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Volcano Watch: Kilauea activity update for May 1, 2014

20140428_puuoo-ne-spatter-cone-close-t

Time-lapse movie of Halemaumau Crater from HVO (4/24/14-5/2/14)

Time-lapse movie of Halemaumau Crater (4/24/14-5/2/14)

Time-lapse thermal image movie of Halemaumau Crater (4/24/14-5/2/14)

Kīlauea Caldera from HVO (4/24/14-5/2/14)

(Activity updates are written by scientists at the U.S. Geological Survey’s Hawaiian Volcano Observatory.)

A lava lake within Halema‘uma‘u produced nighttime glow that was visible via HVO’s Webcam during the past week. The lake level was relatively high and stable, staying between 30 m (98 ft) and 35 m (115 ft) below the rim of the Overlook crater.

On Kīlauea’s East Rift Zone, the active front of the Kahauale‘a 2 flow was 8.3 km (5.2 miles) northeast of its vent on Pu‘u ‘Ō‘ō when mapped on Monday, April 28. In addition, two other flows, fed from spatter cones on the northern and southern edges of the crater floor, sent small flows toward the north and southeast, respectively. While the fate of northern flow is not known, Webcam images indicated that, as of Thursday, May 1, the southern flow was still active. Poor views precluded views of the Kahauale‘a 2 flow, but it is expected to be active as well.

There were no earthquakes in the past week reported felt on the Island of Hawai‘i.

Map showing the Kahaualeʻa 2 flow in relation to the eastern part of the Island of Hawaiʻi as of April 28, 2014. The most distant active front of the Kahaualeʻa 2 flow was just over 8.3 km (5.2 miles) straight-line distance northeast of Puʻu ʻŌʻō. Two other flows were also active on the flanks of Puʻu ʻŌʻō, each erupting from a different vent. One, fed from a spatter cone on the north side of the crater floor, had advanced about 400 m down the northern flank of Puʻu ʻŌʻō. The other, fed from a spatter cone on the south side of the crater floor, had reached about 500 m southeast of Puʻu ʻŌʻō. The area of the Kahaualeʻa 2 flow as of April 18 is shown in pink, while widening of the flow since then, including the two new flows on Puʻu ʻŌʻō, is shown in red. Older lava flows are distinguished by color: episodes 1–48b flows (1983–1986) are shown in gray; episodes 48c–49 flows (1986–1992) are pale yellow; episodes 50–55 flows (1992–2007) are tan; episodes 58–60 flows (2007–2011) are pale orange, and episode 61 flows (2011–2013) are reddish orange. The active lava tube is shown with a yellow line (dashed where its position is poorly known).

Map showing the Kahaualeʻa 2 flow in relation to the eastern part of the Island of Hawaiʻi as of April 28, 2014. The most distant active front of the Kahaualeʻa 2 flow was just over 8.3 km (5.2 miles) straight-line distance northeast of Puʻu ʻŌʻō. Two other flows were also active on the flanks of Puʻu ʻŌʻō, each erupting from a different vent. One, fed from a spatter cone on the north side of the crater floor, had advanced about 400 m down the northern flank of Puʻu ʻŌʻō. The other, fed from a spatter cone on the south side of the crater floor, had reached about 500 m southeast of Puʻu ʻŌʻō. The area of the Kahaualeʻa 2 flow as of April 18 is shown in pink, while widening of the flow since then, including the two new flows on Puʻu ʻŌʻō, is shown in red. Older lava flows are distinguished by color: episodes 1–48b flows (1983–1986) are shown in gray; episodes 48c–49 flows (1986–1992) are pale yellow; episodes 50–55 flows (1992–2007) are tan; episodes 58–60 flows (2007–2011) are pale orange, and episode 61 flows (2011–2013) are reddish orange. The active lava tube is shown with a yellow line (dashed where its position is poorly known).

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Aug 22, 2014 / 5:16 pm

 

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