Looked back into the past, did note a short earthbound ejecta on the 18th janurary, The timing seems ok. Could account for the mgnetosphere on the 21st jan.

I say what i see. Check it if you want, cor1 [link to stereo-ssc.nascom.nasa.gov] Right side.

But if you got consistant anomolies, directed proton shot doing the sme thing on at least 3 seperate occasions with no earthbound cme/flare within 4 days prior ill look into them.