News Update: Hawaii’s Kilauea Volcano Raises Two New Explosions (TTM)
Overnight, there were two explosions at the volcano’s summit. The first, smaller event occurred at 12:46 AM. Following this event, seismicity did not significantly drop off and a second explosion occurred at 4:43 AM. This event was larger than the first and was more typical of the size of events that have been occurring at the summit over the past week. Inward slumping of the rim and walls of Halema`uma`u continues in response to ongoing subsidence at the summit.
Sulfur dioxide emissions from the volcano’s summit have dropped to levels that are about half those measured prior to the onset of the current episode of eruptive activity. This gas and minor amounts of ash are being transported downwind, with small bursts of ash and gas accompanying intermittent explosive activity.
The three closely spaced lava fountains at Fissure 8 are erupting with a slightly lower maximum heights of 115-130 feet. Lava continues to be fed into the channelized flow trending north and then east to a single ocean entry at Kapoho. Weak lava activity at Fissures 16/18 was observed last night. This morning’s overflight confirms that fountaining continues at Fissure 8 and that its channel is nearly full with no spillovers. Minor steam explosions were observed at the ocean entry.
On Saturday, June 9, 2018, USGS–Hawaiian Volcano Observatory scientists installed additional continuous GPS stations around Halema‘uma‘u. These stations will allow scientists to better monitor and measure the ongoing subsidence of Halema‘uma‘u and the adjacent caldera floor.
Cracking and slumping of the Halema‘uma‘u crater walls are clearly evident in this aerial view captured during the HVO overflight on June 9. Steam plumes have been rising from within the crater, as well as from cracks adjacent to the crater. The last measurement taken of the longest dimension of the crater was about 1.8 km (1.1 mi) across, which is nearly twice as large as it was before explosions began on May 17, 2018.
The overflight is along the eastern rim, flying from south to north
Field crews conduct a helicopter overflight of the braided lava channel in Kīlauea Volcano’s lower East Rift Zone on June 11, 2018, around 6:30 AM, looking for spillovers. The three closely spaced lava fountains at Fissure 8 continue to feed a channelized flow trending north and then east to the ocean entry at Kapoho. Very minor spillovers are occurring at multiple places along the channel but have uniformly been short lived and are not threatening areas that were not previously covered by
CREDIT – USGS