环渤海地区断层气CO_2监测网观测结果的初步分析

Analysis on observation results of fault product gas CO_2 monitoring networks around Bohai Sea area

为了进一步强化对环渤海地震重点监视区的短临监测和预报，在分析山东环渤海地区第四系活动断裂分布特征的基础上，１９９８年３月下旬在渤海南岸的潍坊、烟台、威海３地市的１０个县区，沿活动断裂布设了１０个断层气二氧化碳观测点。根据ＣＯ２监测网一年来的观测结果，把这些观测点分为３类，结果表明，断层气ＣＯ２监测网对其３００ Ｋｍ范围内的４级以上地震具有较强的映震能力。

Based on analyzing the distribution of active faults ~around Bohai Sea area in Sandong, the monitoring networks of including ten observation sites along active faults are arranged in ten counties of three cities, such as Weifang, Yamai and Weihai, to strengthen a ability of short - term and impending monition and prediction for the Bohai Sea seismic hazard zone. The observation sites are divided into three of kinds based on the observation results of fault product gas CO2 monitoring networks during one year. The results show that the monitoring networks have a ability to monitor earthquakes with ML.≥4. 0 within 300 km in this area.