Based on analysis of satellite imagery and wind data, the Darwin VAAC reported that during 3-4 January an ash plume from Barren Island rose to an altitude of 1.5 km (5,000 ft) a.s.l. and drifted almost 85 km SW.

Ash and steam plume from Barren Island on 16 Nov (Landsat 8 image, annotated by Culture Volcan)
With all likelihood, the volcano continues to be in eruption. It is very remote and rarely directly observed, but satellite imagery regularly show albeit weak thermal signals - again present more or less continuously since August and more frequent since October this year.
Wed, 7 Oct 2015, 06:00
Based on analysis of satellite imagery and wind data, the Darwin VAAC reported that during 8-9 October ash plumes from Barren Island rose to altitudes of 1.5-2.1 km (5,000-7,000 ft) a.s.l. and drifted 75-100 km NE.
Read allWed, 23 Sep 2015, 06:00
Based on analysis of satellite imagery and wind data, the Darwin VAAC reported that on 22 September an ash plume from Barren Island rose to an altitude of 1.8 km (6,000 ft) a.s.l. and drifted 45 km E.
Read allWed, 19 Aug 2015, 16:18
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MIROVA thermal signals of Barren Island volcano
An ash plume was reported this morning, at estimated 5,000 ft (1.5 km) altitude, extending 50 km to the east from the island (VAAC Darwin). This suggests that a new phase of activity is occurring at the volcano.
Read allWed, 19 Aug 2015, 06:00
Based on analysis of satellite imagery and wind data, the Darwin VAAC reported that on 19 August ash plumes from Barren Island rose to an altitude of 1.5 km (5,000 ft) a.s.l. and drifted 55 km E.
Read allWed, 10 Jun 2015, 06:00
Based on pilot observations, analysis of satellite imagery, and wind data, the Darwin VAAC reported that during 12-13 June ash plumes from Barren Island rose to an altitude of 2.1 km (7,000 ft) a.s.l. and drifted 25-55 km NE.
Read allSat, 6 Jun 2015, 08:46
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Hot spot at Barren island (MIROVA)
A steam and ash plume at estimated 10,000 ft (3 km) altitude and extending 35 km to the east from the volcano was detected yesterday on MTSAT satellite imagery (VAAC Darwin).
Read allWed, 3 Jun 2015, 06:00
Based on analysis of satellite imagery and wind data, the Darwin VAAC reported that during 5-7 June ash plumes from Barren Island rose to altitudes of 2.4-3 km (8,000-10,000 ft) a.s.l. and drifted 35-45 km NE and E.
Read allMon, 27 Apr 2015, 08:22
A pilot reported an ash plume rising to 10,000 ft from the volcano. Likely, eruptive activity which had produced a new lava flow in March is still going on or has resumed.
Wed, 22 Apr 2015, 06:00
According to the Darwin VAAC, a pilot observed an ash plume from Barren Island that rose to an altitude of 3 km (10,000 ft) a.s.l. Ash was not identified in satellite images.
Read allSun, 5 Apr 2015, 11:05
An eruption occurred in mid to late March with strombolian explosions and the effusion of a lava flow from the central cone.
Sat, 7 Feb 2015, 13:27
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Hot spot detected at Barren Island via MIROVA
As the
Culture Volcan blog pointed out, a weak thermal anomaly was detected on satellite data above the volcano yesterday. The hot spot is weak, but could indicate some sort of activity occurring at the volcano. What could be a plume is visible on other satellite imagery, but for now, there is no confirmation of volcanic activity.