Explosion-Crater-Physic don't lie !
A 100m-crater needs 4400 - 13500 t TNT (not 21 t-TNT as official) (formula/reference see below)
And this needs some 100 containers chemical explosives OR a small nuclear device.
New HiRes-photo overlayed in Google Earth
News about nuclear experts (reuters and MSM mainstreammedia) disappear
First Reuters-News: http://www.reuters.com/article/2015/08/14/us-china-blast-idUSKCN0QH2B220150814
version 1 (of 16) 2015-08-13 8:50pm : https://web.archive.org/web/20150814012341/http://...
version 1 Thu Aug 13, 2015 8:50pm EDT
A team from the International Atomic Energy Agency's Beijing environmental emergency response center, as well as 214 Chinese military nuclear and biochemical materials specialists, had gone to Tianjin, the official Xinhua news agency said.
version 2 5 hours later: Fri Aug 14, 2015 2:09am EDT
Chemical safety experts said calcium carbide reacts with water to create acetylene, a highly explosive gas. An explosion could be caused if fire fighters sprayed the calcium carbide with water, they said.
Reuters-article in web-archiv:
Result:: itv.com deletes article
2015-08-14 original http://www.itv.com/news/story/2015-08-14/nuclear-experts-at-scene-of-huge-china-explosions/
(now redirected )
2015-08-16 replaced by http://www.itv.com/news/story/2015-08-16/dozens-of...
changed to 2015-08-17 http://news.sky.com/story/1535420/firefighter-pull...
China Supercomputer Center Tianjin only 850 m away!
Physic laws are also valid in China! Crater from 2. explosion (about 92x100m ) needs min. 4400 t TNT:
Formula for D=diameter vs. W=energy
above ground-explosion : D1 [m] = 0.42W[Kg]^(1/3)
or W[t-TNT] = ( D[m] / 4.2 ) ^ 3
center at/below ground : D2 [m] = 0.61W[Kg]^(1/3) or W[t-TNT] = ( D[m] / 6.1 ) ^ 3
>> D1 = 0.42 * 21000[kg]^(1/3) = 11.6 m
>> W1 = (100[m]/4.2)^3 = 13500 t-TNT
>> W2 = (100[m]/6.1)^3 = 4405 t-TNT
Mecánica Computacional Vol. XXII
M. B. Rosales, V. H. Cortínez y D. V. Bambill (Editores)
Bahía Blanca, Argentina, Noviembre 2003.
CRATERS PRODUCED BY EXPLOSIONS ON THE SOIL SURFACE
Explosion of 21 t TNT ON ground would result in 11.6 m crater!
More: Chinese Harbour Nuked.pdf (2MB), https://anonfiles.com/file/511a852636aa4459039fcbc...