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Melatonictoday at 8:00 AM1 replyview on HN

Or influence by the moon just as it pulls on oceans. Lot of liquid magma down there.

Or maybe some once in a rare incident involving coronal mass ejections somehow affecting the core of the planet. Could even be a delayed effect.


Replies

fragmedetoday at 12:06 PM

One of the More out there theories is that some earthquakes are caused by high energy cosmic particles going through the Earth.