Southern Brazil PU3RRW 10m WSPR

PU3RRW (10652km) was spotted 3 times (so far) this evening. This station in GF38tf  is about as far south as one can get in Brazil and was a massive +9dB S/N for 5W on WSPR at times.

I wonder if TEP  propagation was helping to give signals this strong on 10m.