The variation of stress in the aquifer inversed is closer to practice by the tidal effect of the water level in a deep well than by the barometric effect.

利用井水位的固体潮效应反演含水层应力变化，比利用气压效应更接近实际情况。

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Still, when the sun lines up perfectly on the opposite side of the Earth from the moon, as it did on January 4, 1912, it increases the tidal effect slightly.

CNN: The sun, the moon and the Titanic

The overall strength of the moon's gravity, as well as its differential (tidal) effect, is greatest when the moon is closest to the Earth, as on January 4, 1912.

CNN: The sun, the moon and the Titanic

Moons that orbit their planet too closely will experience strong tidal heating and a runaway greenhouse effect that would boil away any surface water.

MSN: News editor