July 13: Hawai’i Has a New Island (For Now)

July 13, 2018. USGS: “A tiny new island of lava has formed on the northernmost part of the ocean entry. During this morning’s overflight, HVO’s field crew noticed the island was oozing lava similar to the lava oozing from the broad flow front along the coastline.” (Full-sized)
Today’s Eruption Summary

Fissure 8’s lava flow has settled into its new course, turning right just before Kapoho Cone and proceeding south-southeast to the ocean in a strong channelized a’a flow. Some lava, apparently following the earlier paths (lava tubes, maybe?) to the sea, is still squeezing out of the broad 6km (3.7) mile lava delta to the north of the new ocean entry.

A fascinating footnote: while the northern “ooze-outs” are weakening, a tiny lava island popped up just offshore of them last night, and it is itself oozing lava:

July 13, 2018. USGS: “A closer view of the new “island,” which was estimated to be just a few meters offshore, and perhaps 6-9 meters (20-30 ft) in diameter. It’s most likely part of the fissure 8 flow that’s entering the ocean—and possibly a submarine tumulus that built up underwater and emerged above sea level.” (Full-sized)

Fissure 22 has stopped spattering. However, many inactive fissures were steaming today, “possibly due to the increasing humidity in the area.”

Today’s summit collapse occurred at 7:06pm HST, with the energy equivalent of a 5.3 earthquake, as usual. HVO is setting up a new livestream from Volcano House, but it’s not fully operational yet, so we made do with the ailing HVO webcam today (video clip).

July 13, 2018. USGS: “View of Halema‘uma‘u and Kīlauea caldera just before 8:00 a.m. HST today, as seen from HVO’s observation point near Volcano House. Gusty winds were blowing quite a lot of rock-fall dust, visible both within and along the rim of the crater.” (Full-sized)

It’s been fascinating watching geologists collect data, figure things out, and incorporate these discoveries into their daily Kilauea alerts. Just as the HVO team  started predicting the summit’s cyclical collapse/explosions, now they’ve started predicting (or at least watching for) Fissure 8’s lava surges and possible spillovers a few hours after each summit collapse. Sure enough:

Also, we’ve got a new view of ever-expanding Halema’uma’u Crater in Kilauea’s summit caldera this morning:

July 13, 2018. USGS: “USGS scientists captured this stunning aerial photo of Halema‘uma‘u and part of the Kīlauea caldera floor during a helicopter overflight of Kīlauea’s summit this morning. In the lower third of the image, you can see the buildings that housed the USGS Hawaiian Volcano Observatory and Hawai‘i Volcanoes National Park’s Jaggar Museum, the museum parking area, and a section of the Park’s Crater Rim Drive. Although recent summit explosions have produced little ash, the drab gray landscape is a result of multiple thin layers of ash that have blanketed the summit area during the ongoing explosions.” (Full-sized)

I couldn’t find a comparable aerial photo with the observatory and Jaggar in shot, but this 2009 photo of Halema’uma’u is facing in approximately the same direction. (Look for Crater Rim Rd behind the crater on the left, and note the parking lot obscured by the lava lake’s plume in 2009— lava lake, parking lot, and part of that road collapsed into the crater in June.)

Continue reading July 13: Hawai’i Has a New Island (For Now)