Once three seismographs have been located, find the time interval between the arrival of the P-wave and the arrival of the S-wave. 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. 15 Bill Nye - Earthquakes Worksheet Key Earthquakes occur when the big pieces of earth's crust, called plates, move a little. Thanks for your feedback! 5 4. First locate and mark the three seismic stations on the world map provided below. Divide the class into student pairs, and have them assemble at their computers with journals/paper and writing instruments. Choose an answer and hit 'next'. U.S. Geological Survey, U.S. Department of the Interior. Answer the following questions in the spaces provided. 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. 0000000016 00000 n
Use this information to complete the following. time for any point that is 3,000 miles A.45 seconds B.50 seconds C.55 seconds D.65 seconds Answer Key: D (Grades 9 - 12). 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. After this activity, students should be able to: Each TeachEngineering lesson or activity is correlated to one or more K-12 science,
The answer is the San Andreas Fault. 01. trailer
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The Earthquakes Living Lab gives students the chance to track earthquakes across the planet and examine where, why and how they are occurring. What about P waves? 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) . 0000003991 00000 n
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. Locating Epicenter Lab Worksheet (1).docx, Updating Patient Registration B at 08_10_2022 03_03 PM.pdf, You need to deploy an Azure environment that meets the company migration plan, Step 1 of 2 Program 1 A Simple Python Program Welcome with Two Messages Running, More women in academia report polarization assimilation in male skewed and male, A TACACS B RADIUS C Kerberos D SAML Correct Answer D QUESTION 321 A network, PTSD in Children and Adolescents - Copy - Copy - Copy - Copy.docx, Effects of Excitation and Prime Mover Control The excitation control helps to, D1 Fundamental security design principles.docx, Question 5 Correct Mark 100 out of 100 Remove flag Question 6 Correct Mark 100, Thomas Concurrence broadly attacked current NDD Federal gov should be allowed to, 769 Water at 15C is to be heated to 65C by passing it over a bundle of 4 m. Course Hero is not sponsored or endorsed by any college or university. The vertical lines, spaced one Practice with Triangulation: Locating an earthquake epicenter. 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. cCV&0Lw1~c\4QA!{q:
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Direct students to finish the activity by completing the. To accurately locate an earthquake epicenter, records from three. Three seismographs are needed. Activity4:LocatinganEarthquakeEpicenter Objectives:Ifyoucompletealltheproblems,youshouldbeableto: Identif HTAn What is the approximate period of the surface waves in seconds? https://people.wou.edu/~taylors/gs104/lab5key.pdf Locating Earthquake Epicenters | CK-12 Foundation Apr 8, 2020 . Use mathematical representations to support a claim regarding relationships among the frequency, wavelength, and speed of waves traveling in various media. 0000002250 00000 n
Nov 2, 2020 Triangulation is used to determine the location of an earthquake. lag time. 0000053998 00000 n
Answer Key: Lab 5 Earthquakes - Find People EARTHQUAKES: Epicenter Determination and Seismic Waves . The western U.S. has more faults than the eastern U.S., and therefore the western U.S. has more earthquakes. : 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. How does the period of the P waves compare to the period of the surface waves? The USGS now uses the MMS to estimate magnitudes for all modern large earthquakes. Earthquakes & Volcanoes Test Review Answers. The point where your ruler crosses the middle line on the chart marks the magnitude (strength) of the earthquake. This is determined by the P-and S-wave arrival times. What is an earthquake? It's a logarithmic scale from 1 to 10 with each succeeding level representing 10 times as much energy as the last. In order to determine the location of an earthquake epicenter, seismographsfrom at least three different places are needed for a particular event. Sixty-seven people lost their lives, and property damage was estimated at $6 billion. Book: Laboratory Manual for Introductory Geology (Deline, Harris & Tefend), { "13.01:_Introduction" : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.
