Topband: Big 160m openings just before K index spikes

John Kaufmann john.kaufmann at
Fri Dec 8 09:45:43 EST 2017

I have also observed enhanced, and sometimes extraordinary, propagation at the onset of disturbed conditions.  A recent notable example was the LP QSO with VK6VZ that I reported last month:  At the time of the QSO, the K index was 6. 

However, disturbed conditions do not always bring enhanced propagation.  There is not a 1:1 correlation in my experience but it's worth checking the band when severe geomagnetic conditions are imminent

73, John W1FV

-----Original Message-----
From: Topband [mailto:topband-bounces at] On Behalf Of George Taft via Topband
Sent: Friday, December 8, 2017 9:29 AM
To: Bob Lawson N6RW; topband at
Subject: Re: Topband: Big 160m openings just before K index spikes

Hi Bob
Do agree with your observations relative to prop enhancement on the upside (beginning) of solar disturbances.  Especially for we northern types close to the northern auroral zone.
I've made some extraordinary contacts in my 35years on topband during these situations.
Now if we could just have one fall on the days that stns like XW4ZW and the BD/BG  stns are active, hi/
73  George  W8UVZ 

    On Wednesday, December 6, 2017 6:09 PM, Bob Lawson N6RW <n6rw at> wrote:

 Is it just my imagination or have others noticed big 160 meter openings
- hours before big K index spikes?

It seems that several times, we have had big openings into Europe and Asia from out here in Arizona and my hopes of having a great opening the next night was ruined by a big geomagnetic storm. Last Saturday morning, the JAs were quite weak here.  Sunday morning, several Asians had good signals.  BD4WN was the loudest I'd ever heard him and JA3YBK was 10 over 9 at sunrise until 15 minutes past sunrise.  He was still solid 45 minutes after sunrise.  Sunday night, I heard the first EU Russian since getting on TB almost three years ago.  I was looking forward to a great post-contest Monday night and bang - the K index jumped up to 4 - just like a few weeks before.  I heard no Asian signals this morning and so far no EU on 160 tonight (Monday night).

73 all de Bob N6RW Prescott AZ

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