Images

Steep walls, collapsed blocks, and rubble border Halema‘uma‘u Crater and Kīlauea's growing summit crater lake. In this photo, looking northwest, the summits of both Kīlauea (foreground) and Mauna Loa (background) are visible. USGS photos by K. Mulliken

This series of maps compares aerial imagery collected prior to Kīlauea's 2018 summit collapse and the "Geologic Map of the Summit Region of Kīlauea Volcano, Hawaii" (Dutton and others, 2007; Neal and others, 2003)—created before Kīlauea's 2018 summit collapse—with aerial imagery collected after the 2018 summit collapse and a preliminary update to Kīlauea's summit ge

May 2020 earthquake swarm at Lōʻihi seamount

_{A map of the lower East Rift Zone of Kīlauea Volcano showing the fissures and flow fields from the 1955 (blue) and 2018 (pink) eruptions. Portions of the 1955 lava flows that were covered during the 2018 eruption, are represented with a blue outline.}
 

HVO technician inspects power/communication station at Pu‘u ‘Ō‘ō on on April 16, 2020. USGS photos by F. Younger.

View of the recently cleared Boiling Pots on the Wailuku River in Hilo. The pots, each about 15 m (50 ft) in diameter, are eroded into a 10,000 year old Mauna Loa lava flow. When the water is low, the river does not flow over some of the pot rims but it continues to flow through them.

Clear weather allowed HVO geologists to make observations and take measurements of the water pond at Kīlauea's summit. No major changes were observed, and the water level continues to slowly rise. Note the former HVO observation tower can be seen above the geologist's helmet. 

Example 2-hours of seismic data from station near Mauna Kea on April 14, 2020. The large spikes are earthquakes under Mauna Kea repeating every ~11 minutes. Bottom waveform zooms in on 15 seconds of an individual event.

This section of brown Icelandic soil (top) contains 800 years of ash deposits erupted from five different volcanoes. The black layers, 5-10 cm (2-4 in) thick, are from Katla Volcano. A white arrow points to a closeup of the 1755 Katla ash deposit (lower left).

Scanning electron microprobe images show the complexity of tiny Icelandic ash grains (150 micron, or 0.006 inch). Image (a) shows a dense and blocky grain, and (b) shows a foamy grain.

A U.S. Army Air Corps biplane is prepared for a mission to drop bombs on a lava flow advancing toward Hilo during the Mauna Loa 1935 eruption.

Aerial view of a bomb detonating on Mauna Loa near the source of the 1935 Humu‘ula lava flow on the morning of December 27, 1935. This was one of 20 demolition bombs dropped on the lava flow that morning by the Army Bombing Squadron from Luke Field, O‘ahu.

USGS Hawaiian Volcano Observatory scientists examine an outcrop of reddish-brown Hilo ash during a recent study to investigate the origins of volcanic ash deposits on the Island of Hawai‘i. Age dates of lava flows above and below the Hilo ash deposit indicate that the ash was erupted between 3,000 and 14,000 years ago. 

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. 

Geophysicist Brian Shiro, manager of the USGS Hawaiian Volcano Observatory's seismic network, was part of HVO's team that installed several new stations on Kīlauea Volcano's lower East Rift Zone to monitor earthquakes during the 2018 eruption.

_{This Portulaca sclerocarpa (‘Ihi mākole) individual (center) surrounded by invasive grass species is a critically endangered plant. The small metal tag to the right notes the plant's permanent identification number for long-term monitoring purposes.}

Retired USGS botanist Linda Pratt, USGS research geologists Patricia Nadeau and Jennifer Lewicki, and USGS chemist Tamar Elias (left to right) are part of a team investigating a critically endangered succulent plant, Portulaca sclerocarpa, in Hawai‘i Volcanoes National Park's Puhimau thermal area.

As fissure 8 erupts on Kīlauea Volcano's lower East Rift Zone in June 2018 (left), a Fourier Transform Infrared (FTIR) spectrometer measures gas emissions from the lava fountains. At right, Hawaiian Volcano Observatory gas geochemistry team members collect a sample of gas from Sulphur Banks in Hawai‘i Volcanoes National Park.

After days of rain, a window of clear weather allowed HVO geologists to make observations and take measurements of the water pond at Kīlauea's summit on January 17, 2020. No major changes were observed, and the water level continues to slowly rise. 

A close-up view of the Kilauea pond shows the color variations across the surface, and sharp boundaries among zones of different color.

After a sample was collected, HVO team members transferred water from the sampling device to plastic bottles. Team members took notes, measured water pH and evaluated water temperature data for each sample collected.