# Kīlauea

## Multimedia

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November 22, 2019

### Sampling the water in Halema‘uma‘u - Kīlauea Volcano

USGS Hawaiian Volcano Observatory scientists Frank Younger and Patricia Nadeau talk about sampling the water at the bottom of Halemaʻumaʻu, a crater at the summit of Kīlauea Volcano. The water appeared in July 2019 and has steadily risen since then. On October 26, 2019, an unoccupied aerial system (UAS) was used to collect a sample of the water to investigate its source

October 30, 2019

### Water collected from the lake at the bottom of Halema‘uma‘u

Water collected from the lake at the bottom of Halema‘uma‘u is prepared for laboratory analyses at the USGS California Volcano Observatory. Results thus far reveal chemistry indicative of complex reactions among the water, magmatic gases and Kīlauea's basaltic rocks.

October 30, 2019

### Water collected from the lake at the bottom of Halema‘uma‘u

Water collected from the lake at the bottom of Halema‘uma‘u is prepared for laboratory analyses at the USGS California Volcano Observatory. Results thus far reveal chemistry indicative of complex reactions between the water, magmatic gases, and Kīlauea's basaltic rocks.

October 26, 2019

### Unoccupied Aircraft System is inspected by pilot just before take off

The sampling mechanism (on blue tarp) is prepared and the Unoccupied Aircraft System (UAS) is inspected just before take off to collect water from the Halema‘uma‘u crater lake. Brightly colored flagging tape tied to a cable attached to the UAS indicated depth as the sampling tool was lowered into the water.

October 26, 2019

### Unoccupied Aircraft System returning with a water sample.

USGS-HVO scientists and DOI UAS team members collect samples of water from the Halema‘uma‘u crater lake.

October 26, 2019

### HVO scientists prepare UAS for Kīlauea summit crater lake sampling

USGS Hawaiian Volcano Observatory and DOI Office of Aviation staff prepare the sampling mechanism (on blue tarp) and inspect the Unmanned Aircraft System (UAS) just before it took off to collect water from the Halema‘uma‘u crater lake. Brightly-colored flagging tape tied to a cable attached to the UAS indicated depth as the sampling tool was lowered into the water. The

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October 3, 2019

### Geophysicist Sarah Conway, USGS HVO geophysicist

Geophysicist Sarah Conway, a member of the USGS Hawaiian Volcano Observatory's deformation team, readies a temporary GPS station during a campaign survey of benchmarks on Kīlauea Volcano to monitor changes in the ground surface.

September 27, 2019

### Water appears in Halemaʻumaʻu - Kīlauea Volcano

USGS Hawaiian Volcano Observatory scientists Matt Patrick and Jim Kauahikaua talk about the water that appeared at the bottom of Halemaʻumaʻu, a crater at the summit of Kīlauea Volcano, in July 2019 and continues to rise today. They address why it appeared, how it’s monitored, and its potential hazards.

August 18, 2019

### Water pond in Halema‘uma‘u 8-18-19

Water pond in Halema‘uma‘u August 18, 2019. The water level continues to slowly rise in Halema‘uma‘u, drowning many of the small rocks that were previously exposed in the center of the pond. Ripples across the water surface were evident today. The color of the water ranged from semi-translucent blue to opaque green-yellow in the western part of the pond.

August 11, 2019

### Aerial view of the Halema‘uma‘u water pond

The ponded water at the bottom of Halema‘uma‘u has continued to slowly rise. This wide view shows much of Halema‘uma‘u and the fumaroles on the upper walls of the pit.

August 9, 2019

### Close-Up of Ponded Water at Halemaumau

This video shows a close-up of the ponded water at the bottom of Halema'uma'u. Yesterday, the separate ponds joined into a single elongate pond. The water level has continued to slowly rise.

August 8, 2019

### What does water in Halema‘uma‘u mean

These images look east at the pond within Halema‘uma‘u on August 8 and 14, 2019. The pond widened mainly toward the south (right). The north-south width of the pond on August 14 was about 32 m (105 ft), about 10 m (35 ft) wider than on August 8. The pond has widened and deepened slowly and steadily rate since measurements began on August 3.