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Volcano Watch: Kilauea activity update for April 25, 2013

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Time-lapse movie of Halemaumau overlook vent

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Time-lapse thermal image movie of Halemaumau overlook vent

(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 over the past week fluctuated, due to deflation-inflation cycles, and was generally 50-60 m (165-200 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. The Kahauale`a flow is no longer active, it’s front stalling about 5 km (3 mi) northeast from Pu`u `O`o.

There was one felt earthquake in the past week. On Thursday, April 25, 2013, at 2:21
a.m., HST, a magnitude-3.1 earthquake occurred 6 km (4 mi) north of Mountain View
at a depth of 1 km (1 mi).

Visit the HVO Web site (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.

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

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Time-lapse movie of the Peace Day Flow area

Map showing the active Peace Day flow, carrying lava to the ocean, and the inactive Kahaualeʻa flow northeast of Puʻu ʻŌʻō, as of April 23, 2013. Widening of both flow fields between April 8 and April 23 is shown in bright red, while the extent of the flow fields before April 8 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 Peace Day lava tube is shown by the yellow line. The contour interval for topographic lines shown on Puʻu ʻŌʻō is 5 m.

Map showing the active Peace Day flow, carrying lava to the ocean, and the inactive Kahaualeʻa flow northeast of Puʻu ʻŌʻō, as of April 23, 2013. Widening of both flow fields between April 8 and April 23 is shown in bright red, while the extent of the flow fields before April 8 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 Peace Day lava tube is shown by the yellow line. The contour interval for topographic lines shown on Puʻu ʻŌʻō is 5 m.

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