I hope I may quote you without running into strictures.Well I am probably going to move on from this thread unless something new and exciting comes up.
The thread now reminds me of a dunken man who was hanging from a live cable when something earthed him. He was fried in an instant and his body fell leaving his empty coat on the wire, flapping in a the wind. making a pale parody of the man's antics before he was shaheedized.

Post I was making this morning became shaheed either through the kindness of some mod or my own failure to hit "post".
But to summarize yet again:
S1 and S2 may have been at different depths, but were within about a km of each other. The village and the Logistics Base were about 4 km away. S1+S2 were triggered simultaneously. The shaking caused visible damage. Had the yields of either S1 or S2 been substantially greater than what occurred, the damage would have been extremely severe, and the shaking would very probably have reached levels where multiple deaths have occurred with earthquakes in Italy and Australia in recent times.
The POK-2 team had 24 years to figure out exactly what input at S1+S2 could be tolerated without major damage at Khetolai. They had data from 1974, simulations to match those data, ground instrumentation tests, and more modeling.
Children at Khetolai were outdoors at test time, in order to avoid even the minimal risk of a schoolhouse collapse (which occurred in Italy due to construction flaws in a comparable earthquake but killed some 30 kids just the same). Khetolai is not even over the horizon from S1-S2 because typically one can see some 4 miles to the horizon from the height of a tall person. So any radioactive venting at S1-S2 would have caused serious radiation injury to the kids. The designers were not going to risk that in any way.
So it is very clear that the tests were constrained by this very simple and visible criterion, as the test designers, the test coordinator K.S. Santanam, and all the BARC and DRDO ppl who spoke in May 1998 made very clear. Given the pictures and reality of some damage, it is beyond doubt then that
Yield from S1+S2 was NOT LESS THAN Design Yield from S1+S2.
No amount of guessed data however technically deep, can achieve the simple closed-form proof that the above achieves. It does not do any good for people to ignore it, call it a "red herring" (I guess there's a preponderence of those in the Thar desert, as much as camels in Britain), insist on Immunity From Posts Being Rebutted, etc. etc. etc.
The simple truth survives after some 1800 posts, like an A-Frame and Winch surviving the desert hot air, heaving ground and flying debris at Ground Zero. Satyam Eva Jayate.
Thanks, shiv, for patiently digging out the truth and batting back the endless waves of convoluted techno-babble based on 99% precise, 100% uncertain "data" with simple logic without losing your sense of humor. Hard act to follow!