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. within type by subtype, then by grade, etc. Tracings made at three separate seismic stations are needed to locate an earthquake epicenter. hb```f``Rl@ (l"`+uk?0.a~@6Vm;| G3f`75@v@Wz|A4#w9{(` ) DocHub v5.1.1 Released! 61 0 obj <> endobj xref The calculated distance from each seismometer to the earthquake is shown as a circle. 0000053998 00000 n endstream endobj 84 0 obj <> endobj 85 0 obj <> endobj 86 0 obj <>stream 0000001777 00000 n Question 5 of 22 4.55/ 4.55 Points Questions 5 through 11 are based on Lab Exercise #2: Locating the Epicenter of an Earthquake. However, please review it for the specific setting, materials, students, and conventional safety precautions. How is the magnitude of an earthquake determined? P and S arrivals, you can now locate an earthquake your answers below. If the lag time were measured at a location closer to the epicenter, how would it compare Details. 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. Use this information to complete the following. Learn more How Can I Locate the Earthquake Epicenter? If you complete all the problems, you should be able to: Identify P, S, and surface waves on a simple seismogram. Answer Key: Lab 5 Earthquakes - Find People EARTHQUAKES: Epicenter Determination and Seismic Waves . long will it take, to the nearest 0. minutes, for the first P waves to travel from the epicenter to your station? 12), computer or other device with Internet access, journal or writing paper for each student. Triangulation to Locate an Earthquake By Earthquake Hazards Original Thumbnail Medium Detailed Description Triangulation can be used to locate an earthquake. pen recorded the arrival of P, S, and surface Locating an Epicenter Activity - Arkansas Geological Survey HTn {0,`K6}(J6]&Q^"!q57y_VQ9fp3/?Mc=KGsrrt:c\$Lh`4}>C>`qcSj0[YpZ_Su(322/N Z./$E )H %C[5ph[BUyGh7|!XPQiDjJ(|BNvylk+g;9G(#Aby>Jcf`XmnwtDD+;Z^I&Sb-4!7oi` L7 endstream endobj 78 0 obj <> endobj 79 0 obj <>stream PS: We do not share personal information or emails with anyone. Focal Depth. 2. 0000001143 00000 n Describe the logarithmic nature of the earthquake magnitude scale. 1. Earthquakes and Seismic Waves Key Concepts . Today, most seismologists no longer follow Richter's original methodology because it does not give reliable results when applied to stronger earthquakes and it was not designed to use data from earthquakes recorded at epicentral distances greater than ~600 km. epicenter, the longer the lag time measured (Listen to student ideas.) Activity: Locating an Earthquake Epicenter Lecture 3 Damage from the earthquake was widespread, but the actual location of the earthquake (the epicenter) Accessed December 11, 2013. http://www.sciencecourseware.com/virtualearthquake/, USGS Earthquake Magnitude Policy (implemented on January 18, 2002). Once three seismographs have been located, find the time interval between the arrival of the P-wave . Richter scale Method of earthquake measurement based on the amplitude of seismic . Great-circle arcs are drawn on the globe using the distance of the earthquake to the station as a radius. moment magnitude scale: Similar to the Richter scale, but replacing its use starting in the 1970s for more accuracy in measuring big earthquakes (magnitudes > 3.5) from greater distances. 0000002094 00000 n They make a model of a seismographa measuring device that records an earthquake on a seismogram. Material is sheared side to side, perpendicular to the direction of wave propagation. (Grades [k0 |`2dGXGGGd00A(60P-e = F5n -f$ C 0000003966 00000 n minutes? Quick Tips. It is slower than the same earthquake's P wave and cannot travel through liquids. To locate the epicenter of the earthquake, seismologists use the . The travel-time graph This is determined by the P-and S-wave arrival times. 0000009174 00000 n How does the Mad Scientist. Earthquake Location 2 Using the skills that you acquired in the picking P and S arrivals, you can now locate an earthquake using real seismic records. 0000001978 00000 n Multiply the difference by 8.4 to estimate the distance, in kilometers, from the seismograph station to the epicenter. 0000000016 00000 n Develop a solution to a technological problem that has the least negative environmental and social impact. 0000005149 00000 n These distances are determined using a travel-time curve, which is a graph of Pand S-wave arrival times (see Figure 13.11). 17 Station St., Ste 3 Brookline, MA 02445. Many updates and improvements! 9 - 1) Identify the general term for waves released from an earthquake. For purposes of this activity, the least complicated and probably most accurate approach is to just use the term "magnitude," without needing to say "on the Richter scale" or "on the moment magnitude scale." What was the lag time (in minutes) at this location? If a quake is near the seismograph, the S-waves arrive shortly after the P-waves. minute apart, represent the passage of time (, Have any of you ever experienced an earthquake or know anyone who has? earthquake lab lab: locating the epicenters of earthquakes objective measurable learning outcomes use data from seismograms to locate the epicenters of Skip to document Ask an Expert Sign inRegister Sign inRegister Home Ask an ExpertNew My Library Discovery Institutions Western Governors University Southern New Hampshire University Point on Earth's surface directly above an earthquake's focus. HS]o01j6R0iMm4U=wL8]BE< Locating an Earthquake's Epicenter - American Geosciences Institute 13.4: Locating an Earthquake Epicenter - Geosciences LibreTexts These natural disasters may be mitigated, however, by insightful and creative engineering. 