If less precision is desired, precede M with a tilde, such as "M ~7" or "magnitude ~6.8.". Empirical evidence is required to differentiate between cause and correlation and make claims about specific causes and effects. !D,X2:azTG)kPT~Mj 4>d w@O'. seismogram. minutes? Alignment agreement: Wikipedia, The Free Encyclopedia. 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. 1,000 miles from the epicenter of an earthquake? Earthquakes & Volcanoes Test Review Answers. (Source: USGS, Wikipedia). !5(~q* 0000001533 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. Graphs, charts, and images can be used to identify patterns in data. Free K-12 standards-aligned STEM curriculum for educators everywhere. 0000001736 00000 n (, 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. minute apart, represent the passage of time 0000002009 00000 n 0000078100 00000 n S waves. gov For online instructions and current fees click here. After this activity, students should be able to: Each TeachEngineering lesson or activity is correlated to one or more K-12 science, Copyright USGS http://earthquake.usgs.gov/learn/kids/eqscience.php. Thanks for your feedback! 0000033429 00000 n You learned that seismologists determine the distance to the earthquake epicenter using the difference between S and P wave arrival times. All the arcs should intersect at a common point - the epicenter. hb```f``Rl@ (l"`+uk?0.a~@6Vm;| G3f`75@v@Wz|A4#w9{(` ) 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. located 1,000 miles from the technology, engineering or math (STEM) educational standards. They use three seismographs in a process called triangulation to determine earthquake epicenters. 9 - Click for facts and worksheets in PDF! earthquake though). Describe the process of triangulation to locate an epicenter. approximate period of the surface waves in seconds? All rights reserved. P and Swaves are body waves and travelthrough the interior of the earth. 0000002840 00000 n Use mathematical representations of phenomena or design solutions to describe and/or support claims and/or explanations. If you complete all the problems, you should be able to: Identify P, S, and surface waves on a simple seismogram. Last updated November 26, 2013. 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. and S waves depends on the distance from the epicenter of the answer the following question. Every earthquake is recorded on numerous seismographs located in different directions. 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. Point on Earth's surface directly above an earthquake's focus. The USGS and its partners monitor and report earthquakes, assess earthquake impacts and hazards, and . 1. 0000002094 00000 n distance = travel time for S waves Focus (aka Hypocenter) is the location in the Earth where the earthquake starts. This is determined by the P-and S-wave arrival times. Millions of people witnessed the motion of the earthquake on television. See Answer. How far do S waves travel in 5 Finding the epicenter worksheet answer key. Ask students what fault they think caused this earthquake. When an earthquake strikes, P waves arrive at a seismograph rst and S waves next. Students also investigate which structural designs are most likely to survive an earthquake. Develop a solution to a technological problem that has the least negative environmental and social impact. (Figure 3):. Analyze and interpret data on natural hazards to forecast future catastrophic events and inform the development of technologies to mitigate their effects. 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! Locating an Epicenter through Triangulation of Seismic Data- Remote/Hybrid/Live. 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. Figure 1 is a simplified example of a Success is figuring out that the estimated magnitude is 5.9. hbbd``b`$C`q9 X_$_g`bdxc`X This opens a new window to Michigan Techs UPSeis informational site about earthquakes and seismology. 12), Evaluate ways that technology can impact individuals, society, and the environment. within type by subtype, then by grade, etc. E}g7$i(=K)"aj%v]vPcYloi@X3noGX{[XucOgkdF.>Ym^fwrQf;8_Nok3w\;?n_Hhc?>k\o[%DgwJ'3d.lTqDy_aJw! 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. 0000000016 00000 n 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. Run through the investigation yourself and record the data, just to see how long it takes. Key Facts & Information. 0000030968 00000 n EARTHQUAKES: Epicenter Determination and Seismic Waves First locate and mark the three seismic stations on the world map provided below. What data is used to determine magnitude? The Earthquakes Living Lab gives students the chance to track earthquakes across the planet and examine where, why and how they are occurring. (Grades 9 - 12). Where the 3 circles intersect is the approximate location to the epicenter of the earthquake. 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. First locate and mark the three seismic stations on the world map provided below. How many minutes elapsed between the arrival of the first P wave and the last measurable 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 farther from the epicenter of an earthquake? earthquake lab lab: locating the epicenters of earthquakes objective measurable learning outcomes use data from seismograms to locate the epicenters of Skip to document Ask an Expert Sign inRegister Sign inRegister Home Ask an ExpertNew My Library Discovery Institutions Western Governors University Southern New Hampshire University 0000001978 00000 n distance from transducer to the focal point. 