临潼地震台氢气异常与地震对应关系研究

RELATIONSHIP OF THE H₂ GAS ANOMALY WITH EARTHQUAKES IN LINTONG OBSERVATORY

摘要: 研究了1993年8月以来, 临潼台氢气异常与远场M_S≥5.0、近场M_L≥4.0地震的对应关系。结果表明, 临潼台氢气异常的映震范围涵盖了从青藏高原北部到鄂尔多斯块体周边的大部分地区, 主要与青藏高原北部地区M_S≥5.0地震有较好的相关性, 特别是在氢气背景值低于仪器检测限的情况下效果更好。应用这种相关性, 对判定整个青藏高原北部地区的短临地震活动情况, 具有一定的指导意义。

Abstract: The relation of hydrogen gas anomaly in Lintong observatory with M_S≥5.0 far-field and M_L≥4.0 near-field earthquakes since Aug., 1993 is studied.The results show that the range of hydrogen gas anomaly to reflect earthquake covers the most part from North Qinghai-Tibet plateau to Ordos block.These anomalies mainly related to the M_S≥5.0 earthquakes in north Qinghai-Tibet plateau, especially when the background value of hydrogen gas is lower than the detection limit of the instrument.