0000000016 00000 n 0000002094 00000 n H\0y All 100,000+ K-12 STEM standards covered in TeachEngineering are collected, maintained and packaged by the Achievement Standards Network (ASN), Short for "secondary wave" or "shear wave." Use this information to complete the following. P and S arrivals, you can now locate an earthquake your answers below. How does the period of the P waves compare to the period of the surface waves? In this activity, the epicenter of the earthquake is in the center of Los Angeles, CA. You will receive your score and answers at the end. (Figure 3):. 0000003254 00000 n Do you think we will someday be able to prevent earthquakes? n{6c&6NK*U;=9i%nF Activity4:LocatinganEarthquakeEpicenter Objectives:Ifyoucompletealltheproblems,youshouldbeableto: Identif 0000106240 00000 n 11 minutes elapsed between the first P wave and the last measurable surface wave. The three seismograms in this activity are unfi ltered station records from a single event that occurred on August 1, 1999. What about P waves? This investigation is considered generally safe to do with students. 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. and S waves depends on the distance from the epicenter of the answer the following question. Looking at the nomogram, students click on each location data point to see where the three lines intersect to read the estimated magnitude. 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. Assess their understanding based on the thoroughness of their answers. DocHub v5.1.1 Released! miles from the epicenter of an 0000030240 00000 n Then do the same for the S-wave. The calculated distance from each seismometer to the earthquake is shown as a circle. 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. Pwaves have the greatest velocity and reach theseismic station first. 0000004457 00000 n BDF endstream endobj 74 0 obj <>stream View Notes - Locating_an_epicenter_activity from SCIENCE Earth Scie at Toms River High North. 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. 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Have students turn in their answers for the Explain portion of the worksheet. d>(ZvO= /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?? The Richter scale was created in the 1930s to assign a single number to quantify the energy released during earthquakes. Every earthquake is recorded on numerous seismographs located in different directions. hb```b````e``n`d@ A 'EF''oquE"ky#:}m;9JmkPt~=unFHy&|X:70 vILZ*|%6mD! Use the process of triangulation to locate an earthquake's epicenter. The vertical lines, spaced one Resources. Question: ACTIVITY 2B Locating an Earthquake Figure 5 shows seismograms for the same earthquake recorded at three locations-New York; Nome, Alaska; and Mexico City. question 1 of 3. It travels faster than the same earthquake's S wave (almost double the speed) and is similar to sound waves. 0000006984 00000 n 0000007097 00000 n Section 8.1 What Is an Earthquake? Learn more How Can I Locate the Earthquake Epicenter? The epicenter is the point directly above it at the surface of the Earth. What is the time lag for the Seattle, Washington, seismic station? PDF EARTHQUAKES: Epicenter Determination, Seismic Waves, and Hazards - WOU There are two sets of data and maps to do this activity/ lab for than once. Answer Key: Lab 5 Earthquakes - Find People EARTHQUAKES: Epicenter Determination and Seismic Waves . 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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. Short for "primary wave" or "pressure wave." atrial depolarization. U.S. Geological Survey, U.S. Department of the Interior. endstream endobj 84 0 obj <> endobj 85 0 obj <> endobj 86 0 obj <>stream earthquake - shaking and vibration of Earth's surface. In a concluding class discussion, have groups share their ideas about engineering and one new thing they learned about earthquakes. 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. Virtual Earthquake (tutorial/simulation) 1996. 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. So the difference in the P- and S-wave arrival times determines the distance between the epicenter and a seismometer. Figure 13.10). waves from a distant earthquake. The period of a wave is the time between two adjacent wave peaks. Scientists and engineers around the globe gather data through observation and experimentation and use it to describe and understand how the world works. As the drum rotated, the Based on your answers to the previous question, what is the lag time for locations that are 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. Zip. Earthquakes Living Lab: Finding Epicenters & Measuring Magnitudes. Epicenter Location on Earth's surface directly above the focus of the earthquake 5. 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. (i. How many minutes elapsed between the arrival of the first P wave and the last measurable 4. fault - a fracture in Earth's crust where the rocks on either side have moved. Practice with Triangulation: Locating an earthquake epicenter. HlRnQ?R\>BjK' Using this resource students find the arrival times of P-waves and S-waves using a seismogram. How can you locate an earthquake's epicenter? PDF Locating An Earthquake Epicenter Lab Answers - Full PDF The vertical lines, spaced one, minute apart, represent the passage of time, (from left to right). 01. hbbd``b`$C`q9 X_$_g`bdxc`X 0000008088 00000 n Was there an initial quake followed by smaller quakes? 0000033429 00000 n Next, have student groups answer the eight questions in the. Activity 4: Locating an Earthquake Epicenter, The three basic types of seismic wave generated by an earthquake at its focus are P, waves, Swaves, and Surface waves. X!.43p2t!}SLx-3z.KN4X+H\+vk? Video Guide / Worksheets and Quizzes for Quizzes and Answer Sheet __ 2. What types of engineers might use this data the most? In this activity, students use an online simulationVirtual Earthquakethat is accessible through the Earthquakes Living Lab interface, to locate the epicenter of an earthquake by making simple measurement on three seismograms, recordings of an earthquake's seismic waves detected by instruments (seismographs) far away from the earthquake. The moment magnitude scale (MMS) was developed in the 1970s as a modification of the Richter scale and is better for measuring big earthquakes but less good for small ones. (, Have any of you ever experienced an earthquake or know anyone who has? Lab Activity Locating Epicenters Flashcards | Quizlet longer or shorter). [*aiLG?+J\QI86~}ooRrr!pm}dk@dBbZPMZlC4C\9^ SM.R\!H+$|+DUzt^w{" %&{KXjT'9yzT^UFe:+f(`PU_9%EW@\)?i qp!\G Z endstream endobj 75 0 obj <>stream Explain the difference between S and P waves, and how their time interval is used to determine the epicenter location. The period of P waves is shorter, than the period of surface waves. An earthquake is the violent movement of tectonic plates in the Earth's crust. 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The point beneath Earth's surface where rock breaks under stress and causes an earthquake. Locating the Epicenter of an Earthquake - SE Asia a foldable activity, slide presentation to guide reading, and an answer key! Reading Strategy. 0000001533 00000 n Then from the same recordings they determine the earthquake's magnitude, an estimate of the amount of energy released during the earthquake. Dochub is the best editor for changing your documents online. 0 500 1000 1500 2000 2500 3000 0000115324 00000 n 2. 12), computer or other device with Internet access, journal or writing paper for each student. Ch Person/Attorney Filing: - Superior Court - Maricopa County - superiorcourt maricopa. at that station. 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. In this 1-to-10 logarithmic scale, each succeeding level representing 10 times as much energy as the last. 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. What did it feel like? (Source: USGS). ?t?s=Yt '_( endstream endobj 76 0 obj <>stream 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. A. Seismic waves-waves generated by an earthquake, can move the ground forward and back- answers the question. All rights reserved. Use the graph to answer the questions that follow. P wave. trailer <<0444DE89825047A1A483C62E98F50868>]>> startxref 0 %%EOF 114 0 obj <>stream It's a logarithmic scale from 1 to 10 with each succeeding level representing 10 times as much energy as the last. time for any point that is 3,000 miles !5(~q* Also called seismometer. You will analyze the records and locate the earthquake using a method known The earthquake occurred somewhere along that circle.