Below are three seismograms recording the most recent earthquake in this region.

Question

Below are three seismograms recording the most recent earthquake in this region. Each seismometer is named after the closest town. Exact locations of each seismic station are indicated on the map with blue triangles. The seismograms below represent the time period from just before the earthquake to 1.5 second after it occurred. The first arrivals of the P-waves and S-waves are labeled for you on each seismogram, along with the P-S time interval. Using the difference in arrival time between the P- and the S-waves, use the graph above right to determine the distance from each seismic station to the earthquake's epicenter. Find the appropriate time on the horizontal axis, follow it upward to the diagonal line, and read off the corresponding distance on the vertical axis. Mesaview ______km Hillside______km White Sands______km Which of the following locations was the source of the recent earthquake? (Use your answers above and the locations of each seismic station on the illustration on the last page of this handout to answer this question.) an eruption at Lava Mountain a landslide at Red Mesa fault movement at the Gray Cliffs fault movement along the Oceanic Trench

Explanation / Answer

answer

Mesaviwe - 78 km.

Hill Side - 45 km.

White Sand - 25 km.

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