Make arrangements so that each student group has a computer with Internet access. hb```f``Rl@ (l"`+uk?0.a~@6Vm;| G3f`75@v@Wz|A4#w9{(` ) All the arcs should intersect at a common point - the epicenter. 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. The point beneath Earth's surface where rock breaks under stress and causes an earthquake. 92 0 obj
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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. within type by subtype, then by grade, etc. EARTHQUAKES: Epicenter Determination and Seismic Waves First locate and mark the three seismic stations on the world map provided below. Even though the scale formulae are different, MMS retains the familiar continuum of magnitude values defined by the older scale. located 1,000 miles from the The magnitude is the logarithm of the amplitude of the ground wave. PDF Page - 1 Lab 08 - Seismology - Locating the Epicenter of an Earthquake d>(ZvO= A circle with a radius of the distance to the quake can be drawn. Please answer the following questions using the earthquake video shake, shake, shake. Next, have student groups answer the eight questions in the. minutes = 6 minutes. 3000 miles. Figure 2 is a seismic wave travel-time Tips: Make sure students are reading the S waves and not the P waves. 0000000016 00000 n
Legal. You will receive your score and answers at the end. longer or shorter). Since the 1970s, the use of the Richter magnitude scale has largely been replaced in the scientific community by the moment magnitude scale (MMS). Thanks for your feedback! What was the lag time (in minutes) at this location? Based on your answers to the previous question, what is the lag time for locations that are trailer
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Students learn what causes earthquakes, how we measure and locate them, and their effects and consequences. 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. Pwaves have the greatest velocity and reach theseismic station first. The farther away the epicenter is, the greater the difference . This is determined by the P-and S-wave arrival times. activity illustrates how the epicenter of an earthquake is found. Great exercise for Regents Earth Science. Before looking at the Earthquakes Living Lab, have pairs complete the, Then guide the teams to the Earthquakes Living Lab via the living lab website at. 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. HS-PS4-1. How does distance from the epicenter affect the magnitude (height) of the seismograph reading? 3. (Grades 9 - 12). *The NGSS logo is a registered trademark of WestEd. 1. (, Have any of you ever experienced an earthquake or know anyone who has? Divide the class into student pairs, and have them assemble at their computers with journals/paper and writing instruments. 0000002507 00000 n
Of the four Earthquakes Living Lab seismic areas, choose the "Chile" box, as shown in Figure 3. 0000004511 00000 n
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HtA1D41`s(GME$Ke*YdEOYf2-:r. Develop a solution to a technological problem that has the least negative environmental and social impact. 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. important in helping seismologists determine the epicenter of the earthquake. Seismic stations detect earthquakes by the tracings made on seismographs. If the lag time were measured at a location closer to the epicenter, how would it compare 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. Tracings made at three separate seismic stations are needed to locate an earthquake epicenter. To complete the activity, some prior . U.S. Geological Survey, U.S. Department of the Interior. Triangulation to Locate an Earthquake By Earthquake Hazards Original Thumbnail Medium Detailed Description Triangulation can be used to locate an earthquake. Locating the Epicenter of an Earthquake - SE Asia a foldable activity, slide presentation to guide reading, and an answer key! The magnitude determination is based on seismic data. 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. (Grades
Students also investigate which structural designs are most likely to survive an earthquake. (Figure 3):. Answer the following questions in the spaces provided. 6. 9 -
Accessibility StatementFor more information contact us atinfo@libretexts.orgor check out our status page at https://status.libretexts.org. Mr Gneiss. Locating an Epicenter Activity - Arkansas Geological Survey Apr 8, 2020 One seismogram indicates the distance to the epicenter. 0000033429 00000 n
You will analyze the records and locate the earthquake using a method known Type text, add images, blackout confidential details, add comments, highlights and more. Conclude the activity with a class discussion (and perhaps homework questions) to share ideas and answers, as described in the Assessment section. 0000001777 00000 n
