, the cloud, or a protected link. 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. You can also download it, export it or print it out. The living lab presents earthquake information through a focus on four active seismic areas and historic earthquakes in those areas. THREE SEISMOGRAMS Seismogram A - New York, NY 1 minute 1. Use of the TeachEngineering digital library and this website constitutes acceptance of our Terms of Use and Privacy Policy. 0000031066 00000 n *The NGSS logo is a registered trademark of WestEd. 0000004769 00000 n Scientists use triangulation to find the epicenter of an earthquake. and S waves depends on the distance from the epicenter of the answer the following question. distance from transducer to the focal point. minutes = 6 minutes. 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. 83 0 obj <> endobj EARTHQUAKES: Epicenter Determination and Seismic Waves First locate and mark the three seismic stations on the world map provided below. Another method of locating an earthquake is to use the P-wave arrival-time minus origin-time (P - O) interval instead of distance. 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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. Epicenter Location on Earth's surface directly above the focus of the earthquake 5. 3000 miles. Tracings made at three separate seismic stations are needed to locate an earthquake epicenter. 9 - 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. Using 3 seismograms the students will be able to triangulate the epicenter of an earthquake. (Source: USGS, Wikipedia). 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. Download. Pwaves have the greatest velocity and reach theseismic station first. 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. As the drum rotated, the Earthquakes & Volcanoes Test Review Answers. 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. The vertical lines, spaced one, minute apart, represent the passage of time, (from left to right). Locating Earthquake Epicenter Lab Answer Key buysms de. For lower grades, just introduce the concepts of triangulation and the magnitude scale; a thorough understanding of P and S waves is not vital.