Degassing from Villarica volcano yesterday (image: @AngaritaV/twitter)
The activity of the volcano remains stable at low levels characterized near-constant degassing from the crater. Emissions of water vapor and gases generated a white dense ash column rising several 300 m above the summit as can be seen in the video. The small lava pond in the summit crater, first observed in Nov last year, has remained essentially unchanged.
Its currently stable condition suggests that there is a delicate equilibrium between heat and magma supply and loss (through cooling and mild emissions during degassing).
Raung (East Java): (1 Feb) Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Darwin warned about a volcanic ash plume that rose up to estimated 13000 ft (4000 m) altitude or flight level 130 . The full report is as follows: VA TO FL130 REPORTED BY GND OBS AT 01/0650Z, MOV E to 13000 ft (4000 m)
Kilauea (Hawai’i): 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. … [read more] … [show less] 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.
Popocatépetl (Central Mexico): A significant change in activity has occurred since the last update (21 January 21) as we reported ongoing elevated tremor that started at the end of December 2020. On 22 January a volcanic tremor started to rapidly decrease and continues with periods of low amplitude values reaching 300-750 min / day around which it has been fluctuating during the past 9 days. Seismic network detected a sharp decrease from 770 minutes on 28 January to 42 minutes of volcanic tremor on 29 January. … [read more] … [show less] Vulcanian activity continues from the summit crater producing an ash columns that reached up to 19,000 ft (5,800 m) altitude.
Fuego (Guatemala): 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 and is moving at 20 kts in SW direction. The full report is as follows: CONT VA EMS to 15000 ft (4600 m)
Sangay (Ecuador): Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Washington warned about a volcanic ash plume that rose up to estimated 20000 ft (6100 m) altitude or flight level 200 . The full report is as follows: ONGOING VA EMS to 20000 ft (6100 m)
Sabancaya (Peru): Volcanic Ash Advisory Center Buenos Aires (VAAC) issued the following report: INTERMITTENT EMISSIONS
Volcano Activity Summary for 1 Feb 2021:
Satellite image of Sakurajima volcano on 1 Feb 2021
Vulcanic explosion from Popocatépetl volcano on 30 January (image: CENAPRED)
A significant change in activity has occurred since the last update (21 January 21) as we reported ongoing elevated tremor that started at the end of December 2020. On 22 January a volcanic tremor started to rapidly decrease and continues with periods of low amplitude values reaching 300-750 min / day around which it has been fluctuating during the past 9 days. Seismic network detected a sharp decrease from 770 minutes on 28 January to 42 minutes of volcanic tremor on 29 January.
Vulcanian activity continues from the summit crater producing an ash columns that reached up to 19,000 ft (5,800 m) altitude. Source: Centro Nacional de Prevención de Desastres volcano activity update 1 February 2021
Diagram shows decreasing values of volcanic tremor since 22 Jan (image: CENAPRED)