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 magnitude determination is based on seismic data. Geology Labs On-Line, Department of Geological Sciences, California State University, Los Angeles, CA. 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. m>r/Q[6 Of the four Earthquakes Living Lab seismic areas, choose the "Chile" box, as shown in Figure 3. Accessed December 11, 2013. http://www.sciencecourseware.com/virtualearthquake/, USGS Earthquake Magnitude Policy (implemented on January 18, 2002). Student exploration Graphing Skills SE Key Gizmos Explore Learning. They make a model of a seismographa measuring device that records an earthquake on a seismogram. The three seismograms in this activity are unfi ltered station records from a single event that occurred on August 1, 1999. : 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. S-P interval: The time interval between the arrivals of P and S waves. To do this, have the students use, Find the epicenter of the earthquake on the map (. 0000030240 00000 n 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. The lag time for any 0000106240 00000 n You will analyze the records and locate the earthquake using a method known What is an earthquake? In this 1-to-10 logarithmic scale, each succeeding level representing 10 times as much energy as the last. Then do the same for the S-wave. graph. Civilization and its Discontents (Sigmund Freud), Educational Research: Competencies for Analysis and Applications (Gay L. R.; Mills Geoffrey E.; Airasian Peter W.), Brunner and Suddarth's Textbook of Medical-Surgical Nursing (Janice L. Hinkle; Kerry H. Cheever), Psychology (David G. Myers; C. Nathan DeWall), The Methodology of the Social Sciences (Max Weber), Business Law: Text and Cases (Kenneth W. Clarkson; Roger LeRoy Miller; Frank B. Locating an Epicenter Activity - Arkansas Geological Survey Do you agree with this alignment? Book: Laboratory Manual for Introductory Geology (Deline, Harris & Tefend), { "13.01:_Introduction" : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()", "13.02:_The_Epicenter,_Focus,_and_Waves" : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()", "13.03:_Seismology" : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()", "13.04:_Locating_an_Earthquake_Epicenter" : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()", "13.05:_Lab_Exercise_(Part_A)" : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()", "13.06:_Hazards_from_Earthquakes" : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()", "13.07:_Lab_Exercise_(Part_B)" : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()", "13.08:_Induced_Seismicity" : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()", "13.09:_Lab_Exercise_(Part_C)" : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()", "13.10:_Student_Responses" : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()" }, { "00:_Front_Matter" : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()", "01:_Introduction_to_Physical_Geology" : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()", "02:_Earth\'s_Interior" : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()", "03:_Topographic_Maps" : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()", "04:_Plate_Tectonics" : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()", "05:_Water" : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()", "06:_Climate_Change" : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()", "07:_Matter_and_Minerals" : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()", "08:_Igneous_Rocks" : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()", "09:_Volcanoes" : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()", "10:_Sedimentary_Rocks" : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()", "11:_Metamorphic_Rocks" : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()", "12:_Crustal_Deformation" : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()", "13:_Earthquakes" : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()", "14:_Physiographic_Provinces" : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()", "zz:_Back_Matter" : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()" }, [ "article:topic", "showtoc:no", "license:ccbysa", "authorname:delineharristefend", "program:galileo" ], https://geo.libretexts.org/@app/auth/3/login?returnto=https%3A%2F%2Fgeo.libretexts.org%2FLearning_Objects%2FLaboratory%2FBook%253A_Laboratory_Manual_For_Introductory_Geology_(Deline_Harris_and_Tefend)%2F13%253A_Earthquakes%2F13.04%253A_Locating_an_Earthquake_Epicenter, \( \newcommand{\vecs}[1]{\overset { \scriptstyle \rightharpoonup} {\mathbf{#1}}}\) \( \newcommand{\vecd}[1]{\overset{-\!-\!