地球内部岩层破裂引起振动的地方称为震源。它是有一定大小的区域,又称震源区或震源体,是地震能量积聚和释放的地方。人为因素引起的地震的震源称人工震源,如人工爆破(炸药爆破,核弹试验)等。天然地震震源和人工爆破震源的性质有很大区别。一般而言,天然地震主要发生在断层上,以剪切错动为止;而人工爆破震源却是以一点为中心向周围膨胀的过程。采用地震波形资料进行地震矩张量反演,人们可以大致地区分这两种震源的特性。
... dormant volcano休眠火山 earthquake focus震源 elastic rebound弹性反弹 ...
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... earthquake intensity地震强度 earthquake origin震源 earthquake period地震期 ...
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震源深度 depth of focus ; [地震] focal depth ; hypocentral depth ; focus depth
震源距 [地震] hypocentral distance ; distance from epicenter ; focal distance
电火花震源 [海洋] sparker ; spark source ; sparker source ; electricsparks
震源距离 hypocentral distance ; Distance to centrum
可控震源 vibroseis ; [地震] controlled source ; vibrator ; seismic vibrator
海上震源 vaporchoc
地震震源 earthquake focus ; earthquake source
共震源 common source
震源强度 source level ; source strength
Ground motion is affected by three factors such as earthquake source, transmission and local site conditions.
而影响地震动的因素包括震源、传播途径和局部场地条件。
参考来源 - 山东地区场地条件对地震动参数影响的研究The generation of a earthquake is detendned by the evolution of seismic source and the influencefrom outside.
一次地震的孕育过程由震源自身的演化过程和所受外界影响两种因素决定。
参考来源 - 地震活动不均匀性及地震断层相互作用的力学机制研究·2,447,543篇论文数据,部分数据来源于NoteExpress
由于 P 波和 S 波以不同但相当恒定的速度传播,它们到达的间隔与到震源或初始破裂点的距离成比例地增加。
Because P and S waves travel at different but fairly constant speeds, the interval between their arrivals increases in proportion to the distance from the earthquake focus, or initial rupture point.
震源有20英里深、强度7.0级。
The earthquake was more than 20 miles deep and had a magnitude of 7.0, the USGS said.
该震源位于宫城县沿岸深度约40公里处。
The epicenter was about 40 kilometers under the sea off the coast of Miyagi prefecture.
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