activity 4 locating an earthquake epicenter answer key

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. inch = 500 km. Use Figure 5 and the travel-time graph in Figure 4 to determine . EARTHQUAKES: Epicenter Determination and Seismic Waves First locate and mark the three seismic stations on the world map provided below. 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. Please answer the following questions using the earthquake video - shake, shake, shake. 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. Answer the following questions in the spaces provided. !D,X2:azTG)kPT~Mj 4>d w@O'. 0000078169 00000 n Three seismographs are needed. Looking at the nomogram, students click on each location data point to see where the three lines intersect to read the estimated magnitude. Earthquakes and Seismic Waves Key Concepts . 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. Step 1: ans- d) 65 seconds Ste . What did it feel like? 5 4. Show students some of the numerous online animations comparing the movements of P and S waves. (Grades The hypocenter is the point within the earth where an earthquake rupture starts. Use the graph to answer the questions that follow. 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. P wave. Scientists use triangulation to find the epicenter of an earthquake. Wikipedia, The Free Encyclopedia. use slide 6 and answer key slide 7 how can i locate the earthquake epicenter michigan web the epicenter of the earthquake is somewhere on the edge of that circle do the Activity: Locating an Earthquake Epicenter Lecture 3 Damage from the earthquake was widespread, but the actual location of the earthquake (the epicenter) 0000098546 00000 n The spot where those three circles intersect is the epicenter (Figure 13.12). 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 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. (Grades Millions of people witnessed the motion of the earthquake on television. $8.25. The living lab presents earthquake information through a focus on four active seismic areas and historic earthquakes in those areas. MS-ESS3-2. 0000001893 00000 n 12), computer or other device with Internet access, journal or writing paper for each student. How does the Mad Scientist. See Answer. Tips: Make sure students are reading the S waves and not the P waves. HtA1D41`s(GME$Ke*YdEOYf2-:r. It is slower than the same earthquake's P wave and cannot travel through liquids. Quick Tips. P and Swaves are body waves and travel, through the interior of the earth. Was there an initial quake followed by smaller quakes? 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. Video Guide / Worksheets and Quizzes for Quizzes and Answer Sheet __ 2. How is the magnitude of an earthquake determined? If a quake is near the seismograph, the S-waves arrive shortly after the P-waves. 0000006984 00000 n Run through the investigation yourself and record the data, just to see how long it takes. Objective Use data from seismograms to locate the epicenters of earthquakes. [N'. In order to determine the location of an earthquake epicenter, seismographsfrom at least three different places are needed for a particular event. (, 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. 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). Success is figuring out that the estimated magnitude is 5.9. seismogram. 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. Once three seismographs have been located, find the time interval between the arrival of the P-wave . time for any point that is 3,000 miles Lab Exercise #2: Locating the Epicenter of an Earthquake In this lab exercise, you will locate the epicenter of an earthquake. How can you locate an earthquake's epicenter? Find 23 millimeters on the right side of the chart and mark that point. 12), Evaluate ways that technology can impact individuals, society, and the environment. 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 . 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The three seismograms in this activity are unfi ltered station records from a single event that occurred on August 1, 1999. In Figure 13.9, there is an example seismogram from a station that includes a minor earthquake. Assess their understanding based on the thoroughness of their answers. Send activity 4 locating an earthquake epicenter worksheet answers via email, link, or fax. 0000006011 00000 n 12), Analyze and interpret data about natural hazards using direct and indirect evidence Hand out the worksheets to the groups and direct them to read through the instructions. Construct an oral and written argument supported by empirical evidence and scientific reasoning to support or refute an explanation or a model for a phenomenon or a solution to a problem. Students learn about the types of seismic waves produced by earthquakes and how they move through the Earth. different types of seismic waves. PDF. 0000001861 00000 n They use three seismographs in a process called triangulation to determine earthquake epicenters. P and S arrivals, you can now locate an earthquake your answers below. In the ASN, standards are hierarchically structured: first by source; e.g., by state; within source by type; e.g., science or mathematics; 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. earthquakes. Accessibility StatementFor more information contact us atinfo@libretexts.orgor check out our status page at https://status.libretexts.org. Finding the Epicenter Determine the epicenter distance from three different seismographs. What data is used to determine magnitude? 