Study of Small Earthquakes Activity Characteristics before 
the Zigui 4.5, 4.7 Earthquake in 2014
WU Haibo,SHEN Xuelin,DU Chengchen,CHEN Junhua,WANG Jie
jgg . 2015, (5): 751 -757 .  DOI: 10.14075/j.jgg.2015.05.006