Germany's DAX 30 index opened up 97.44 points, or 0.42%, at 23,421.91 on Wednesday, September 17.
The UK's FTSE 100 index opened up 18.31 points, or 0.20%, at 9,213.97 on Wednesday, September 17.
France's CAC 40 index opened up 23.41 points, or 0.30%, at 7,841.63 on Wednesday, September 17.
The STOXX 50 index opened up 17.14 points, or 0.32%, at 5,389.45 points on Wednesday, September 17.
The Spanish IBEX 35 index opened up 32.35 points, or 0.21%, at 15,187.25 points on Wednesday, September 17.
The Italian FTSE MIB index opened up 17.44 points, or 0.04%, at 42,522.00 points on Wednesday, September 17.