What is an earthquake? Zip. We also acknowledge previous National Science Foundation support under grant numbers 1246120, 1525057, and 1413739. Upload a document. 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. Finding the Epicenter Determine the epicenter distance from three different seismographs. Once three seismographs have been located, find the time interval between the arrival of the P-wave and the arrival of the S-wave. 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. 12), Analyze and interpret data about natural hazards using direct and indirect evidence 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. Mark the first arrival of the swave on each seismogram. Do you agree with this alignment? 0000007783 00000 n The USGS now uses the MMS to estimate magnitudes for all modern large earthquakes. 12), Evaluate ways that technology can impact individuals, society, and the environment. Figure 2 is a seismic wave travel-time Notify the classroom teacher of technology needs (overhead projector). This is determined by the P-and S-wave arrival times. Locating an Earthquake's Epicenter - American Geosciences Institute Focus (aka Hypocenter) is the location in the Earth where the earthquake starts. 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. seismograph: An instrument that measures motions of the ground, including those of seismic waves generated by earthquakes. As you may know, people have look numerous times for . You will receive your score and answers at the end. technology, engineering or math (STEM) educational standards. Since the 1970s, the use of the Richter magnitude scale has largely been replaced in the scientific community by the moment magnitude scale (MMS). 0000003855 00000 n "`B(R6sj [CX7p+s =#;~ `'kA The American Geosciences Institute represents and serves the geoscience community by providing collaborative leadership and information to connect Earth, science, and people. 2. In Figure 13.9, there is an example seismogram from a station that includes a minor earthquake. 9 - Where the 3 circles intersect is the approximate location to the epicenter of the earthquake. Activity: Locating an Earthquake Epicenter Lecture 3 Damage from the earthquake was widespread, but the actual location of the earthquake (the epicenter) 0000008845 00000 n 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. 4. Short for "secondary wave" or "shear wave." 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"? These natural disasters may be mitigated, however, by insightful and creative engineering. Success is figuring out that the epicenter is just off the coast of Chile, where the three circles intersect. 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So the difference in the P- and S-wave arrival times determines the distance between the epicenter and a seismometer. The Richter scale was created in the 1930s to assign a single number to quantify the energy released during earthquakes. 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. Add to Library. 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 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. 1) Identify the general term for waves released from an earthquake. This is determined by the P-and S-wave arrival times. [N'. 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. A circle with a radius of the distance to the quake can be drawn. Use mathematical representations of phenomena or design solutions to describe and/or support claims and/or explanations. In order to determine the location of an earthquake epicenter, seismographs from at least three different places are needed for a particular event. 0000005081 00000 n The point where your ruler crosses the middle line on the chart marks the magnitude (strength) of the earthquake. Thanks for your feedback! Solved Lab Exercise #2: Locating the Epicenter of an - Chegg Students learn about the types of seismic waves produced by earthquakes and how they move through the Earth. Find 23 millimeters on the right side of the chart and mark that point. 17 Station St., Ste 3 Brookline, MA 02445. Facility Name Busine Child ren Information Child Name C. Child Social Security Number Type of Case being filed - Check only one category. 12), computer or other device with Internet access, journal or writing paper for each student. Type text, add images, blackout confidential details, add comments, highlights and more. 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. For example, ACTIVITY 4.2B Locating an Earthquake Figure 4.5 shows - Chegg minutes? The vertical lines, spaced one, minute apart, represent the passage of time, (from left to right). Scientists and engineers around the globe gather data through observation and experimentation and use it to describe and understand how the world works. use slide 6 and answer key slide 7 how can i locate the earthquake epicenter michigan web the epicenter of the earthquake is somewhere on the edge of that circle do the 0000053998 00000 n 0000003966 00000 n ya{I;W@DgMN2:UtbT=*+cY1.8Vm(u3Zt"J @9TAjJH@H_F3n7\Srdw~gAR#JQGj`ueS! The time 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? 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. Empirical evidence is required to differentiate between cause and correlation and make claims about specific causes and effects. Draw your signature, type it, upload its image, or use your mobile device as a signature pad. In this investigation, participants will understand that S and P waves are used to find the epicenter of an earthquake by using seismograph data to triangulate an epicenter. 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. Earthquakes can also cause tsunamis, which are very large waves that can damage coastlines and put coastal residents in danger. The earthquake occurred somewhere along that circle. Have students click on the Earthquakes Living Lab hyperlink in the top left in the earthquakes section. 0000005544 00000 n minutes and P waves 8 minutes to Lab Activity Locating Epicenters Teaching Resources | TPT question 1 of 3. $8.25. 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). Do you think we will someday be able to prevent earthquakes? S-P interval: The time interval between the arrivals of P and S waves. Expert Answer. It shows the time required for P Alignment agreement: gov For online instructions and current fees click here. 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. DocHub v5.1.1 Released! 0000030968 00000 n (from left to right). Video Guide / Worksheets and Quizzes for Quizzes and Answer Sheet __ 2. To make a magnitude determination, two measurements are needed: the S-P interval (already determined earlier in the tutorial) and the maximum amplitude of the seismic waves. (Figure 3):. Section A - Operator Information 1. Collect any giveaways for the students, such as earthquake posters or plate tectonic fliers. locate and label the epicenter of the earthquake on this map. If you draw a circle on a map around three different seismographs where the radius of each is the distance from that station to the earthquake, the intersection of those three circles is the epicenter. If you can't find an answer to your question, please contact us. How Can I Locate the Earthquake Epicenter? | Michigan Technological