0000078169 00000 n (Grades Objective Use data from seismograms to locate the epicenters of earthquakes. 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. Students learn what causes earthquakes, how we measure and locate them, and their effects and consequences. 0 The USGS and its partners monitor and report earthquakes, assess earthquake impacts and hazards, and . hb```f``Rl@ (l"`+uk?0.a~@6Vm;| G3f`75@v@Wz|A4#w9{(` ) PDF. =Cv :~4yrXP 62{_,*Uq/O-oUNBr-$y~:G},#3e^CS6U*_zVGY7ZNUWk2f?? {%!,"{u5E&OOqA_"/uxn-kx+Vz*EQb)Q PDF Example Answers - TeachEngineering Click on New Document and select the file importing option: upload Locating the epicenter of an earthquake worksheet answer key from your device, the cloud, or a protected link. Locating_an_epicenter_activity - Activity4 - Course Hero Scientists use triangulation to find the epicenter of an earthquake. Where the 3 circles intersect is the approximate location to the epicenter of the earthquake. For this activity, select the "Chile" box. 12), computer or other device with Internet access, journal or writing paper for each student. Key Facts & Information. hWmo9+[+UH EkNB|6YiaVJ=cRh7{T1R,5LI1$K=s)XR&87@&$LTPLutlcyNuzjf--\?qaXZM&HM.Eg"HnTqSWqN0&~2kf0 Md|d&:zhe)7I? See Answer. Scientists and engineers around the globe gather data through observation and experimentation and use it to describe and understand how the world works. 0000001408 00000 n 0000001675 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. 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. What data is used to determine magnitude? https://people.wou.edu/~taylors/gs104/lab5key.pdf Locating Earthquake Epicenters | CK-12 Foundation Apr 8, 2020 . 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. (Listen to student ideas.) Identify P, S, and surface waves on seismograms, Measure amplitude and lag time on seismograms, Use triangulation to accurately locate the epicenter of an earthquake, Accurately report the latitude and longitude of the epicenter, Sea Floor Lab Help with Problem 2 - Tagged, Metamorphic Rocks Lab Instructions - Tagged, Lab exam 2 - Study guide for the second exam regarding all the labs and material covered, Redaccion de textos II Marco n 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. 500p;333aXb3 \a.1. Through the online Earthquakes Living Lab, student pairs explore various types of seismic waves and the differences between shear waves and compressional waves. A little under 30 seconds, maybe around 26 seconds. aqmd. Section 8.1 What Is an Earthquake? The magnitude determination is based on seismic data. Every year, earthquakes cause death and destruction worldwide. Then do the same for the S-wave. How far do S waves travel in 5 Step 1: ans- d) 65 seconds Ste . distance from transducer to the focal point. 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. Empirical evidence is required to differentiate between cause and correlation and make claims about specific causes and effects. Also commonly termed the focus. DocHub v5.1.1 Released! You will receive your score and answers at the end. The three seismograms in this activity are unfi ltered station records from a single event that occurred on August 1, 1999. Describe the logarithmic nature of the earthquake magnitude scale. 4. HS]o01j6R0iMm4U=wL8]BE< 1. Figure 8. This is determined by the P-and S-wave arrival times. The magnitude is the logarithm of the amplitude of the ground wave. Solved ACTIVITY 2B Locating an Earthquake Figure 5 shows - Chegg trailer <<320C1F98F8FF4795B5CCB8D9E9A0B99B>]/Prev 812054/XRefStm 1396>> startxref 0 %%EOF 93 0 obj <>stream Zip. directly above it on the surface of the earth is called the epicenter. How are S and P waves used to determine how far away epicenters are? Once three seismographs have been located, find the time interval between the arrival of the P-wave . For example, Apr 8, 2020 One seismogram indicates the distance to the epicenter. The Earthquakes Living Lab gives students the chance to track earthquakes across the planet and examine where, why and how they are occurring. 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. Make an overhead copy of each of the handouts. If the lag time were measured at a location closer to the epicenter, how would it compare 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. Develop a solution to a technological problem that has the least negative environmental and social impact. Figure 2. [k0 |`2dGXGGGd00A(60P-e = F5n -f$ C Every earthquake is recorded on numerous seismographs located in different directions. Pwaves have the greatest velocity and reach the, seismic station first. Many updates and improvements! What did it feel like? The farther away the epicenter is, the greater the difference . 0000002544 00000 n Refer to the data table and use the difference in arrival times to determine the distance to the earthquake epicenter for Station 2. within type by subtype, then by grade, etc. 0000030968 00000 n Q(_?!6YV3B"\'9:4gTp*7^/P.X!skfkJ)1nG#a\{UD+iWM+ rQR]9SFTUPlM#"c:;tnsQPlu]Uyv?Ge}W;8cMA/x}'5clES~+}S+N7}wQ:/BkmI^" 5oqaBC[TRjq4.e}F:SQg{=u\xcg~EaZKReoC?oahJ` 'w endstream endobj 77 0 obj <>stream Earthquakes & Volcanoes Test Review Answers. d>(ZvO= PDF Finding Epicenters Lab Answer Key Lab Pdf Using historical seismographs, engineers forecast the strength or magnitude of earthquakes and make predictions and determine building codes and safety protocols. 