I am very pleasantly surprised to hear up to strength S4 pure tone whistlers occurring this morning. Right now it's 5:45 AM MST (Sunday). I'm headed to a...
806
vlfkorgan1
Sep 1, 2002 9:21 pm
Hi all, Here are a few comments from an e-mail I sent earlier this morning that the group may be interested in reading as well: I was very seriously thinking...
807
Dave
dave@...
Sep 1, 2002 11:24 pm
Thanks for the excellent report and observation Shawn, it is quite difficult to predict exactly when whistlers can be heard. I think that with the increasing...
808
vlfkorgan1
Sep 2, 2002 2:48 am
Hi all, Just in case anyone was wondering what the sferics I heard sounded like, they had a hollow, crunchy sound to them. It sounded as if the sferics were...
809
Miguel V.B.
miguelvb
Sep 2, 2002 8:37 pm
Hi all, I am new in this group and also in natural radio listening. I have just built a bbb-4 receiver and I was wondering about wich "home built" receiver is...
810
Trond Jacobsen
trond.jacobsen@...
Sep 2, 2002 10:18 pm
Hola Miguel ¿ Como estas ? The BBB4 is actually one of the better designs around. On the web you will find several designs and schematics for natural radio...
811
Essaywrite@...
Sep 3, 2002 1:45 pm
In a message dated 9/2/2002 5:19:44 PM Central Daylight Time, ... [Non-text portions of this message have been removed]...
812
Peter.Schmalkoke@...
Sep 3, 2002 5:20 pm
... How do I know the polarity and intensity of the IMF? Is there any continuous data source available on the internet? I'd like to perform some research on...
813
vlfkorgan1
Sep 4, 2002 6:47 am
Hi Peter & Group, Here are the four main web pages I use to watch the IMF (also called Bz). 1.) http://www.spaceweather.com/ 2.) http://www.sec.noaa.gov/SWN/ ...
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Trond Jacobsen
trond.jacobsen@...
Sep 4, 2002 8:35 am
Hello group ... Koemel, Walton C. 1996. Extremely low frequency radio emissions in bat caves. Journal of Cave and Karst Studies. 58(1): 35-37. Bats produce...
815
Doug Sutherland
evokedpotent...
Sep 4, 2002 2:49 pm
Trond, Wow, this is very cool! Most people listen to bats at the high end, in the ultrasonic. I have a heterodyning bat detector. It has a dial for tuning in...
816
Doug Sutherland
evokedpotent...
Sep 4, 2002 2:50 pm
Trond, Wow, this is very cool! Most people listen to bats at the high end, in the ultrasonic. I have a heterodyning bat detector. It has a dial for tuning in...
817
charlee rat
charleerat
Sep 4, 2002 3:48 pm
Hi, Group. I admit to being an unabashed shill when I like something, like my favorite restaurant downtown. in this case, I am referring to the North American...
818
Jim
driggers@...
Sep 4, 2002 7:19 pm
How's this for a bat cave?! http://www.austin360.com/events/special/bats.html jd ... From: "Doug Sutherland" <wearable@...> To:...
819
Peter.Schmalkoke@...
Sep 5, 2002 7:46 pm
Hi all, in case someone is also searching for archived data on Bz then have a look at http://www.srl.caltech.edu/ACE/ASC/browse/view_browse_data.html Peter...
820
David VanHorn
dvanhorn2001
Sep 5, 2002 8:12 pm
... I think someone's confusing audio signals with RF signals. I can't imagine how a bat would radiate at those low frequencies in the EM spectrum. Still, you...
821
Trond Jacobsen
trond.jacobsen@...
Sep 5, 2002 8:53 pm
Hello David and VLF group My first thinking was that the supposed bat ELF / VLF signal, was created by an electrostatic effect, much similar to the signals...
822
Jim
driggers@...
Sep 5, 2002 10:13 pm
When I first built my BBB-4, I had it stuck to a PVC pipe stuck into the ground in the front yard. The metal enclosure was grounded and the output was going...
823
Peter.Schmalkoke@...
Sep 5, 2002 10:19 pm
Hello Trond and group ... Some ideas: Let there be electric charge on the bat's flapping wings and you'll find pretty low frequency electric waves. Whilst my...
824
Eric Vogel
evogel99
Sep 6, 2002 2:06 am
Makes sense to me. If the cave is especially humid, wouldn't that attenuate this kind of signal quickly? ... Eric Vogel http://www.flash.net/~evogel/...
825
David VanHorn
dvanhorn2001
Sep 6, 2002 2:15 am
... High humidity precludes static charges from forming, to a very large degree....
826
Peter.Schmalkoke@...
Sep 6, 2002 5:17 am
... The existence of thunderstorm clouds tells me that there must be mechanism of separating electric charge even in a humid environment. This must be a...
827
Doug Sutherland
evokedpotent...
Sep 6, 2002 5:22 am
Well, the other thing is ... that the bats don't do much in the cave! They go there to roost for the winter. They curl up into a little ball and slow their...
828
David VanHorn
dvanhorn2001
Sep 6, 2002 5:35 am
... This happens in a part of the cloud where the water vapour is frozen. Humidity is actually very low. See Martin Uman's books on lightning....
829
vlfkorgan1
Sep 6, 2002 5:08 pm
This morning there were fantastic sounding whistlers occurring in Colorado. Actually, whistlers have been occurring for the past several days (since Tuesday)...
830
Dave
dave@...
Sep 7, 2002 10:09 am
Hi guys, Anyone have any info at all on the Russian 'weather ioniser', supposedly used in the last couple of days to help clear Moscow fog..??? Dave The...
831
Percy Jones
percy.jones2@...
Sep 7, 2002 6:54 pm
A severe magnetic storm started in the past couple of hours (Saturday /1800 utc). Lots of flutter on several signals on 20 metres and it's still the middle of...
832
Gallagher, Dennis
dennis.gallagher@...
Sep 8, 2002 2:14 pm
Only what appeared in the local paper, which showed a picture of a 1 meter square contraption that is suppose to ionize oxygen molecules in the air and ...
833
Dave
dave@...
Sep 8, 2002 3:58 pm
Thanks Dennis.. Dave ... From: "Gallagher, Dennis" <dennis.gallagher@...> To: <VLF_Group@yahoogroups.com> Sent: Sunday, September 08, 2002 4:14 PM ...
834
vlfkorgan1
Sep 8, 2002 8:11 pm
Whistlers are still flying here in Colorado. Saturday morning, I monitored at the house close to sunrise and heard a dozen S3 whistlers in about an hour's...
