华南地震

我国海洋地震监测研究起步较晚，深入开展相关的技术方法研究势在必行。通过对我国自主研制的滨海型宽频带海底地震仪的工作原理、总体设计以及野外的布放回收过程进行系统介绍，并对其在我国黄渤海海域的实践过程进行数据质量分析，结果显示：滨海型宽频带海底地震仪的总体设计十分合理，不仅有效降低了渔业活动、海流、生物腐蚀等外部因素对仪器的影响，又可满足低功耗供电和高质量数据记录，也可以有效克服内部时钟漂移的影响；与常规利用声通讯释放技术的回收方式不同，地震仪回收作业采用潜水员水下作业的方式，有效减少了系统的成本，适合滨海海洋地震勘探；与陆地台站大连台对比分析，滨海型宽频带海底地震仪亦可记录到清晰可靠的P波、S波信号，数据质量较高。

It is imperative to carry out marine seismic observation research，which started late in China. Based on the systematic introduction of the working principle，overall design，field release and recovery process of the coastal wide-band ocean bottom seismometer（OBS）that is independently developed in China and quality analysis of the data obtained in Huanghai and Bohai Sea, the following understandings are obtained：the overall design of the coastal wide-band OBS is quite reasonable, which not only effectively reduces the influence of external factors, such as fishery activities，ocean currents and biological corrosion on the instrument，but also meets the requirements of low power supply and high quality data recording, and can effectively overcome the influence of internal clock drift; different from the conventional recovery method using acoustic communication release technology，the coastal type OBS is recovered by divers，which effectively reduces the cost and is suitable for coastal marine seismic exploration; compared with Dalian station, the coastal type OBS can also record reliable P-wave and S-wave signals with high data quality.

引言
1 仪器及设计原理
2 资料采集
3 观测数据的质量分析
4 结语

图1 TDO-63B型SOBS结构示意图<br/>Fig.1 Structure diagram of TDO-63B SOBS

图1 TDO-63B型SOBS结构示意图
Fig.1 Structure diagram of TDO-63B SOBS

表1 TDO-63B型SOBS主要技术指标<br/>Table 1 Main technical specifications of TDO-63B SOBS

表1 TDO-63B型SOBS主要技术指标
Table 1 Main technical specifications of TDO-63B SOBS

图2 已回收的SOBS及大连台位置图<br/>Fig.2 The location of recovered SOBS and Dalian station

图2 已回收的SOBS及大连台位置图
Fig.2 The location of recovered SOBS and Dalian station

图3 TDO-63B型SOBS释放过程<br/>Fig.3 Release process of TDO-63B SOBS

图3 TDO-63B型SOBS释放过程
Fig.3 Release process of TDO-63B SOBS

表2 SOBS回收基本信息表<br/>Table 2 Basic information of the recovered SOBS

表2 SOBS回收基本信息表
Table 2 Basic information of the recovered SOBS

图4 SOBS观测期间的典型信号（NS和EW代表水平分量，UD代表垂直分量）<br/>Fig.4 Typical signals during SOBS observation (NS and EW represent the horizontal components,UD represents the vertical component)

图4 SOBS观测期间的典型信号（NS和EW代表水平分量，UD代表垂直分量）
Fig.4 Typical signals during SOBS observation (NS and EW represent the horizontal components,UD represents the vertical component)

图5 海底台基噪声功率谱（NS和EW代表水平分量，UD代表垂直分量）<br/>Fig.5 Noise power spectrum of the station on ocean bottom （NS and EW represent the horizontal components,UD represents the vertical component）

图5 海底台基噪声功率谱（NS和EW代表水平分量，UD代表垂直分量）
Fig.5 Noise power spectrum of the station on ocean bottom （NS and EW represent the horizontal components,UD represents the vertical component）

图6 SOBS和大连台信号对比<br/>Fig.6 Signal comparison of SOBS and Dalian station

图6 SOBS和大连台信号对比
Fig.6 Signal comparison of SOBS and Dalian station

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备注

引言

1 仪器及设计原理

2 资料采集

3 观测数据的质量分析

4 结语

期刊信息