15,000km+ opening on 50 MHz between SE Australia and Europe - 14th July 2021

Wednesday 14th July 2021: Openings on the 50 MHz between Europe and Australia near the bottom of the solar cycle are supposed to be 'special'... i.e. a rare occurrence... something that doesn't happen very often.

And yet the 14th of July saw yet another opening. I'm in two minds at this stage if I should be even recording these events are they seem so common? I need these openings to stop soon so I can take a break! 😂😂

The map above shows the extent of the opening from VK2XN in New South Wales in the SE of Australia. You'll notice that opening on the 14th seems to be mainly to the south-east of Europe. The longest path on FT8 was to IS0AWZ in Sardinia at 16,334kms.

I found the map for VK2OO near Sydney to be of interest...

Notice how the 50 MHz went up as far as Finland. Also notice how VK2OO also had what seemed to be a big opening to Japan at about 04:00 UTC (~8000kms) and this was followed later by the opening to Europe around 07:00 UTC. It has all the appearance of TEP (Trans-Equatorial Propagation).

As far as I can tell, the opening from Europe seemed to be largely confined to VK2 and VK3 stations in New South Wales and Victoria in the SE of Australia.

These are the spots from the DX Cluster... 

VK2WJ 50313.0 UR0MC 07:36 14 Jul FT8 QF56ss -> KN99ea Ukraine

VK3OER 50313.0 LY2IJ 07:20 14 Jul 071830 -10 0.2 2342 ~ CQ DX L Lithuania

LY2IJ 50313.0 VK3OER 07:17 14 Jul TU QSO! Australia

DO5OT 50313.0 VK3DUT 07:13 14 Jul JO62WL<ES>QF32VF ft8 TNX new o Australia

LY2IJ 50313.0 VK3ZYC 07:04 14 Jul TU QSO! QF31<>KO25 Australia

IK6DTB 50313.0 VK2XN 06:35 14 Jul TNX 73 Australia

SV2JAO 50313.0 VK2XN 06:12 14 Jul kn10<es>qf59 Australia

VK3ZAZ 50313.0 S57RR 05:49 14 Jul FT8, CQ vk Slovenia

VK3OT-@ 50313.5 S57RR 05:46 14 Jul into vk3 Slovenia

VK3OER 50313.0 4O6AH 05:31 14 Jul 052700 -14 0.2 922 ~ CQ DX 4 Montenegro

VK3DUT-@ 50313.0 406AH 05:31 14 Jul -17 rx only Montenegro

VK3DUT-@ 50313.0 I6WJB 05:30 14 Jul -18 rx only Italy

SV1DH 50313.0 VK3BD 05:30 14 Jul CQ -16db and gone Australia

FT8 paths for Australian stations on 50 MHz to Europe are shown below...

Weak opening from Europe to Australia on 50 MHz - 29th May 2021

Sat 29th May 2021: It looks as if there was a weak opening from Europe to Australia on the 50 MHz with a few weak FT8 signals making it through.

Txmtr Rcvr Band Mode Distance Time (UTC)

DF5VAE VK4HJ 6m FT8 15477 km 06:05:29

UT7UV VK4HJ 6m FT8 14545 km 04:18:44

SP3MM VK4CZ 6m FT8 15564 km 07:10:14
VK4CZ UT2XQ 6m FT8 14683 km 06:59:59

SP4K VK3OER 6m FT8 15383 km 05:17:41

It looks as if there was a successful FT8 contact between VK4CZ in Australia and SP3MM in Poland, a distance of about 15564kms. The signals seem to have been quiet weak and were in the range of -16dB to -20dB which is below what is audible to the human ear i.e. a cw contact would not have been possible.

As for the propagation mode, it seems likely it was multi-hop Sporadic-E with possibly eight hops required. I say 'likely' as I sometimes wonder what are the chances of getting eight Sp-E hops in a row at 50 MHz.

We still have all of June to go yet so there could be more openings on 50 MHz from Europe to Australia.

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...