Images

USGS Hawaiian Volcano Observatory staff, September 2018.

In mid-July 2018, fissure 8 (shown here) on Kīlauea Volcano's lower East Rift Zone was emitting more than 50,000 tons of sulfur dioxide gas per day, creating high levels of vog on the island. Since early August, lower East Rift Zone SO₂ emissions have dropped to less than 100 tons per day, resulting in better air quality for Hawaii.

At Kīlauea's summit today, a clear morning gave way to heavy rain, which re-mobilized the ash cover between HVO and the Southwest Rift Zone, concentrating the ash in washes.

The fissure 8 lava channel remains inactive and continues to cool.

Kīlauea Volcano’s summit, seen here from the northeast rim of the caldera, has remained quiet, with no collapse events since August 2. It remains too soon to tell if this diminished activity represents a temporary lull or the end of summit collapses.

Close view of the Pohoiki boat ramp during this morning's overflight. The southern-most flow margin has not advanced significantly toward the Pohoiki boat ramp, but black sand and larger fragments from the entry areas have washed ashore to create a sand bar and beach at this site.

Aerial view of the fissure 8 cone and spillway captured by Civil Air Patrol during their overflight on August 7, 2018. View is toward the south.

This aerial view of the western part of Kīlauea Volcano's caldera was taken on August 6, 2018. The down-dropped block is faulted about 120 m (400 feet) below the caldera floor. Many 19th-century lava flows are exposed in the fault scarps. Halema‘uma‘u (not visible) is to the left of this photo.

A USGS gas geochemist and colleagues from the United Kingdom carry multi-gas sensors as they approach the degassing fissure 8 cone during Kīlauea Volcano's 2018 eruption.

Early morning photo of Halema‘uma‘u, taken from the northeastern caldera rim.

Lava in the fissure 8 channel spillway was fairly low this morning, with the lava in the channel moving at a fairly low velocity.

During the first two weeks of Kīlauea Volcano's 2018 lower East Rift Zone eruption, fissures were characterized by low eruption rates and small flows. This was because the erupted lava originated from pockets of cooler, less fluid magma stored in the rift zone.

This view across the summit caldera shows ground cracks (center) just north of Halema‘uma‘u. Rockfalls within the crater and along the caldera walls continue to stir up dust that can be seen here rising above the caldera rim.

The south edge of the lava flow showed no incandescence this morning and remained less than 0.1 miles from the Pohoiki boat ramp in Isaac Hale Park. The main ocean entry area was still in the Ahalanui area.

The fissure 8 vent (far distance, upper right) continues to feed an active lava channel on Kīlauea Volcano's lower East Rift Zone, shown here on July 26, 2018.

Nighttime view of fissure 8 lava as it exits the vent and feeds into the channel.

Edge of the Kīlauea vog plume near Waikoloa Village on the west side of Hawai‘i Island as it is blown by trade winds across the island and toward the Pacific Ocean. For more information on sulfur dioxide emissions and vog, see https://vog.ivhhn.org/.

View of growing Halema‘uma‘u from the southeast side of Kīlauea Crater.

This Hawai‘i County Fire Department aerial image shows Kapoho Crater with the most active branch of the fissure 8 lava channel now to the west (right) of the cone and feeding a robust ocean entry.

USGS scientists captured this stunning aerial photo of Halemaumau and part of the Kīlauea caldera floor during a helicopter overflight of Kīlauea's summit on July 13, 2018.

In this aerial view looking to the north, a robust ocean entry plume can be seen rising from just offshore of Ahalanui Beach Park, which was inundated with lava yesterday.