Stromboli (Eolian Islands, Italy): The eruptive activity has remains more or less unchanged: the lava flow is still active while sporadic explosive activity continues from the summit vents. As lava output rates from the 650 m vent fluctuate, the front of the lava flow, located in the central part of the Sciara del Fuoco since 6 Sep, advances and retreats in the lower part of the Sciara, sometimes almost reaching the sea.
A short-lived overflow of lava to the northern part of the flat area at approx. 600 m occurred this morning.
Heat radiation from the volcano as measured by satellite has been showing a slowly decreasing trend since 22 August, suggesting that the magma discharge rater has been overall declining.
At the summit vents, strombolian-type ash explosions occur from time to time as well as small collapse events modifying the geometry of the various cones present, in particular in the western crater area.
Sinabung (Sumatra, Indonesia): The volcano continues to slowly extrude viscous lava feeding the lava lobe on its southeastern flank. Occasional rockfalls, caused by instabilities on the steeper upper parts of the lava flows, continue to occur from time to time and represent a major hazard: Two larger ones occurred yesterday and produced pyroclastic flows that traveled 3.5 km distance to the southeast.
Seismic activity has been generally low along with the persistent effusive activity which has been going on for more than 10 months now.
Dukono (Halmahera): Explosive activity continues at the volcano. An ash plume rising to 7,000 ft (2.1 km) was reported yesterday evening extending 40 km to the NE (Darwin VAAC).
Kilauea (Hawai’i): Following several days of increased pressure at Kilauea’s summit, lava activity is picking up on the June 27th flow with new flows continuing to move to the north, on a pathway leading slightly away from the town of Pāhoa for now.
Lava activity is present wherever the pressure has caused “leaking” from the lava tube system, not only close to the stalled front but also farther “upstream”. However, the fact that there is plenty of lava returning to the flow front indicates that this pathway remains open, and the flow will most likely gain momentum and pick up speed over the next several days.
The threat is not past for Pāhoa, but this is certainly a positive development for the small town. The threat to the county highway continues although delayed, and work continues on several bypasses through the lower communities while work on the Chain of Craters road has been underway for about a week. New routes for power lines are also under development, so that the impact will theoretically be minimized once the lava does eventually cut off the highway. Several small private schools have already closed due to the uncertainty, but most everyone else continues to watch and wait.