Step 1: ans- d) 65 seconds Ste . When seismic data is collected from at least three different locations, it can be used to determine the epicenter by where it intersects. How can you locate an earthquake's epicenter? How do we determine the epicenter of an earthquake? Make changes to the sample.
Locating An Earthquake Epicenter Lab Answer Key 01. A.45 seconds B.50 seconds C.55 seconds D.65 seconds Answer Key: D Focus (aka Hypocenter) is the location in the Earth where the earthquake starts. 0 500 1000 1500 2000 2500 3000
First locate and mark the three seismic stations on the world map provided below.
Lab Activity Locating Epicenters Teaching Resources | TPT THREE SEISMOGRAMS Seismogram A - New York, NY 1 minute 1. Locating an Epicenter Activity - Arkansas Geological Survey Analyze and interpret data on natural hazards to forecast future catastrophic events and inform the development of technologies to mitigate their effects. We also acknowledge previous National Science Foundation support under grant numbers 1246120, 1525057, and 1413739. 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. Use mathematical representations of phenomena or design solutions to describe and/or support claims and/or explanations. (, Have any of you ever experienced an earthquake or know anyone who has? Moment magnitude scale. If the lag time were measured at a location closer to the epicenter, how would it compare by. PS: We do not share personal information or emails with anyone. Success is figuring out that the estimated magnitude is 5.9. 0000009174 00000 n
If you complete all the problems, you should be able to: Identify P, S, and surface waves on a simple seismogram. P wave: The first seismic wave of an earthquake. It is called triangulation because a triangle has three sides, and it takes three seismographs to locate an earthquake. 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). The USGS and its partners monitor and report earthquakes, assess earthquake impacts and hazards, and . Using 3 seismograms the students will be able to triangulate the epicenter of an earthquake. Mr Gneiss.
PDF ActivityEarthquake Location* - Cascadia Earthscope Earthquake and All the arcs should intersect at a common point - the epicenter. (5 minutes) Discuss how gathering information on epicenters can be applied. Was there an initial quake followed by smaller quakes? endstream
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hbbd``b`$C`q9 X_$_g`bdxc`X If a quake is near the seismograph, the S-waves arrive shortly after the P-waves. Note the differences in Looking at the nomogram, students click on each location data point to see where the three lines intersect to read the estimated magnitude. Material is sheared side to side, perpendicular to the direction of wave propagation. to the lag time measured at this location? 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. 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. We have answers to the most popular questions from our customers. Do you agree with this alignment? 0000001143 00000 n
inch = 500 km. Divide the class into student pairs, and have them assemble at their computers with journals/paper and writing instruments.
View Notes - Locating_an_epicenter_activity from SCIENCE Earth Scie at Toms River High North. atrial depolarization. This opens a new window to Michigan Techs UPSeis informational site about earthquakes and seismology. You can also download it, export it or print it out. How does the period of the P waves compare to the period of the surface waves? *The NGSS logo is a registered trademark of WestEd. Resources. 0000006538 00000 n
determine the epicenter using the S P (S minus P) method. What is the time lag for the Seattle, Washington, seismic station? Y$Kr;V6[;Dq vg~cx:A[^jCssupwD
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The western U.S. has more faults than the eastern U.S., and therefore the western U.S. has more earthquakes. Accessed December 11, 2013. http://earthquake.usgs.gov/aboutus/docs/020204mag_policy.php. 0000078169 00000 n
Once three seismographs have been located, find the time interval between the arrival of the P-wave and the arrival of the S-wave. (Grades
Hands-on Activity Earthquakes Living Lab: Finding Epicenters Travel-time graphDistance in Miles, Copyright 2023 StudeerSnel B.V., Keizersgracht 424, 1016 GC Amsterdam, KVK: 56829787, BTW: NL852321363B01, seismogram. Legal. 0000001604 00000 n
waves from a distant earthquake. Millions of people witnessed the motion of the earthquake on television. 0000006984 00000 n
Must engineers be content with mitigating disasters, instead of preventing them? 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.
PDF EARTHQUAKES: Epicenter Determination, Seismic Waves, and Hazards - WOU The farther a station is from the Thanks for your feedback! Do you agree with this alignment? time for any point that is 3,000 miles 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. Add to FlexBook Textbook. 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. 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. pen recorded the arrival of P, S, and surface 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. 0000001675 00000 n
Subjects: $8.25.
Seismographs - Keeping Track of Earthquakes | U.S. Geological Survey Virtual Earthquake (tutorial/simulation) 1996. endstream
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6.17: Locating Earthquake Epicenters - K12 LibreTexts Accessed December 11, 2013. http://en.wikipedia.org/wiki/Moment_magnitude_scale, Novak, Gary. The arrival of seismic waves will be recognized by an increase in amplitude look for a pattern change as lines get taller and more closely spaced (ex. graph. You learned that seismologists determine the distance to the earthquake epicenter using the difference between S and P wave arrival times. Develop a solution to a technological problem that has the least negative environmental and social impact. Also called seismometer. !D,X2:azTG)kPT~Mj 4>d w@O'. It shows the time required for P E}g7$i(=K)"aj%v]vPcYloi@X3noGX{[XucOgkdF.>Ym^fwrQf;8_Nok3w\;?n_Hhc?>k\o[%DgwJ'3d.lTqDy_aJw! If a quake is far from the seismograph, the P-waves arrive long before the S-waves. While no one can predict earthquakes, knowing the intensities, frequencies and locations of past earthquakes and fault planes helps us to better anticipate the locations and forces to expect, so we can do our best to prepare our communities and infrastructure to withstand them safely. Type text, add images, blackout confidential details, add comments, highlights and more. Scientists use triangulation to find the epicenter of an earthquake. 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. What types of engineers might use this data the most? How does the Mad Scientist. Ask students what fault they think caused this earthquake. This is determined by the P-and S-wave arrival times. Locating An Earthquake Epicenter Lab Answers Thank you for reading Locating An Earthquake Epicenter Lab Answers . 0000001396 00000 n
How many minutes elapsed between the arrival of the first P wave and the last measurable Quick Tips. This worksheet focuses on using the p and s graph to find different variables. Subject Areas:
You will receive your score and answers at the end. epicenter: A point on the Earth's surface that is directly above the place where the underground forces of an earthquake originate. seismogram. hb```b````e``n`d@ A
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ACTIVITY 4.2B Locating an Earthquake Figure 4.5 shows - Chegg 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. However, please review it for the specific setting, materials, students, and conventional safety precautions. 5. focus - the point within Earth where an earthquake originates. 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.
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@9TAjJH@H_F3n7\Srdw~gAR#JQGj`ueS! The magnitude determination is based on seismic data. 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 USGS Earthquake Hazards Program is part of the National Earthquake Hazards Reduction Program (NEHRP), established by Congress in 1977, and the USGS Advanced National Seismic System (ANSS) was established by Congress as a NEHRP facility.