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 Actualités du volcan Bulusan:Thu, 29 Dec 2016, 19:01
 Phreatic explosion at Bulusan this afternoon (image: PHILVOLCS) A moderately strong phreatic explosion occurred this afternoon at the volcano at 14:40 local time, lasted approx. 16 minutes and produced an ash plume that rose 2000 m. ...plusPHILVOLCS reported increased seismic activity during 22-25 Dec preceded the event which seems to be the result of destabilization of the shallow hydrothermal system. GPS data also indicate slight inflation of the volcanic edifice, indicating internal pressurization (likely caused by an underlying magma body). [ moins] Thu, 29 Dec 2016, 07:30
Satellite image of Bulusan volcano on 29 Dec 2016 Volcanic Ash Advisory Center Tokyo (VAAC) issued the following report: ...plusFVFE01 at 07:22 UTC, 29/12/16 from RJTD [ moins] [ lire toutes] Sun, 23 Oct 2016, 08:00  Satellite image of Bulusan volcano on 23 Oct 2016 Volcanic Ash Advisory Center Tokyo (VAAC) issued the following report: ...plusFVFE01 at 07:52 UTC, 23/10/16 from RJTD [ moins] [ lire toutes]
Tue, 18 Oct 2016, 22:15 Volcanic Ash Advisory Center Tokyo (VAAC) issued the following report: ...plusFVFE01 at 22:12 UTC, 18/10/16 from RJTD [ moins] [ lire toutes] Tue, 18 Oct 2016, 13:26
 Ash emissions from Bulusan on 17 Oct 2016 (image: Drew Zuniga) New ash emissions occurred from the volcano yesterday morning at 07:36 local time. This activity follows intense degassing and a small phreatic explosion on 6 October. ...plusThe new emissions came from the new vent on the southeast slope observed last week. The resulting ash plume rose approx. 1000 m and caused light ash falls. According to PHILVOLCS, the activity is driven entirely by steam and does not involve fresh magma. Alert level of the volcano remains at 1 with an exclusion zone of 4 km radius around the summit crater. [ moins] [ lire toutes] Mon, 17 Oct 2016, 01:00 Volcanic Ash Advisory Center Tokyo (VAAC) issued the following report: ...plusFVFE01 at 00:58 UTC, 17/10/16 from RJTD [ moins] [ lire toutes]
Fri, 7 Oct 2016, 12:05  Bulusan on 7 Oct with a new very active fumarole on the southeast slope (image: PHILVOLCS) A small phreatic explosion took place at the summit crater of the volcano on 6 Oct at 03:30 am (local time). ...plusBad weather prevented direct observation of the eruption, but ash falls were recorded in several neighboring communities (Rizal, Buenavista Gubat Proper, Tugawe, Tigkiw, Ariman, Bintuco, Bulacao, Naagtan). PHILVOLCS reported that new fissures, which formed in late September on the southeast side of the summit cone, have recently become more active and produce strong degassing and occasional ash venting. Apparently, this activity has further increased since yesterday's explosion: this indicates that the internal hydrothermal system is now more pressurized and more unstable than before. [ moins] [ lire toutes]
Fri, 16 Sep 2016, 09:30  Satellite image of Bulusan volcano on 16 Sep 2016 Volcanic Ash Advisory Center Tokyo (VAAC) issued the following report: ...plusFVFE01 at 09:21 UTC, 16/09/16 from RJTD [ moins] [ lire toutes] Thu, 28 Jul 2016, 12:05
PHIVOLCS reported that on 20 July white-to-light-gray plumes rose to low levels above Bulusan and drifted WNW. During 21-25 July diffuse white plumes rose as high as 250 m above the crater and drifted NW and SW. The Alert Level remained at 1, indicating abnormal conditions and a 4-km-radius Permanent Danger Zone (PDZ). ...plus(Smithsonian / USGS Weekly Volcanic Activity Report 20-26 July 2016) [ moins] Fri, 10 Jun 2016, 07:46  Eruption of Bulusan volcano this morning (PHILVOLCS) A sudden eruption occurred this morning (at 11:35 local time). An explosion generated an ash plume that rose about 2000 m above the volcano's summit and drifted northwest, causing light ash falls in nearby downwind areas. ...plusAccording to PHILVOLCS, the eruption preceded by a seismic swarm with more than 100 small earthquakes and lasted 5 minutes. The eruption itself was only steam-driven - no magma itself has reached the surface,- and caused by explosion of over-pressurized and over-heated fluids from the volcano's strongly developed hydrothermal system. A similar explosion had occurred on 21 February. Following it, scientists monitoring the volcano have been seeing an inflation of the edifice (swelling of the ground) since May, probably caused by magma intruding at depth. This would have been providing new energy (heat) to the system and cause increasing instability. [ moins] [ lire toutes]
Mon, 22 Feb 2016, 12:05  Eruption of Bulusan volcano yesterday (youtube) An unexpected small eruption occurred at the volcano yesterday afternoon. At 17:01 local time, two successive small explosions from a fissure vent on the west-northwestern part of the summit crater produced an ash plume that rose approx. 500 meters and caused light ash fall in some nearby villages such as Juban 11 km NW and Irosin 8 km SSW of the volcano. ...plusThe eruption was likely phreatic or hydrothermal, i.e. the result of phreatic activity (overheated, pressurized water in the upper conduit area flashing to steam with no fresh magma involved, but this can only be determined if an analysis of the ash is done. The eruption came with little warning, although PHILVOLCS mentions that increased seismicity was recorded on 20-21 February (something that in itself is not very unusual or sufficient to predict eruptions). The explosion itself was immediately preceded by a rock fracturing earthquake, which reflected the moment rock layers inside the volcano ruptured to release accumulated pressure. [ moins] [ lire toutes]
Plus sur VolcanoDiscovery: Private geology tour on Santorini: We offer you private geology tours to get to know the extraordinary geology and natural history of the island, but also aspects of the deep connection with its cultural history and archaeology.
 Volcano Special Tours: We organize tours to particularly active volcanoes and during ongoing eruptions for extended observation time from various viewpoints. These trips, exclusively for very small groups, are often announced only at short notice and require fast travel and flexibility. Each trip is accompanied by a volcanologist from our team. Examples include: Kilauea (Hawai'i), Colima (Mexico), Krakatau and many others.  Volcano News group: Join our group on facebook: post reports, updates, or other interesting facts about volcanism and volcanic activity worldwide and discuss with other members.  Photos from Kamchatka: Kamchatka in Russia's far east is one of world's remotest regions and has an almost unparalleled density of active volcanoes. Look at photos taken during our expeditions from this wonderful corner of the world! |