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Thanks for your feedback! To accurately locate an earthquake epicenter, records from three. Locating Earthquake Epicenter Lab Answer Key buysms de. Thus technology use varies from region to region and over time. If your seismograph station is 12 Earthquake Location Lab Answer Key Full PDF - www.yvc.moeys.gov 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). cCV&0Lw1~c\4QA!{q:
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American Geosciences Institute. 0 500 1000 1500 2000 2500 3000 0000004769 00000 n
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. 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. Then from the same recordings they determine the earthquake's magnitude, an estimate of the amount of energy released during the earthquake. PDF Locating an Epicenter Activity - Arkansas Geological Survey One seismogram indicates the distance to the epicenter. Facility Name Busine Child ren Information Child Name C. Child Social Security Number Type of Case being filed - Check only one category. Three seismographs are needed. 1) Identify the general term for waves released from an earthquake. Epicenter Location on Earth's surface directly above the focus of the earthquake 5. The longer the time between the arrival of the P-wave and S-wave, the farther away is the epicenter. HlRnQ?R\>BjK' During an earthquake, seismic waves are sent all over the globe. Was there an initial quake followed by smaller quakes? As discussed earlier in this lesson, this method of determining the epicenter of an . What data is used to determine magnitude? question 1 of 3. (Source: USGS, Wikipedia). 0000007097 00000 n
Get the inside scoop on all things TeachEngineering such as new site features, curriculum updates, video releases, and more by signing up for our newsletter! Use mathematical representations to support a claim regarding relationships among the frequency, wavelength, and speed of waves traveling in various media. Copyright USGS http://earthquake.usgs.gov/learn/kids/eqscience.php. In a concluding class discussion, have groups share their ideas about engineering and one new thing they learned about earthquakes. Draw your signature, type it, upload its image, or use your mobile device as a signature pad. There are two sets of data and maps to do this activity/ lab for than once. 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. 0000003966 00000 n
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However, please review it for the specific setting, materials, students, and conventional safety precautions. Reading Strategy. Short for "primary wave" or "pressure wave." The distance to the earthquake epicenter is then determined using the "Earthquake P-Wave and S-Wave Travel Time" graph. %%EOF
Refer to the data table and use the difference in arrival times to determine the distance to the earthquake epicenter for Station 2.
This worksheet focuses on using the p and s graph to find different variables. (from left to right). (Source: USGS, Wikipedia). The lag time for any ya{I;W@DgMN2:UtbT=*+cY1.8Vm(u3Zt"J
@9TAjJH@H_F3n7\Srdw~gAR#JQGj`ueS! Add to FlexBook Textbook. Ch Person/Attorney Filing: - Superior Court - Maricopa County - superiorcourt maricopa. distance from transducer to the focal point. It is called triangulation because a triangle has three sides, and it takes three seismographs to locate an earthquake. The distance is in kilometers. 12 Earthquake Location Lab Answer Key (PDF) - skislah.edu Web12-earthquake-location-lab-answer-key 1/1 Downloaded from skislah.edu.my on February 15, 2023 by guest 12 Earthquake Location Lab Answer Key Right here, we have countless ebook 12 Earthquake Location Lab Answer Key and collections to check out. Though the distance to the epicenter can be determined using a travel-time graph, the direction cannot be told. One seismogram indicates the distance to the epicenter. minutes and P waves 8 minutes to Also called seismometer. Seismic Waves. 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"? lag time. 0000078100 00000 n
Have students click on the Earthquakes Living Lab hyperlink in the top left in the earthquakes section. 0000004060 00000 n
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Earthquakes and Seismic Waves Key Concepts . Collect any giveaways for the students, such as earthquake posters or plate tectonic fliers. How are S and P waves used to determine how far away epicenters are? Though they may weaken with distance, seismographs are sensitive enough to still detect these waves. Expert Answer. Locating Earthquake Epicenter Worksheet Answer Key Free K-12 standards-aligned STEM curriculum for educators everywhere. How can you locate an earthquake's epicenter? Locating_an_epicenter_activity - Activity4 - Course Hero Practice with Triangulation: Locating an earthquake epicenter. 1. This investigation is considered generally safe to do with students. Resources. Do you agree with this alignment? 1. 0000106240 00000 n
