Volcanos

Roundup of Global Volcanic Activity

Karymsky (Kamchatka): A stronger than average explosion was reported yesterday (13:10 GMT), generating an ash plume to 18,000 ft (5.4 km) altitude and extending SE(Tokyo VAAC).

Sinabung (Sumatra, Indonesia): During the past days, explosions and pyroclastic flows - often occurring together - triggered by collapses of the lava dome have been more frequent and more intense than during most of the past months. The largest events produced ash columns reaching 4-5 km altitude and flows traveling up to 3-4 km length, in particular those on 29 Oct at 02:00 local time, 30 Oct at 09:15, and 31 Oct at 14:45. However, there are no signs that the rate lava extrusion itself, continuing at slow pace, has increased. It is more likely that the dome is in one of its recurring phases where enough lava has accumulated to produce increased instability, in turn resulting in more frequent collapse and explosion events.

Rinjani (Lombok): The activity that had started a week ago continues. Explosions continue to produce small ash plumes from vents on the upper flank of the Barujari cinder cone inside the volcano's caldera.

Dukono (Halmahera): Intense ash emissions continue to be reported almost daily by VAAC Darwin. This morning, an ash plume at estimated 8,000 ft (2.4 km) altitude extended almost 100 km to the north.

Una Una (North Sulawesi & Sangihe Islands): A recent period of volcanic unrest seems to be over. Seismic activity has decreased and VSI lowered its alert level back to green (normal) last week.