On the plot the boxes show the real time intervals of magnetic conjugations on the background of the simulative geophysical regions in the Spacecraft positions.
Date is shown along the X-axis, the real time: UT or Moscow time (MT = UT + 3h) - along the Y-axis.
The time (with 20-min step) is labelled by the symbol, corresponding to the geophysical region in the Spacecraft position.
See the geophysical region designations and models.