AR1748 released an X1.2 solar flare on Tuesday, the weakest flare this spot has produced. Source
Space weather scientists have been intrigued by a "new" sunspot known as AR1748. This sunspot has released not one, not two, not even three, but four X-class solar flares in a three day period from Sunday to Tuesday. Not only is this an unusual amount of flares in an unusually short period of time, X-class solar flares are the strongest type of flare that the Sun can experience. This sunspot should be facing the Earth sometime this weekend, so we might be see some aurorae in the near future if it fires off any coronal mass ejections (CMEs).
My phone alerts me to the Sun's activities, and I remember that it kept going off over and over during the weekend and into early week. This sunspot certainly does keep one on one's toes.
For more information, check out this article.