I read that a lot of people with (smaller) UPS connected to the grid went totally mad, started clicking while connected to the grid.
Just wondering if someone saw some anomalies at their Sense unit
GPS seemed to have wandered a few more meters than usual:
The A and K indices were crazy high:
https://www.swpc.noaa.gov/products/station-k-and-indices
Some pretty pictures:
List of observations in Finland with descriptions (english):
https://www.taivaanvahti.fi/observations/browse/pics/0/observation_id