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Latest news:

Talang volcano (Sumatra): new eruption since 2 Nov 2010
Saturday, Nov 06, 2010
According to the Jakarta Post, Talang volcano in Western Sumatra started to eruption on 2 Nov 2010. [more]
Talang volcano (Sumatra, Indonesia), activity update: increasing unrest
Thursday, Dec 06, 2007
Talang is becoming more active as judged from visual observations and seismicity . Ash and steam plumes from multiple craters rose to altitudes of 3.1... [more]

Askja volcano

stratovolcano 1516 m (4,974 ft)
Central Iceland, 65.03°N / -16.75°W
Current status: dormant (1 out of 5)
last update: 4 Apr 2012 (increased lake temperatures, caldera lake ice free in winter for first time in many years)
Typical eruption style: explosive + effusive
Askja volcano eruptions: 1797(?), 1875, 1919, 1921, 1922, 1923, 1924(?), 1926, 1938, 1961
Askja is a large basaltic central volcano that forms the Dyngjufjöll massif. It is truncated by three overlapping calderas, the largest of which is 8 km wide and may have been produced primarily from subglacial ring-fracture eruptions rather than by subsidence.

Background:

A major rhyolitic explosive eruption from Dyngjufjöll about 10,000 years ago was in part associated with the formation of Askja caldera. Many postglacial eruptions also occurred along the ring-fracture. A major explosive eruption on the SE caldera margin in 1875 was one of Iceland's largest during historical time. It resulted in the formation of a smaller 4.5-km-wide caldera, now filled by Öskjuvatn lake, that truncates the rim of the larger central caldera. The 100-km-long Askja fissure swarm, which includes the Sveinagja graben, is also related to the Askja volcanic system, as are several small shield volcanoes such as Kollatadyngja. Twentieth-century eruptions at Askja have produced lava flows from vents located mostly near Öskjuvatn lake.

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Source: GVP, Smithsonian Institution