Kilauea , Hawai : the summit lava lake level rose slightly overnight.

Kilauea , Hawai : the summit lava lake level rose slightly overnight.

Activity Summary:
Kilauea continues to erupt at both the summit, where there is a circulating lava lake, and from its East Rift Zone, where surface lava flows are active northeast of the Pu’u ‘O’o vent. The East Rift Zone lava flow currently poses no threat to nearby communities. The summit inflationary trend continued during the past 24 hours; earthquake rates and seismic tremor have not changed significantly in the past day.

Summit Observations:
Summit tiltmeters continued to record an inflationary trend during the past several days, and the summit lava lake level rose slightly overnight. Between April 8 and 12, the lake level rose about 22 m (72 ft); when measured yesterday morning, the level was 35 m (115 ft) below the floor of Halema’uma’u Crater. Last week’s 4-day long summit deflationary period interrupted the longer-term inflationary trend of the summit, similar to previous deflation events. Seismic activity across the volcano has not changed significantly during the past day. Fluctuations in summit tremor amplitudes are related to spattering along the edges of the lava lake. The average sulfur dioxide emission rates during the past week ranged between 1,800 and 1,200 metric tons/day; the most recent average emission rate on April 12 was 1,200 metric tons/day.

Pu’u ‘O’o Observations:
There were no observable changes at Pu’u ‘O’o during the past day. Outgassing continues from the spatter cones on the crater floor. A tiltmeter on the north flank of Pu’u ‘O’o continued to record slight inflationary tilt during the past day. For the past several months, GPS instruments that span Pu’u ‘O’o had shown the cone was spreading, which suggests the magma system beneath the vent was pressurizing; last week’s deflationary trend has interrupted this longer term trend. The sulfur dioxide emission rate from all East Rift Zone vents was about 300 metric tons/day when last measured on April 6.

June 27th Lava Flow Observations:
The webcam shows small breakouts scattered northeast of Pu’u ‘O’o, where they have been occurring for the past several months. This observation was confirmed by a field crew visiting the flow field yesterday, witnessing very minor expansion of the northern edge of the flow field since the last visit weeks ago. A satellite image from April 3 showed the most distal of these breakouts was 7.6 km (4.7 mi) northeast of Pu’u ‘O’o.

14/04/2016. Kilauea , Hawai :

19°25’16” N 155°17’13” W,
Summit Elevation 4091 ft (1247 m)
Current Volcano Alert Level: WATCH
Current Aviation Color Code: ORANGE

 

Source : HVO

Photos : Bruce Omori

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