震源

Analysis of the strain field discovers that the principal compressive and the principal tensile strain rates in the epicenter area are -30.840×10-9/a and 13.956×10-9/a respectively before earthquake, and the principal compressive strain axis is in a direction of N105.4°E which is consistent with the average direction at N107.5°E of the principal compressive stress axis from focal mechanism result.

应变场分析发现，震前震中区的主压与主张应变率分别为-30.840×10-9/a与13.956×10-9/a，主压应变轴N105.4°E与震源机制解得到的主压应力轴的方向N103°E一致。

Based on field investigation of the surface rupture and focal mechanism study of the aftershocks,we studied the geological relationship of main rupture,secondary rupture and trigged rupture.

文中应用地震地表破裂调查资料、余震分布和震源机制资料，论述了该次地震的主破裂、次级破裂、触发破裂等方面的地质特征。

Wenchuan M8.0 earthquake ; Longmenshan fault ; Surface rupture ; Focal mechanism ; Aftershocks

汶川8.0级地震；龙门山断裂；地震地表破裂；震源机制；余震分布

On the basis of this, the finite difference forward simulation program of crosswell seismic wave equation was compiled.

在此基础上，编制了跨孔波场交错网格有限差分正演程序，并应用该程序对半空间粘弹性跨孔模型进行了正演计算，得到了震源在不同位置时的波场快照及地震记录图。

Geologist thinks that fault is the surface expression of focus.

地质学者认为断层是震源在地表的表现。

Every link of source shot, wave spread, geophone receiving and seismic recording all has influence to the data fidelity.

震源的激发、波的传播、检波器的接收和仪器记录各个环节对地震信息的保真度都有影响。

Being a geophysicist I was immediately interested in how large the earthquake was and where it had occurred.

"强烈的地震通常令人心神不安，"她说，"作为地球物理学家，我急于想知道震级和震源。"

An earthquake's point of initial rupture is called its focus or hypocenter.

据我国地震台网的初始破裂点的是所谓的重点或震源。

An earthquake's point of initial ground rupture is called its focus or hypocenter.

地震的最初地裂点称为震源（英文为focus或hypocenter）。

We also calculated the hypocenter depth of the earthquake in different crust models using sPn phases.

初步了解sPn震相的一些特征，并在不同地壳模型下用sPn-Pn的走时差计算了该地震的震源深度。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。