Nouvelles du volcan Kilauea
Kilauea volcano update: Vigorous fountaining from fissure 8 continues, the resulting lava flow has completely filled Kapoho Bay and created a second ocean entry at Vacationland
Wednesday Jun 06, 2018 11:00 AM | IS
Lava flows and fissures map as of 10:00 a.m. HST, June 5, 2018. Given the dynamic nature of Kīlauea's lower East Rift Zone eruption, with changing vent locations, fissures starting and stopping, and varying rates of lava effusion, map details shown here are accurate as of the date/time noted. Shaded purple areas indicate lava flows erupted in 1840, 1955, 1960, and 2014-2015. (HVO/USGS)
This thermal map shows the active fissure system and lava flows as of 12:30 pm on Tuesday, June 5. The flow from Fissure 8 remains highly active, with the flow front entering the ocean at Kapoho Bay area. The black and white area is the extent of the thermal map. Temperature in the thermal image is displayed as gray-scale values, with the brightest pixels indicating the hottest areas. (HVO/USGS)
In the Lower East Rift Zone lava effusion persists from fissure 8 which continues to feed a channel transporting lava eastward to the ocean entry in the Kapoho Bay area. HVO's Tuesday 5 June mid-day overflight showed that this flow has completely filled Kapoho Bay and formed a lava delta extending about 1.3 kilometre (0.8 miles) out from the former coastline. Meanwhile the outbreak of this flow that started to wrap around the western side of Kapoho cinder cone has completely encircled it, re-joined the wide Kapoho Bay lava flow channel but travelled south of it where it now creates a second ocean entry in the Vacationland tidepools area. The destruction of the Kapoho Bay and Vacationland neighbourhoods and beautiful recreational areas is immense as almost all of it got covered by the fissure 8 lava flow over the past 2 days. Whatever remains is still under threat as the wide fissure 8 lava flow is also still spreading sideways
HVO scientists captured this aerial view of a much-changed Halema‘uma‘u during their overflight of the summit on the afternoon of June 5. Explosions and collapse within Halema‘uma‘u have enlarged the crater (foreground) that previously hosted the summit lava lake, and the far rim of Halema‘uma‘u has dropped with continued summit deflation. (HVO/USGS)
Facebook post from ExtremeExposure showing unbelievable and sad aerial photographs of the destruction of Kapoho Bay area:
Over the past week eruptive activity in the fissure system concentrated on fissure 8 and the massive lava flow channel that was created from it, traveling fast north eastwards along highway 132 before turning eastward and inundating the Kapoho Bay area. Local volunteers daily head out by boat to the cut off area around Poihiki on rescue missions for any animals and persons that got stranded there after the fissure 8 lava flow covered the intersection between highway 132 and 137. Meanwhile northernmost lobe of the Fissure 8 flow, in the Noni Farms Road area, is still barely advancing to the northeast and minor breakouts along the channelized fissure 8 flow have been very small and stagnated before travelling any significant distance.
The intensity of lava fountaining from fissure 8 fluctuated over the past 7 days, at times increasing the lava fountains’ height from about 45 m (150 feet) to 75m (250 feet) before it falls back to about 40- 55 m (130 – 180 feet) high. Downwind from the fountains a new cinder cone (pu’u) has formed of about 35 m (120 feet) high and high amounts of Pele’s hair and reticulate (foamy lava) have been carried and spread across the larger downwind area. There is no way of knowing for how much longer this eruption will go on, but it seems that the fissure 8 vent is now well established within the plumbing system of the currently active fissure eruption sire. Fluctuation in the height of the resulting lava fountains is thereby normal as it reflects pulsation in the magma input and pressure build-up below. Although impressive, the currently witnessed max 400 feet high lava fountains of this eruption are still small compared to the up to 1800 feet tall fountains that were produced in the Mauna Ulu eruption (1969 – 1974) or the present record of around 1900 feet lava fountaining from the vent in Kiluaea Iki in 1959.
It is of course also possible that other fissures are re-activated or new ones will open up. Recent eye witness reports state intense degassing and perhaps even minor amounts of lava being erupted from fissures 9 and/or 24 at the western part of the active fissure system. If large lava flows would form from these fissures they are likely to destroy large areas of the remaining Leilani estates subdivision.
Meanwhile at Kilauea’s summit caldera inward slumping of the rim and walls of Halema`uma`u crater continues in response to ongoing subsidence of the entire summit area. HVO reports that seismicity remained at high levels for most of Monday night (4 june) and into Tuesday morning (5 June) when a small explosion occurred at 4.32 AM HST. This explosion had an equivalent earthquake magnitude of M5.5 and generated an a small plume that rose about 1000 feet (305 meter) above the summit. Summit earthquake activity dropped right after this explosion but has since been slowly on the rise once again, following the same pattern of summit seismicity in the previous weeks. Locally felt earthquakes are expected to continue, and further ash explosions are likely.
The HVO/USGS has now installed a webcam for a continuous YouTube live stream of what is going on at Kilauea’s summit caldera:
Sulfur dioxide emissions from the volcano's summit have decreased, over the last week, but emission rates remain high enough to impact air quality in downwind regions. Additional bursts of gas released with intermittent explosive activity are also transported downwind and may temporarily affect air quality as well (HVO/USGS).
Tuesday, Jun 05, 2018
The eruption continues without significant changes: lava fountaining remains strong from fissure #8 although a bit decreased during the past day, feeding a large river of lava that flows towards the new ocean entry at Kaphoho. ... lire toutes
Monday, Jun 04, 2018
Monday, Jun 04, 2018
Kilauea volcano update: Lava fountaining continues at fissure 8, the resulting lava flow almost reaching the ocean at Kapoho
In the Lower East Rift Zone vigorous fountaining persisted from fissure 8 throughout the weekend, feeding large amounts of lava into the channel that runs northeast as the western branches of this flow became inactive during the night from Friday 1 to Saturday 2 June. The remaining fissure 8 lava flow continued to travel along Highway 132 to Kapoho and eventually crossed Highway 137 at the ‘Four Corners’ intersection of Highways 132 and 137 on Saturday morning 2 June at 9h30 am local time. It thereby effectively cut off the land south of this active flow front from Pohoiko to Vacationland Hawaii where any people that got stuck are evacuated by boat and helicopter. The same lava flow subsequently wrapped around Kapoho cinder cone and entered it through the gap on its east side, filling up the crater and creating a large steam plume as it evaporated all the water of Green Lake. As lava continues to pour into the Kapoho cinder cone in Green forest, it creates a stunning ‘lava fall’ The active flow then spread out to a 0.5 mile wide lava flow front that continues to make its way towards the ocean at Kapoho Bay. On Sunday evening 3 June 19h00 local time HVO/USGS reported that this flow front was merely 225 meter (245 yards) away from the ocean. ... lire toutes
Monday, Jun 04, 2018
Sunday, Jun 03, 2018