Earthquake prediction theory in nutshell

 Nadir is location exactly on opposite side of Globe ,ie 180 degree apart.

 The theory is based on the idea that, like hightides and low tides in the oceans, there occurs hightides and lowtides ,exactly like ocean water,in molten semisolid magma below the crust.

When the tidal pull exceeds the threshold limit and when the pull is acting on the fault lines or plate boundaries, it breaks the thin ( 60 to 100 kms) Earth crust .Hence an earthquake occurs.

If it is right on volcano mouth ,it break open the mouth and the crust and an Eruption occurs.

 Now ,as hightide occurs at both places ( 180 degree apart ,ie both side of globe ,the quake can also occur on both sides ,

That is why Nadir ( opposite side longitude ) is equally prone ,like Zenith side