Cracks divide active and inactive portions of the growing Halema‘uma‘u lava lake (image: HVO)
The effusive eruption of the volcano continues and has remained essentially unchanged at moderate levels. The western fissure continues to supply the lava into the growing Halema‘uma‘u lava lake. According to the Hawaiian Volcano Observatory (HVO) a north-south trending line of surficial cracks divides the boundary between the western active portion (left) and eastern stagnant portion (right) of the Halema‘uma‘u lava lake. Lake depth measurements from 28 January on both sides of the cracks (near center) indicate that the eastern portion of the lava lake is 4 m (13 ft) lower than the western portion of the lava lake. In contrast, the stagnant eastern portion is a duller gray with several smaller islands visible. North of the cracks (upper center), the top of the inactive northern vent spatter cone is nearly submerged by the rising lava lake. On 23 January a sulfur dioxide (SO2) emissions reached to a 2200 tonnes/day and continues at elevated levels including seismic activity. Source: Hawaiian Volcano Observatory volcano activity update 1 February 2021
Western fissure emits the gas content and supplies the lava flow into the lava lake. Snow from a recent storm can be seen on the summit of Mauna Loa Volcano, in the upper left corner of the image (image: HVO)
Suwanose-jima (Ryukyu Islands): Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Tokyo warned about a volcanic ash plume that rose up to estimated 4000 ft (1200 m) altitude or flight level 040 and is moving at 10 kts in N direction. The full report is as follows: VA EMISSIONS CONTINUING OBS VA DTG:31/1720Z to 4000 ft (1200 m)
Popocatépetl (Central Mexico): (31 Jan) Mild explosive activity continues from the volcano. The Volcanic Ash Advisory Center (VAAC) Washington reported intermittent emissions of volcanic ash plumes. The full report is as follows: sporadic emissions of volcanic ash
Fuego (Guatemala): Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Washington warned about a volcanic ash plume that rose up to estimated 14000 ft (4300 m) altitude or flight level 140 and is moving at 20 kts in SW direction. The full report is as follows: NEW VA EMS OBS to 14000 ft (4300 m)
Sangay (Ecuador): Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Washington warned about a volcanic ash plume that rose up to estimated 22000 ft (6700 m) altitude or flight level 220 . The full report is as follows: CONS VA EMS to 22000 ft (6700 m)
Reventador (Ecuador): Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Washington warned about a volcanic ash plume that rose up to estimated 15000 ft (4600 m) altitude or flight level 150 . The full report is as follows: NEW VA EM ARND 31/1028Z to 15000 ft (4600 m)
Sabancaya (Peru): Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Buenos Aires warned about a volcanic ash plume that rose up to estimated 24000 ft (7300 m) altitude or flight level 240 and is moving at 10 kts in S direction. The full report is as follows: PUFF EMISSIONS to 24000 ft (7300 m)
Volcano Activity Summary for 31 Jan 2021:
Satellite image of Klyuchevskoy volcano on 31 Jan 2021
