The seismicity in yunnan region in the20th century occupies a front place in Chinese mainland in extremely high frequency strength and hazard rate.

20世纪云南地区地震活动以极高的频度、强度和成灾率而位居我国大陆之前列。

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"While it appears likely that the observed seismicity rate changes in the middle part of the United States in recent years are manmade, it remains to be determined if they are related to either changes in production methodologies or to the rate of oil and gas production, " wrote David J.

CNN: Debate over fracking, quakes gets louder

The rate of seismicity was high before the new event but reduced during the eruption and overnight has remained at a low level.

BBC: Mount St Helens spews out steam and ash on 5 October 2004