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Bogoslof Volcano Erupts

Posted by feww on March 9, 2017

Bogoslof : Large explosive eruption ejects ash 10.6 km (35,000 feet) asl

Bogoslof volcanic ash cloud at 3:15 AM Mar 8 AKST. Cloud at least 35,000 ft asl.
Img by Dave Schneider,


Wednesday, March 8, 2017, 9:10 AM HST (Wednesday, March 8, 2017, 19:10 UTC)

19°25’16” N, 155°17’13” W, Summit Elevation 4,091 ft (1,247 m)
Current Volcano Alert Level: WATCH
Current Aviation Color Code: ORANGE

Activity Summary: Kīlauea Volcano continues to erupt at its summit and at the Puʻu ʻŌʻō vent on its East Rift Zone. The episode 61g lava flow from Puʻu ʻŌʻō is entering the ocean at Kamokuna and is feeding surface flows on and above the pali. These lava flows pose no threat to nearby communities at this time. The summit deflationary trend of the past 2 days reversed early this morning to an inflationary trend. The lava lake was about 34 m (~112 ft) below the Overlook crater rim this morning. Seismicity in the upper East Rift Zone did not change significantly in the past day.

Summit Observations: Tiltmeters at Kīlauea’s summit began recording an inflationary tilt early this morning, reversing the deflationary trend of the past 2 days. The lava lake was measured this morning at about 34 m (~112 ft) below the Overlook crater. Webcam views of the lava lake can be found at this webpage: Summit tremor continues to fluctuate in response to variations in lava lake spattering. Average daily summit sulfur dioxide emission rates were between about 6,600 and 1,900 metric tons/day during the last week in February, the most recent time when conditions permitted measurements. Seismicity in the upper East Rift Zone has returned to typical levels over the past couple of days, with just a few small earthquakes.

Puʻu ʻŌʻō Observations: Webcam images over the past 24 hours show persistent glow at long-term sources at Puʻu ʻŌʻō, including the pit on the west side of the crater that holds a small lava pond. There were no significant changes in East Rift Zone seismicity over the past 24 hours. The tiltmeter at Puʻu ʻŌʻō recorded deflationary tilt over the past day. The sulfur dioxide emission rate from all East Rift Zone vents was about 250 metric tons/day when last measured on February 22, 2017.

Pāhoehoe lava from Kilauea Volcano

Pāhoehoe lava inches towards the ocean in Hawai‘i Volcanoes NP, 3/2/17 Photo/Janice Wei.

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