Graph data access specification and implement based on epicenter data model.
基于Epicentre数据模型的图形数据存取规范及实现。
Finally we present the improving methods for reducing the errors of epicenter location.
最后提出减少震中定位误差的改进办法。
Results show that this method has certain precision and can be used in epicenter rough location.
结果显示本文结果具有一定精度，可用于震中位置粗略判定。
Determination of surface wave magnitude in the epicenter △ < 20 °.
震中距△<20°面波震级的测定。
A quiet seismic area appears near the earthquake epicenter.
震源区周围相当范围内显示平静特征。