Photo and Video Chronology - Kīlauea - July 18, 2018

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Kīlauea lower East Rift Zone eruption

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The fissure 8 cone (right) and proximal lava channel were partially obscured by volcanic gas emissions this morning. In concert with surges in the eruptive activity, lava levels were fluctuating over periods of about five minutes. Deposits of tephra (airborne lava fragments, such as Pele's hair) blanket the foreground area.

(Public domain.)

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An increase in lava supply overnight produced several lava channel overflows that threatened homes on Nohea street in the Leilani Estates subdivision; farther downstream, lava overflowed both sides of the channel. By mid-morning, the overflows had stalled (flow shown here). For scale, a person's leg and boot are just visible on the right center edge of this photo.

(Public domain.)

 

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Several lobes of fissure 8 lava are entering the ocean along a broad front, with the southwestern edge of the entry shown here. The southern margin of the lava flows was about 700 m (0.4 mi) from the Pohoiki boat ramp this morning.

(Public domain.)

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As of this morningʻs overflight around 6:00 a.m. HST, the south-westernmost portion of the ocean entry was adjacent to a surf spot known as "Bowls and Shacks."

(Public domain.)

 

In this July 14, 2018, video captured by the UAS (Unmanned Aircraft Systems) team, lava was erupting from within the 120-foot-high fissure 8 cinder cone built of chilled lava fragments. Lava emerging from the cone was traveling about 13-16 miles per hour, flowing freely over a small set of cascades (rapids) and into a perched channel that was as much as 50 feet above the ground surface. The fissure 8 lava flow channel extends about 8 miles to the active ocean entry. UAS are assisting in the USGS eruption response. Hovering at about 1000 feet above hazardous areas, UAS collect video and images to map lava flow boundaries, track overflows, and help assess channel velocities. UAS can also carry sensors to collect thermal and gas data.

(Public domain.)