Nostradamus and the tomb of Peter

I see the Vatican is planning on opening the tomb they believe to be that of Peter.
century 6
quatrain 66
At the foundation of the new sect,
The bones of the great Roman will be found,
A sepulcher covered by marble will appear,
Earth to quake in April poorly buried.
Have no idea about earthquakes but I got a whiz out of the century/quatrain numbers and the ref.to the tomb.
If they open it in any April I will chuckle mightily.