地震中期预报是指对未来一二年内可能发生破坏性地震的地域和强度的预报。
结果表明：绝大部分中强以上地震前2 ~ 3年，在未来震中周围出现较大范围的A值中期异常区域，有很好的预报效果。
The result shows that there are obviously anomaly zones of a value with better prediction ability, in mid term of 2 ~ 3 years before most moderately strong earthquakes.
结果表明，中强地震前1 ~ 3年未来震中周围通常出现明显的W1值中期异常区，该方法具有较好的中期预报效果。
The result shows that the mid-term anomaly zone of W1-value usually appears obviously around the epicenter about 1-3 years before future earthquakes with good prediction effect.
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