Staircase was also visible in Alaska and was quite "hot" - 12-14Khz 7 steps 1010-1145Z or so
Date: Wed, 11 Jul 2012 17:05:02 +0100
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[email protected]Subject: Re: LF: Stairway signal now at 10 - 12 h / 9 to 14KHz
Hi Stefan, VLF - the staircase was certainly very strong with me - consistently 30dB above the normal Alpha levels and as strong as any other vlf signal up to 24kHz. The Yahoo VLF Group have also pointed out the unusual signals at about 17.5 kHz around 03.00 UTC. Here's my capture:
https://dl.dropbox.com/u/20838053/test.jpg73 Chris G3WCD
On 11/07/2012 14:51, Stefan Schäfer wrote:
Hello Peter, VLF,
It must have been very strong!
See the peak hold graph on the lower image of http://www.iup.uni-heidelberg.de/schaefer_vlf/DK7FC_VLF_Grabber.html
We've often seen such staircases so far. Sometimes they come down below 9 kHz! But i don't remember to have seen it at such a high S/N.
73, Stefan/DK7FC
Am 11.07.2012 13:51, schrieb PA1SDB, Peter:
Hello VLF, LF
That strange stairway signal is visible again.
It did start 10h10m at least till now (11h45)
