Great-circle arcs are drawn on the globe using the distance of the earthquake to the station as a radius. A single recording station can only calculate distance, but not direction; to cover all possibilities, a complete circle is drawn around that station. Analyze and interpret data on natural hazards to forecast future catastrophic events and inform the development of technologies to mitigate their effects. Must engineers be content with mitigating disasters, instead of preventing them? 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? 0000030504 00000 n
Encourage them to explore all of the Earthquakes Living Lab as they complete the worksheet. (Figure 3):. Alignment agreement:
Assess their understanding based on the thoroughness of their answers. American Geosciences Institute. Subjects: Earth Sciences, General Science Grades: 5th - 8th Types: Activities, Laboratory You learned that seismologists determine the distance to the earthquake epicenter using the difference between S and P wave arrival times. Practice with Triangulation: Locating an earthquake epicenter. What did it feel like? Focal Depth. One seismogram indicates the distance to the epicenter. Next, have student groups answer the eight questions in the. Earthquakes and Seismic Waves Key Concepts . 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 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. Finding the Epicenter. (Figure 3):. 0000002383 00000 n
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. Step 1: ans- d) 65 seconds Ste . 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! 0000002544 00000 n
Fill Locating The Epicenter Of An Earthquake Worksheet Answers, Edit online. Considered best for measuring small earthquakes (3.5 M or less). Locating Earthquake Epicenter Lab Answer Key buysms de. located 1,000 miles from the 0000002250 00000 n
PDF. In order to determine the location of an earthquake epicenter, seismographsfrom at least three different places are needed for a particular event. 83 0 obj
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What are those limits? ACTIVITY 4.2B Locating an Earthquake Figure 4.5 shows seismograms for the same earthquake recorded at three locations - New York, Nome, Alaska, and Mexico City. This section explains what earthquakes and faults are and what causes earthquakes. 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. '
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3. epicenter - the point on Earth's surface directly above the focus, or origin, of an earthquake. The seismometers are shown as green dots. 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. The USGS and its partners monitor and report earthquakes, assess earthquake impacts and hazards, and . "`B(R6sj
[CX7p+s =#;~ `'kA earthquake. 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. cCV&0Lw1~c\4QA!{q:
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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. The spot where those three circles intersect is the epicenter (Figure 13.12). Quick Tips. 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-1.4
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$8.25. However, please review it for the specific setting, materials, students, and conventional safety precautions. In the ASN, standards are hierarchically structured: first by source; e.g., by state; within source by type; e.g., science or mathematics;
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@9TAjJH@H_F3n7\Srdw~gAR#JQGj`ueS! Facility Name Busine Child ren Information Child Name C. Child Social Security Number Type of Case being filed - Check only one category. Free K-12 standards-aligned STEM curriculum for educators everywhere. Even though the scale formulae are different, MMS retains the familiar continuum of magnitude values defined by the older scale. 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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. 1. Objective Use data from seismograms to locate the epicenters of earthquakes. 0000006538 00000 n
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epicenter, the longer the lag time measured activity illustrates how the epicenter of an earthquake is found. It's a logarithmic scale from 1 to 10 with each succeeding level representing 10 times as much energy as the last. The Richter scale was created in the 1930s to assign a single number to quantify the energy released during earthquakes. I contacted the persons listed below to find out the location of the following people entitled to notice Name of Person Measure the difference in arrival times between the first shear (s) wave and the first compressional (p) wave, which can be interpreted from the seismogram. 0000002507 00000 n
Locating an Epicenter through Triangulation of Seismic Data- Remote/Hybrid/Live. 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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to the lag time measured at this location? Students learn about the types of seismic waves produced by earthquakes and how they move through the Earth. A.45 seconds B.50 seconds C.55 seconds D.65 seconds Answer Key: D 12), Evaluate ways that technology can impact individuals, society, and the environment. This is determined by the P-and S-wave arrival times. Learn more How Can I Locate the Earthquake Epicenter? Share with Classes. Seismograms 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. aqmd. HTn0"H@w=s(vxk8OM1px-{$_!o5|CS7RPr#V(0CUa%ZkuT9t};D
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If a quake is near the seismograph, the S-waves arrive shortly after the P-waves. 0000030240 00000 n
minute apart, represent the passage of time Figure 2. The hypocenter is the point within the earth where an earthquake rupture starts. Triangulation and Magnitude: Student pairs complete the worksheet, which includes following a tutorial/simulation accessed through the Earthquakes Living Lab. miles from the epicenter of an %%EOF
Short for "primary wave" or "pressure wave." The period of a wave is the time between two adjacent wave peaks. technology, engineering or math (STEM) educational standards. 0000001604 00000 n
P and S arrivals, you can now locate an earthquake your answers below. 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.
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The process is called triangulation. The magnitude is the logarithm of the amplitude of the ground wave. 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). Have students turn in their answers for the Explain portion of the worksheet. Please answer the following questions using the earthquake video shake, shake, shake. Also called seismometer. 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. 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. 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. Please answer the following questions using the earthquake video - shake, shake, shake. The epicenter of an earthquake can be found using the difference between the arrival of the Primary and Secondary waves. (Grades 9 - 12). Figure 8. 0000003855 00000 n
The point where your ruler crosses the middle line on the chart marks the magnitude (strength) of the earthquake. 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. Since the 1970s, the use of the Richter magnitude scale has largely been replaced in the scientific community by the moment magnitude scale (MMS). between arrival of P and S waves is called (from left to right). Then from the same recordings they determine the earthquake's magnitude, an estimate of the amount of energy released during the earthquake. Figure 2 is a seismic wave travel-time X!.43p2t!}SLx-3z.KN4X+H\+vk? Explains how to find an earthquake epicenter using at least three seismograph stations. ?t?s=Yt '_(
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consider a seismograph stationed 3, hb```b````e``n`d@ A
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vILZ*|%6mD! The farther a station is from the Civil engineers, who design houses, apartment buildings, schools, skyscrapers, bridges, highways, tunnels, water treatment facilities, factories and other structures, may use this data to help them create safer structures that are less likely to sustain damage during earthquakes. 0000007097 00000 n
Of the four Earthquakes Living Lab seismic areas, choose the "Chile" box, as shown in Figure 3. Copyright USGS http://earthquake.usgs.gov/learn/kids/eqscience.php. 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. graph. Use this information to complete the following. These natural disasters may be mitigated, however, by insightful and creative engineering. 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?" 4. d>(ZvO= Earthquakes Living Lab: Finding Epicenters & Measuring Magnitudes. lag time. 9 -
approximate period of the surface waves in seconds? There are two sets of data and maps to do this activity/ lab for than once. 9 -
Earthquakes occur along faults, which are cracks in the Earths crust that build tension. Thanks for your feedback! Use Figure 5 and the travel-time graph in Figure 4 to determine . 0000005544 00000 n
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surface wave? This worksheet focuses on using the p and s graph to find different variables. 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. Every earthquake is recorded on numerous seismographs located in different directions. 0000098546 00000 n
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5 4. In this 1-to-10 logarithmic scale, each succeeding level representing 10 times as much energy as the last. 0000001978 00000 n
Focus (aka Hypocenter) is the location in the Earth where the earthquake starts. How are S and P waves used to determine how far away epicenters are? Using the real-world data in the living lab enables students and teachers to practice analyzing data to solve problems and answer questions, in much the same way that scientists and engineers do every day. 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. 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. 0000002658 00000 n
The longer the time between the arrival of the P-wave and S-wave, the farther away is the epicenter. (Grades
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