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Volcanic activity worldwide 28 Aug 2018: Fuego volcano, Krakatau, Dukono, Sangay, Sakurajima, Sabanc...

Tuesday Aug 28, 2018 21:00 PM |

Map of today's active volcanoes
Map of today's active volcanoes
Satellite image of Ebeko volcano on 28 Aug 2018
Satellite image of Ebeko volcano on 28 Aug 2018
Satellite image of Sakurajima volcano on 28 Aug 2018
Satellite image of Sakurajima volcano on 28 Aug 2018
A strong strombolian explosion sends ash into the sky and covers the area around the eruptive vent with lava bombs (image: Galih Jati / VolcanoDiscovery Indonesia)
A strong strombolian explosion sends ash into the sky and covers the area around the eruptive vent with lava bombs (image: Galih Jati / VolcanoDiscovery Indonesia)
Satellite image of Krakatau volcano on 28 Aug 2018
Satellite image of Krakatau volcano on 28 Aug 2018
Ebeko (Paramushir Island): Volcanic Ash Advisory Center Tokyo (VAAC) issued the following report: POSS ERUPTION OBS AT 20180828/0810Z FL100 EXTD SE OBS VA DTG:28/0830Z

Sakurajima (Kyushu, Japan): Volcanic Ash Advisory Center Tokyo (VAAC) issued the following report: ERUPTIVE ACTIVITY CONTINUING OBS VA DTG:28/1120Z
...27 Aug:
Volcanic Ash Advisory Center Tokyo (VAAC) issued the following report: ERUPTED AT 20180827/2253Z FL080 STNR OBS VA DTG:27/2250Z

Manam (Papua New Guinea): (28 Aug) Volcanic Ash Advisory Center Darwin (VAAC) issued the following report: VA OBS TO FL110 MOV TO WNW AT 28/0120Z.

Krakatau (Sunda Strait, Indonesia): Krakatau was still putting up a great show in the past week when we had a short private Krakatau expedition from 24 to 26 August 2018. Our Indonesian volcano tour guide Galih Jati sent us some spectacular images showing Strombolian to Vulcanian type of explosive eruptions sending ash and lava bombs hundreds of meters into the air and showering the volcano’s flanks. As observed on our mid-August Krakatau Volcano Special it seems that the volcano’s activity decreased with fewer eruptions on a daily basis (about 2 every hour). Throughout our Krakatau expeditions in July and August, we observed that the volcano's activity was up to 100 explosions a day before 22 August but lowered to around 60 eruptions a day since. The latest satellite information seems to also confirm that although there is a constant moderate to high thermal anomaly above Anak Krakatau, the peaks of very high heat emission seen in late July to mid August have not been repeated recently.

Galih sent us a detailed report of the volcano’s activity during our latest tour there: “Before sailing off we visited the Krakatau Volcano Observatory Post on 24 August around 11h00 am and were happy to see that there had already been 6 strong eruptions recorded on the seismograph since 06h00 am. We then set off for the Krakatau islands around 13.00 and as we got closer, Anak Krakatau welcomed its new guests with a big eruption at 14h05. As we arrived at 14h40, we stopped and observed the volcano from the boat, our distance being just about 1 km. Our patience was rewarded as we got two big eruptions with strong explosion sounds and bunch of lava bombs at 15h24 and 15h48. We then went to opposite Rakata island where we set up our camp and continued our observation until the next morning (25/8) during which time there were constant eruptions almost every 45 minutes - 1,5 hours.”

Galih describes how the biggest eruption was early on 25 August, at 00h40, with a very loud detonation sound and almost 90% of Anak Krakatau’s cone being covered by the glowing lava bombs. It seems that this larger explosion temporarily changed the morphology of the volcano’s active vent as later that same night the characteristics of the eruption shortly changed: after ca 02h30 several eruptions were mainly ash venting, without many (and only very small) lava bombs but with long lasting engine eruption sounds. The volcano however ‘recovered’ later that same day as from around 11h00 am onwards its activity was the same as witnessed before the mid night large explosion. Untill our group broke up camp and returned back to the coast of West Java on 26 August, the same activity continued with large explosive eruptions occurring about every hour, showering Anak Krakatau’s flanks with ash and incandescent bombs.
...28 Aug:
Volcanic Ash Advisory Center Darwin (VAAC) issued the following report: VA OBS TO FL040 MOV SW AT 28/0630Z.

Dukono (Halmahera): Volcanic Ash Advisory Center Darwin (VAAC) issued the following report: VA OBS TO FL070 MOV E/NE AT 28/0900Z.

Fuego (Guatemala): Volcanic Ash Advisory Center Washington (VAAC) issued the following report: VA FM ARND 1315Z ERUPTION HAS DISP.
...28 Aug:
Volcanic Ash Advisory Center Washington (VAAC) issued the following report: VA EMS APRX 0345Z

Sangay (Ecuador): Volcanic Ash Advisory Center Washington (VAAC) issued the following report: POSS VA EXHALATION 28/0915Z

Sabancaya (Peru): (28 Aug) Volcanic Ash Advisory Center Buenos Aires (VAAC) issued the following report: INTERMITTENT EMISSIONS
Previous news
Map of today's active volcanoes
Saturday, Aug 25, 2018
Etna (Sicily, Italy): The strombolian activity from the SE crater which started Thursday evening is progressively decreasing. From time to time weak ash emissions are still observed. The effusive activity has almost stopped. The seismic tremor is still at an elevated level, but it is also showing a decreasing trend. ... [more]

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