Images

This small-scale map shows Kīlauea's active East Rift Zone lava flow field in relation to the southeastern part of the Island of Hawai?i. The area of the active flow field as of January 12 is shown in pink, while widening and advancement of the active flow as of February 16 is shown in red. Older Pu‘u ‘Ō‘ō lava flows (1983-2016) are shown in gray.

Left: Astronauts James A. Lovell, Jr., and Fred W. Haise, Jr., members of NASA's third team of moon explorers, carried cameras, communications equipment, and an Apollo Lunar Hand Tools scoop during a simulation of a lunar traverse at Kīlauea Volcano in December 1969.

Today, Kīlauea Volcano's summit lava lake level was 21 m (69 ft) below the vent rim. A long stretch of active spattering was visible along the east lake margin from the rim of Halema‘uma‘u Crater, an area that remains closed to the public due to ongoing hazards. The usual spatter source to the southeast was small by comparison.

HVO's geochemist uses a Fourier Transform Infrared Spectrometer (FTIR) instrument to track volcanic gases emitted from the lava lake with Halema‘uma‘u Crater. These measurements help detect changes in gas composition, which can provide insight into the inner workings of Kīlauea Volcano.

USGS Hawaiian Volcano Observatory office building is located on the rim of Kīlauea Caldera in Hawai‘i Volcanoes National Park.

VIDEO: Kīlauea Volcano's Kamokuna ocean entry. Today, the "firehose flow" could be clearly seen from the public lava viewing area, 800 meters (about one-half mile) east of the ocean entry, in Hawai‘i Volcanoes National Park.

The gentle slope of Mauna Loa as seen from the flanks of Mauna Kea to the north. Younger lava flows appear dark on the volcano's flank, and clouds rest in the eastern saddle between the two volcanoes.

The hot crack near the sea cliff, in the immediate area of the ocean entry, has widened significantly over the past four days. On Saturday, January 28, the crack was 30 cm wide (1 foot). Today, HVO geologists in protective gear briefly entered the area and measured the crack as being 75 cm (2.5 feet).

Due to the instability of the sea cliff above the ocean entry and other hazards created by molten lava flowing into the sea, Hawai‘i Volcanoes National Park has established a viewing area (noted by yellow arrow in photo) from which the ocean entry can be seen in relative safety.

Using a thermal image of the crack above Kīlauea volcano's ocean entry (steam from lava flowing into the sea is visible at the top of the left photo), HVO geologists determined that the temperature within the eastern end of the crack is up to about 220 degrees Celsius (428 degrees Fahrenheit).

At Kīlauea's ocean entry on Jan. 28 and 29, the interaction of molten lava flowing into cool seawater caused pulsating littoral explosions that threw spatter (fragments of molten lava) high into the air. Some of these incandescent clasts fell on top of the sea cliff behind the ocean entry, forming a small spatter cone.

Kīlauea Volcano's summit lava lake level typically rises and falls in concert with summit inflation and deflation, as shown by these two HVO webcam images. The left image was captured a week ago (on Jan. 17, 2017), when the lava level was 52.5 m (172 ft) below the vent rim, the lowest level measured since April 8, 2016. The right image, captured this morning (Jan.

This video clip of Kīlauea Volcano's summit lava lake shows spattering along the southeast margin of the lake.

This telephoto image from January 19, 2017, shows spattering along a down-welling section of Kīlauea Volcano's summit lava lake. The main area of spattering was about 10 m (32 ft) high, but some lava fragments were thrown even higher.

The summit lava lake within Halema‘uma‘u Crater today (Jan. 15, 2017) was about 50.5 m (166 ft) below the crater floor (vent rim). One of the most interesting things exposed by the lower lake level was the clear view of the thick, dark veneer of lava on the eastern vent wall (close-up shown below).

This panoramic view of the 1935 Humu‘ula flow (black lava) on both sides of the Daniel K. Inouye Highway, which runs east to west in the saddle between Mauna Loa (snow-capped shield volcano at far left) and Mauna Kea (distant right), was taken from the top of Pu‘uhuluhulu. View is to the northwest. The top of Hualālai is visible in far distance (center).

A tiltmeter on the south flank of Kīlauea volcano flooded with water. The tiltmeter casing is less than a foot in diameter. USGS photo. 

The HVO dual vacuum set up used to extract wet sand from flooded tiltmeter casings. USGS photo. 

On May 24, 2016, two new flows broke out on the flanks of the Pu‘u ‘Ō‘ō cone on Kīlauea Volcano's East Rift Zone. The silvery sheen of new lava erupting from the northern 61f breakout (center) and eastern 61g breakout (upper left) stands out in contrast to the older flows on and around Pu‘u ‘Ō‘ō (right).

A past assumption about pumice deposits on Kīlauea Volcano has recently been proven wrong. In this photo, the eastern pumice (EP) can be seen above the golden pumice (GP), with stream deposits between the two. Photo courtesy of Sebastien Biasse, University of Hawai‘i at Mānoa.

A young 'ua'u exercises its wings in preparation for its first flight directly out to sea. The 'ua'u, or Hawaiian petrel, is a federally endangered native seabird that nests at high elevations on Mauna Loa volcano.