0000030504 00000 n Apr 8, 2020 One seismogram indicates the distance to the epicenter. Seismograms 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. to the lag time measured at this location? What is the time lag for the Seattle, Washington, seismic station? https://people.wou.edu/~taylors/gs104/lab5key.pdf Locating Earthquake Epicenters | CK-12 Foundation Apr 8, 2020 . The point beneath Earth's surface where rock breaks under stress and causes an earthquake. Scientists and engineers around the globe gather data through observation and experimentation and use it to describe and understand how the world works. How Can I Locate the Earthquake Epicenter? | Michigan Technological Engineers first determine where earthquakes are likely to occur, and how severe they are likely to be. Describe what the "magnitude" of an earthquake is. DOC Home - Westerville City Schools 0000010002 00000 n All 100,000+ K-12 STEM standards covered in TeachEngineering are collected, maintained and packaged by the Achievement Standards Network (ASN), 0000002658 00000 n 0000001736 00000 n (i. It shows the time required for P Looking at the nomogram, students click on each location data point to see where the three lines intersect to read the estimated magnitude. Solved ACTIVITY 2B Locating an Earthquake Figure 5 shows - Chegg S-P interval: The time interval between the arrivals of P and S waves. Use mathematical representations to support a claim regarding relationships among the frequency, wavelength, and speed of waves traveling in various media. technology, engineering or math (STEM) educational standards. S waves. Pwaves have the greatest velocity and reach the, seismic station first. 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. 9 - Overhead transparency of each of the handouts, Overhead projector (contact classroom teacher about this) and screen, Optional: overhead transparency or PowerPoint of, What do you know about the causes and impacts of Earthquakes? 0000002840 00000 n Using the real-world data in the living lab enables students and teachers to practice analyzing data to solve problems and answer questions, in much the same way that scientists and engineers do every day. In this 1-to-10 logarithmic scale, each succeeding level representing 10 times as much energy as the last. (Source: USGS, Wikipedia). Analyze and interpret data on natural hazards to forecast future catastrophic events and inform the development of technologies to mitigate their effects. located 1,000 miles from the 0000000956 00000 n 500p;333aXb3 \a.1. As you read and complete the activity, take notes so you can complete the. The point where your ruler crosses the middle line on the chart marks the magnitude (strength) of the earthquake. Please answer the following questions using the earthquake video - shake, shake, shake. 1. 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. Refer to the data table and use the difference in arrival times to determine the distance to the earthquake epicenter for Station 2. Click for facts and worksheets in PDF! Then do the same for the S-wave. Several thousand seismographs exist at locations around the planet, continuously measuring abnormalities in the Earth's movement. 0000003254 00000 n Earthquakes and Seismic Waves - carlisleschools.org Type text, add images, blackout confidential details, add comments, highlights and more. Activity 4: Locating an Earthquake Epicenter, The three basic types of seismic wave generated by an earthquake at its focus are P, waves, Swaves, and Surface waves. Thanks for your feedback! (Figure 3):. ACTIVITY 4.2B Locating an Earthquake Figure 4.5 shows - Chegg Find 23 millimeters on the right side of the chart and mark that point. 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). Even though the scale formulae are different, MMS retains the familiar continuum of magnitude values defined by the older scale. d>(ZvO= Make an overhead copy of each of the handouts. Earthquakes occur along faults, which are cracks in the Earths crust that build tension. Though the distance to the epicenter can be determined using a travel-time graph, the direction cannot be told. 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. gov For online instructions and current fees click here. epicenter: A point on the Earth's surface that is directly above the place where the underground forces of an earthquake originate. Locating An Earthquake Epicenter Worksheet Answers Triangulation is required to determine exactly where it happened. seismogram. HTn0"H@w=s(vxk8OM1px-{$_!o5|CS7RPr#V(0CUa%ZkuT9t};D Jj=.9,z!#@n5YCu>R88tfFRX=iRK One seismogram indicates the distance to the epicenter. 11 minutes elapsed between the first P wave and the last measurable surface wave. Finding the epicenter worksheet answer key. Reading Strategy. Since the 1970s, the use of the Richter magnitude scale has largely been replaced in the scientific community by the moment magnitude scale (MMS). Ch Person/Attorney Filing: - Superior Court - Maricopa County - superiorcourt maricopa.