Images

Steam (white) and volcanic gas (bluish) were visibly emitting from Halema‘uma‘u crater the morning of April 14, 2023, along the eastern wall of the crater. Sulfur dioxide (SO₂) emissions from Kīlauea summit remain low; the most recent SO₂ emission rate of approximately 110 tonnes per day (t/d) was measured on April 5. USGS image by K.

A portion of Crater Rim Drive which fell into Halema‘uma‘u crater during the 2018 summit collapse remains visible on a block perched on the south wall of the crater (center of photo). The road's yellow center line makes a straight mark visible along the center of the block.

The Hawaiian Volcano Observatory technician team did maintenance on the Hualālai repeater station during the week of April 10, 2023. This photo shows the team walking towards the site, which is an important telemetry hub for Hawaiian Volcano Observatory volcano monitoring data. Mauna Kea and Mauna Loa are visible in the background. USGS image by M. Warren.

A Hawaiian Volcano Observatory technician replaces batteries on the Hualālai repeater station. The station, which relays monitoring signals from nearby stations back the observatory, is powered by batteries that store energy generated by solar panels. USGS image by M. Warren.

A Hawaiian Volcano Observatory technician removes the electronics board on the Hualālai repeater station. The electronics board for the station was replaced with a 48-volt system electronics board as part of a station upgrade. USGS image by C. Parcheta.

A Hawaiian Volcano Observatory scientist drills holes to install a new electronics box for the Hualālai repeater station upgrade. USGS image by M. Warren.

During station maintenance at the Hualālai repeater, Hawaiian Volcano Observatory technicians installed a new webcam, the HLcam. This camera is located on Hualālai and provides view of Mauna Loa's northwest flank.

The lead electronics technician at the Hawaiian Volcano Observatory checks that the new HLcam is transmitting. The HLcam is located on the southeast side of Hualālai and provides views of the northwest flank of Mauna Loa.

Hawaiian Volcano Observatory technicians work on installing a new electronics box on the Hualālai repeater station as part of a station upgrade in April 2023. USGS image by M. Warren.

Hawaiian Volcano Observatory technicians upgraded the Hualālai repeater station to lithium batteries, despite the chilly temperatures on Hualālai. USGS image by M. Warren.

Hawaiian Volcano Observatory technicians install new lithium batteries at the Hualālai repeater station. The station is located at an elevation of 2,160 meters (7,090 feet), on the southeast side of Hualālai. USGS image by M. Warren.

During the week of April 10, Hawaiian Volcano Observatory technicians upgraded the Hualālai repeater site, which is an important telemetry hub for volcano monitoring data. The site is located on the southeast side of Hualālai, at an elevation of 2,160 meters (7,090 feet) above sea level.

The Vibroseis vehicle that will be operating in the Kīlauea summit region throughout May 2023. The vehicle belongs to the Natural Hazards Engineering Research Infrastructure (NHERI) experimental facility at the University of Texas at Austin, which is supported with funding from the National Science Foundation.

Project area for the active and passive seismic imaging of the three-dimensional structure and magma system beneath the summit of Kīlauea volcano. The dense nodal array and the Vibroseis truck will allow us to collect data that will lead to improved understanding of the structures and magma storage features beneath the summit of Kīlauea.

Moanalua eighth graders experience a Trashcano eruption demonstration with liquid nitrogen for a school visit at UH Hilo. UH Hilo photo by Meghann Decker.

USGS geophysicists take gravity measurements on the dropped-down block of Kīlauea as part of annual monitoring. Annual microgravity surveys are crucial in confirming whether ongoing uplift or subsidence is caused by magma intrusion or withdrawal.

The Kīlauea summit eruption has been paused since Tuesday, March 7, 2023, and this reference map depicts the Halema‘uma‘u crater floor in its present noneruptive state. The eruption statistics provided here reflect activity up until the pause, since they are derived from measurements taken during a HVO helicopter overflight on Friday, March 10.

USGS scientist, Mike Poland, measures gravity using a gravimeter on the caldera floor of Kīlauea. Measurements of gravity can be used to determine how mass is distributed beneath a volcano. At Kīlauea, the Hawaiian Volcano Observatory (HVO) performs routine microgravity surveys to monitor volcanic activity and to determine changes in gravity. USGS photo by A.

Eruptive activity was paused during the Friday, March 10, overflight of Halema‘uma‘u, at Kīlauea summit. Numerous outgassing sites were present on the crater floor, but not active lava was present on the surface. USGS photo by M. Patrick.

A helicopter overflight on March 10, 2023, allowed for aerial visual and thermal imagery to be collected of Halema‘uma‘u crater at the summit of Kīlauea. No active lava was present in the crater, with only scattered warm spots on the crater floor.

A helicopter overflight on March 10, 2023, allowed for aerial visual and thermal imagery to be collected of Halema‘uma‘u crater at the summit of Kīlauea. No active lava was present in the crater, with only scattered warm spots on the crater floor.