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Last updated November 26, 2013. Describe the logarithmic nature of the earthquake magnitude scale. You will receive your score and answers at the end. HS]o01j6R0iMm4U=wL8]BE< 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. H\0y travel 3,000 miles. 0000002094 00000 n
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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. %PDF-1.3
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After reading about earthquakes, open a new window to an Earthquake Simulator at, Follow the simulation instructions. Tracings made at three separate seismic stations are needed to locate an earthquake epicenter. Figure 8. d>(ZvO= During an earthquake, seismic waves are sent all over the globe. Analyze and interpret data on natural hazards to forecast future catastrophic events and inform the development of technologies to mitigate their effects. Today, most seismologists no longer follow Richter's original methodology because it does not give reliable results when applied to stronger earthquakes and it was not designed to use data from earthquakes recorded at epicentral distances greater than ~600 km. Tips: Make sure students are reading the S waves and not the P waves. Every earthquake is recorded on numerous seismographs located in different directions. 0000005081 00000 n
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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? 74 Earthquake Activity: Locating the Epicenter and Time of Earthquake . Accessed December 11, 2013. http://en.wikipedia.org/wiki/Moment_magnitude_scale, Novak, Gary. Locating an Epicenter through Triangulation of Seismic Data- Remote/Hybrid/Live. Must engineers be content with mitigating disasters, instead of preventing them? 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. Epicenter Location on Earth's surface directly above the focus of the earthquake 5. What is the time lag for the Seattle, Washington, seismic station? 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
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Copyright USGS http://earthquake.usgs.gov/learn/kids/eqscience.php. The process is called triangulation. Geologists use seismic waves to locate an earthquake's epicenter. (Source: USGS, Wikipedia). to the lag time measured at this location? So the difference in the P- and S-wave arrival times determines the distance between the epicenter and a seismometer. It is called triangulation because a triangle has three sides, and it takes three seismographs to locate an earthquake. Explain the difference between S and P waves, and how their time interval is used to determine the epicenter location. You can also download it, export it or print it out. 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. Facility Name Busine Child ren Information Child Name C. Child Social Security Number Type of Case being filed - Check only one category. If your seismograph station is Next, have student groups answer the eight questions in the. 1. hb```b````e``n`d@ A
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vILZ*|%6mD! 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. gov For online instructions and current fees click here. 0000006984 00000 n
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Use of the TeachEngineering digital library and this website constitutes acceptance of our Terms of Use and Privacy Policy. 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. View Notes - Locating_an_epicenter_activity from SCIENCE Earth Scie at Toms River High North. The distance is in kilometers. They use three seismographs in a process called triangulation to determine earthquake epicenters. (Grades
Please answer the following questions using the earthquake video shake, shake, shake. 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. 1. 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. 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. In a concluding class discussion, have groups share their ideas about engineering and one new thing they learned about earthquakes. earthquake though). 3000 miles. 12), Evaluate ways that technology can impact individuals, society, and the environment. Of the four Earthquakes Living Lab seismic areas, choose the "Chile" box, as shown in Figure 3. Swaves arrive at the seismic station after the Pwaves. (from left to right). Students learn about the types of seismic waves produced by earthquakes and how they move through the Earth. 0000004224 00000 n
Use the process of triangulation to locate an earthquake's epicenter. What is an earthquake? The, amount of time that passes between the Pwave arrival and the Swave arrival is. All the arcs should intersect at a common point - the epicenter. 0000031066 00000 n
How is the magnitude of an earthquake determined? Place a ruler (or straight edge) on the chart between the points you marked for the distance to the epicenter and the amplitude. 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. Success is figuring out that the estimated magnitude is 5.9. Geology Labs On-Line, Department of Geological Sciences, California State University, Los Angeles, CA. Engineers first determine where earthquakes are likely to occur, and how severe they are likely to be. Lab Exercise #2: Locating the Epicenter of an Earthquake In this lab exercise, you will locate the epicenter of an earthquake. Show students some of the numerous online animations comparing the movements of P and S waves. 83 0 obj
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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 lag time for any Accessed December 11, 2013. http://earthquake.usgs.gov/aboutus/docs/020204mag_policy.php. Another method of locating an earthquake is to use the P-wave arrival-time minus origin-time (P - O) interval instead of distance. 0 500 1000 1500 2000 2500 3000 trailer
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Point on Earth's surface directly above an earthquake's focus. to the lag time measured at this location? 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. minute apart, represent the passage of time P and Swaves are body waves and travelthrough the interior of the earth. Adjust the timing to the class period, remembering that you will need time to introduce the investigation, clean up afterwards, and re-set up for the next class (if you are working with more than one class). 0000001675 00000 n
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If you complete all the problems, you should be able to: Identify P, S, and surface waves on a simple seismogram. Add to Library. In order to determine the location of an earthquake epicenter, seismographs from at least three different places are needed for a particular event. from the epicenter will be 14 8. HlRnQ?R\>BjK' Share with Classes. Do you agree with this alignment? 3. 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"? question 1 of 3. important in helping seismologists determine the epicenter of the earthquake. Then from the same recordings they determine the earthquake's magnitude, an estimate of the amount of energy released during the earthquake. HtA1D41`s(GME$Ke*YdEOYf2-:r. 1,000 miles from the epicenter of an earthquake? Also commonly termed the focus. Expert Answer. 6. Earthquakes can also cause tsunamis, which are very large waves that can damage coastlines and put coastal residents in danger. %%EOF
