Three seismographs are needed. 0000002094 00000 n Epicenter is the location on the surface of the Earth directly above where the earthquake starts. The Richter scale was created in the 1930s to assign a single number to quantify the energy released during earthquakes. Activity4:LocatinganEarthquakeEpicenter Objectives:Ifyoucompletealltheproblems,youshouldbeableto: Identif determine the epicenter using the S P (S minus P) method. 9 - Also commonly termed the focus. 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. 0000001893 00000 n S wave: The second seismic wave of an earthquake. It is slower than the same earthquake's P wave and cannot travel through liquids. The earthquake occurred somewhere along that circle. E}g7$i(=K)"aj%v]vPcYloi@X3noGX{[XucOgkdF.>Ym^fwrQf;8_Nok3w\;?n_Hhc?>k\o[%DgwJ'3d.lTqDy_aJw! 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. 0000103591 00000 n Alignment agreement: Do you agree with this alignment? earthquake. All the arcs should intersect at a common point - the epicenter. What about P waves? Make an overhead copy of each of the handouts. Even though the scale formulae are different, MMS retains the familiar continuum of magnitude values defined by the older scale. time for any point that is 3,000 miles Must engineers be content with mitigating disasters, instead of preventing them? Was there an initial quake followed by smaller quakes? Section A - Operator Information 1. 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. The spot where those three circles intersect is the epicenter (Figure 13.12). inch = 500 km. Several thousand seismographs exist at locations around the planet, continuously measuring abnormalities in the Earth's movement. graph. Subject Areas: Thus, the Richter scale is used for measuring small earthquakes (3.5 M or less), while the moment magnitude scale is used for measuring stronger earthquakes (3.5 M or higher). A.45 seconds B.50 seconds C.55 seconds D.65 seconds Answer Key: D Moment magnitude scale. 0000001777 00000 n Describe the process of triangulation to locate an epicenter. In order to determine the location of an earthquake epicenter, seismographsfrom at least three different places are needed for a particular event. 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. 61 0 obj <> endobj xref Have students click on the Earthquakes Living Lab hyperlink in the top left in the earthquakes section. aqmd. How does the lag time change as you get farther and 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. Resources. 5 4. minutes = 6 minutes. Short for "secondary wave" or "shear wave." (i. 3000 miles. U.S. Geological Survey, U.S. Department of the Interior. (, Have any of you ever experienced an earthquake or know anyone who has? 0000001978 00000 n Add to Library. HTn0"H@w=s(vxk8OM1px-{$_!o5|CS7RPr#V(0CUa%ZkuT9t};D Jj=.9,z!#@n5YCu>R88tfFRX=iRK Send activity 4 locating an earthquake epicenter worksheet answers via email, link, or fax. The simulation renders three circles on a map and directs students to find the epicenter. A seismograph is securely mounted onto the surface of the earth so that when the earth shakes, the entire unit shakes with it EXCEPT for the mass on the spring, which has inertia and remains in the same place. 12), Seek, evaluate, and use a variety of specialized resources available from libraries, the Internet, and the community to find scientific information on Earth's history 0000001862 00000 n Great-circle arcs are drawn on the globe using the distance of the earthquake to the station as a radius. 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 . Richter magnitude scale: An earthquake measurement scale created in the 1930s to assign a single number to quantify the energy released during earthquakes. (Grades 9 - 12). seismograph: An instrument that measures motions of the ground, including those of seismic waves generated by earthquakes. 11 minutes elapsed between the first P wave and the last measurable surface wave. 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 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. Triangulation is required to determine exactly where it happened. 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. All rights reserved. 0000002658 00000 n lag time. waves from a distant earthquake. Some places are more prone to earthquakes than others. Reading Strategy. Looking at the nomogram, students click on each location data point to see where the three lines intersect to read the estimated magnitude. Thanks for your feedback! Choose an answer and hit 'next'. Legal. Activity: Locating an Earthquake Epicenter Lecture 3 Damage from the earthquake was widespread, but the actual location of the earthquake (the epicenter) Figure 13.10). Last modified July 18, 2012. 0000002383 00000 n 0000009174 00000 n Locating Earthquake Epicenter Lab - Triangulation sheet for students and/or teachers to use (Slide 6), and answer key (Slide 7). 