Volcanic activity worldwide 9 Jun 2018: Dukono volcano, Reventador, Kilauea, Sakurajima, Sabancaya, Ebeko
Saturday Jun 09, 2018 21:00 PM |
Map of today's active volcanoes
Satellite image of Ebeko volcano on 9 Jun 2018
Satellite image of Sakurajima volcano on 9 Jun 2018
Satellite image of Sakurajima volcano on 8 Jun 2018
Around 3:00 a.m. HST on June 8, lava fountains erupting from fissure 8 on Kīlauea Volcano's Lower East Rift Zone were reaching heights of 55-65 meters (180–220 feet). (HVO/USGS)
Ebeko (Paramushir Island): Volcanic Ash Advisory Center Tokyo (VAAC) issued the following report: POSS ERUPTION OBS AT 20180609/1130Z FL060 EXTD SE OBS VA DTG:09/1200Z
This image taken on a mid-day overflight on June 5 shows the ongoing partial collapse of Haleama’uam’u crater at the summit of Kilauea volcano. To the north of the old overlook parking area (left in the image) is the site of the former lava lake – now a deep hole piled with wall-rock rubble. The western portion of Haleamu’uma’u (upper part of image) has moved down and toward the centre of the crater as new cracks form on the caldera floor to the west. The summit is still subsiding due to withdrawal of magma towards the east rift zone. (HVO/USGS)
Sakurajima (Kyushu, Japan): Volcanic Ash Advisory Center Tokyo (VAAC) issued the following report: EXPLODED AT 20180609/1227Z OVER FL070 STNR OBS VA DTG:09/1220Z
Volcanic Ash Advisory Center Tokyo (VAAC) issued the following report: ERUPTED AT 20180608/2043Z FL090 EXTD E OBS VA DTG:08/2040Z
Dukono (Halmahera): (9 Jun) Volcanic Ash Advisory Center Darwin (VAAC) issued the following report: CONTINUOUS VA EMISSION TO FL070 EXT W.
Kilauea (Hawai'i): Volcanic Ash Advisory Center Washington (VAAC) issued the following report: RPRT OF VA EMS AT APPROX 07/1448Z
The eruption in the lower East Rift Zone remained concentrated on fissure 8, where continuous vigorous lava fountaining fluctuates, at times reaching heights of 70 meters (230 feet). This activity continues to feed the lava channel flowing northeast before turning westward toward Kapoho where it transforms in a very broad lava flow that by now almost entirely covered Kapoho and Vacationland and filled up Kapoho Bay. Sideways moving of this broad Kapoho Bay lava flow creeps north through what remains of Kapoho Beach Lots, but none of the other previously active lobes of the large fissure 8 flows are receiving fresh lava and have hence stalled. Also no other fissures apart from fissure 8 were actively erupting lava in the past few days. The only activity observed was some incandescence from fissure 24 and heavy fuming from fissures 24, 9 and 10 – all located just west of fissure 8.
About 600 homes have been destroyed by the multiple lava flows that were produced during this lower East Rift Zone eruption, in the Leilani Estates during the early days of the eruption and lately in Kapoho and Vacationaland. The large lava delta that has been created outside former Kapoho Bay is about 1.9 (1.2 mi) wide, creating multiple vigorously steaming lava ocean entries as well as upwelling of a large offshore area where lava is actively flowing onto the ocean floor. HVO/USGS warn that the lava delta is unstable because it is built on unconsolidated lava fragments and sand, loose material that can easily be eroded away by surf, causing the new land to become unsupported and slide into the sea. Additionally, the interaction of lava with the ocean creates "laze", a corrosive seawater plume laden with hydrochloric acid and fine volcanic particles that can irritate the skin, eyes, and lungs.
Since the start of the eruption about 35 days ago, the volume of lava erupted so far in Puna is about 0.11 cubic kilometres in total. Phil Ong compares this to the 35 years long eruption that had been going on at Pu’u O’o prior to the start of this eruption, and notices that although the eruption rate is about 25 times higher, is not nearly a match to the ca. 4.5 cubic kilometres that were erupted from Pu’u O’o since 1983. Much like the fate of the lava lake in Haleam’uma’u at Kilauea’s summit, the lava lake in Pu’u O’o has disappeared since all magma was drained to the eruption site in the lower East Rift Zone from early May. The crater floor of Pu’u O’o collapsed and the crater now has a funnel shape geometry with a deep cylindrical shaft, filled with rubble, that is about 350 meters (1150 feet) deep. The many earthquakes that are occurring on Kilauea volcano also affect the Pu’u O’o vent. HVO/USGS reports that tollowing a magnitude-3.2 earthquake at the summit, twelve rockfalls were recorded in Puʻu ʻŌʻō between 10:31 and 10:56 AM on Friday 8 June, with a prominent, but brief, red dust plume ejected into the air around 10:50 AM.
Subsidence of Kilauea’s summit keeps going on as magma continues to be drained from the summit area towards the active fissure eruption site in the lower East Rift Zone. As much as 9900 earthquakes have been registered on Kilauea over the past 30 days, most of which occurred at the volcano’s summit. These events have led to dramatic changes in and around Halema’uma’a crater which for the past 10 years contained an active lava lake. Since the start of the lower East Rift Zone eruption, this lava lake has been systematically drained – leaving behind a large empty vent with unstable walls that partially collapse, creating explosions with large ash plumes. Continuous deflation of the whole summit area and its accompanying earthquakes in turn also destabilise the walls of the Halema’uma’u vent and surrounding crater, resulting in widening of the vent and partial collapse of the crater as its west side is slumping inwards due to the formation of large cracks on the Kilauea caldera floor.
Over the past week a cycle emerged in the seismicity monitored at Kilauea’s summit area, where increasingly larger and more frequent earthquakes culminated in a magnitude 5 earthquake. These earthquakes are usually accompanied by an explosion and ash cloud from Halema’uma’u crater and followed by a short period of less earthquakes before seismicity picks up again, building towards the next larger earthquake and explosion. The last two of these larger earthquakes were a M5.6 earthquake on Wednesday afternoon 6 June at 16h07 and a M5.2 earthquake on early Friday morning 8 June at 02h44. In each case there was also a small explosion at Halema’uma’u crater creating an ash plume that rose up to about 3050 meters (10,000 feet). Each time summit seismicity dropped significantly right after the earthquake and explosion, but then picked up again a few hours later and gradually increased until the next larger event.
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Reventador (Ecuador): Volcanic Ash Advisory Center Washington (VAAC) issued the following report: POSS VA EMS
Volcanic Ash Advisory Center Washington (VAAC) issued the following report: NEW VA EMS.
Sabancaya (Peru): (9 Jun) Volcanic Ash Advisory Center Buenos Aires (VAAC) issued the following report: UNABLE TO DETECT
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