Map of today's active volcanoesSvartsengi (Reykjanes peninsula, SW Iceland): (6 Aug) As of Monday, the activity within the crater has completely ceased, accompanied by a drop in tremor levels.A minor activity was visible overnight, but no signs of activity have been detected yesterday. The eruption is now considered over. ... [read more] ... [show less] However, satellite and GNSS measurements show that land uplift has resumed—rising approximately 2–3 centimeters. This indicates continued magma accumulation beneath Svartsengi. If the uplift continues, it could result in new magma intrusions and potential future eruptions.The extent of the lava field has remained largely unchanged in recent days, but it is still unstable. This instability can cause sudden surges at the lava front. In such events, the edge may collapse unexpectedly, allowing a glowing stream of lava to advance rapidly. These surges are extremely dangerous, and staying well clear of the lava edge is crucial—even though the eruption has ended.Krasheninnikov (Kamchatka, Russia): The eruption at the volcano continues. The latest Sentinel-1 (Synthetic Aperture Radar onboard) acquisition showed an interesting view of the ongoing eruption. Following the major eruption on 3 August, a new lava arrived in the summit Northern Cone - the younger of the two summit craters - and continues to emerge over the northwestern flank.Klyuchevskoy (Kamchatka): Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Tokyo warned about a volcanic ash plume that rose up to estimated 27000 ft (8200 m) altitude or flight level 270 and is moving at 10 kts in E direction.The full report is as follows: VA AT 20250806/1430Z FL270 EXTD E OBS VA DTG:06/1430Z to 27000 ft (8200 m)...6 Aug:The effusive-explosive eruption at the volcano continues.The lava flow on the southwestern slope remains active, and it descends towards the Bogdanovich Glacier. ... [read more] ... [show less] A tall ash plume generates dense ash emissions up to 8 km elevation, associated to intense strombolian activity atop the edifice.Ibu (Halmahera, Indonesia): Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Darwin warned about a volcanic ash plume that rose up to estimated 6000 ft (1800 m) altitude or flight level 060, and is moving at 05 kts in W direction.The full report is as follows: VA TO FL060, LAST REPORTED AT 05/1609Z EST VA DTG:06/1710Z to 6000 ft (1800 m)Lewotolo (Lesser Sunda Islands): (6 Aug) Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Darwin warned about a volcanic ash plume that rose up to estimated 6000 ft (1800 m) altitude or flight level 060 .The full report is as follows: VA TO FL060 MOV NW REPORTED AT 06/0136Z EST VA DTG:06/0130Z to 6000 ft (1800 m)Dukono (Halmahera): (5 Aug) Volcanic Ash Advisory Center Darwin (VAAC) issued the following report: CONTINUOUS VA TO FL060, LAST REPORTED AT 05/1138ZKilauea (Hawai'i): The Hawaiian Volcano Observatory (HVO) reports that "episode 30 vigorous fountaining of the ongoing Halemaʻumaʻu eruption began at approximately 1:20 a.m. HST on august 6 and is currently producing broad fountains150-300 feet (45-90 meters) high from the north vent. Lava flows from the north vent have covered about 20% of the floor of Halemaʻumaʻu crater. There is a line of small fountains that formed south of the old south vent area that are producing lower volume flows. This appears to be a new vent for this eruption and seems to be associated with a cluster of small earthquakes just south of Halemaʻumaʻu. Past episodes have produced incandescent lava fountains over 1000 feet (300 meters) high that produce eruptive plumes up to 20,000 feet (6000 meters) above ground level. According to the National Weather Service, winds are light and variable from the north direction, which suggests that volcanic gas emissions and volcanic material may be distributed to the south but may fall in a broader pattern than during typical trade winds."...6 Aug:The next eruptive episode has started at the summit crater Halema'uma'u, with lava fountaining expected to start any time now. The Hawaiian Volcano Observatory (HVO) reports:"Lava became visible in the north vent at 12:55 a.m. HST and began vigorously overflowing at 12:56 a.m. in the early morning of Wednesday. ... [read more] ... [show less] This is the start of continuous low-level precursory activity for episode 30 of the ongoing Halemaʻumaʻu eruption. Lava flows and spattering continue at the north vent, followed by spattering and flows from the south vent at 1:12 a.m. HST. Sustained, high lava fountaining may begin soon.Nevado del Ruiz (Colombia): 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 and is moving at 25 kts in NW direction.The full report is as follows: DSCT VA CLD OBSD to 22000 ft (6700 m)Sangay (Ecuador): Volcanic Ash Advisory Center Washington (VAAC) issued the following report: NO VA EMSReventador (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: VA EMS CONT to 15000 ft (4600 m)Volcano Activity Summary for 6 Aug 2025:The new lava flow travels throught the NW slope of Krasheninnikov volcano (image: Sentinel-1)