| Summary: | There were multiple moderate-strong earthquakes occurred successively within an area of 300 km around the Aksu fault hydrogen observation point during the period from November 2013 to December 2021, for which 8 short-term precursory anomalies of fault hydrogen concentrations appeared in different degrees change. By analyzing and summarizing the abnormal characteristics, the obtained earthquake cases are divided into three different types: fluctuation type, sudden rise type and sudden rise recovery type. Using the scoring method of R value to evaluate the forecasting effectiveness of the Aksu fault hydrogen observation, R value score of 0.462 has been obtained for earthquakes with magnitude above 5 within the range of 300 km, and the forecasting effectiveness is good.
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