activity 4 locating an earthquake epicenter answer key
Students first triangulate the location of an earthquake's epicenter, then calculate its magnitude. What are those limits? 0000003254 00000 n
Finding the Epicenter. consider a seismograph stationed 3, This is determined by the P-and S-wave arrival times. The seismometers are shown as green dots. The period of a wave is the time between two adjacent wave peaks. 0000003966 00000 n
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. 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. 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. 87 0 obj
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Activity 4: Locating an Earthquake Epicenter Examining Seismograms The three basic types of seismic wave generated by an earthquake at its focus are Pwaves, Swaves, and Surface waves. endstream
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Objective Use data from seismograms to locate the epicenters of earthquakes. 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. Where the 3 circles intersect is the approximate location to the epicenter of the earthquake. HlRnQ?R\>BjK' 0000006538 00000 n
Therefore, the lag Pwaves have the greatest velocity and reach the, seismic station first. The vertical lines, spaced one They use three seismographs in a process called triangulation to determine earthquake epicenters. time for any point that is 3,000 miles Success is figuring out that the epicenter is just off the coast of Chile, where the three circles intersect. While earthquake locations are normally done with a computer that can quickly determine the paths of seismic waves through the Earth to many seismic stations, 15 Introduction to Geology Chapter Worksheet . 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. The farther away the epicenter is, the greater the difference . 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. gov For online instructions and current fees click here. When the tension becomes too great, the fault slips, causing an earthquake. Three seismographs are needed. Thanks for your feedback! 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. 0000053998 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. S-P interval: The time interval between the arrivals of P and S waves. ?t?s=Yt '_(
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A single recording station can only calculate distance, but not direction; to cover all possibilities, a complete circle is drawn around that station. EARTHQUAKES: Epicenter Determination and Seismic Waves First locate and mark the three seismic stations on the world map provided below. 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. xb``d``Id`a`Ab@_ :iWGi>|q` Pwaves have the greatest velocity and reach theseismic station first. Scientists and engineers around the globe gather data through observation and experimentation and use it to describe and understand how the world works. earthquake. The travel-time graph Explains how to find an earthquake epicenter using at least three seismograph stations. triangulation: A method to determine exactly where an earthquake originates. Place a ruler (or straight edge) on the chart between the points you marked for the distance to the epicenter and the amplitude. It's a logarithmic scale from 1 to 10 with each succeeding level representing 10 times as much energy as the last. Download. HTn0"H@w=s(vxk8OM1px-{$_!o5|CS7RPr#V(0CUa%ZkuT9t};D
Jj=.9,z!#@n5YCu>R88tfFRX=iRK Millions of people witnessed the motion of the earthquake on television. So the difference in the P- and S-wave arrival times determines the distance between the epicenter and a seismometer. Several thousand seismographs exist at locations around the planet, continuously measuring abnormalities in the Earth's movement. One seismogram indicates the distance to the epicenter. (Grades 9 - 12). 0000002094 00000 n
Answer the following questions in the spaces provided. Geologists use seismic waves to locate an earthquake's epicenter. 1. (Source: USGS, Wikipedia). 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. '
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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. 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. 500p;333aXb3
\a.1. lag time. !D,X2:azTG)kPT~Mj 4>d w@O'. Notify the classroom teacher of technology needs (overhead projector). The magnitude is the logarithm of the amplitude of the ground wave. 61 0 obj
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within type by subtype, then by grade, etc. Cross), Give Me Liberty! 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! Wikipedia, The Free Encyclopedia. (, 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. We additionally manage to pay for . You learned that seismologists determine the distance to the earthquake epicenter using the difference between S and P wave arrival times. 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. Resources. Using this resource students find the arrival times of P-waves and S-waves using a seismogram. 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. Construct an oral and written argument supported by empirical evidence and scientific reasoning to support or refute an explanation or a model for a phenomenon or a solution to a problem. to the lag time measured at this location? Also called seismometer. The Richter scale was created in the 1930s to assign a single number to quantify the energy released during earthquakes. To do this, have the students use, Find the epicenter of the earthquake on the map (. Engineers first determine where earthquakes are likely to occur, and how severe they are likely to be. After reading about earthquakes, open a new window to an Earthquake Simulator at, Follow the simulation instructions. When an earthquake strikes, P waves arrive at a seismograph rst and S waves next. Answer Key: Lab 5 Earthquakes - Find People EARTHQUAKES: Epicenter Determination and Seismic Waves . As you read and complete the activity, take notes so you can complete the. 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. 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. To abbreviate, use the symbol M (a capital M, plain text, no sub/superscripts) expressed to the nearest 0.1. epicenter, the longer the lag time measured (Grades
Short for "secondary wave" or "shear wave." minutes = 6 minutes. 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 three seismograms in this activity are unfi ltered station records from a single event that occurred on August 1, 1999. 0000009174 00000 n
Three seismographs are needed. Question 5 of 22 4.55/ 4.55 Points Questions 5 through 11 are based on Lab Exercise #2: Locating the Epicenter of an Earthquake. 0000106240 00000 n
The hypocenter is the point within the earth where an earthquake rupture starts. 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. Answer Key: Lab 5 Earthquakes - Find People, Locating Earthquake Epicenters | CK-12 Foundation, Earthquake Station - Regents Earth Science, Locating Earthquakes Teaching Resources - TPT, Locating An Epicenter Teaching Resources - TPT, How To Find The Epicenter Of An Earthquake - YouTube, Locating The Epicenter Of An Earthquake Worksheet, Locating An Earthquake Epicenter Worksheet Answers, glencoe responsible driving chapter 2 answers, pnp neuro psychiatric exam sample questions, quais tipos de drogas sao detectadas no exame toxicologico, centro de apoio diagnostico resultado de exames, locating earthquake epicenter worksheet answer key, exame pcr covid para viagem internacional, quantos dias pra sair o resultado do exame de covid, du ma political science entrance exam syllabus 2023, earth and life science grade 11 module 4 genetic engineering answer key, go math grade 5 chapter 11 lesson 11.9 answer key, civil service examination in the philippines. How is the magnitude of an earthquake determined? 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. 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. 0000001604 00000 n
Virtual Earthquake (tutorial/simulation) 1996. HS-PS4-1. For example, minutes and P waves 8 minutes to Earthquakes & Volcanoes Test Review Answers. The distance to the earthquake epicenter is then determined using the "Earthquake P-Wave and S-Wave Travel Time" graph.
