2 ms·
Not deep structures, but yes: Project "Faultless": <https://yewtu.be/watch?v=9R2Ok4_Ze3g https://yewtu.be/watch?v=9R2Ok4_Ze3g>. A surface structure mounted o
by dredmorbius 2y ago
Not deep structures, but yes:
Project "Faultless": <https://yewtu.be/watch?v=9R2Ok4_Ze3g https://yewtu.be/watch?v=9R2Ok4_Ze3g>.
A surface structure mounted on springs was directly above the 1 MT shot, which was 3,000 ft (~900m) below the surface.