据美国地质测量局测量，其中一次余震的震级道道5.7级。
One of the aftershocks measured magnitude 5.7, according to the US Geological Survey.
对地震大小和频率更详细的统计可以从美国地质测量局得到。
More detailed statistics on the size and frequency of earthquakes is available from the USGS.
英国国家陆地测量局的斯科特•辛克莱说：“司机们应该在看地图技能方面补补课了。
"It's time for motorists to take a refresher in map-reading skills," said Scott Sinclair of national mapping agency Ordnance Survey.
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