HAWAIIAN VOLCANO OBSERVATORY DAILY UPDATE U.S. Geological Survey Wednesday, December 17, 2014 9:02 AM HST Activity Summary: Kīlauea #Volcano continues to erupt at its summit and within its East Rift Zone. A lobe of lava remains active and advanced ~200 m (~220 yds) since yesterday according to Civil Defense. The leading edge of this lobe is approximately 1.4 km (0.9 miles) above the intersection of Pāhoa Village Road and Highway 130, near the Pāhoa Marketplace. No significant tilt has been observed at #Kīlaueas summit or at Puʻu ʻŌʻō since yesterdays report. June 27th Lava Flow Observations: HVO, along with Civil Defense, is monitoring a flow lobe that branches off the west edge of the flow field below the crack system. Civil Defense reported, this morning, that the leading edge of the flow was about 1.4 km (0.9 miles) upslope from the intersection of Pāhoa Village Road and Highway 130, near the Pāhoa Marketplace. Yesterday, #HVO scientists on-site observed that the active lobe had widened somewhat, and had turned slightly to the north at a point where the steepest-descent path turns sharply east. This path, however, would rejoin a steepest descent tributary that would still direct the flow towards the intersection of Pāhoa Village Road and Highway 130, in the vicinity of the #Pāhoa Marketplace. In addition to this active lobe, a breakout from the lava tube on December 5, about 2.6 km (1.6 mi) from Puʻu ʻŌʻō remains weakly active. Puʻu ʻŌʻō Observations: Tilt trend at Puʻu ʻŌʻō shows no significant change during the last day. All other monitoring data indicate no significant changes at Puʻu ʻŌʻō. Seismic tremor is low and steady, and webcams revealed no strong variations in the pattern of glow from degassing vents or the configuration of the crater floor. GPS-measured deformation across the cone has shown no net extension nor contraction since July. The most recent measurement of sulfur dioxide emissions from the East Rift Zone was about 310 tonnes per day on December 11, 2014. Summit Observations: No significant change in ground tilt has been observed in the past 24 hours. The summit #lava lake showed the usual fluctuations associated with changes in spattering behavior, which are also manifested as variations in tremor amplitudes. Small amounts of particulate material were carried aloft by the plume. The average emission rate of sulfur dioxide was 4,100 tonnes/day for the week ending on December 9.
Posted on: Wed, 17 Dec 2014 19:13:06 +0000
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