Abstract The apparent resistivity imaging at multiparametric geophysical observatory (MPGO), Ouguri Hills, Tezpur was carried out since 31st August, 2016 for fixed interval time of 3 days to investigate precursory signature prior to earthquake events. Anomalies in apparent resistivity prior to earthquake events are observed. The anomalies are not influenced by the rainfall activity in the region during the investigation period. We adopt Weibull distribution technique with observed apparent resistivity data to look for and revalidate the observations. The Weibull parameters, i.e. K and m are estimated to be 0.26 and 1.04, respectively. No precise relation between magnitude and earthquake precursory time is found. Simultaneously, an attempt has been made to establish a relation between the earthquake magnitude (M) and precursory time (T) and a relation between the earthquake precursory time (T) and distance of the earthquake (Δ) from the observation point. Weibull probability distribution indicate the probability of an earthquake occurrence exceeds the measure up to 80% (9 days) after the precursory signal is observed. A comparison of probability analysis ascertains a mean precursory time and its standard deviation.

中文翻译：

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印度 Tezpur 多参数地球物理观测站附近地震前视电阻率异常前兆时间的 Weibull 分布分析

摘要 自 2016 年 8 月 31 日起，Tezpur Ouguri Hills 多参数地球物理天文台 (MPGO) 进行了视电阻率成像，固定间隔时间为 3 天，以研究地震事件前的前兆特征。观察到地震事件发生前的视电阻率异常。异常不受调查期间该地区降雨活动的影响。我们采用具有观察到的视电阻率数据的威布尔分布技术来寻找和重新验证观察结果。Weibull 参数，即 K 和 m 分别估计为 0.26 和 1.04。没有发现震级和地震前兆时间之间的精确关系。同时地，已尝试建立地震震级（M）与前兆时间（T）之间的关系以及地震前兆时间（T）与地震距观测点的距离（Δ）之间的关系。威布尔概率分布表明，在观测到前兆信号后，地震发生的概率超过测量值高达 80%（9 天）。概率分析的比较确定平均前兆时间及其标准偏差。