The mission of the WDC for Geomagnetism, Kyoto is to provide geomagnetic field data supplied from a worldwide network of magnetic observatories, and the geomagnetic indices (AE index, ASY/SYM index, and Dst index) derived in this data center to researchers specializing mostly in solar terrestrial physics, and geomagnetism, the graduate students majoring in these academic disciplines, and citizens having an interest in those research fields.