VLF Chart Recording at 40khz

Whats it all about how does it work / Back to gdobsy weather page

The most recent chart:
Starts 04/20/2018 02:40:00 UT
Ends 04/20/2018 03:40:00 UT

Total observation:
Starts 04/20/2018 00:00:06 UT
Ends 04/20/2018 03:40:00 UT