北京时间2013年4月20日8时02分四川省雅安市芦山县发生7.0级地震（happen,measuring7.0 degrees）.
用英语这样说：
On April 20,2013,an earthquake measuring 7.0 degrees on the Richter scale happened in Lushan county of Ya'an City in Sichuan at 8:02 a.m.Beijing Time.