That's what I think is happening.

Harmonic tremors would surge then stop. I think the lower magma chamber is now putting a lot of pressure on the upper chamber. Enough to crush the magma conduits near the surface.

That's why we saw a spectacular eruption just before silence. The magma that was shallow was blasted out when the deep pressure crushed the shallow rock layer.

A matter of time we'll know. They won't be able to hide the coming land deformation easily unless it's offshore underwater. If she explodes like St Helen's. A side flank explosion for la palma would be under water.