The Volcano Adventure Guide: Excellent information and background for anyone wishing to visit active volcanoes safely and enjoyably. The book presents guidelines to visiting 42 different volcanoes around the world.
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Strombolian activity at the SE crater's saddle vent and the peaks of tremor accompanying each short-lived episode (image: Boris Behncke / INGV Catania)
Satellite image of Klyuchevskoy volcano on 19 May 2017
Small vulcanian eruption at Sakurajima earlier today
Satellite image of Ibu volcano on 18 May 2017
Satellite image of Sinabung volcano on 19 May 2017
Satellite image of Dukono volcano on 19 May 2017
Earthquakes under Piton de la Fournaise during 04:00 and 17:30 on 18 May 2017 (OVPF)
Etna (Sicily, Italy): We have several free spaces for (hiking) tours to the summit area of Etna in small groups (max 8 persons) on 16 and 17 June. The excursions are accompanied by a certified mountain guide and a volcanologist from our team (Dr. Tom Pfeiffer) and will aim to approach volcanic activity if present and the most interesting volcanic features. Visit the Etna Tours page for more info! ...19 May: Since 11 May, Etna has been in an unusual state of activity. At remarkably regular intervals of approx. 8 hours, the "saddle vent", located between Etna's old and new Southeast Crater, has been producing more than 20 brief episodes of mild strombolian activity, each accompanied by a short-lived increase in volcanic tremor amplitude. The episodes are further characterized by the absence of strong degassing. What causes this unusual and certainly transient behavior is not exactly known. Researcher Dr Marco Neri tries to give an explanation in an article on La Gazzetta Siracusana(loosely translated): ... [read more] ... [show less] "In fact, Etna volcano produces "mini-eruptions" that last a few tens of minutes, located at the top of the New South-East Crater, at about 3300 meters. There would be nothing strange about this, except that these events occur with an impressive regularity, about 3 a day, and at fairly constant intervals of about eight hours. A phenomenon that closely resembles that of geysers, although in this case it is magma to erupt at the surface and not water. ... These small eruptive events are always accompanied by an increase in the amplitude of volcanic tremor, which corresponds to a vibration produced by movements of volcanic fluids circulating within the eruptive duct. When the magma approaches the surface and erupts, tremor increases sharply. ... Therefore, the tremor graph shows a series of almost regular peaks for amplitude and intervals. It's like volcano's hiccups!
Sakurajima (Kyushu, Japan): Since its re-awakening in late March, the volcano seems to be back in its typical activity of intermittent small to moderate vulcanian explosions at rates of typically 2-3 per day. It also seems that since late April, it has picked up again to levels similar as during much of 2013-15, with sometimes larger explosions that generate tall ash plumes of up to 4-5 km height. Most of the explosions come from the younger Showa crater on the upper eastern flank, although some also occur from the older summit vent Minamidake. ... [read more] ... [show less] During the past days, 2-3 explosions have occurred each day, with ash plumes that rose to between 5,000 and 13,000 ft (1,500-4,000 m) altitude, i.e. ranging from a few hundreds to approx. 2,500 km. This activity has has been characteristic of the volcano for most of the past years, with an unusual pause during late July 2016 and March this year.
Piton de la Fournaise (La Réunion): A helicopter overfly yesterday evening confirmed that the reported short-lived eruption did actually not take place: no fresh lava could be seen at the supposed site of the eruption. The eruption tremor detected by the observatory was likely only caused by degassing while the rising magma eventually did not reach the surface, but stopped at shallow depth. Scientists described dry "fractures on the surface". ... [read more] ... [show less] However, it might only be a matter of a short time until the magma continues to rise and actually does produce an eruption. Shallow earthquakes under the area continue. The Volcano Observatory (OVPF) noted 32 superficial volcanic-tectonic earthquakes at or near 2 kilometers depth during the first 12 hours of 18 May. The quakes were mainly located under the northeastern sector of the Fouqué enclosure (Enclos) and more precisely under the Piton Crac.
Stromboli (Eolian Islands, Italy): (18 May) The activity at Stromboli has recently increased a lot. During our ongoing tour to Stromboli and Etna, Marco Fulle reported that eruptions have been occurring at intervals of 5-10 minutes, most often from the two northeastern vents (towards the Stromboli village side), but also the central and western vents are active as the below time-lapse video shows. ... [more]
Dukono volcano photos: Dukono on Halmahera in Indonesia has been in permanent activity for years, often producing ash plumes that drift around the northern part of the island and have become normality.
Raung volcano photos: One of the largest and most active volcanoes in East Java, rarely-visited and relatively unknown Raung became (in)famous during its recent eruption in 2015 when its frequent ash plumes forced the repeated closure of Bali's airport.
Fascination Volcano: Discover with us the fascinating natural history of Santorini volcano in Greece on this walking and study tour.
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