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. 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. earthquakes. The American Geosciences Institute represents and serves the geoscience community by providing collaborative leadership and information to connect Earth, science, and people. What is the time lag for the Seattle, Washington, seismic station? PDF Page - 1 Lab 08 - Seismology - Locating the Epicenter of an Earthquake 0000002250 00000 n earthquake though). The period of P waves is shorter, than the period of surface waves. 11 minutes elapsed between the first P wave and the last measurable surface wave. What about P waves? Analyze and interpret data on natural hazards to forecast future catastrophic events and inform the development of technologies to mitigate their effects. If your seismograph station is Epicenter is the location on the surface of the Earth directly above where the earthquake starts. Students learn how engineers build shake tables that simulate the ground motions of the Earth caused by seismic waves in order to test the seismic performance of buildings. 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. gov For online instructions and current fees click here. (from left to right). 0000078100 00000 n %PDF-1.5 % What is an earthquake? Of the four Earthquakes Living Lab seismic areas, choose the "Chile" box, as shown in Figure 3. A.45 seconds B.50 seconds C.55 seconds D.65 seconds Answer Key: D Students learn about the types of seismic waves produced by earthquakes and how they move through the Earth. 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. 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"? After reading about earthquakes, open a new window to an Earthquake Simulator at, Follow the simulation instructions. Collect any giveaways for the students, such as earthquake posters or plate tectonic fliers. Thanks for your feedback! 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. 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. 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Practice with Triangulation: Locating an earthquake epicenter. hbb2b`b``a I @ endstream endobj 62 0 obj <>/Metadata 55 0 R/Pages 51 0 R/StructTreeRoot 57 0 R/Type/Catalog/ViewerPreferences<>>> endobj 63 0 obj <>/Font<>>>/Fields[]>> endobj 64 0 obj <>/Font<>/ProcSet[/PDF/Text]>>/Rotate 0/TrimBox[0.0 0.0 612.0 792.0]/Type/Page>> endobj 65 0 obj <> endobj 66 0 obj <> endobj 67 0 obj <> endobj 68 0 obj <>stream In this activity, the epicenter of the earthquake is in the center of Los Angeles, CA. 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. minute apart, represent the passage of time 0000007097 00000 n ' 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 To accurately locate an earthquake epicenter, records from three. 1. 0000002840 00000 n It is called triangulation because a triangle has three sides, and it takes three seismographs to locate an earthquake. 0000001777 00000 n What is the Accessed December 11, 2013. http://en.wikipedia.org/wiki/Moment_magnitude_scale, Novak, Gary. So next, students compute the magnitude of this same earthquake by looking at the three simplified seismograms again, but this time selecting each's maximum S wave amplitude (height). When an earthquake strikes, P waves arrive at a seismograph rst and S waves next. Millions of people witnessed the motion of the earthquake on television. 0000001143 00000 n seismograph: An instrument that measures motions of the ground, including those of seismic waves generated by earthquakes. 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. How does the period of the P waves compare to the period of the surface waves? As discussed earlier in this lesson, this method of determining the epicenter of an . The epicenter of an earthquake can be found using the difference between the arrival of the Primary and Secondary waves. Thanks for your feedback! 9 - Locating Earthquake Epicenter Lab Answer Key buysms de. 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. Considered best for measuring small earthquakes (3.5 M or less). PDF EARTHQUAKE EPICENTER LOCATION EXERCISE - Idaho geology Mr Gneiss. Section A - Operator Information 1. PDF Lecture 3 Activity: Locating an Earthquake Epicenter HlRnQ?R\>BjK' Make changes to the sample. It travels faster than the same earthquake's S wave (almost double the speed) and is similar to sound waves. (Grades In this 1-to-10 logarithmic scale, each succeeding level representing 10 times as much energy as the last. 83 0 obj <> endobj So the difference in the P- and S-wave arrival times determines the distance between the epicenter and a seismometer. 9 - Conclude the activity with a class discussion (and perhaps homework questions) to share ideas and answers, as described in the Assessment section. (i. Earthquakes occur along faults, which are cracks in the Earths crust that build tension. 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 .
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