It looks like you're using an Ad Blocker.
Please white-list or disable AboveTopSecret.com in your ad-blocking tool.
Thank you.
Some features of ATS will be disabled while you continue to use an ad-blocker.
www.pentaxforums.com/gallery/photo-fastest-tunnel-borer-world-18 988/
The largest tunnel boring machine in the world or TBM is the German built
S-373 Herrenknecht double shield and it is owned by the Spanish Govt. It was dismantled from its last project in the Asturias and 500 trucks transported it to Sorbas for reassembly and now it’s ready to start work. The TBM is a mile long and it is AWESOME. The TBM currently holds the world speed record for tunnelling as it managed up to tunnel up to 105M a day on the Madrid to Valencia AVE line in 2007/8.
Originally posted by -elmo-
To the video in the op.
Just heard the exact same noise followed by 4 flashes of light.
I'm in auckland, New Zealand.
it happened at approximately 1:30am.
Any other kiwi members heard it?
Have camera ready in case it happens again.
Originally posted by Sky watcher
Originally posted by -elmo-
To the video in the op.
Just heard the exact same noise followed by 4 flashes of light.
I'm in auckland, New Zealand.
it happened at approximately 1:30am.
Any other kiwi members heard it?
Have camera ready in case it happens again.
Do you have any Cave complexes near you? That would be the source of the noise and whats actually causing it? I don't know.
Originally posted by ferdberffle
reply to post by discl0sur3
C'mon people, that was a jet engine test! Nothing exotic, strange or scary about it. The military and commercial repair facilities perform these all of the time. It may be unusual in that area, but overall it's nothing new or strange.
A strange effect was long noticed in the audibility of very large explosions and similar noises. The sound is observed in a region surrounding the source, perhaps extending 50 km or more. Then there is a zone of silence, but at several hundred kilometres, the sound, or at least its lower-frequency components, is sometimes again heard, and with extra delay. Guns on the continent were heard in England, for example. In the 1930's, this anomalous propagation was finally recognized as the effect of temperatures comparable to those on the ground, far above the stratosphere. The sound was reflected by these hot layers and again bent downward towards the earth. Sound from sources like jet aircraft or rockets can also be trapped as in a waveguide in the stratosphere, with higher temperatures both above and below, and can be detected thousands of miles from its source by a receiver in the stratosphere.