Yep. Project Plowshares.....drill down 1000m and detonate a 100kt nuclear weapon and you get this:
Any chance of it collapsing all the foundations in Gaza into one big hole?
I don't think that will happen. Many of the tunnels go down so deep that foundations are not affected. Some can be hundreds of feet down.
I read that the IDF has been pumping colored smoke into tunnel openings, and watching for the colored smoke rising from buildings that have tunnel exits within. The IDF then calls in bomb strikes on those buildings which collapse the tunnels underneath. The IDF knows what they're doing.
Yep. Project Plowshares.....drill down 1000m and detonate a 100kt nuclear weapon and you get this: