Did my 1mW ERP reach Moscow on 500kHz last night??

This evening, Andrey RN3AGC sent me an intriguing screenshot taken from his PC in Moscow 2433kms away from here. It shows a very weak trace on the screen at the frequency which only G3XBM was operating last night. It is just possible this was my 1mW ERP signal. If so, it was too weak for the WSPR software to decode. You have to look very hard to discern the trace.

Hello Roger,

Probably? :)
Yesterday only you on this frequency worked.

73 Andrey