The magnitude of an earthquake is related to the area of the fault on which it occurs – the larger the fault area, the larger the earthquake. The San Andreas Fault is 800 miles long and only about 10-12 miles deep, so that earthquakes larger than magnitude 8.3 are extremely unlikely.
The largest earthquake ever recorded by seismic instruments anywhere on the earth was a magnitude 9.5 earthquake in Chile on May 22, 1960. That earthquake occurred on a fault that is almost 1,000 miles long and 150 miles wide, dipping into the earth at a shallow angle. The magnitude scale is open-ended, meaning that scientists have not put a limit on how large an earthquake could be, but there is a limit just from the size of the earth. A magnitude 12 earthquake would require a fault larger than the earth itself.
In the first paragraph, the words in bold can be replaced, with no change in the meaning, by:
A
leads – for sure
B
happens – probable
C
differs – usually
D
takes place – improbable
E
resists – virtually
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Resposta:
Alternativa (D)
takes place - improbable
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