Attached my plot of few VLF stations and noise floor [SpectrumLab noise_n(16000,23990)]. SID started about 29000 seconds after midnight. Sorry for the very unusual time stamp but the recording system
Thanks Stefan - Yes interesting Flare - I changed the Alaska gains and saw that DHO38 popped out of the noise for 30 mins after the flare hit too - looking at the paths you can "mostly" see the ones