地震前兆 (earthquake precursors)，是指地震前出现并预示地震将要发生的现象。地震前兆通常是从震前异常现象中去寻找和筛选，这是探索地震前兆的经验途径。
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strong earthquake precursors 强震前兆
features of earthquake precursors 震兆特征
Earthquake precursors and prediction 地震前兆预测与预测
The mechanism of many earthquake precursors is related to fluids deep inside the Earth.
许多地震前兆的机理与地球深部流体相关。
The existence of hard inclusion may cause a great influence to variations of earthquake precursors.
硬包体的存在对地震前兆变化会产生显著影响。
The approach of the above evaluation method can also be applied to other non-earthquake precursors.
该方法及思路也可为其他非地震前兆的可信度评估所借鉴。
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