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! Quick Tips. The period of a wave is the time between two adjacent wave peaks. 0000033429 00000 n 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. (Listen to student ideas.) 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). farther from the epicenter of an earthquake? How is the magnitude of an earthquake determined? longer or shorter). They make a model of a seismographa measuring device that records an earthquake on a seismogram. What is the time lag for the Seattle, Washington, seismic station? Seismic Waves. At least 3 earthquake recording stations are required to find the location of the earthquake epicenter. Mr Gneiss. The living lab presents earthquake information through a focus on four active seismic areas and historic earthquakes in those areas. 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). The seismometers are shown as green dots. Upload a document. 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 Why might the triangulation method not always produce an exact point (other than your measurement errors)? The farther a station is from the 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. A circle with a radius of the distance to the quake can be drawn. If a quake is near the seismograph, the S-waves arrive shortly after the P-waves. The time The point beneath Earth's surface where rock breaks under stress and causes an earthquake. What is an earthquake? P and Swaves are body waves and travelthrough the interior of the earth. 0000001408 00000 n HtA1D41`s(GME$Ke*YdEOYf2-:r. 0000004769 00000 n 1. 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. 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. P wave. 0000006538 00000 n 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. This opens a new window to Michigan Techs UPSeis informational site about earthquakes and seismology. 0000001746 00000 n Sharing Information/Thinking Ahead: In the Evaluate section of the worksheet, student pairs are asked to compose answers to two questionswhether they think seismology is a reliable science and ways seismic data is useful for engineers. velocity, amplitude, and frequency of the Cross), Give Me Liberty! (Grades 0000053998 00000 n Use the process of triangulation to locate an earthquake's epicenter. If a quake is far from the seismograph, the P-waves arrive long before the S-waves. Students learn what causes earthquakes, how we measure and locate them, and their effects and consequences. 61 33 Every earthquake is recorded on numerous seismographs located in different directions. Ch Person/Attorney Filing: - Superior Court - Maricopa County - superiorcourt maricopa. 5. focus - the point within Earth where an earthquake originates. 15 Bill Nye - Earthquakes Worksheet Key Earthquakes occur when the big pieces of earth's crust, called plates, move a little. 0000001861 00000 n This section explains what earthquakes and faults are and what causes earthquakes. How does the Mad Scientist. The Earthquakes Living Lab gives students the chance to track earthquakes across the planet and examine where, why and how they are occurring. The real-world earthquake data is viewable via a graphical interface using a scaling map. Copyright 2023. 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. surface wave? 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. seismogram. consider a seismograph stationed 3, Please answer the following questions using the earthquake video shake, shake, shake. 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. minute apart, represent the passage of time First locate and mark the three seismic stations on the world map provided below. gov For online instructions and current fees click here. Pwaves have the greatest velocity and reach theseismic station first. THREE SEISMOGRAMS Seismogram A - New York, NY 1 minute 1. Nov 2, 2020 Triangulation is used to determine the location of an earthquake. Wikipedia, The Free Encyclopedia. In a concluding class discussion, have groups share their ideas about engineering and one new thing they learned about earthquakes. hb```f``Rl@ (l"`+uk?0.a~@6Vm;| G3f`75@v@Wz|A4#w9{(` ) trailer <<320C1F98F8FF4795B5CCB8D9E9A0B99B>]/Prev 812054/XRefStm 1396>> startxref 0 %%EOF 93 0 obj <>stream Share with Classes. Explains how to find an earthquake epicenter using at least three seismograph stations. P and Swaves are body waves and travel, through the interior of the earth. 