Aftershocks have rumbled across the region since the major quake — including one Tuesday measured by the U.S. Geological Survey at magnitude 5.7 — adding to jitters among survivors and in some cases causing more damage. No damage or injuries were reported from Tuesday's tremor.A major temblor Sunday knocked down thousands of buildings that had survived the initial quake, and killed eight people.
One quake expert said Tuesday that aftershocks in the area could continue for several months.
"Judging from previous earthquakes of a similar magnitude, this time the aftershocks may last for two or three months," He Yongnian, a former deputy director of China Seismological Bureau, was quoted as saying by Xinhua.
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