i would just thought its random chance cuz it looks so complicated to guess,
but scientists already know/theorize from evidence on hand, why there were no tsunami this time, not just the magnitude but other thingys; there is
the technical size/analysis to all the peculiarities of mass & momentum:
I'm sure someone can correct me if I'm way off...but I thought the difference between a Tsunami and not having one is whether there is a major
up/down shift in the Ocean floor that displaces the column of water?
Your correct. These quakes were strike slip quakes which means they were moving side to side from stress on the plate. Now the quakes in the
subduction zones where the plate is moving under cause more thrust quakes that force the plate to snap back up during a large quake causing an updraft
in the water and producing a tsunami.
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