Tracings made at three separate seismic stations are needed to locate an earthquake epicenter. Also called seismometer. : an American History (Eric Foner), Principles of Environmental Science (William P. Cunningham; Mary Ann Cunningham), Forecasting, Time Series, and Regression (Richard T. O'Connell; Anne B. Koehler), Chemistry: The Central Science (Theodore E. Brown; H. Eugene H LeMay; Bruce E. Bursten; Catherine Murphy; Patrick Woodward), Biological Science (Freeman Scott; Quillin Kim; Allison Lizabeth), Campbell Biology (Jane B. Reece; Lisa A. Urry; Michael L. Cain; Steven A. Wasserman; Peter V. Minorsky), How many minutes elapsed between the arrival of the first P wave and. DocHub v5.1.1 Released! Finding the epicenter worksheet answer key. Share with Classes. HTn0"H@w=s(vxk8OM1px-{$_!o5|CS7RPr#V(0CUa%ZkuT9t};D
Jj=.9,z!#@n5YCu>R88tfFRX=iRK to the lag time measured at this location? Use of the TeachEngineering digital library and this website constitutes acceptance of our Terms of Use and Privacy Policy. As the drum rotated, the Empirical evidence is required to differentiate between cause and correlation and make claims about specific causes and effects. Click for facts and worksheets in PDF! earthquakes. 5 4. The western U.S. has more faults than the eastern U.S., and therefore the western U.S. has more earthquakes. 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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. Mark the first arrival of the swave on each seismogram. Scientists use triangulation to find the epicenter of an earthquake. All 100,000+ K-12 STEM standards covered in TeachEngineering are collected, maintained and packaged by the Achievement Standards Network (ASN),
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. It is called triangulation because a triangle has three sides, and it takes three seismographs to locate an earthquake. 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? 0000001736 00000 n
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. How far do S waves travel in 5 to the lag time measured at this location? How does distance from the epicenter affect the magnitude (height) of the seismograph reading? 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. 0000055643 00000 n
There are two sets of data and maps to do this activity/ lab for than once. Zip. For example, Using this resource students find the arrival times of P-waves and S-waves using a seismogram. Please answer the following questions using the earthquake video shake, shake, shake. miles from the epicenter of an minutes and P waves 8 minutes to Accessibility StatementFor more information contact us atinfo@libretexts.orgor check out our status page at https://status.libretexts.org. Point on Earth's surface directly above an earthquake's focus. This section explains what earthquakes and faults are and what causes earthquakes. 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. In order to determine the location of an earthquake epicenter, seismographs from at least three different places are needed for a particular event. 0000031066 00000 n
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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. approximate period of the surface waves in seconds? Using 3 seismograms the students will be able to triangulate the epicenter of an earthquake. *The NGSS logo is a registered trademark of WestEd. See Answer. Notify the classroom teacher of technology needs (overhead projector). X!.43p2t!}SLx-3z.KN4X+H\+vk? To locate the epicenter of the earthquake, seismologists use the . The epicenter is the point directly above it at the surface of the Earth. The real-world earthquake data is viewable via a graphical interface using a scaling map. Next, have student groups answer the eight questions in the. 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. minutes? 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. 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. (5 minutes) Discuss how gathering information on epicenters can be applied. 0000030504 00000 n
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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. earthquake - shaking and vibration of Earth's surface. 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). Copyright USGS http://earthquake.usgs.gov/learn/kids/eqscience.php. %%EOF
EARTHQUAKES: Epicenter Determination and Seismic Waves First locate and mark the three seismic stations on the world map provided below. The process is called triangulation. The Richter scale was created in the 1930s to assign a single number to quantify the energy released during earthquakes. n{6c&6NK*U;=9i%nF Triangulation and Magnitude: Student pairs complete the worksheet, which includes following a tutorial/simulation accessed through the Earthquakes Living Lab. One seismogram indicates the distance to the epicenter. 0000106240 00000 n
Short for "secondary wave" or "shear wave." HS]o01j6R0iMm4U=wL8]BE< 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. Geologists use seismic waves to locate an earthquake's epicenter. 0000001604 00000 n
12), Analyze and interpret data about natural hazards using direct and indirect evidence
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.
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