Geomagnetic and ionospheric disturbances associated with mid-latitude auroras on March 17, 2015

We carried out comparative analysis of the ionospheric, optic and geomagnetic disturbances observed during night hours of the main phase of the 17–18 March magnetic storm in the East Asian sector. It has been revealed that synchronous peaks of 557.7 and 630.0 nm emission intensity were associated with substorm-like enhancements of the westward electrojet. The strongest two peaks were observed during the shift of electrojet center to the corrected geomagnetic latitude φ’ ~ 55° N.