HAWAIIAN VOLCANO OBSERVATORY DAILY UPDATE U.S. Geological Survey Friday, January 16, 2015 9:16 AM HST Activity Summary: #Kīlauea #Volcano continues to erupt at its summit and within its East Rift Zone. In the East Rift Zone, the tip of the June 27th lava flow remained stalled, but breakouts up slope of the front continued to advance down slope. One of these breakouts advanced about 45 m (50 yd) since yesterday morning and is near the former, stalled front according to a Civil Defense assessment this morning. June 27th Lava Flow Observations: The flow that advanced toward Pahoa Marketplace in past weeks remained stalled approximately 800 m (0.5 miles or 880 yards) from the intersection of Highway 130 and Pāhoa Village Road, however, several breakouts are active advancing downslope. The lobe that recently broke out about 700 m (765 yd) upslope of the stalled tip had advanced about 350 m (380 yd) from January 13th to January 15th, and another 45 m (50 yd) from the 15th to the morning, according #Hawaii County Civil Defense. On Tuesdays overflight, #HVO scientists observed additional breakouts scattered from 1.7 to 3 km upslope of the flow tip, and the long, narrow lobe moving north-northeast in this area was active. This lobe had advanced about 45 m/day (50 yd/day) during the previous week. It is in a drainage area leading to the steepest-descent path that crosses Highway 130 about 1 km (0.6 mi) south of the #Makuʻu Farmers Market. Views of this flow have recently been obscured by smoke from brush fires sparked by the #lava flow, but on Tuesday, it was still about 3.3 km (2.1 mi) from Highway 130 and moving slowly. Small breakouts were also active in an area of persistent activity in the crack system near the True/Mid-Pacific #geothermal well pad about 7 km (4 mi) upslope from #Pāhoa. A camera on the north rim of Puʻu ʻŌʻō cone recorded another breakout close to, and north-northeast of Puʻu ʻŌʻō that started early yesterday morning. This is in an area where there were persistent breakouts during December 2014 through early January 2015 Puʻu ʻŌʻō Observations: Since yesterday morning, the tiltmeter on the north flank of Puʻu ʻŌʻō cone continued to record the very weak inflation that has been observed over the past 6+ days, however, that may have stopped early this morning. All other monitoring data indicated no significant changes at Puʻu ʻŌʻō, except for the breakout near the north flank of the cone. The most recent measurement of sulfur dioxide emissions from all East Rift Zone vents was about 200 tonnes per day on January 7. Summit Observations: No significant net tilt was recorded at the summit since yesterday morning. The summit lava lake displayed minor lava level fluctuations associated with changes in spattering behavior, which are also manifested as variations in tremor amplitudes and gas release. Small amounts of particulate material were carried aloft by the plume. The emission rate of sulfur dioxide ranged from around 4,500 to 7,600 tonnes/day during the week ending January 13.
Posted on: Fri, 16 Jan 2015 19:49:32 +0000
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