Last updated November 26, 2013. (Listen to student ideas.) Ch Person/Attorney Filing: - Superior Court - Maricopa County - superiorcourt maricopa. To abbreviate, use the symbol M (a capital M, plain text, no sub/superscripts) expressed to the nearest 0.1. If you draw a circle on a map around three different seismographs where the radius of each is the distance from that station to the earthquake, the intersection of those three circles is the epicenter. 0000002094 00000 n ?t?s=Yt '_( endstream endobj 76 0 obj <>stream 0000004511 00000 n Tips: Make sure students are reading the S waves and not the P waves. A.45 seconds B.50 seconds C.55 seconds D.65 seconds Answer Key: D Locating Earthquake Epicenter Lab - Triangulation sheet for students and/or teachers to use (Slide 6), and answer key (Slide 7). Looking at the nomogram, students click on each location data point to see where the three lines intersect to read the estimated magnitude. If you complete all the problems, you should be able to: Identify P, S, and surface waves on a simple seismogram. How is the magnitude of an earthquake determined? Finding the epicenter worksheet answer key. 1. distance from transducer to the focal point. 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. P wave: The first seismic wave of an earthquake. 0000001736 00000 n ya{I;W@DgMN2:UtbT=*+cY1.8Vm(u3Zt"J @9TAjJH@H_F3n7\Srdw~gAR#JQGj`ueS! Do you agree with this alignment? pen recorded the arrival of P, S, and surface Richter magnitude scale: An earthquake measurement scale created in the 1930s to assign a single number to quantify the energy released during earthquakes. Explain the difference between S and P waves, and how their time interval is used to determine the epicenter location. Alignment agreement: Was there an initial quake followed by smaller quakes? Explains how to find an earthquake epicenter using at least three seismograph stations. HS-PS4-1. Scientists and engineers around the globe gather data through observation and experimentation and use it to describe and understand how the world works. The spot where those three circles intersect is the epicenter (Figure 13.12). How does distance from the epicenter affect the S-P time interval? 0000001533 00000 n at that station. 0000001893 00000 n hWmo9+[+UH EkNB|6YiaVJ=cRh7{T1R,5LI1$K=s)XR&87@&$LTPLutlcyNuzjf--\?qaXZM&HM.Eg"HnTqSWqN0&~2kf0 Md|d&:zhe)7I? Swaves arrive at the seismic station after the Pwaves. This worksheet focuses on using the p and s graph to find different variables. Using 3 seismograms the students will be able to triangulate the epicenter of an earthquake. Thanks for your feedback! Where the 3 circles intersect is the approximate location to the epicenter of the earthquake. farther from the epicenter of an earthquake? 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. An earthquake is what happens when two blocks of the earth suddenly slip past one directly above it on the surface of the earth is called the epicenter. They make a model of a seismographa measuring device that records an earthquake on a seismogram. 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) . Do limits exist on what science can predict? Multiply the difference by 8.4 to estimate the distance, in kilometers, from the seismograph station to the epicenter. Using historical seismographs, engineers forecast the strength or magnitude of earthquakes and make predictions and determine building codes and safety protocols. Student exploration Graphing Skills SE Key Gizmos Explore Learning. Take a few minutes to read the information on the left side of this page for the 2010 earthquake off the coast of central Chile. 0000006984 00000 n (Figure 3):. Show students some of the numerous online animations comparing the movements of P and S waves. S-P interval: The time interval between the arrivals of P and S waves. Collect any giveaways for the students, such as earthquake posters or plate tectonic fliers. In order to determine the location of an earthquake epicenter, seismographs from at least three different places are needed for a particular event. To do this, have the students use, Find the epicenter of the earthquake on the map (. 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. At least 3 earthquake recording stations are required to find the location of the earthquake epicenter. Epicenter is the location on the surface of the Earth directly above where the earthquake starts. A. Seismic waves-waves generated by an earthquake, can move the ground forward and back- answers the question. Note the differences in When the tension becomes too great, the fault slips, causing an earthquake. Tracings made at three separate seismic stations are needed to locate an earthquake epicenter. 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. For lower grades, just introduce the concepts of triangulation and the magnitude scale; a thorough understanding of P and S waves is not vital. The living lab presents earthquake information through a focus on four active seismic areas and historic earthquakes in those areas. earthquakes. P and Swaves are body waves and travelthrough the interior of the earth. The hypocenter is the point within the earth where an earthquake rupture starts. Share with Classes. distance = travel time for S waves How can you locate an earthquake's epicenter? [*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 0000002840 00000 n Please answer the following questions using the earthquake video shake, shake, shake. Answer Key: Lab 5 Earthquakes - Find People EARTHQUAKES: Epicenter Determination and Seismic Waves . It shows the time required for P Add to Library. This is determined by the P-and S-wave arrival times. Cross), Give Me Liberty! Therefore, the lag 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. Locating Earthquake Epicenter Lab Answer Key buysms de. Last modified July 18, 2012. When an earthquake strikes, P waves arrive at a seismograph rst and S waves next. 0000008845 00000 n earthquake though). As you may know, people have look numerous times for . 