Nouvelles du volcan Kilauea
Kilauea volcano update: Lower East Rift Zone: sustained fissure 8 fountaining with perched, fast-flowing lava channel and ocean entry
Thursday Jun 14, 2018 13:51 PM | IS
Image taken on Tuesday morning June 12, 2018, showing the active perched channel with braided lava flows that is fed by Fissure 8 (fountain visible in the distance). (HVO/USGS)
13 June photographs showing Fissure 8 lava fountains that reach heights of 40-45 m (130-150 ft) from within the growing cone of cinder and spatter, which is now about 40 m (130 ft) at its highest point. (HVO/USGS)
Thermal map of the active fissure system and lava flows as of 2 pm on Tuesday, June 12. The fountain at Fissure 8 remains active, with the lava flow entering the ocean at Kapoho. Very small, weak lava flows have been active recently near the Fissure 18 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)
Over the past 2 days, Kilauea's eruptive activity in the lower East Rift Zone persisted with little change. Fissure 8 continues to vigorously effuse lava fountains of varying heights, sometimes 10 meter (35 feet) above the growing cone of cinder and spatter which is now about 45 m (140 ft) at its highest point.
Aerial view of the ocean entry at Kapoho, where a lava delta about 250 acres in size is filling the bay, early morning of June 12, 2018. At this time, the south side of the ocean entry was most active, with many small streams of lava and corresponding steam plumes spread along a fairly broad section of the southern part of the delta. (HVO/USGS)
This fountaining continues to feed huge amounts of lava through the massive perched lava channel that runs for about 8 miles (13 kilometer) before reaching the ocean at Kapoho. According to HVO/USGS calculations, there is at least 100 cubic meters of lava transported through this fast moving channel every second! This is the equivalen to 26,000 U.S. gallons flowing by per second or 3 tanker trucks racing by per second... The 12 June 2018 thermal image shows that after ca. 2,5 miles the wide lava flow channel changes into a braided flow for ca 2,5 miles before turning east ward into a single, narrower channel. At Four Corners, the ‘a‘a flow appears to be channelising as well, transporting lava more efficiently through the area before pushing it into the mile wide flow at Kapoho.
On Tuesday evening 12 June, HVO/USGS reported the presence of two prominent ocean entries creating vigorous steam plumes, but during the Wednesday morning 13 June overflight there were observations of a only one towering steam plume from a single focused ocean entry point. Offshore from where lava enters the ocean, areas of upwelling continue to be sighted but are now more dispersed than first sighted.
Pele's hair and other lightweight volcanic glass fragments from the lava fountain at Fissure 8 continue to fall downwind of the fissure, dusting the ground within a few hundred meters (yards) of the vent. The only other active vents are fissures 16 and 18 which continue to ooze lava through intermittently spattering and small lava flows. (HVO/USGS)
Below you find the link to Bruce Omori’s incredible photographs of the perched lava channel and ocean entry from his Kilauea's east rift zone overflight on Tuesda morning, June 12, 2018:
Kilauea volcano update: Summit caldera: continued inward slumping of Halema’uma’u crater and seismic cycles
Thursday, Jun 14, 2018
Day by day, Kilauea’s summit caldera continues to subside and Halema‘uma‘u crater keeps crumbling with every explosive event. Over the past week, such explosions occurred once per day and have been registered as magnitude 5+ earthquakes. They are however not typical earthquakes at all since there is no major fault-rupturing event. Instead, pressure builds up beneath the rubble pile that is choking the conduit and is released as an explosion – a continuous seismic cycle. ... [details]
Wednesday, Jun 13, 2018
Kilauea volcano update: Kilauea's lower East Rift Zone eruption continuous with vigorous fountaining from fissure 8 and lava flowing into the ocean at former Kapoho Bay
Tuesday, Jun 12, 2018
Kilauea’s eruption in the lower East Rift Zone continues without showing any signs of weakening. The current activity has been sustained for 38 days now, 2 days longer than the last fissure eruption that occurred in this area in 1960. However, compared to the rapid change of activity locations and advancing lava flow fronts, the eruption seems to have geographically settled for the past week. ... [details]
Tuesday, Jun 12, 2018