Solar alert

Issued on 2022 Apr 13 0914 UTC

The in situ observations show that the sudden icrease of the interplanetary magnetic filed magnitude, the solar wind speed, density and temperature at about 10:20 UT on April 12 was the shock followed by the ICME. The solar origin of this ICME is somewhat unclear and two possible candidates are the CME observed on April 07, and the CME on April 09. However, the presently observed solar wind velocity indicates that the CME probably departed the Sun on April 09, and that it could have been associated with the large filament eruption from the southwest quadrant of the Sun. The Bz component of the interplanetary magnetic field persist to be negative, down to about -6 nT, during last seven hours, while the solar wind velocity has the value of about 470 km/s. Presently the geomagnetic conditions are quiet to unsettled but the isolated intervals of active conditions are possible in the coming hours.

Reference for this alert

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