3000 miles. As discussed earlier in this lesson, this method of determining the epicenter of an . For example, Earthquakes Living Lab: Finding Epicenters & Measuring Magnitudes. Today we will be using a traveltime graph, where the vertical separation between, the P and S curves is equal to the difference in the arrival times between the Pwave, and Swave. 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These distances are determined using a travel-time curve, which is a graph of Pand S-wave arrival times (see Figure 13.11). You learned that seismologists determine the distance to the earthquake epicenter using the difference between S and P wave arrival times. For purposes of this activity, the least complicated and probably most accurate approach is to just use the term "magnitude," without needing to say "on the Richter scale" or "on the moment magnitude scale." 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Using historical seismographs, engineers forecast the strength or magnitude of earthquakes and make predictions and determine building codes and safety protocols. 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. Swaves arrive at the seismic station after the Pwaves. 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. The American Geosciences Institute represents and serves the geoscience community by providing collaborative leadership and information to connect Earth, science, and people. Use of the TeachEngineering digital library and this website constitutes acceptance of our Terms of Use and Privacy Policy. Thus technology use varies from region to region and over time. So the difference in the P- and S-wave arrival times determines the distance between the epicenter and a seismometer. Y$Kr;V6[;Dq vg~cx:A[^jCssupwD endstream endobj 80 0 obj <> endobj 81 0 obj <>stream 0000033429 00000 n Epicenter Location on Earth's surface directly above the focus of the earthquake 5. Divide the class into student pairs, and have them assemble at their computers with journals/paper and writing instruments. 0000001862 00000 n To do this, have the students use, Find the epicenter of the earthquake on the map (. 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. After this activity, students should be able to: Each TeachEngineering lesson or activity is correlated to one or more K-12 science, Accessed December 11, 2013. http://earthquake.usgs.gov/aboutus/docs/020204mag_policy.php. By looking at the time between the arrivals of the P- and S-waves, one can determine the distance to the earthquake from that station, with longer time intervals indicating longer distance. 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! lag time. 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"? endstream endobj 84 0 obj <> endobj 85 0 obj <> endobj 86 0 obj <>stream We have answers to the most popular questions from our customers. Apr 8, 2020 One seismogram indicates the distance to the epicenter. 0000002507 00000 n Triangulation to Locate an Earthquake By Earthquake Hazards Original Thumbnail Medium Detailed Description Triangulation can be used to locate an earthquake. %PDF-1.4 % HlRnQ?R\>BjK' When seismic data is collected from at least three different locations, it can be used to determine the epicenter by where it intersects. 9 - 0000103591 00000 n Engineers first determine where earthquakes are likely to occur, and how severe they are likely to be. (Figure 3):. It is called triangulation because a triangle has three sides, and it takes three seismographs to locate an earthquake. After reading about earthquakes, open a new window to an Earthquake Simulator at, Follow the simulation instructions. 0000115324 00000 n technology, engineering or math (STEM) educational standards. How does the period of the P waves compare to the period of the surface waves? If your seismograph station is 1) Identify the general term for waves released from an earthquake. Epicenter. Therefore, the lag Figure 2. Mark the first arrival of the swave on each seismogram. There are two sets of data and maps to do this activity/ lab for than once. In this 1-to-10 logarithmic scale, each succeeding level representing 10 times as much energy as the last. 0000001978 00000 n Make arrangements so that each student group has a computer with Internet access. distance from transducer to the focal point. Once three seismographs have been located, find the time interval between the arrival of the P-wave and the arrival of the S-wave. endstream endobj startxref 3. epicenter - the point on Earth's surface directly above the focus, or origin, of an earthquake. For example, the western United States has earthquakes more frequently and on a larger scale than the eastern part of the country. 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. 0000001736 00000 n Moment magnitude scale. Resources. What was the lag time (in minutes) at this location? The calculated distance from each seismometer to the earthquake is shown as a circle. The Richter scale was created in the 1930s to assign a single number to quantify the energy released during earthquakes. 0000005149 00000 n

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