The middle Mississippi River valley frequently experiences earthquakes. Three earthquakes that occurred in late 1811 and early 1812 near New Madrid, Missouri may have been the strongest earthquakes in recorded history for North America . Surface movements from these earthquakes briefly reversed the flow of the Mississippi River and formed a large lake. Effects from these earthquakes were observed as far away as Boston , Massachusetts , and the quake may have been felt by Native Americans in the Austin area (Frohlich and Davis, 2002).
Below are three seismograms from a magnitude 3.0 (M 3) earthquake that occurred in the New Madrid area at approximately 3:46 AM on June 19, 1987.
Fill in the chart with the appropriate information for each seismogram.
Transcribed Image Text:The middle Mississippi River valley frequently experiences earthquakes. Three earthquakes that occurred in late 1811 and early 1812 near New Madrid, Missouri may have been
the strongest earthquakes in recorded history for North America. Surface movements from these earthquakes briefly reversed the flow of the Mississippi River and formed a large
lake. Effects from these earthquakes were observed as far away as Boston, Massachusetts, and the quake may have been felt by Native Americans in the Austin area (Frohlich
and Davis, 2002).
Below are three seismograms from a magnitude 3.0 (M 3) earthquake that occurred in the New Madrid area at approximately 3:46 AM on June 19, 1987.
03:47:00
03:47:20
LTN
03:46:40
GOIL
POW
03:46:40
03:47:00
hours:minutes:seconds (Each of the smallest increments is one second.)
Fill in the chart with the appropriate information for each seismogram.
Location
LTN
GOIL
POW
03:47:20
P-wave arrival time
03:47:40
03:47:40
S-wave arrival time
S-wave arrival
minus
P-wave arrival time
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