震中距

总结出震级M＿L、震中距、周期和最大S波振辐之间的关系。

Relations of magnitude M , epicentral distance , period and maximum amplitude of space were summarized .

结果表明：加卸载响应比阈值P0（Z）和响应比月均值PM（Z）的大小与地震的震级、震中距及异常出现的早晚并非完全呈线性相关；

The results show that it is not a complete linear correlation between the threshold value P0 ( Z ) or PM ( Z ) and the seismic magnitude or the epicentral distance or the occurrence time of anomalous P ( Z ) and PM ( Z ) .

针对震中距的影响，主要分析了C类、D类场地。

In order to discuss distance influence , we analyze C and D site .

用分布在北京地区各方位上，震中距在20°&100°范围内的120次远震在本区15个地震台上的P波到时，研究北京地区地壳和上地幔的三维速度结构。

By use of the teleseismic P arrival times at 15 stations of Beijing network for 120 events distributing over various azimuths , we studied the three-dimensional P velocity structure under Beijing region .

对震中距20°~60°的9次远震P波波形三分向记录，采用接收函数法反演了地壳和上地幔的S波速度结构。

The method of receiver function is used for nine high quality P wave recordings with three components at distance of 20 °~ 60 ° to inverse vertical distribution of shear wave velocity beneath the station .

对震中距25°~35°且记录良好的5次地震的ScS震相，采用旋转相关函数法反演了岩石圈的剪切波分裂参数。

The approach of rotated correction function is applied to five satisfactory ScS wave recordings at distance of 25 °~ 35 ° to inverse shear wave splitting parameters of lithosphere .

根据天水地震台SK地震仪近年来记录的338个震例的资料，用最小二乘法求出最大振幅面波与初至波到时差同震中距的关系式，并与JB表进行了对比。

According to records of 338 earthquakes in recent years by SK seismograph of Tianshui seismic station , a formula of relationship between travel time difference of maximum surface wave from primary wave and epicentral distance is given by least squares method .

文中集中分析了PPP和PPS型二次波震相的振幅、波形和到时差等特征，及其与震中距、界面两侧波速差、界面结构和介质吸收等因素的关系。

The main attention was concentrated to analysis of amplitude , waveform and arrival time delay of PPP and PPS twice-reflected phases , and to analysis of their relations with epicentre distance , velocity contrast on both sides of boundary , structures of the boundary and absorption of the medium .

结果显示，在震中距0～40km内，量规函数偏小。

The sample number that its deviation is within 0.2 reached 70 % after correction . The results show that the gage function tends to smaller when the epicentral distance is within 0 ~ 40km .

使用DCS-302数字磁带记录地震仪在近场（震中距△≤5km）观测人工爆破源产生的地震波，在不同方位、不同震中距和土层条件下得到了9条近场地面运动加速度记录。

Nine seismograph maps of near-field ground acceleration , seismic waves from man-made explosion seismic source , were recorded by DCS-302 portable digital seismometers which were located at different sites where direction , epicentral distance and soil conditions are different .

时间-空间域：针对50-300Hz频段研究发现，电离层扰动主要出现在震中距400km的范围内，正负扰动都有出现。

Time-space region : Aiming at 50-300 Hz frequency band in time-space region , we found that ionosphere disturbances mainly appear in the 400 km range of distance from epicenter , and the positive and negative anomalous are both observed .

并结合了地震台网的定位方法，由单台记录的各类主要震相从J-B走时表得到震中距，然后进行地震定位。

Then combining with the method of earthquake locating for seismic network in which , the epicenter distance can be obtained from J-B travel timetable based on different types of main phases of earthquake recorded at a single substation , and locate the earthquake .

震中距△<20°面波震级的测定

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

行波法的精度与震中距有关。

The accuracy of travel ling-wave method is related to epicentral distance .

震中距对不同类别场地峰值加速度的影响

The Influence of Epicenter Distance to Peak Ground Acceleration on Different Sites

对震中距和方位角的高精度测定

High precision determination of the epicentral distance and azimuth angle

山西地震台网震级偏差与震中距关系的讨论

Relationship between Magnitude Deviation and Epicentral Distance of Seismological Network in Shanxi

震级、震中距和场地条件对反应谱特性影响的统计分析

Statistical Analysis on the Influence of Magnitude , Distance and Site Condition on Response Spectra

不同的异常类型可能与地震的大小、震中距的远近以及构造环境有关。

The different anomalous types is relative to the magnitude , epicenter distance and tectonics .

合并症表现。观测结果得出见波波形、功率谱、持续时间相对于不同震中距是稳定的；

The resultS show that the waveform .

震中距克赖斯特彻奇市56公里。

The epicenter was56 km from Christchurch .

汶川地震滑坡的分布特点及最大震中距分析

Analysis of distribution characteristics of landslide induced in Wenchuan earthquake and relevant maximum epicenter distance

烈度、震中距和场地条件对地面运动反应谱的影响

Influences of Intensity , Epicentral Distance and Site Condition on Response Spectra of Strong Ground Motion

他们认为，降低破坏程度的另一个因素是，震中距人口聚居区很远。

An additional mitigating factor was the epicenter considerable distance from populated areas , they argue .

初步总结了不同震中距时，竖直摆倾斜记录地震波动的能力。

The ability of recorded seismogram about tilting vertical pendulum was generalized preliminarily with different epicentral distance .

但是，异常幅度与震级、震中距关系不明显；

But the relationships among amplitude of anomaly , magnitude of earthquake and epicenter distance are not obviously .

该方法以考虑土质定量特征的地震动参数衰减规律为基础，分别用震级、震中距和土层等效周期来表述地震影响的地区性。

This method is based on the attenuation law of earthquake ground motion parameters considering soil characteristics quantitatively .

各异常量（时间、幅度）随震级的加大，震中距的缩短而增加；

The amplitude , duration and areal extent of the anomaly increase with the magnitude of the earthquake ;

随着观测点的震中距及观测点与发震构造的位置关系不同，断层形变表现出不同的特征。

The fault deformation shows different characteristics with different distance among observation sites and earthquake center or tectonic belt .

天水地震台最大振幅面波与初至波到时差和震中距的关系

Relationship between travel time difference of maximum surface wave from primary wave observed by Tianshui seismic station and epicentral distance