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MEXICO
RTXJ819
September 30, 1999
Waverly Person, chief of the United States Geological Service National Earthquake Service studies a seismograph...
Golden, USA
Waverly Person, chief of the United States Geological Service National Earthquake Service studies a .....
Waverly Person, chief of the United States Geological Service National Earthquake Service studies a seismograph displaying the 7.5 magnitude earthquake that struck the western Mexico coast September 30. The high gain graph in the center of the display is off scale due to the size of the quake and is displaying the event as it was transmitted through the earth's surface to sensors in Golden.
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