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. Use mathematical representations to support a claim regarding relationships among the frequency, wavelength, and speed of waves traveling in various media. 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. Y$Kr;V6[;Dq vg~cx:A[^jCssupwD endstream endobj 80 0 obj <> endobj 81 0 obj <>stream Conclude the activity with a class discussion (and perhaps homework questions) to share ideas and answers, as described in the Assessment section. This is determined by the P-and S-wave arrival times. Free K-12 standards-aligned STEM curriculum for educators everywhere. 9 - Use this information to complete the following. The farther a station is from the 0000003855 00000 n triangulation: A method to determine exactly where an earthquake originates. d>(ZvO= 0000098546 00000 n 0000000856 00000 n 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. %PDF-1.5 % activity illustrates how the epicenter of an earthquake is found. 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. 2. 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. After this activity, students should be able to: Each TeachEngineering lesson or activity is correlated to one or more K-12 science, !D,X2:azTG)kPT~Mj 4>d w@O'. THREE SEISMOGRAMS Seismogram A - New York, NY 1 minute 1. to the lag time measured at this location? Section 8.1 What Is an Earthquake? 0000001396 00000 n 0000005081 00000 n 0000078100 00000 n 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. 1) Identify the general term for waves released from an earthquake. 9 - Focus (aka Hypocenter) is the location in the Earth where the earthquake starts. Students learn about factors that engineers take into consideration when designing buildings for earthquake-prone regions. The three seismograms in this activity are unfi ltered station records from a single event that occurred on August 1, 1999. For upper grades, have students work individually, do two of the three seismic area tutorials, and look up historical earthquakes to learn their magnitudes, and make data tables or graphs with this information. Thus technology use varies from region to region and over time. : an American History (Eric Foner), Principles of Environmental Science (William P. Cunningham; Mary Ann Cunningham), Forecasting, Time Series, and Regression (Richard T. O'Connell; Anne B. Koehler), Chemistry: The Central Science (Theodore E. Brown; H. Eugene H LeMay; Bruce E. Bursten; Catherine Murphy; Patrick Woodward), Biological Science (Freeman Scott; Quillin Kim; Allison Lizabeth), Campbell Biology (Jane B. Reece; Lisa A. Urry; Michael L. Cain; Steven A. Wasserman; Peter V. Minorsky), How many minutes elapsed between the arrival of the first P wave and. 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. The period of P waves is shorter, than the period of surface waves. 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. 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. The USGS now uses the MMS to estimate magnitudes for all modern large earthquakes. Three seismographs are needed. Lab Exercise #2: Locating the Epicenter of an Earthquake In this lab exercise, you will locate the epicenter of an earthquake. How do we determine the epicenter of an earthquake? Earthquakes and Volcanoes. 0000103591 00000 n E}g7$i(=K)"aj%v]vPcYloi@X3noGX{[XucOgkdF.>Ym^fwrQf;8_Nok3w\;?n_Hhc?>k\o[%DgwJ'3d.lTqDy_aJw! How does distance from the epicenter affect the magnitude (height) of the seismograph reading? 0000001408 00000 n 3. In Figure 13.9, there is an example seismogram from a station that includes a minor earthquake. Learn more How Can I Locate the Earthquake Epicenter? 0000002250 00000 n 4. fault - a fracture in Earth's crust where the rocks on either side have moved. If a quake is far from the seismograph, the P-waves arrive long before the S-waves. Use mathematical representations of phenomena or design solutions to describe and/or support claims and/or explanations. Direct students to finish the activity by completing the. (5 minutes) Discuss how gathering information on epicenters can be applied. 3. epicenter - the point on Earth's surface directly above the focus, or origin, of an earthquake. 0000031066 00000 n What data is used to determine magnitude? cCV&0Lw1~c\4QA!{q: N3\`Lccgb,x/if`WH3(\'q)Da'@ | endstream endobj 92 0 obj <>/Filter/FlateDecode/Index[57 4]/Length 20/Size 61/Type/XRef/W[1 1 1]>>stream 9 - Mr Gneiss. a project of D2L (www.achievementstandards.org). hb```f``Rl@ (l"`+uk?0.a~@6Vm;| G3f`75@v@Wz|A4#w9{(` ) Earth and Space, Physical Science, A process called triangulation uses seismic data from three locations to identify the epicenter of an earthquake.copyrightCopyright USGS http://earthquake.usgs.gov/learn/kids/eqscience.php. moment magnitude scale: Similar to the Richter scale, but replacing its use starting in the 1970s for more accuracy in measuring big earthquakes (magnitudes > 3.5) from greater distances. 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. BDF endstream endobj 74 0 obj <>stream Draw your signature, type it, upload its image, or use your mobile device as a signature pad. 0000000956 00000 n 2. technology, engineering or math (STEM) educational standards.