Magnetic 'blip' brings immediate results.

There was no unusual WSPR spot activity at 14MHz overnight.  

But there was a very brief period, spanning just over half an hour, where the local field was slightly disturbed as part of normal diurnal changes.  Incidentally, a good article about the field is found here.

Being only around 22UT, I was watching the screen and could see the field change, and an otherwise DX-dead 14MHz band respond by producing a small number of RX spots of US stations from 21:52UT until 22:28UT.  My 1W signal also made jumps as far as VP8A at the same time: