Map of today's active volcanoesSvartsengi (Reykjanes peninsula, SW Iceland): The effusive eruption at the site continues.Fountaining is being active from two fissures now. The larger chain of vents is estimated to be about 2.4 km long. A smaller one opened west of Fagradalsfjall and its length is approx. 500 meters. ... [read more] ... [show less] The fountain-fed lava streams ooze out towards two directions - east and west from both fissures, even though the eastern branch appears to be more active.Meanwhile, the seismic activity has decreased early this morning....16 Jul:A new eruption has started early this morning on the Reykjanes peninsula.Following an intense earthquake swarm indicating the final push of magma towards the surface from shortly after midnight, an eruptive fissure opened southeast of Litla-Skógfell at 3.54 am local time. ... [read more] ... [show less] The eruption fissure extended slightly to the north at the beginning, reaching about 700 m length, and then has remained stable in the following two hours. The lava fountains along the fissure (known as curtain of fire) have quickly produced a lava field that reached about 1 square kilometer in surface area within the first hour.Kirishima (Kyushu): Volcanic Ash Advisory Center Tokyo (VAAC) issued the following report: POSS ACTIVITY CONT. VA CLD UNKNOWN AT 20250716/1800ZIbu (Halmahera, Indonesia): Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Darwin warned about a volcanic ash plume that rose up to estimated 7000 ft (2100 m) altitude or flight level 070 .The full report is as follows: VA TO FL070 MOV NE, LAST REPORTED AT 16/1616Z to 7000 ft (2100 m)Lewotolo (Lesser Sunda Islands): 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 16/1622Z EST VA DTG:16/1830Z to 6000 ft (1800 m)Semeru (East Java, Indonesia): (15 Jul) Volcanic Ash Advisory Center Darwin (VAAC) issued the following report: DISCRETE VA EMISSIONS TO FL150, LAST REPORTED AT 15/1700ZMarapi (Western Sumatra, Indonesia): (16 Jul) Volcanic Ash Advisory Center Darwin (VAAC) issued the following report: VA TO UNKNOWN HEIGHT REPORTED FM GND AT 16/0346ZDukono (Halmahera): (15 Jul) Volcanic Ash Advisory Center Darwin (VAAC) issued the following report: CONTINUOUS VA TO FL080 MOV NE, LAST REPORTED AT 15/1212ZPopocatépetl (Central Mexico): (16 Jul) Volcanic Ash Advisory Center Washington (VAAC) issued the following report: NO VA EMSSantiaguito (Guatemala): 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 ashNevado del Ruiz (Colombia): (15 Jul) Volcanic Ash Advisory Center Washington (VAAC) issued the following report: VA EM DTCTDSangay (Ecuador): Volcanic Ash Advisory Center Washington (VAAC) issued the following report: POSS VA EMS CONTReventador (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)Erta Ale (Danakil depression, Ethiopia): A sudden strong explosive eruption has occurred at the summit caldera of the volcano yesterday. Dense ash plumes were seen rising about 800-1000 m above the summit and causing ash fall over the northwestern sector of the volcano.Reports suggest that lava has returned to the northern pit crater, but what exactly caused the explosive activity is unclear. ... [read more] ... [show less] Normally, Erta Ale with its typical fluid basaltic magmas that most often forms lava lakes in the summit crater or extensive lava flows during flank eruptions or overflows from the summit vents is not producing much explosive activity of this type. This means something very unusual is taking place. One possibility is that could be related to collapse processes due to quickly rising and falling magma levels in the upper conduits. Another one could be that rising magma got in contact with ground water, producing violent explosions (so-called phreatomagmatic activity).In any case, the summit area should be considered a very dangerous place at the moment, not only because of the risk of being hit by ejecta or caught in hot ash flows, but also because the terrain might be undergoing re-adjustments and form new craters (i.e. the ground can collapse at unexpected places especially inside the vast caldera).Volcano Activity Summary for 16 Jul 2025:The lava flow field continues to enlarge away from the fissure (image: Guide to Iceland/x.com)