This area, Vanuatu, has been experiencing puzzling volcanic activity, and this part of the globe is very seismically active.
瓦努阿图地域一直在履历着使人困惑的火山勾当，地球的这个部分地震勾当是很活跃的。
The most active area of the earth surface is plate boundary, where most earthquakes and volcanic distribute on, while the region within the plate is relatively stable.
板块边界是地球表面最活动的地带，绝大多数地震、火山分布于活动带上，而板块内部则是相对稳定的地区。
Shangjing area is a volcanic dome formed by volcanic in active Early Cretaceous, in which the volcanic beds are dipping out with ring fracture and subvolcanic bodies intrusion in late stage.
上井地区是一个中生代早白垩世火山穹隆。火山岩岩层围斜外倾，环状断裂发育，晚期有潜火山岩侵位。
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