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Time-lapse movie of Halemaumau overlook vent

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Time-lapse thermal image movie of Halemaumau overlook vent

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Time-lapse movie of the Peace Day Flow area

Numerous ocean entry points were active Monday (April 8) at Kupapaʻu, with a plume of discolored water drifting west. Photo courtesy of USGS/HVO

Another view of the ocean entry points and discolored water at Kupapaʻu. The thermal camera today showed that water surface temperatures were up 50 degrees Celsius (122 degrees Fahrenheit) a short distance out from the entry points. Just beyond the ocean entry, the light colored areas represent active breakouts. On the pali, fume marks the path of the lava tube. The bump on the horizon at the very left edge of the image is Puʻu ʻŌʻō, the site of the vent for these flows. Photo courtesy of USGS/HVO

View looking northeast towards Kalapana from the ocean entry. The small white dots in the distance are houses in Kalapana Gardens subdivision. Photo courtesy of USGS/HVO

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

A lava lake within the Halema`uma`u Overlook vent produced nighttime glow that was visible from the Jaggar Museum overlook and via HVO’s Webcam during the past week. The lake level was relatively steady over the past week due to the lack of deflation-inflation cycles, and was roughly 50 m (160 ft) below the floor of Halema`uma`u.

On Kilauea’s east rift zone, breakouts from the Peace Day tube remain active above the pali and on the coastal plain. Small ocean entries are active on both sides of the Hawai`i Volcanoes National Park boundary. In addition, the Kahauale`a flow, fed directly from a spatter cone on the northeastern edge of Pu`u `OÊ»o’s crater floor, continues to advance very slowly toward the northeast across a plain of 1980s-era `a`a flows. The flow had traveled about 4.9 km (3 miles) when last measured on April 8.

There were several felt events across the State of Hawaii in the past week. On April 4 at 6:11 p.m., a magnitude-2.7 earthquake occurred 6 km (4 mi) west of Kailua-Kona at a depth of 11 km (7 mi). On April 5 at 6:06 p.m., a magnitude-2.8 earthquake occurred 18 km (11 mi) southeast of Waimea at a depth of 22 km (14 mi). On April 6 at 9:44 p.m. a magnitude-2.6 earthquake occurred 8 km (5 mi) south of Honoka’a at a depth of 13 km (8 mi). On April 11 at 04:27 a.m., a magnitude-2.6 earthquake occurred 50 km (25 mi) east of Kailua, O`ahu, at a depth of 10 km (6 mi). Also on April 11 at 7:25 a.m., a magnitude-3.3 earthquake occurred 15 km (9 mi) southeast of Volcano Village at a depth of 7 km (4 mi).

Visit the HVO Web site (http://hvo.wr.usgs.gov) for Volcano Awareness Month details and Kilauea, Mauna Loa, and Hualalai activity updates, recent volcano photos, recent earthquakes, and more; call (808) 967-8862 for a Kilauea summary; email questions to askHVO@usgs.gov.

The two active flows (Kahaualeʻa and Peace Day) are both fed from vents high on Puʻu ʻŌʻō cone. This view (looking southwest) shows Puʻu ʻŌʻō crater. In the foreground, a lava pond and small spots of orange glow mark the location of the vent for the Kahaualeʻa flow. Near the north rim of the crater (right) a steep spatter cone (see other photo from today) was producing loud gas jetting sounds. Photo courtesy of USGS/HVO

A closer look at the start of the lava tube on the Kahaualeʻa flow, near the rim of Puʻu ʻŌʻō crater. See photo above for aerial view. Unfortunately a direct view of the lava stream was not available here. Photo courtesy of USGS/HVO

This steep spatter cone near the north rim of Puʻu ʻŌʻō crater was making loud gas jetting sounds, presumably due to gas forced through the small glowing holes near the top of the cone. Photo courtesy of USGS/HVO

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Time-lapse multi-image movie of Pu‘u ‘O‘o Crater

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Down the flank of Puʻu ʻŌʻō a skylight on the Kahaualeʻa flow provided a view of the flowing lava stream in the lava tube. Photography courtesy of USGS/HVO

Small-scale map showing the active Peace Day flow, carrying lava to the ocean, and the active Kahaualeʻa flow northeast of Puʻu ʻŌʻō, as of April 8, 2013. Widening of both flow fields between March 19 and April 8 is shown in bright red, while the extent of the flow fields before March 19 are shown in pink. Older lava flows are labeled with the years in which they were active. Episodes 1–48b (1983–1986) are shown in gray; episodes 48c–49 (1986–1992) are pale yellow; episodes 50–55 (1992–2007) are tan; and episodes 58–60 (2007–2011) are pale orange. The active lava tubes are shown by the yellow lines. The contour interval for topographic lines shown on Puʻu ʻŌʻō is 5 m.