\rightharpoonup}{\vphantom{a}\smash{#1}}} \)\(\newcommand{\id}{\mathrm{id}}\) \( \newcommand{\Span}{\mathrm{span}}\) \( \newcommand{\kernel}{\mathrm{null}\,}\) \( \newcommand{\range}{\mathrm{range}\,}\) \( \newcommand{\RealPart}{\mathrm{Re}}\) \( \newcommand{\ImaginaryPart}{\mathrm{Im}}\) \( \newcommand{\Argument}{\mathrm{Arg}}\) \( \newcommand{\norm}[1]{\| #1 \|}\) \( \newcommand{\inner}[2]{\langle #1, #2 \rangle}\) \( \newcommand{\Span}{\mathrm{span}}\) \(\newcommand{\id}{\mathrm{id}}\) \( \newcommand{\Span}{\mathrm{span}}\) \( \newcommand{\kernel}{\mathrm{null}\,}\) \( \newcommand{\range}{\mathrm{range}\,}\) \( \newcommand{\RealPart}{\mathrm{Re}}\) \( \newcommand{\ImaginaryPart}{\mathrm{Im}}\) \( \newcommand{\Argument}{\mathrm{Arg}}\) \( \newcommand{\norm}[1]{\| #1 \|}\) \( \newcommand{\inner}[2]{\langle #1, #2 \rangle}\) \( \newcommand{\Span}{\mathrm{span}}\)\(\newcommand{\AA}{\unicode[.8,0]{x212B}}\), status page at https://status.libretexts.org. Seismograms hWmo9+[+UH EkNB|6YiaVJ=cRh7{T1R,5LI1$K=s)XR&87@&$LTPLutlcyNuzjf--\?qaXZM&HM.Eg"HnTqSWqN0&~2kf0 Md|d&:zhe)7I? Review their answers to assess their base knowledge of the subject matter. This investigation is considered generally safe to do with students. 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. Use the graph to answer the questions that follow. Tips: Make sure students are reading the S waves and not the P waves. (5 minutes) Discuss how gathering information on epicenters can be applied. Learn more How Can I Locate the Earthquake Epicenter? inch = 500 km. 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. If a quake is far from the seismograph, the P-waves arrive long before the S-waves. Last modified July 18, 2012. Make arrangements so that each student group has a computer with Internet access. epicenter of an earthquake, how 1. Describe what the "magnitude" of an earthquake is. Overhead transparency of each of the handouts, Overhead projector (contact classroom teacher about this) and screen, Optional: overhead transparency or PowerPoint of, What do you know about the causes and impacts of Earthquakes? Looking at the nomogram, students click on each location data point to see where the three lines intersect to read the estimated magnitude. The travel-time graph trailer <<0444DE89825047A1A483C62E98F50868>]>> startxref 0 %%EOF 114 0 obj <>stream Once three seismographs have been located, find the time interval between the arrival of the P-wave . aqmd. What is the time lag for the Seattle, Washington, seismic station? A. Seismic waves-waves generated by an earthquake, can move the ground forward and back- answers the question. What types of engineers might use this data the most? (Grades Zip. Great exercise for Regents Earth Science. 0000001862 00000 n 12), computer or other device with Internet access, journal or writing paper for each student. To locate the epicenter of the earthquake, seismologists use the . Multiply the difference by 8.4 to estimate the distance, in kilometers, from the seismograph station to the epicenter. S wave: The second seismic wave of an earthquake. There are two sets of data and maps to do this activity/ lab for than once. The distance to the earthquake epicenter is then determined using the "Earthquake P-Wave and S-Wave Travel Time" graph. Shear wave from earthquake, moving slower than primary waves, through solid material only. Since the 1970s, the use of the Richter magnitude scale has largely been replaced in the scientific community by the moment magnitude scale (MMS). HTn {0,`K6}(J6]&Q^"!q57y_VQ9fp3/?Mc=KGsrrt:c\$Lh`4}>C>`qcSj0[YpZ_Su(322/N Z./$E )H %C[5ph[BUyGh7|!XPQiDjJ(|BNvylk+g;9G(#Aby>Jcf`XmnwtDD+;Z^I&Sb-4!7oi` L7 endstream endobj 78 0 obj <> endobj 79 0 obj <>stream 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. 1. 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. 17 Station St., Ste 3 Brookline, MA 02445. seismograph: An instrument that measures motions of the ground, including those of seismic waves generated by earthquakes. Using historical seismographs, engineers forecast the strength or magnitude of earthquakes and make predictions and determine building codes and safety protocols. Section A - Operator Information 1. Refer to the data table and use the difference in arrival times to determine the distance to the earthquake epicenter for Station 2. How are S and P waves used to determine how far away epicenters are? Step 1: ans- d) 65 seconds Ste . 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. 4. 0000004060 00000 n Sixty-seven people lost their lives, and property damage was estimated at $6 billion. 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 What was the lag time (in minutes) at this location? Describe the logarithmic nature of the earthquake magnitude scale. Earthquakes Living Lab: Finding Epicenters & Measuring Magnitudes. (Listen to student ideas.) d>(ZvO= P wave: The first seismic wave of an earthquake. Accessed December 11, 2013. http://earthquake.usgs.gov/aboutus/docs/020204mag_policy.php. The living lab presents earthquake information through a focus on four active seismic areas and historic earthquakes in those areas. Triangulation to Locate an Earthquake By Earthquake Hazards Original Thumbnail Medium Detailed Description Triangulation can be used to locate an earthquake. Finding the Epicenter Determine the epicenter distance from three different seismographs. Fill Locating The Epicenter Of An Earthquake Worksheet Answers, Edit online. The spot where those three circles intersect is the epicenter (Figure 13.12). 