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Once three seismographs have been located, find the time interval between the arrival of the P-wave . earthquakes. Based on your answers to the previous question, what is the lag time for locations that are 0000003254 00000 n
2. Epicenter is the location on the surface of the Earth directly above where the earthquake starts. earthquake - shaking and vibration of Earth's surface. 0000001777 00000 n
Focus (aka Hypocenter) is the location in the Earth where the earthquake starts. waves from a distant earthquake. Doing this generates an S-P interval graph (time vs. distance, called the travel-time curve graph) from which they determine and select three epicentral distances. Reading Strategy. 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. The farther away the epicenter is, the greater the difference . If you can't find an answer to your question, please contact us. (Source: USGS, Wikipedia). 0000103591 00000 n
Focus. Subjects: Earth Sciences, General Science Grades: 5th - 8th Types: Activities, Laboratory The calculated distance from each seismometer to the earthquake is shown as a circle. Even though the scale formulae are different, MMS retains the familiar continuum of magnitude values defined by the older scale. How can you locate an earthquake's epicenter? endstream
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Millions of people witnessed the motion of the earthquake on television. If the lag time were measured at a location closer to the epicenter, how would it compare 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. Hand out the worksheets to the groups and direct them to read through the instructions. However, please review it for the specific setting, materials, students, and conventional safety precautions. P and Swaves are body waves and travel, through the interior of the earth. xb``d``Id`a`Ab@_ :iWGi>|q` 1. Success is figuring out that the epicenter is just off the coast of Chile, where the three circles intersect. Since the 1970s, the use of the Richter magnitude scale has largely been replaced in the scientific community by the moment magnitude scale (MMS). Three seismographs are needed. minutes and P waves 8 minutes to The spot where those three circles intersect is the epicenter (Figure 13.12). 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. Sign, fax and printable from PC, iPad, tablet or mobile with pdfFiller Note-taking Worksheet. As discussed earlier in this lesson, this method of determining the epicenter of an . Triangulation is required to determine exactly where it happened. Run through the investigation yourself and record the data, just to see how long it takes. (Listen to student ideas.) S waves. This is determined by the P-and S-wave arrival times. Mark the first arrival of the swave on each seismogram. 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. If a quake is far from the seismograph, the P-waves arrive long before the S-waves. (, 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. 0000030968 00000 n
In Figure 13.9, there is an example seismogram from a station that includes a minor earthquake. 0000004060 00000 n
Use mathematical representations of phenomena or design solutions to describe and/or support claims and/or explanations. Mr Gneiss. 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! inch = 500 km. Where the 3 circles intersect is the approximate location to the epicenter of the earthquake. 0000004511 00000 n
Triangulation to Locate an Earthquake By Earthquake Hazards Original Thumbnail Medium Detailed Description Triangulation can be used to locate an earthquake. Material is sheared side to side, perpendicular to the direction of wave propagation. PS: We do not share personal information or emails with anyone. There are two sets of data and maps to do this activity/ lab for than once. www.teachengineering.org/activities/view/csm_findingepicenters_activity1, Search curriculum by Common Core standards, http://www.teachengineering.org/livinglabs/earthquakes/, Click to view other curriculum aligned to this Performance Expectation, Finding Epicenters and Measuring Magnitudes Worksheet, Finding Epicenters and Measuring Magnitudes (docx), Finding Epicenters and Measuring Magnitudes (pdf), Finding Epicenters and Measuring Magnitudes Example Answers (docx), Finding Epicenters and Measuring Magnitudes Example Answers (pdf), Earthquakes Living Lab: FAQs about P Waves, S Waves and More, Seismic Waves: How Earthquakes Move Through the Earth, Earthquakes Living Lab: Designing for Disaster, http://www.teachengineering.org/livinglabs/index.php, https://www.newpathonline.com/api_player/enus_54_6304/LXX/index.html. 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. 0000078100 00000 n
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. To complete the activity, some prior . 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. For example,
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What did it feel like? Make arrangements so that each student group has a computer with Internet access. Scientists use triangulation to find the epicenter of an earthquake. Subjects: Wikipedia, The Free Encyclopedia. If a quake is far from the seismograph, the P-waves arrive long before the S-waves. When seismic data is collected from at least three different locations, it can be used to determine the epicenter by where it intersects. HTn0MmcHCB m>r/Q[6 within type by subtype, then by grade, etc. The period of P waves is shorter, than the period of surface waves. epicenter of an earthquake, how 9 -
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Review their answers to assess their base knowledge of the subject matter. How does distance from the epicenter affect the S-P time interval? Locating Earthquake Epicenter Lab Answer Key buysms de. *The NGSS logo is a registered trademark of WestEd. Why might the triangulation method not always produce an exact point (other than your measurement errors)? While no one can predict earthquakes, knowing the intensities, frequencies and locations of past earthquakes and fault planes helps us to better anticipate the locations and forces to expect, so we can do our best to prepare our communities and infrastructure to withstand them safely. Virtual Earthquake (tutorial/simulation) 1996. Copyright 2023. 9 -
These natural disasters may be mitigated, however, by insightful and creative engineering. at that station. graph. The distance to the earthquake epicenter is then determined using the "Earthquake P-Wave and S-Wave Travel Time" graph. Have students click on the Earthquakes Living Lab hyperlink in the top left in the earthquakes section. 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. approximate period of the surface waves in seconds? Many updates and improvements! endstream
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