Figure 2 is a seismic wave travel-time (Grades 6 - 8). Epicenter. The period of P waves is shorter, than the period of surface waves. 3000 miles. 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. If a quake is far from the seismograph, the P-waves arrive long before the S-waves. https://people.wou.edu/~taylors/gs104/lab5key.pdf Locating Earthquake Epicenters | CK-12 Foundation Apr 8, 2020 . The simulation renders three circles on a map and directs students to find the epicenter. Was there an initial quake followed by smaller quakes? In Figure 13.9, there is an example seismogram from a station that includes a minor earthquake. farther from the epicenter of an earthquake? 0000001408 00000 n 1. When an earthquake strikes, P waves arrive at a seismograph rst and S waves next. What is an earthquake? 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. The point where your ruler crosses the middle line on the chart marks the magnitude (strength) of the earthquake. [*aiLG?+J\QI86~}ooRrr!pm}dk@dBbZPMZlC4C\9^ SM.R\!H+$|+DUzt^w{" %&{KXjT'9yzT^UFe:+f(`PU_9%EW@\)?i qp!\G Z endstream endobj 75 0 obj <>stream Do you think we will someday be able to prevent earthquakes? The calculated distance from each seismometer to the earthquake is shown as a circle. Civilization and its Discontents (Sigmund Freud), Educational Research: Competencies for Analysis and Applications (Gay L. R.; Mills Geoffrey E.; Airasian Peter W.), Brunner and Suddarth's Textbook of Medical-Surgical Nursing (Janice L. Hinkle; Kerry H. Cheever), Psychology (David G. Myers; C. Nathan DeWall), The Methodology of the Social Sciences (Max Weber), Business Law: Text and Cases (Kenneth W. Clarkson; Roger LeRoy Miller; Frank B. hWmo9+[+UH EkNB|6YiaVJ=cRh7{T1R,5LI1$K=s)XR&87@&$LTPLutlcyNuzjf--\?qaXZM&HM.Eg"HnTqSWqN0&~2kf0 Md|d&:zhe)7I? (Grades The longer the time is between the P-and S-wave . 0000001862 00000 n Lab Exercise #2: Locating the Epicenter of an Earthquake In this lab exercise, you will locate the epicenter of an earthquake. What did it feel like? different types of seismic waves. Virtual Earthquake (tutorial/simulation) 1996. Describe what the "magnitude" of an earthquake is. Expert Answer. Short for "primary wave" or "pressure wave." The process is called triangulation. 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). 0000000956 00000 n The three seismograms in this activity are unfi ltered station records from a single event that occurred on August 1, 1999. 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. 0000053998 00000 n 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. Dochub is the best editor for changing your documents online. 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. 0000079769 00000 n Upload a document. If your seismograph station is How might they use this information? This investigation is considered generally safe to do with students. 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. 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. (Grades 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. "`B(R6sj [CX7p+s =#;~ `'kA This is determined by the P-and S-wave arrival times. Three seismographs are needed. 1. 9 - Develop a solution to a technological problem that has the least negative environmental and social impact. pen recorded the arrival of P, S, and surface Mr Gneiss. Send activity 4 locating an earthquake epicenter worksheet answers via email, link, or fax. Objective Use data from seismograms to locate the epicenters of earthquakes. Download. The distance to the earthquake epicenter is then determined using the "Earthquake P-Wave and S-Wave Travel Time" graph. 0000002094 00000 n 0000010002 00000 n %PDF-1.3 % Then from the same recordings they determine the earthquake's magnitude, an estimate of the amount of energy released during the earthquake. between arrival of P and S waves is called Though they may weaken with distance, seismographs are sensitive enough to still detect these waves. n{6c&6NK*U;=9i%nF The travel-time graph As the drum rotated, the Do you agree with this alignment? Students first triangulate the location of an earthquake's epicenter, then calculate its magnitude. ?t?s=Yt '_( endstream endobj 76 0 obj <>stream 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. 0000078100 00000 n time for any point that is 3,000 miles Finding the Epicenter Determine the epicenter distance from three different seismographs. hbb2b`b``a I @ endstream endobj 62 0 obj <>/Metadata 55 0 R/Pages 51 0 R/StructTreeRoot 57 0 R/Type/Catalog/ViewerPreferences<>>> endobj 63 0 obj <>/Font<>>>/Fields[]>> endobj 64 0 obj <>/Font<>/ProcSet[/PDF/Text]>>/Rotate 0/TrimBox[0.0 0.0 612.0 792.0]/Type/Page>> endobj 65 0 obj <> endobj 66 0 obj <> endobj 67 0 obj <> endobj 68 0 obj <>stream 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). Finding the epicenter of an Earthquake by Ah - Ha Lessons 5.0 (1) $3.00 PDF Activity This lesson teaches the student the process scientists use to locate the epicenter of an EQ. Draw your signature, type it, upload its image, or use your mobile device as a signature pad. Today, most seismologists no longer follow Richter's original methodology because it does not give reliable results when applied to stronger earthquakes and it was not designed to use data from earthquakes recorded at epicentral distances greater than ~600 km. (Source: USGS). m>r/Q[6 How many minutes elapsed between the arrival of the first P wave and the last measurable This worksheet focuses on using the p and s graph to find different variables. What data is used to determine magnitude? Earth and Space, Physical Science, A process called triangulation uses seismic data from three locations to identify the epicenter of an earthquake.copyrightCopyright USGS http://earthquake.usgs.gov/learn/kids/eqscience.php. 