十堰市地震台测震系统运行问题及解决措施

受供电和数据传输方式的影响，十堰地震台测震系统数据断记时间较长，数据质量较差。为此，采用3路交流供电自动切换辅助2路直流供电方式，为仪器运行提供稳定的电力供给，并采用一主一备有线光纤传输解决微波单线传输的弊端。为验证解决措施的有效性，选取该台2009—2020年测震记录，统计SEED格式波形记录数据断记时长，结果发现，在2013年进行整改以来，数据断记现象减少，断记时长明显缩短。选取该台2015—2021年测震系统仪器更换以来的数据记录，分析地方震、近震、远震和极远震震相特征，发现该台记录地震波形清晰、可靠。可见，该台数据断记整改措施得到有效检验，测震系统运行质量得到提升，可为国内同类测震台站提供参考。

Discussion on problems and solutions in operation of the observation system at Shiyan Seismic Station

Due to the influence of power supply and data transmission mode, the data of the seismic observation system at Shiyan Seismic Station is broken down for a long time and the data quality is poor. Therefore, 3 phase AC power supply is adopted to automatically switch the auxiliary 2 phase DC power supply mode to provide stable power supply for the operation of the instrument, and one main and one standby wired optical fiber transmission is adopted to solve the disadvantages of microwave single line transmission. In order to verify the effectiveness of the solution measures, the seismic records in SEED format of the station from 2009 to 2020 are selected to count the broken recording time duration. The results show that since the rectification in 2013, the phenomenon of data broken recording has been reduced and the broken recording time has been significantly shortened. Based on the data records of the station since the instrument of the seismic measurement system was replaced from 2015 to 2021, the phase characteristics of local earthquakes, near earthquakes, distant earthquakes, and extreme distant earthquakes are analyzed. It is found that the seismic waveform recorded by the station is clear and reliable. It can be seen that the rectification measures for broken data recording of the station have been effectively tested, and the operation quality of the seismic measurement system has been improved, which can provide a reference for similar domestic seismic stations in China.