  While the Sun is generally more eruptive during its maximum and declining
phases, observational evidence shows certain cases of powerful solar eruptions
during the quiet phase of the solar activity. Occurring in the weak Solar Cycle
14 just after its minimum, the extreme space weather event in 1903 October --
November was one of these cases. Here, we reconstruct the time series of
geomagnetic activity based on contemporary observational records. With the
mid-latitude magnetograms, the 1903 magnetic storm is thought to be caused by a
fast coronal mass ejection (~1500 km/s) and is regarded as an intense event
with an estimated minimum Dst' of ~-513 nT The reconstructed time series has
been compared with the equatorward extension of auroral oval (~44.1{\deg} in
invariant latitude) and the time series of telegraphic disturbances. This case
study shows that potential threats posed by extreme space weather events exist
even during weak solar cycles or near their minima.
