Murray State University

• PHY 131

Student Exploration: Earthquakes 2 – Determination of Epicenter Directions: Follow the instructions to go through the simulation. Respond to the questions and prompts in the orange boxes. [NOTE TO TEACHERS AND STUDENTS: This exercise assumes that you have a data table and graph made while using the Earthquakes 1 – Recording Center Gizmo. If you do not have those, or have never used that Gizmo before, do that first.] Vocabulary: body wave, earthquake, epicenter, fault, focus, P wave, S wave, seismic wave, seismogram, seismograph Prior Knowledge Questions (Do these BEFORE using the Gizmo.) Three dogs meet in a park. Each dog is attached by a leash to its owner (triangles). 1. What does each colored circle represent? their owners 2. Where could all the dogs meet in one place? Draw this point on the ✏️ diagram. where the three circles touch 3. Is there another spot where all three dogs could meet? Explain: no Gizmo Warm-up When you used the Earthquakes 1 – Recording Station Gizmo, you learned how to find the distance from a recording station to the epicenter. With the Earthquakes 2 – Determination of Epicenter Gizmo, you will use data from three recording stations to find the exact location of the epicenter. Click Play ( ), and then click Pause ( ) when the seismograms are complete. Compare the three seismograms. 1. Which recording station is closest to the epicenter? How do you know? c because the waves are closer 2. Which recording station is farth