Showing posts with label Tephra. Show all posts
Showing posts with label Tephra. Show all posts

Wednesday, May 30, 2018

What’s going on with the Kilauea Volcano?


Fissure 8 was active throughout Tuesday and into Wednesday morning sending fountains of lava at a sustained height of 200 feet with multiple secondary fountains that reached 60-feet.

This increased activity continued feeding a lava flow that moved towards Highway 132 at the rate of approximately 600 yards/hour. The flow moved north of Highway 132 in the vicinity of Noni Farms and Halekamahina roads, advancing along the steepest descent path that could take the flow to the Four Corners area.

Adding on to yesterday’s eruption, flow from fissure 18 increased further moving downslope toward Highway 137 at rates of less than 100 yards per hour. Overnight, sporadic bursts of activity were also observed from Fissures 7 and 15.

Pele's hair and other lightweight volcanic glass from high fountaining of Fissure 8 are falling to the west of the fissure and continue accumulating on the ground within Leilani Estates. Winds may waft lighter particles to greater distances. Residents are urged to minimize exposure to these volcanic particles, which can cause skin and eye irritation similar to volcanic ash.

On the other hand, Kīlauea Volcano Summit saw relatively few activities on Tuesday and into Wednesday. Ash continued to erupt intermittently from the vent within Halemaʻumaʻu crater, but vertically high ash plumes were not recorded.

USGS warns that explosive events that could produce minor amounts of ash fall downwind are possible at any time. Volcanic gas emissions at the summit remain high and will combine with wind conditions to produce widespread vog across the Island of Hawaii on Wednesday.


Kīlauea Lower East Rift Zone Fissures and Flows, May 29, 6:00 p.m. HST. Shaded purple areas indicate lava flows erupted in 1840, 1955, 1960, and 2014-2015.
Map Courtesy USGS - Hawaiian Volcano Observatory



Tuesday, May 29, 2018

Fissure 8 reactivated to create 200-feet high lava fountains


Lava eruption and gas emission continue unabated from the lower East Rift Zone (LERZ) fissure system in the area of Leilani Estates and Lanipuna Gardens. Today, fissure 8 remained very active, at times fountaining to the height of 200-feet. The lava flowed atop the Fissure 8 ʻaʻā flow that was active Sunday night/Monday morning to cross the highway 132 just before 2 pm HST Tuesday.

This voluminous activity of fissure 8 has produced Pele's hair and other lightweight volcanic glass that is being transported downwind and falling to the west of the fissure.

Tuesday also saw weak activity at fissure 18 and 19, but fissure 18 eruption has created a lava channel which has advanced 1.6 miles towards the coast.

Ash and gas eruption are continued from the summit, while ocean entry of lava has diminished significantly as viewed from this overflight photo.




Tephra (airborne lava fragments) erupted by the high lava fountains of fissure 8 was carried downwind, where the frothy rock fragments fell on Leilani Street, just past Kupono Street, in the Leilani Estates subdivision. Courtesy: USGS

Here is a video of fissure 8 reactivation