Correlation e3-file vs bb3f-files: magnetic field at Earth
The graph is updated hourly, most recently at (insert system time here).
The theoretical model forecasts several days past this time into the future.
The model is based on a tomographic least-squares fit of the latest IPS velocity
data received from STELab (Nagoya, Japan), and is updated every time new data
arrive (most recently at (insert t3d_time here)).