About the Hypocentre Location
The hypocenter or hypocentre (literally: 'below the center' from the Greek υπόκεντρον), refers to the site of an earthquake or to that of a nuclear explosion. In the former, it is a synonym of the focus; in the latter, of ground zero.
Extra Info
DAMAGE CAUSED BY THE ATOMIC BOMB EXPLOSION
1. Leveled Area:.................6.7 million square meters
2. Damaged Houses:
Completely burned:.............11,574
Completely Destroyed:.........1,326
Badly Damaged:..................5,509
Total structures damaged:......18,409
3. Casualties: Killed:......73,884
Injured..........................74,909
Total:..........................148,793
(Large numbers of people have died in the following years from the effects of radioactive poisoning)
Source: en.wikipedia.org