Anyway, it proves my point at the beginning of the article i.e., if the North Koreans think they can hide their nuke test by doing an underground test, they'l fail.
About the Indian tests, I do not think it was detected as a nuclear test until much later, when the Indian government annnounced news of the test. What was instantly revealed as data about the nuke test was seismological data, and it is not very easy to tell apart a nuke test from an earth tremor.
But I did think that the failure to detect the Indian tests was a major issue, with several articles posted right here on FR about it. Was it all just 'wink-wink'? If you have any info about it being otherwise, I'd be grateful if you gave me the link/s to it.
It was a huge issue, and rightly so.
Are you suggesting that the U.S. knew beforehand of an Indian nuclear test and looked the other way? If so, it wouldn't suprise me.