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How does the lag time change as you get farther and Once three seismographs have been located, find the time interval between the arrival of the P-wave and the arrival of the S-wave. The Richter scale was created in the 1930s to assign a single number to quantify the energy released during earthquakes. Another method of locating an earthquake is to use the P-wave arrival-time minus origin-time (P - O) interval instead of distance. Learn more How Can I Locate the Earthquake Epicenter? from the epicenter will be 14 8. Use Figure 5 and the travel-time graph in Figure 4 to determine . Subjects: 0000001408 00000 n
Click for facts and worksheets in PDF! Make an overhead copy of each of the handouts. Lab 8 - earthquake lab - Lab: Locating the Epicenters of Earthquakes epicenter: A point on the Earth's surface that is directly above the place where the underground forces of an earthquake originate. This section explains what earthquakes and faults are and what causes earthquakes. Objective Use data from seismograms to locate the epicenters of earthquakes. To abbreviate, use the symbol M (a capital M, plain text, no sub/superscripts) expressed to the nearest 0.1. Introduction: Before student pairs look at the Earthquakes Living Lab, direct them to complete the Engage section of the Finding Epicenters and Measuring Magnitudes Worksheet, which asks them to apply any prior knowledge and/or speculate as to what the Richter magnitude scale is and what an epicenter is. 12), Analyze and interpret data about natural hazards using direct and indirect evidence
The USGS and its partners monitor and report earthquakes, assess earthquake impacts and hazards, and . Every earthquake is recorded on numerous seismographs located in different directions. Zip. 0000003855 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. approximate period of the surface waves in seconds? 0000009174 00000 n
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. Read through the sections What Is Seismology and What Are Seismic Waves?, Where Do Earthquakes Happen?, and Why Do Earthquakes Happen? to answer the following questions: What is the difference between S and P waves? A little under 30 seconds, maybe around 26 seconds. seismograph: An instrument that measures motions of the ground, including those of seismic waves generated by earthquakes. '
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For example, the western United States has earthquakes more frequently and on a larger scale than the eastern part of the country. If a quake is far from the seismograph, the P-waves arrive long before the S-waves. : 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. gov For online instructions and current fees click here. Every year, earthquakes cause death and destruction worldwide. Locating an Epicenter through Triangulation of Seismic Data- Remote/Hybrid/Live. %PDF-1.3
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Practicing this technique, the students work several problems on a map of the US. 0000005149 00000 n
Scientists use triangulation to find the epicenter of an earthquake. Activity4:LocatinganEarthquakeEpicenter Objectives:Ifyoucompletealltheproblems,youshouldbeableto: Identif HTn0MmcHCB Step 1: ans- d) 65 seconds Ste . different types of seismic waves. Success is figuring out that the estimated magnitude is 5.9. earthquake - shaking and vibration of Earth's surface. Locating an Earthquake's Epicenter - American Geosciences Institute Cross), Give Me Liberty! 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. Mapping the history of natural hazards in a region, combined with an understanding of related geologic forces can help forecast the locations and likelihoods of future events. Locating Earthquake Epicenter Teaching Resources | TPT The earthquake occurred somewhere along that circle. Where the 3 circles intersect is the approximate location to the epicenter of the earthquake. 61 0 obj
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It's a logarithmic scale from 1 to 10 with each succeeding level representing 10 times as much energy as the last. 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. MS-ESS3-2.
4. Seismograms Analyze and interpret data on natural hazards to forecast future catastrophic events and inform the development of technologies to mitigate their effects. To locate the epicenter of the earthquake, seismologists use the .
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