0000078169 00000 n Seismic stations detect earthquakes by the tracings made on seismographs. Take a few minutes to read the information on the left side of this page for the 2010 earthquake off the coast of central Chile. Place a ruler (or straight edge) on the chart between the points you marked for the distance to the epicenter and the amplitude. Details. Many updates and improvements! BDF endstream endobj 74 0 obj <>stream (Grades 9 - 12). Video Guide / Worksheets and Quizzes for Quizzes and Answer Sheet __ 2. For example, Seismograms Learn more How Can I Locate the Earthquake Epicenter? Next, have student groups answer the eight questions in the. HTn {0,`K6}(J6]&Q^"!q57y_VQ9fp3/?Mc=KGsrrt:c\$Lh`4}>C>`qcSj0[YpZ_Su(322/N Z./$E )H %C[5ph[BUyGh7|!XPQiDjJ(|BNvylk+g;9G(#Aby>Jcf`XmnwtDD+;Z^I&Sb-4!7oi` L7 endstream endobj 78 0 obj <> endobj 79 0 obj <>stream Moment magnitude scale. endstream endobj 84 0 obj <> endobj 85 0 obj <> endobj 86 0 obj <>stream If less precision is desired, precede M with a tilde, such as "M ~7" or "magnitude ~6.8.". 0000001396 00000 n 17 Station St., Ste 3 Brookline, MA 02445. Some places are more prone to earthquakes than others. When the tension becomes too great, the fault slips, causing an earthquake. Accessed December 11, 2013. http://en.wikipedia.org/wiki/Moment_magnitude_scale, Novak, Gary. How do we determine the epicenter of an earthquake? You will analyze the records and locate the earthquake using a method known earthquakes. In Figure 13.9, there is an example seismogram from a station that includes a minor earthquake. Another method of locating an earthquake is to use the P-wave arrival-time minus origin-time (P - O) interval instead of distance. Students learn about the types of seismic waves produced by earthquakes and how they move through the Earth. 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. An earthquake is the violent movement of tectonic plates in the Earth's crust. In the ASN, standards are hierarchically structured: first by source; e.g., by state; within source by type; e.g., science or mathematics; Pwaves have the greatest velocity and reach theseismic station first. Do you agree with this alignment? Geology Labs On-Line, Department of Geological Sciences, California State University, Los Angeles, CA. (i. 1. 0000033429 00000 n 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. They make a model of a seismographa measuring device that records an earthquake on a seismogram. 0000003855 00000 n The farther away the epicenter is, the greater the difference . Edit your locating an earthquake epicenter worksheet answers online. 61 33 The American Geosciences Institute represents and serves the geoscience community by providing collaborative leadership and information to connect Earth, science, and people. minutes = 6 minutes. For example, the western United States has earthquakes more frequently and on a larger scale than the eastern part of the country. The period of a wave is the time between two adjacent wave peaks. determine the epicenter using the S P (S minus P) method. (Source: USGS, Wikipedia). 0000008845 00000 n 0000030240 00000 n Considered best for measuring small earthquakes (3.5 M or less). 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. at that station. 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. Finding the epicenter worksheet answer key. 5 4. 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An earthquake is what happens when two blocks of the earth suddenly slip past one directly above it on the surface of the earth is called the epicenter. *The NGSS logo is a registered trademark of WestEd. [k0 |`2dGXGGGd00A(60P-e = F5n -f$ C approximate period of the surface waves in seconds? 107 0 obj <>stream Learn from this informative and clear video.Brought you by award-winning Once each student has constructed his or her circle on the map, mark with an X, the epicenter of the earthquake. Describe the logarithmic nature of the earthquake magnitude scale. Locating an Epicenter through Triangulation of Seismic Data- Remote/Hybrid/Live. It is slower than the same earthquake's P wave and cannot travel through liquids. Add to Library. Material is sheared side to side, perpendicular to the direction of wave propagation. 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. Copyright USGS http://earthquake.usgs.gov/learn/kids/eqscience.php. As you read and complete the activity, take notes so you can complete the. Every earthquake is recorded on numerous seismographs located in different directions. 0000002250 00000 n =Cv :~4yrXP 62{_,*Uq/O-oUNBr-$y~:G},#3e^CS6U*_zVGY7ZNUWk2f?? {%!,"{u5E&OOqA_"/uxn-kx+Vz*EQb)Q Point on Earth's surface directly above an earthquake's focus. First locate and mark the three seismic stations on the world map provided below. Do you agree with this alignment? However, please review it for the specific setting, materials, students, and conventional safety precautions. Locating an Epicenter Activity - Arkansas Geological Survey 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. d>(ZvO= Free K-12 standards-aligned STEM curriculum for educators everywhere. What is an earthquake? Explain the difference between S and P waves, and how their time interval is used to determine the epicenter location. Use this information to complete the following. ' endstream endobj 69 0 obj <> endobj 70 0 obj [85 0 R] endobj 71 0 obj <> endobj 72 0 obj <> endobj 73 0 obj <>stream 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. 0000006984 00000 n Students learn about factors that engineers take into consideration when designing buildings for earthquake-prone regions. So the difference in the P- and S-wave arrival times determines the distance between the epicenter and a seismometer. 9 - 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.