The strongest of more than 200 tremors was measured at 6.1 by the USGS as shaking continued through the night.
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Improvements to buildings and emergency response helped limit the impact when a 7.2 magnitude quake struck Taiwan.
On October 7, a series of powerful earthquakes hit remote western Afghanistan with much of the devastation hidden.
No casualties were immediately reported as rare quake shakes densely populated city of 8.3 million.