Earthquakes of magnitude 5.0 cause light damage near the epicentre; those of 6.0 are destructive over a restricted area; and those of 7.5 are at the lower limit of major earthquakes. The total annual energy released in all earthquakes is about 10 25 ergs, corresponding to a rate of work between 10 million and 100 million kilowatts.
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Answer:
Earthquakes of magnitude 5.0 cause light damage near the epicentre; those of 6.0 are destructive over a restricted area; and those of 7.5 are at the lower limit of major earthquakes. The total annual energy released in all earthquakes is about 10 25 ergs, corresponding to a rate of work between 10 million and 100 million kilowatts.
Answer:
On this scale, intensities up to 5 are felt but cause no damage, while intensities from 6 to 12 cause increasing amounts of damage.