18,000km opening on 50 MHz between Europe and Australia - 7th July 2021

Wed 7th July 2021: There was yet another opening on the 50 MHz band between Australia and Europe on the 7th of July except this one seemed a bit more extensive. Looking at the PSK Reporter website, I found at least 15 Australian stations active for the opening.

These are the spots from the DX Cluster and they seem to indicate that as per usual, all of the activity was on the FT8 digital mode.

Spotter Freq. DX Time Info Country

VK3OT-@ 50315.0 G3NSM 06:30 07 Jul decoded on ft8n England
VK3OT-@ 50314.0 UR0MC 06:13 07 Jul CQ VK FT8 Ukraine
VK3OT-@ 50313.0 UT7QF 06:11 07 Jul TNX QSO 73 Ukraine

SP6NVN 50313.0 VK5PJ 07:17 07 Jul -23 db hrd Australia
S57RR-@ 50323.5 VK3ZL 06:47 07 Jul FT8 -19dB JN65um<>QF22 TU! Australia
OH7KM 50313.0 VK2OO 05:57 07 Jul cq -20 Australia 

DG1VL 50313.0 VK4HJ 05:22 07 Jul FT8 -13dB 469Hz Australia
S57RR-@ 50315.3 VK2EFM 05:20 07 Jul FT8 -14dB JN65um<>QF56 CQ Australia

The longest path I could find was 18,009kms between VK2EFM near Sydney and EA1YV in the NW of Spain. That is only 2000kms short of the maximum distance without going to the long path (20,000kms+).

Q. Are there more 50 MHz openings to Australia from Europe??? ...There does seem to be an extraordinary number of openings from Australia to Europe at the moment on the 50 MHz band. This is after all a VHF band, it's not HF.

Is this year exceptional? 

Are there a lot more openings than usual?

Were these 50MHz openings happening in 2020 and I just didn't notice them?

I reported on one opening in July of 2019 and that seemed to me at the time to be very unusual. I think if I had noticed all of these openings in 2020, I would have written about it. If it was say from the SE of Australia to the Ukraine then I may not have said anything but any opening on 50 MHz from Australia to Western Europe is always special.

* * * 

FT8 reports on 50 MHz between Australia and Europe from the PSK Reporter website from the 7th of July 2021 are shown below...

Remarkable 13,000 km opening on 6-metres between Australia and South America - 12th Dec 2020

At the moment, our colleagues in the southern hemisphere are in the middle of their summer Sporadic-E season and there are of course plenty of openings on the VHF bands.

On the 12th of December 2020, there was a remarkable opening on 6-metres between Australia and South America. For example, the map below from the PSK Reporter website shows the sent/received reports for VK3BD in the SE of Australia.

What is truly remarkable about this is the sheer distance and the path of the signals.

For many, the distance between the stations in Australia and the stations in Brazil, Bolivia and Paraguay was in excess of 13,000 kms! 

To put that into perspective for European readers, the distance from say the UK to Japan is about 9500 kms. Every year, there seems to be multi-hop Sporadic-E openings from Europe to Japan on 50 MHz which cause a lot of excitement. This opening from Australia to South America was significantly further.

The second interesting point was the path. In some instances, the Great Circle path crossed part of Antarctica with the most southerly path going as far as 78 degrees south. Again to put that into perspective for European readers, 78 degrees is about as far north as say the island of Svalbard to the north of Norway.

Far northern or far southern latitudes are not areas normally associated with Sporadic-E.

To get a view from the South American side, I took a screenshot of the map for CP6UA in Bolivia.

As the map shows, the stations in New Zealand (ZL) were also getting in on the action and the distance to them was an impressive 11,000 kms or so.

Mode of propagation???... The million dollar question. I presume it was multi-hop Sporadic-E but it was a lot of hops! One of the longest paths that I saw was between VK5BC and PT9FD, a distance of 13,530 kms.

VK5BC PT9FD 6m JT65 13530 km 22:17:50

The maximum distance for one Sporadic-E hop is about 2300 kms. Was it six hops of 2255 kms? Seven hops of 1933 kms? If it was multi-hop Sporadic-E then a lot of patches of Sporadic-E had to line up in a row and at the correct distance for it to work.

Addendum... Someone suggested that Polar Mesospheric Summer Echos (PMSE) with electrons gathering around ice crystals may have been responsible for this opening. I include it here for reference reference.

Contacts... I'm sure many contacts were made but the purpose of this post is just to highlight the fact that the opening occurred.

Looking at the PSK Reporter website, these were the stations that I saw listed...

Australia...

VK1JA

VK2ZQ

VK3OT, VK3BD, VK3DUT, VK3OER, VK3WE, VK3KU

VK5PW, VK5BC, VK5PJ, VK5RM

Brazil - PY5HOT, PT9FT, PY5KD, PY5EK

Paraguay - ZP5DPC, ZP4KFZ

Bolivia - CP6UA

Argentina - LW2DAF, LU3CQ, LU9DO

Chile - CE3SX, CA3SOC, XQ3MCC

Uruguay - CX6DRA

DX-Cluster... Here are a selection of spots from the DX-Cluster...

PT9FD 50276.0 VK3OT 22:19 12 Dec JT65A GG27OR <> QF12ag TU 73 Australia

PT9FD 50276.0 VK5BC 22:00 12 Dec JT65A gg27or PF95jj tks 73 Australia

CE3SX 50276.0 VK5PJ 22:00 12 Dec FF46<>PF95MK TU Peter Australia

CP6UA 50276.0 VK3DUT 21:35 12 Dec Thanks New One Norm. 73 Australia

PY4AQA 50276.0 VK4QG 22:18 10 Dec JT65A -24 dB Australia

VK3OER 50276 PT9FD 23:24 12 Dec 20 JT65 -25 CQ Brazil

VK3OT-@ 50277.3 PT9FD 22:18 12 Dec 20 QF12ag GG27 jt65 qso 73 Brazil

VK3OT-@ 50277 PT9FD 22:14 12 Dec 20 cq pt9fd gg27 jt65a -19 Brazil

VK3OT-@ 50277 PY5HOT 21:42 12 Dec 20 cq gg46 jt65a Brazil

VK3OT-@ 50279 PT9FD 21:34 12 Dec 20 jt65 cq -23 Brazil

VK3OT-@ 50277 ZP4KFX 20:55 12 Dec 20 wow thanks JT65A Paraguay

VK3OT-@ 50277 ZP5DBC 20:50 12 Dec 20 JT65A thanks -19 Paraguay

I also kept a record for some of the Australian stations logs of the signals that they heard from South America for this opening. PSK Reporter normally wipes all records after 24 hours so it's nice to have some record of the opening. See below...