It is called triangulation because a triangle has three sides, and it takes three seismographs to locate an earthquake. Alignment agreement:
earthquakes. How can you locate an earthquake's epicenter? [N'. Mark the first arrival of the swave on each seismogram. The period of P waves is shorter, than the period of surface waves. earthquake though). 2. Reading Strategy. Epicenter is the location on the surface of the Earth directly above where the earthquake starts. A minimum of three seismic stations is necessary to locate an epicenter. Richter scale Method of earthquake measurement based on the amplitude of seismic . How does distance from the epicenter affect the S-P time interval? Click for facts and worksheets in PDF! P and Swaves are body waves and travel, through the interior of the earth. 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. 0000001862 00000 n
The point where your ruler crosses the middle line on the chart marks the magnitude (strength) of the earthquake. Once three seismographs have been located, find the time interval between the arrival of the P-wave and the arrival of the S-wave. 11 minutes elapsed between the first P wave and the last measurable surface wave. 0000002009 00000 n
important in helping seismologists determine the epicenter of the earthquake. El trmino tambin puede hacer referencia al ttulo o nombre de alguien a quien se diri, Online Education Strategies (UNIV 1001 - AY2021-T), Advanced Care of the Adult/Older Adult (N566), Advanced Design Studio in Lighting (THET659), Introduction to Health Information Technology (HIM200), Biological Principles II and Lab (BIOL 107/L), PHIL ethics and social responsibility (PHIL 1404), Foundational Concepts & Applications (NR-500), Introduction To Project Management Software (CSBU539), Professional Application in Service Learning I (LDR-461), Advanced Anatomy & Physiology for Health Professions (NUR 4904), Principles Of Environmental Science (ENV 100), Operating Systems 2 (proctored course) (CS 3307), Comparative Programming Languages (CS 4402), Business Core Capstone: An Integrated Application (D083), BSC 2085-Study Guide - Dr. Alfonso Pino - Online course, Lecture notes, lecture all lectures - lecture notes from professor alan klein, Full Graded Quiz Unit 3 - Selection of my best coursework, EES 150 Lesson 2 Our Restless Planet Structure, Energy, & Change, General Chemistry I - Chapter 1 and 2 Notes, 1-2 Short Answer- Cultural Objects and Their Culture, Historia de la literatura (linea del tiempo), ACCT 2301 Chapter 1 SB - Homework assignment. Copyright USGS http://earthquake.usgs.gov/learn/kids/eqscience.php. Accessibility StatementFor more information contact us atinfo@libretexts.orgor check out our status page at https://status.libretexts.org. Apr 8, 2020 One seismogram indicates the distance to the epicenter. The process is called triangulation. 0000079769 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 the process of triangulation to locate an earthquake's epicenter. 107 0 obj
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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. H\0y THREE SEISMOGRAMS Seismogram A - New York, NY 1 minute 1. 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. How does distance from the epicenter affect the magnitude (height) of the seismograph reading? Type text, add images, blackout confidential details, add comments, highlights and more. hWmo9+[+UH EkNB|6YiaVJ=cRh7{T1R,5LI1$K=s)XR&87@&$LTPLutlcyNuzjf--\?qaXZM&HM.Eg"HnTqSWqN0&~2kf0
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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) . HTAn Then do the same for the S-wave. The calculated distance from each seismometer to the earthquake is shown as a circle. 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. 0000001408 00000 n
You will receive your score and answers at the end. 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. (Source: USGS). (Grades 6 - 8). Looking at the nomogram, students click on each location data point to see where the three lines intersect to read the estimated magnitude. U.S. Geological Survey, U.S. Department of the Interior. As discussed earlier in this lesson, this method of determining the epicenter of an . 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? This section explains what earthquakes and faults are and what causes earthquakes. 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
If a quake is far from the seismograph, the P-waves arrive long before the S-waves. 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. Have students click on the Earthquakes Living Lab hyperlink in the top left in the earthquakes section. at that station. 0000030240 00000 n
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. 17 Station St., Ste 3 Brookline, MA 02445. earthquake - shaking and vibration of Earth's surface. 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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activity 4 locating an earthquake epicenter answer key