0000079769 00000 n How do we determine the epicenter of an earthquake? Key Facts & Information. (Source: USGS). The epicenter is the point directly above it at the surface of the Earth. If you complete all the problems, you should be able to: Identify P, S, and surface waves on a simple seismogram. !5(~q* at that station. So the difference in the P- and S-wave arrival times determines the distance between the epicenter and a seismometer. In the ASN, standards are hierarchically structured: first by source; e.g., by state; within source by type; e.g., science or mathematics; between arrival of P and S waves is called 0000003966 00000 n Earthquakes occur along faults, which are cracks in the Earths crust that build tension. 4. 107 0 obj <>stream to the lag time measured at this location? Scientists use triangulation to find the epicenter of an earthquake. Using 3 seismograms the students will be able to triangulate the epicenter of an earthquake. The, amount of time that passes between the Pwave arrival and the Swave arrival is. Please answer the following questions using the earthquake video - shake, shake, shake. As you may know, people have look numerous times for . pen recorded the arrival of P, S, and surface How does distance from the epicenter affect the magnitude (height) of the seismograph reading? 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. Pwaves have the greatest velocity and reach the, seismic station first. 4. fault - a fracture in Earth's crust where the rocks on either side have moved. 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Conclude the activity with a class discussion (and perhaps homework questions) to share ideas and answers, as described in the Assessment section. 87 0 obj <> endobj xref 87 28 0000000016 00000 n Earthquakes Living Lab: Finding Epicenters & Measuring Magnitudes. 0000002009 00000 n 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. 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. This investigation is considered generally safe to do with students. 1. Seismic stations detect earthquakes by the tracings made on seismographs. 0000003254 00000 n Analyze and interpret data on natural hazards to forecast future catastrophic events and inform the development of technologies to mitigate their effects. important in helping seismologists determine the epicenter of the earthquake. 9 - 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. atrial depolarization. 0000000956 00000 n El trmino tambin puede hacer referencia al ttulo o nombre de alguien a quien se di, Practica II - De Psicologian 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. epicenter, the longer the lag time measured 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. The hypocenter is the point within the earth where an earthquake rupture starts. =Cv :~4yrXP 62{_,*Uq/O-oUNBr-$y~:G},#3e^CS6U*_zVGY7ZNUWk2f?? {%!,"{u5E&OOqA_"/uxn-kx+Vz*EQb)Q Review their answers to assess their base knowledge of the subject matter. question 1 of 3. 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. The longer the time between the arrival of the P-wave and S-wave, the farther away is the epicenter. P wave: The first seismic wave of an earthquake. X!.43p2t!}SLx-3z.KN4X+H\+vk? Triangulation to Locate an Earthquake By Earthquake Hazards Original Thumbnail Medium Detailed Description Triangulation can be used to locate an earthquake. This is determined by the P-and S-wave arrival times. Do you agree with this alignment? Tips: Make sure students are reading the S waves and not the P waves. One seismogram indicates the distance to the epicenter. A single recording station can only calculate distance, but not direction; to cover all possibilities, a complete circle is drawn around that station. In order to determine the location of an earthquake epicenter, seismographs from at least three different places are needed for a particular event. 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. S-P interval: The time interval between the arrivals of P and S waves. Tracings made at three separate seismic stations are needed to locate an earthquake epicenter. Every year, earthquakes cause death and destruction worldwide. Activity 4 Locating An Earthquake Epicenter Answers: Fill Out & Sign . Details. 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. and S waves to travel any distance up to In the U.S., earthquake measurements under the MMS (those of magnitude 3.5 or higher) are still commonly erroneously referred to by the general public and media as being on the Richter scale, due to more familiarity with the Richter scale. Direct student pairs to independently complete the tutorial/simulation to find an epicenter location via the triangulation method and compute the earthquake magnitude: The simulation directs students to look at three simplified seismograms from seismic stations in Chile (Talca, Santiago, Osorno) and select the correct measurements of the S-P intervals. Locating an Epicenter through Triangulation of Seismic Data- Remote/Hybrid/Live. One seismogram indicates the distance to the epicenter. 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. 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.