Another method of locating an earthquake is to use the P-wave arrival-time minus origin-time (P - O) interval instead of distance. Use mathematical representations to support a claim regarding relationships among the frequency, wavelength, and speed of waves traveling in various media. The period of a wave is the time between two adjacent wave peaks. Last updated November 26, 2013. 5. focus - the point within Earth where an earthquake originates. 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). For example, The vertical lines, spaced one 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. The distance to the earthquake epicenter is then determined using the "Earthquake P-Wave and S-Wave Travel Time" graph. Students first triangulate the location of an earthquake's epicenter, then calculate its magnitude. 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. important in helping seismologists determine the epicenter of the earthquake. approximate period of the surface waves in seconds? The earthquake occurred somewhere along that circle. activity 4 locating an earthquake epicenter The Science of Earthquakes | U.S. Geological Survey An earthquake is what happens when two blocks of the earth suddenly slip past one . All rights reserved. Pwaves have the greatest velocity and reach the, seismic station first. 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. 17 Station St., Ste 3 Brookline, MA 02445. During an earthquake, seismic waves are sent all over the globe. %PDF-1.5
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Make changes to the sample. The point beneath Earth's surface where rock breaks under stress and causes an earthquake. Where the 3 circles intersect is the approximate location to the epicenter of the earthquake. 61 33
Activity4:LocatinganEarthquakeEpicenter Objectives:Ifyoucompletealltheproblems,youshouldbeableto: Identif Epicenter. HS]o01j6R0iMm4U=wL8]BE< 12), Evaluate ways that technology can impact individuals, society, and the environment. 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. H\0y (Grades
P and Swaves are body waves and travel, through the interior of the earth. hWmo9+[+UH EkNB|6YiaVJ=cRh7{T1R,5LI1$K=s)XR&87@&$LTPLutlcyNuzjf--\?qaXZM&HM.Eg"HnTqSWqN0&~2kf0
Md|d&:zhe)7I? The spot where those three circles intersect is the epicenter (Figure 13.12). Collect any giveaways for the students, such as earthquake posters or plate tectonic fliers. miles from the epicenter of an Notify the classroom teacher of technology needs (overhead projector). 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Use data from seismograms to locate the epicenters of earthquakes. Have students turn in their answers for the Explain portion of the worksheet. This is determined by the P-and S-wave arrival times. earthquakes. P and S arrivals, you can now locate an earthquake your answers below. Swaves arrive at the seismic station after the Pwaves. Send activity 4 locating an earthquake epicenter worksheet answers via email, link, or fax. farther from the epicenter of an earthquake? The Earthquakes Living Lab gives students the chance to track earthquakes across the planet and examine where, why and how they are occurring. Figure 13.10). minutes and P waves 8 minutes to 0000003966 00000 n
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Finding the epicenter worksheet answer key. Earthquakes occur along faults, which are cracks in the Earths crust that build tension. 0000002544 00000 n
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American Geosciences Institute. Also called seismometer. PDF Example Answers - TeachEngineering minutes = 6 minutes. 107 0 obj
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Specifically, seismographs make recordings (seismograms) of the seismic waves generated from earthquakes, providing engineers and other researchers with data that they use to make predictions about future earthquakes. 0000004060 00000 n
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Students also investigate which structural designs are most likely to survive an earthquake. 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. 0000008088 00000 n
Thus technology use varies from region to region and over time. 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. 0000001604 00000 n
Copyright 2023. Once three seismographs have been located, find the time interval between the arrival of the P-wave and the arrival of the S-wave. Now on the main page of the Earthquakes Living Lab website (see Figure 2), note the featuring of four active seismic areas and the mapping of real-time and current data from earthquakes happening around the world. 12), Analyze and interpret data about natural hazards using direct and indirect evidence
4. Ask students what fault they think caused this earthquake. Describe the logarithmic nature of the earthquake magnitude scale. HTn {0,`K6}(J6]&Q^"!q57y_VQ9fp3/?Mc=KGsrrt:c\$Lh`4}>C>`qcSj0[YpZ_Su(322/N
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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. Edit your locating an earthquake epicenter worksheet answers online. 0000030968 00000 n
Last modified July 18, 2012. Do you agree with this alignment? USGS Earthquake Hazards Program HlRnQ?R\>BjK' Section 8.1 What Is an Earthquake? Activity 4 Locating An Earthquake Epicenter Answers: Fill Out & Sign . These distances are determined using a travel-time curve, which is a graph of Pand S-wave arrival times (see Figure 13.11). 0000078100 00000 n
Epicenter is the location on the surface of the Earth directly above where the earthquake starts. Quick Tips. seismogram. Share with Classes. 0000002658 00000 n
HTn0MmcHCB Figure 2. 0000055643 00000 n
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. For lower grades, just introduce the concepts of triangulation and the magnitude scale; a thorough understanding of P and S waves is not vital. 0000005544 00000 n
They make a model of a seismographa measuring device that records an earthquake on a seismogram.
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