The 15 mm Time-Bomb: Why the Himalayas are Packing a Continent-Sized Punch: Santa skips structural clearances to build a sleek concrete mall, joking that 15mm of annual tectonic movement is harmless. Banta drops a brutal seismic diagnostic based on the 2015 Gorkha and 1950 Assam great quakes, proving how locked strain along the Main Himalayan Thrust transforms non-compliant buildings into concrete traps.