"No one dares guess because the Earth's structure isn't uniform. The groundwater level fluctuations might be occurring near the future epicenter, but they also might be occurring quite far away in an area that has no obvious relation to it. This is the main challenge to water-level-based quake prediction."
因為大地的構造和組成並不是均質的，很有可能就在震央附近，但也有機會出現在距它較遠、看似完全不相干的區域，這也是以地下水位探究地震前兆的難處，」賈儀平說。