Deep_Earth_Lecture

Deep_Earth_Lecture - Locating earthquake epicenters Using...

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Unformatted text preview: Locating earthquake epicenters Using the time-distance graph Great circles and small circles Seismic discontinuities and the crust the Mohorovicic discontinuity (Moho) continental versus oceanic crust Mantle composition upper versus lower mantle Core outer versus inner core chemical composition Chapter 16: Probing the Deep Earth Next lecture: Chapter 16 http://quake.usgs.gov/recenteqs/latest.htm Locating earthquake epicenters Using the time-distance graph Great circles and small circles Seismic discontinuities and the crust the Mohorovicic discontinuity (Moho) continental versus oceanic crust Mantle composition upper versus lower mantle Core outer versus inner core chemical composition Chapter 16: Probing the Deep Earth Next lecture: Chapter 16 Seismograms Time-distance graph Measuring the time intervals between arrivals of P, S, and L seismic waves. Avoiding error no. 1: transfer a time interval of minutes on the seismogram to the same number of minutes (not inches) on the time-distance graph. Correct! Avoiding error no. 2: place the beginning of the time intervals between P, S, and L arrivals on the P curve. This point in time refers to the arrival of P at a distant station, not to the time of the earthquake. Correct! Locating earthquake epicenters Using the time-distance graph Great circles and small circles Seismic discontinuities and the crust the Mohorovicic discontinuity (Moho)...
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Deep_Earth_Lecture - Locating earthquake epicenters Using...

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