Graph data access specification and implement based on epicenter data model.

　　基于Epicentre數據模型的圖形數據存取規范及實現。

　　Finally we present the improving methods for reducing the errors of epicenter location.

　　最后提出減少震中定位誤差的改進辦法。

　　Results show that this method has certain precision and can be used in epicenter rough location.

　　結果顯示本文結果具有一定精度，可用于震中位置粗略判定。

　　Determination of surface wave magnitude in the epicenter △ < 20 °.

　　震中距△<20°面波震級的測定。

　　A quiet seismic area appears near the earthquake epicenter.

　　震源區周圍相當范圍內顯示平靜特征。