震源深度

考虑吸收时确定震源深度的宏观地震方法

MACROSEISMIC method determining depth of focus taking into account absorption

震源深度是地震定位的一个重要参数。

Depth of focus is a very important earthquake parameter .

美国地质调查局（USGeologicalSurvey）测得初始地震的强度为5.9级，震源深度10公里。

The US Geological Survey measured the magnitude of the initial quake as 5.9 and the depth at 10km .

用sPn计算内蒙地震的震源深度

Application of sPn to focal depth determination in Inner Mongolia

用sPn震相测定近震震源深度

Determination of focal depth with the sPn phase

确定震源深度的PTD方法及其应用

A PTD method a new method for determinating focal depth and its application

本文着重研究了滇西地区（N23.5°～28°；E97.5°～101.5°E）地震活动概况、地震时空展布、地震活动特点以及震源深度分布。

General seismicity , time-space distribution of earthquakes , seismicity features and focal depths distribution in Western Yunnan ( 23.5 ° - 28 ° N , 97.5 ° - 101.5 ° E ) have been studied in this paper .

深震集中分布在东北地区以42°N，130°E为中心的2°×2°范围内，震源深度平均约560km。

The deep focus events are distributed in Northeast China , concentrated in a region of 2 °× 2 ° of which central point is 42 ° N , 130 ° E. Average depth of the events is about 560 km .

本文利用远震P波及SH波和区域地震P（nl）波波形反演方法，测定了华北9次强震的断层面解、震源深度及地震矩。

The source parameters of 9 strong events in the North China region have been determined with a joint moment tensor inversion of teleseismic and regional distance body waves ( P , SH , Pnl ) .

该区震源深度的分布同地壳Q结构表现有良好的相关性，在东部地区绝大多数的构造地震发生在Q值较大的地壳中部层位内。

The distribution of hypocenter depth in the area has shown a good correlation with the crustal Q structure , with most tectonic earthquakes in the eastern part occurred in the middle layer where the Q value is comparatively large .

根据震源深度的分布，在台湾台东县东南部海域，即东经120°120°30′、北纬22°23°范围，存在一个V字形地震震源带底面。

Based on the distribution of focal depths , there is a ' v - shaped ' focal zone bottom beneath southeastern sea area of Taidong county , Taiwan , that is , in the area of 123 ° 30 - 123 ° 00E , 22 ° - 23 ° N.

2002年6月29日在吉林汪清（北纬43.5°，东经130.6°）发生Mb7.2地震，震源深度593km。

An M_b 7.2 earthquake occurred in Wangqing , Jilin Province ( 43.5 ° N , 130.6 ° E ) on July 29,2002 , at depth of 593 km .

88次地震震源深度分布在2～16km，优势深度为9～11km。

The focal depths of 88 events distributed in 2 ~ 16km , the superior depth is 9 ~ 11km .

震源深度呈现由浅而深、通常超过25km的变化，孕育时间一般为3-4年。

The source depth showed the variation from shallow to deep and generally over 25 km , and as a rule , the variation appeared 3-4 years before the shocks .

震源深度优势分布集中在15~25km以内，与当地存在深度为10km以上低速沉积层的地质构造情况相一致；

The dominant distribution of focal depths is in the range 15 ~ 25km and the result is more consistent with the local geologic setting that there is a low velocity sediment layer above the depth 10 km .

西浅东深的林县西断裂沿震源深度包络线向深部延伸与震区下方的近垂直的地壳断裂在15km深处交汇。

It is gathered at the depth of 15km that the shallow west and the deep east in Linxian extends to depth along the envelope curve and nearly vertical crustal fault beneath the seismic area .

在哈佛全球CMT目录中，震源深度与矩心深度的分布呈现出明显的规律性，从统计上说，浅源地震的震源深度大于矩心深度，而中深源地震不具有这样的特征。

Analysis of the Harvard global CMT catalogue reveals a significant regularity of the distribution of hypocenter and centroid depths . Statistically , for shallow earthquakes , the hypocenter depth seems systematically greater than centroid depth , while for deep and intermediate depth earthquakes there is no such a characteristic .

结果表明：海原断层实际是深度不超过10km的铲状逆掩推覆断层，而海原大震的震源深度为15～20km，因此，海原断层与该次大震的发生无关。

The result shows that the Haiyuan fault is an overlap fold fault taking the shape of the shovel with depth less than 10 km , which bears no relation to occurrence of the 1920 Haiyuan earthquake because the focal depth of the earthquake is 15 ~ 20 km .

对2002年8月20日的小震群进行了分析，结果表明这些地震发生在长白山天池内的西南部，震源深度距离天池水面一般小于4km深，震群的震中位置呈北西向线性分布。

By analyzing the earthquake swarm recorded in 20 Aug. , 2002 , we found that the events are almost all located within the southwest of Tianchi Lake , and the focal depths are usually less than 4 km from the surface , the epicenters tend to northwest direction .

接着利用3283个近震（震源深度大于40km）分段测试了板块内的速度异常分布，结果表明速度异常随深度的增加而减小，这与地幔内的温度变化有关。

Secondly , we use 3283 local and regional earthquakes with focal depths greater than 40 km to study the vertical distribution of velocity anomaly in the slab . Our result shows that the amplitude of velocity perturbation decreases with depth , which is related to the variation in temperature .

山西地震的震源深度分布

The distribution of the focal depths of earthquakes in Shanxi Province

受火山构造环境影响，地震活动存在着外围边缘强，震源深度分布深；

Volcanic tectonic environment has influence on seismicity in the area .

测定震源深度的意义的初步讨论

Preliminary Discussion on Implication of Determination on Source Depth of Earthquake

唐山地震震源深度分布与地壳结构的关系

The relationship between focal depth and crustal structure for Tangshan earthquake

这次地震震源深度交浅，只有11公里。

The quake hit at a shallow depth of 11 km .

震源深度与矩心深度的分布特征及其与震源机制类型之间的关系

Distribution of Hypocenter and Centroid Depths and Its Focal Mechanism Dependence

关于上海及邻区震源深度的探讨

Discussion about the Depth of Earthquake Source in Shanghai and Its Vicinity

前震和普通震群震源深度分布的比较

Comparison for the Focal Depth of Foreshock and Common Swarm

据报道，此次地震震源深度4公里。

The fresh quake is reported to have a depth of 4-kilometers .

地震序列中各地震的震源深度都比较浅。

Earthquake the hypocenters of all earthquake sequences are shallow ;