"donutbandit" wrote in message
...
"Thierry" Thierry, see http://www.astrosurf.com/lombry/ wrote in
:

Be complete: While LF, MF and HF bands experiment blackouts, the
increasing of the electronic density between 50-90 km aloft at daytime
(due to solar flares) enhances VLF communications during a few days.

I've seen reports in ham related groups of good propagation on LF as well
as 10 meters lately.

What happens sometimes is that during blackouts in Scandinavia regions for
example (due to solar flare, etc),these hams can experiment for a few hours
some exeptional openings to far DX, mainly trans-equatorial (i.e. LA to
CX/PY or to pacific) due to an increasing of electrons density in D-Region.
But only inhabitants of polar regions (over 60° N/S) can be the witnesses of
these occurrences.
AAVSO is monitoring theses openings

Thierry
ON4SKY