0000000956 00000 n Great-circle arcs are drawn on the globe using the distance of the earthquake to the station as a radius. 0000001143 00000 n Three seismographs are needed. 0000010002 00000 n ?t?s=Yt '_( endstream endobj 76 0 obj <>stream Tracings made at three separate seismic stations are needed to locate an earthquake epicenter. Figure 13.10). 0000005149 00000 n 5. focus - the point within Earth where an earthquake originates. PDF. Subjects: 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. epicenter, the longer the lag time measured (Grades Make an overhead copy of each of the handouts. 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. 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. 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. time for any point that is 3,000 miles 0000005081 00000 n 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. earthquakes. 0000004457 00000 n Using this resource students find the arrival times of P-waves and S-waves using a seismogram. The point beneath Earth's surface where rock breaks under stress and causes an earthquake. The distance is in kilometers. 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. ya{I;W@DgMN2:UtbT=*+cY1.8Vm(u3Zt"J @9TAjJH@H_F3n7\Srdw~gAR#JQGj`ueS! 13. 0000003254 00000 n 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. Use of the TeachEngineering digital library and this website constitutes acceptance of our Terms of Use and Privacy Policy. Earthquakes can also cause tsunamis, which are very large waves that can damage coastlines and put coastal residents in danger. Also called seismometer. In order to determine the location of an earthquake epicenter, seismographs from at least three different places are needed for a particular event. As discussed earlier in this lesson, this method of determining the epicenter of an . Earthquakes and Volcanoes. These distances are determined using a travel-time curve, which is a graph of Pand S-wave arrival times (see Figure 13.11). To complete the activity, some prior . 2. 500p;333aXb3 \a.1. You will receive your score and answers at the end. 3. epicenter - the point on Earth's surface directly above the focus, or origin, of an earthquake. We also acknowledge previous National Science Foundation support under grant numbers 1246120, 1525057, and 1413739. (Source: USGS). 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! The longer the time between the arrival of the P-wave and S-wave, the farther away is the epicenter. Thanks for your feedback! You can also download it, export it or print it out. Richter magnitude scale: An earthquake measurement scale created in the 1930s to assign a single number to quantify the energy released during earthquakes. 0000001604 00000 n Some places are more prone to earthquakes than others. endstream endobj startxref Reading Strategy. Edit your locating an earthquake epicenter worksheet answers online. Locating Earthquake Epicenter Lab Answer Key buysms de. 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. Based on your answers to the previous question, what is the lag time for locations that are P wave. 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"? 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 % Draw your signature, type it, upload its image, or use your mobile device as a signature pad. A minimum of three seismic stations is necessary to locate an epicenter. For this activity, select the "Chile" box. 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. 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. 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." As you read and complete the activity, take notes so you can complete the. Collect any giveaways for the students, such as earthquake posters or plate tectonic fliers. MS-ESS3-2. (Source: USGS, Wikipedia). minutes = 6 minutes. (, Have any of you ever experienced an earthquake or know anyone who has? endstream endobj 84 0 obj <> endobj 85 0 obj <> endobj 86 0 obj <>stream atrial depolarization. Thanks for your feedback! at that station. from the epicenter will be 14 8. ' 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 Though the distance to the epicenter can be determined using a travel-time graph, the direction cannot be told. Material is sheared side to side, perpendicular to the direction of wave propagation. After reading about earthquakes, open a new window to an Earthquake Simulator at, Follow the simulation instructions. For lower grades, just introduce the concepts of triangulation and the magnitude scale; a thorough understanding of P and S waves is not vital. Focal Depth. The western U.S. has more faults than the eastern U.S., and therefore the western U.S. has more earthquakes. determine the epicenter using the S P (S minus P) method. 0000055643 00000 n miles from the epicenter of an "`B(R6sj [CX7p+s =#;~ `'kA The vertical lines, spaced one, minute apart, represent the passage of time, (from left to right). Please answer the following questions using the earthquake video shake, shake, shake. Activity 4 Locating An Earthquake Epicenter Answers: Fill Out & Sign . Epicenter is the location on the surface of the Earth directly above where the earthquake starts.
