地震仪的

This project also compared and discussed the research results of OBS and onshore-offshore experiments in nearby areas. The conclusion is that the active airgun source is equivalent to an earthquake of about magnitude 0.5, and the airgun signals can be detected at the maximum distance of only about 250 km, which is not enough for the study of deeper lithospheric structure below the crust. Furthermore, the onboard airgun source and MCS streamer are difficult to operate in the shallow water of reef and island areas.

本项目还分析对比了周边地区海底地震仪探测和海陆联合地震探测的研究成果，发现人工气枪震源约相当于0.5级的天然地震，其信号传播距离最远只有250 km左右，很难探测到地壳以下更深部的岩石圈结构特征，此外船载的气枪震源和多道电缆在岛礁区和浅水区很难开展工作。

A: For earthquakes that occurred between about 1890 (when modern seismographs came into use) and 1935 when Charles Richter developed the magnitude scale, people went back to the old records and compared the seismograms from those days with similar records for later earthquakes.

答：对于在1890年到1935年（查尔斯·里克特提出地震规模概念）之间发生的地震，人们首先查找旧记录，找出那时地震仪记录的数据，再从1935之后的记录中找出与之数据相似的地震记录来做比较。

In terms of the documentation frequency of these historical data on earthquakes of 4.7 magnitude or above in the past 3000 years ( Table 5 ) the frequency was below 2 times per 10 years for most of the time before the Song Dynasty; when printing was invented in the Song Dynasty the frequency increased to 3 times per 10 years; after the invention of seismoscope in 1900 it reached 100-1000 times per 10 years.

从3000年来4.7级以上的(ji2 yi3 shang4 de0)历史地震的史料记录频度看（图5），宋朝以前的绝大部分时间都在（2次/10年）以下；宋朝出现了印刷术，记录频度增到（3次/ 10年）以上；1900年后现代地震仪问世，记录频度达到（100-1000次/10年）的高水平。

Along with the increasing density of digital seismologic observation network and the developing quality of seismographs, the theoretical and practical exploration of stress changes from seismic data has been the focus of recent debate within the seismological community.

随着数字地震观测台网的普及和数字地震仪性能的提高，用地震观测资料进行震源区应力变化和破裂过程的研究已成为国际地震学界的研究热点。

Using teleseismic body waves recorded by long period seismograph stations of the global seismic network, the temporal-spatial source process of the June, 4,2000 southern Sumatra M8.0 earthquake, Indonesia, was studied.

利用全球地震台网的长周期地震仪记录到的远震体波反演了2000年6月4日印度尼西亚苏门答腊南部M8.0地震的时空破裂过程。

Meanwhile, in North America, the EarthScope project is establishing a continent-wide network of GPS locators, seismographs, and other instruments to study what's happening below the crust.

与此同时，在北美开展的&地球透镜&计划正在建立一个包括全球定位系统定位仪、地震仪和其他仪器所组成的洲际范围的网络，以研究地壳下面的活动情况。

Meanwhile, in north america, the earthscope project is establishing a continent-wide network of gps locators, seismographs, and other instruments to study what's happening below the crust.

与此同时，在北美开展的&地球透镜&计划正在建立一个包括全球*系统定位仪、地震仪和其他仪器所组成的洲际范围的网络，以研究地壳下面的活动情况。

Meanwhile, in North America, the EarthScope project is establishing a continent-wide network of GPS locators, seismographs, and other instruments to study what's happening below the crust.

与此同时，在北美开展的&地球透镜&计划正在建立一个包括全球定位系统定位仪、地震仪和其他仪器所组成的洲际范围的网络，以研究地壳下

Meanwhile, in North America, the EarthScope project is establish ing a continent-wide network of GPS locators, seismographs, and other instruments to study what's happen ing below the crust.

与此同时，在北美开展的&地球透镜&计划正在建立一个包括全球定位系统定位仪、地震仪和其他仪器所组成的洲际范围的网络，以研究地壳下面的活动情况。

A seismograph is equipped with sensors called seismometers that can detect ground motions caused by seismic waves from both near and distant earthquakes.

地震仪配备了能探测到来自近震和远震的地震波所引起的地面运动的传感器，这个传感器被称为地震检波器。

I am accused of being overreligious," she said in her quiet, frank manner,"but that does not prevent me thinking the children very cruel who obstinately commit such suicide.""

客人们在卡罗利娜·埃凯家里，举止就文雅一些，因为卡罗利娜的母亲治家很严厉。

Designed by French fashion house Herm è s, this elegant uniform was manufactured in our home, Hong Kong, and was the first without a hat.

由著名品牌 Herm è s 设计，这件高贵的制服是香港本土制造，是我们第一套不配帽子的制服。