信不着中共的国家地震局,就听听 MIT 的专家怎么说吧。远来的和尚会念经不是?:-)
The major earthquake that devastated China last month was something of a seismological oddity, seismologists report in a new analysis. The faults that caused the temblor rarely rumble.
The earthquake was also a complete surprise to scientists. MIT seismologists who had been operating an array of 25 seismograph stations in the region for more than a year had found no hints that a large temblor might hit.
"Nobody was thinking there would be a major seismological event," in that area, said MIT's Leigh Royden. "This earthquake was quite unusual."
Similar events in the area occur only once in every 2,000 to 10,000 years on average, the researchers say, though they caution that because earthquakes can sometimes occur in clusters, residents and officials should still be wary of another possible large-scale earthquake.
http://news.yahoo.com/s/livescience/20080630/sc_livescience/chinaearthquakewasraretype
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