SICHUAN, May 31 -- A 4-magnitude aftershock hit Qingchuan, Sichuan Province at 14:22 pm Saturday according to Sichuan Seismological Bureau, China News Online reports.
BEIJING, May 31 (Xinhua) -- In the 24 hours ending Saturday noon, 215 aftershocks were monitored in southwest China's quake zone, according to the China Seismological Bureau.
No aftershocks above 4.0 on the Richter scale were detected and all the 215 aftershocks were measured below 3.9, the office said, adding that 9,519 aftershocks had been monitored since May 12 when the major quake struck.
The strongest aftershock, with a magnitude of 6.4, hit Qingchuan County in southwest China's Sichuan Province at 4:21 p.m. on May 25.
China Seismological Bureau has set up observation stations to continuously monitor diastrophism (deformations in the Earth's crust) and gravitational anomalies within the quake zone.
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