震源机制

利用SH波和P波振幅比测定中小地震的震源机制

Determination of Focal Mechanism by Using SH and P Wave Amplitude Ratio

用SH波和P波振幅比确定震源机制解

Determination of focal mechanism using SH to p amplitude ratio

小震震源机制P轴取向的预报应用

The Application of the P Axis-trend of Earthquake Mechanisms to Earthquake Prediction

求震源机制P波初动解的格点尝试概率法

A probabilistic grid test method of determining earthquake focal mechanisms using P-wave onset polarity data

这次地震的震源机制解表明其发震应力场的P轴是北偏西15°。

The epicenter mechanism solution of the earthquake showed that the P axis was N15 ° E.

青藏高原及邻区主应变率的方位与震源机制解中P轴、T轴的方向基本一致；

The orientations of principal strain rates are consistent with those of the P axis and T axis in focal mechanisms .

利用P波初动和短周期P，S波振幅测定川滇地区地震震源机制解和应力场

Earthquake focal mechanisms and stress field in Sichuan-Yunnan area determined using P wave polarity and short period P and s waveform data

利用P波初动及振幅比初步计算2005年11月26日九江―瑞昌地震余震震源机制

Focal Mechanism Solution of the Aftershocks of Jiujiang-Ruichang Earthquake on Nov.26,2005 by Using P Wave First Motion and S / P Amplitude Ratio

利用P波、S波初动和振幅比计算2000年姚安MS6.5地震序列震源机制解

Determining Focal Mechanism Solution of the 2000 Yao'an M_S6.5 Earthquake Sequence Using the First Motion and Amplitude Ratio of P and S wave

利用动态遗传算法对P波初动震源机制解进行反演计算，并与前人常用的反演计算方法对比，认为遗传算法在P波初动震源机制解中的应用是很有效的。

Moreover , we also have a research on the computation in genetic algorithms for earthquake focal mechanism from P waves first motion .

并通过分析S波、P波振幅关系探讨了岫岩地震前后震源机制的变化。

Besides , the hypocenter mechanisms by analyzing the S and P wave amplitude relation prior and posterior to Xiuyan earthquake are also discussed .

用长周期面波波形拟合及P波初动方向估计中等地震的震源机制

To estimate focal mechanisms of moderate earthquakes using a long period surface waveform fitting method as well as first motion signs of P waves

用P波、S波初动和振幅比计算中小地震震源机制在云南地区的应用

The application of focal mechanism determinations of moderate-small earthquakes in Yunnan Province using the first motion and amplitude ratio of P and S wave

13次较大地震震源机制解的主压应力P轴具有较大的垂向分量，水平投影方向为南东；

The main pressure P axes of focal mechanisms of 13 large earthquakes have bigger vertical components , and its horizontal project orientation components are in all southeast direction ;

讨论了用（A（PP）/AP）值对地震震源机制类型给出粗略的估计的可能性。

The possibility to use the ( App / Ap ) values to give an approximate estimation for the focal mechanism type is discussed .

本文采用P、S最大振幅比资料测定中、小地震震源机制参数的方法，测定了澜沧&耿马地震前后震区182个中、小震的震源机制参数。

The source mechanism parameters of 182 moderate and small events in the seismic area before and after Lancang-Gengma Earthquake have been determined by the method of P and S maximum amplitude ratio .

结果表明，二种求解震源机制得到的节面（A、B）、力轴（P、T）比较接近，对应效果比较好。

It is shown that the nodal plane ( A , B ) the stress axes ( P , T ), provided by two methods are almost same . The corresponding is good .

此外，还讨论了Vp/Vs异常与地震类型，震源机制的关系。

Besides these , we have discussed the relationship between the anomaly of Vp / Vs and types of earthquake as well as the source mechanism .

由这些震源机制解结果中所有P轴、Τ轴做出的运城盆地的平均应力场，与华北区域地壳应力场和山西平均应力场的结果基本一致。

The mean stress field in Yuncheng basin calculated by all p and T axes of the focal mechanism solutions is coincident with North China regional stress field and Shanxi mean stress field essentially .

近震观测波形和理论波形的良好拟合效果，表明CAP反演结果稳定、可靠，说明该方法也同样适用于深震的震源机制反演。

The results with well fitted synthetic and observed waveforms indicate that this method is also suitable to invert the mechanism of deep earthquake .

用SH波和P波振幅比测定地震震源机制具有诸多优点，但它对台站布局要求较高。

It has many advantages to determine the focal mechanism by using SH and P wave amplitude ratio , but requires highly for the distribution of stations .

地震分两种类型：一种是微震活动，初动呈象限分布的双力偶滑动型震源机制，S波能量高于P波能量。

There are two types of microearthquakes : one is the microearthquakes the first motion of which distributed in a quadrant belongs to double-couple sliding focal mechanism , with S wave energy higher than P wave energy .

经系统地查阅台网和周围其他台站1990&2002年的全部记录，读取垂直向的P、S最大振幅数据，反演计算得到620个小地震的震源机制解。

We examined all the records in the network and its peripherial stations from 1990 to 2002 , measured the maximum amplitudes of , and made an inverse calculation of the focal mechanism solutions of 620 small events .

用F-K方法确定腾冲火山区震源机制

Source Estimation in tengchong volcano Area using F-K method

用P、S波振幅比方法反演了1988年11月22日肃南5.7级地震序列的震源机制，计算了对应的P轴T轴。

The source mechanisms of the seismic sequence of Sunan earthquake ( Nov.22,1988 , M5.7 ) have been inverted by using the method of the ratio of P wave and S wave amplitudes , the corresponding P and T axes calculated .

震源机制解所反映的最大主压应力轴（P轴）以菲律宾大断层为界，北部主要为NW向；

From the focal mechanism solution data , the maximum principal stress direction ( P axis ) varies from the northern region of Philippine fault to the southern region of the fault .

笔者在断层活动形迹的野外调查和观测的基础上，结合TM遥感影象特征解译和地震震源机制解资料，分析了郯庐断裂中段第四纪活动的分段行为特征。

Based on field observations together with TM imagery interpretation and focal mechanism solutions of earthquakes , this paper describes Quaternary active features and segmentation behavior of the Tan-Lu fault zone .

6次中强地震的震源机制解表明，该地区P轴方位与主压应力方向基本一致，因此该地区发生破坏性地震的可能性不大。

The focal mechanism solutions of 6 mid strong earthquakes in south Ningxia region show that the earthquakes occurred under the affect of principal compressive stress of NE , with no somewhat change in comparison with direction of principal compressive stress of regional stress field .

空间与地面测量及震源机制解共同证实，东南沿海现时应力场主压应力方位为NW（NWW）-SE（SEE）。

Space geodesy , terrestrial deformation survey and focal mechanics resolution together confirm that the present-time principal compressing stress orientation is NW ( NWW ) - SE ( SEE ) .

常熟-太仓M5.1地震精定位及震源机制解

Precise locating and focal mechanism solution of the Changshu-Taicang earthquake of M5.1