REYKJAVIK: A powerful earthquake on Wednesday rocked southwestern Iceland, including the capital Reykjavik, triggering increased volcanic activity but causing no serious injuries or damage, authorities said.

The epicentre of the quake was located near Mount Keilir, a small mountain of 378 metres (1,240 feet) on the Reykjanes peninsula, some 30 kilometres (19 miles) south of Reykjavik, authorities added.