It looks like you're using an Ad Blocker.
Please white-list or disable AboveTopSecret.com in your ad-blocking tool.
Some features of ATS will be disabled while you continue to use an ad-blocker.
M 3.4 Mine Collapse - 11km NNW of Richlands, Virginia
2016-07-18 09:53:39 (UTC)
originally posted by: TrueAmerican
Wow- ok. Now that we know it was an explosion, I went and pulled raw seismic data from 5 stations, and was able to generate both waveforms and spectro of the boom:
For each station, the waveform is on top with its associated spectrograph below it.
Now what gets me about this is that the USGS did not immediately report this as an explosion. You see, they are supposed to be able to tell from close analysis of the waveform data. It's kind of scary to think, actually, that a massive explosion could go off and the USGS would report it as an earthquake initially. If you look closely at the waveforms, there are differences between these and a typical earthquake. The USGS is supposed to spot these differences and recognize them. Our national security could depend on it.
The waveform from station 656A is the clear giveaway that should have been recognized as an explosion. I know this signature from studying nuclear blast signatures. The waveform data from that last North Korea nuke test explosion looks strikingly similar, for example.