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根据美国地质调查局数据,自1964年以来,全球6级以上地震明显增多,在1964~1973年的10年间,平均每年发生6级以上地震44次;到了2004~2012年,仅2011年就发生6级以上地震177次,9年间共发生1063次。在全球范围内,平均每3天就有一次6级以上地震发生,频率较40年前快了61.7%。新世纪以来,2007年是地震最频繁的一年,2008年以后,8.5级以上的地震开始变得更为常见,这就预示着地球进入了新的地震周期。河北处于地震带上
According to the data from the United States Geological Survey, since 1964, earthquakes of magnitude 6 and above have increased remarkably in the world. On average, earthquakes with magnitude 6 or more occurred 44 times per year in the 10 years between 1964 and 1973; by 2004-2012, they occurred only in 2011 There were 177 earthquakes of magnitude 6 or above, with 1063 occurred in 9 years. Globally, earthquakes of magnitude 6 or above occur on average once every 3 days, 61.7% faster than 40 years ago. Since the beginning of the new century, 2007 has been the most frequent earthquake. After 2008, earthquakes above 8.5 have become more commonplace, which indicates that the earth has entered a new earthquake cycle. Hebei is in an earthquake zone