Images

Examples of information that the USGS Hawaiian Volcano Observatory provides, including data of current activity, scientific publications, maps, and summaries (such as fact-sheets), and eruption response information. All have been part of the USGS review process.

Calendar of the USGS-Hawaiian Volcano Observatory (HVO) Volcano Awareness Month events in January 2025, during which HVO and close partners raise awareness of Hawaii’s volcanoes and active volcanic processes that continue to influence us today. 

Panels A and B show what an interferogram would look like for a simple expanding spherical magma chamber from an ascending and descending orbital perspective. The star shows the true center of the inflating magma source. The arrow and bar denote satellite flight direction and look direction respectively. Each fringe represents approximately 1.55 cm.

Flyer describing the USGS-Hawaiian Volcano Observatory (HVO) art and poetry contest as part of Volcano Awareness Month in January 2025. We invite Kama’āina, visitors, and anyone with an interest in volcanoes to help us raise awareness of Hawaii’s volcanoes and active volcanic processes that continue to influence us today. 

A HVO geologist inspected the KWcam enclosure for potential water entry points and found a weak seal. HVO staff will likely return in the future to make repairs to the enclosure or replace it all together. USGS photo by J. Barnett.

The KWcam on the eastern rim of Kaluapele (Kīlauea caldera) has been sending blurry images due water condensation inside the camera enclosure. On December 3rd, 2024, HVO staff visited the webcam to dry out the enclosure and search for any perforations that may be the source of the leak. USGS photo by H. Winslow.

A HVO geologist inspected the KWcam enclosure for potential water entry points and found a weak seal. HVO staff will likely return in the future to make repairs to the enclosure or replace it all together. USGS photo by J. Barnett.

HVO staff also visited the B1cam on the western side of Kaluapele (Kīlauea caldera) to remove water, replace desiccant packets, and clean off spider webs on the glass which were beginning to obscure the camera's view. USGS photo by H. Winslow.

While servicing the B1cam, HVO staff captured this telephoto view of the cones that formed on the floor of Kaluapele (Kīlauea summit caldera) during the September 2023 summit eruption. USGS photo by H. Winslow.

Example plots of STA/LTA alarm on infrasound data for four possible alarm scenarios. A shows detection of a real eruption, B shows a false detection of non-volcanic change, C shows failure to detect a real eruption amid noisy data, and D shows no detection of any event of interest.

A close-up view of a tree mold in a lava flow from the September 2024 Nāpau eruption. When the active lava flow came into contact with the tree, a mold was formed (black hole near center of photo). The high heat of the lava eventually burned through the base of the tree on the right side of the image causing it to fall on top of the newly emplaced lava flow.

A USGS Hawaiian Volcano Observatory scientist uses a hammer to collect a sample from a cooled lava flow near the western end of the September 2024 Kīlauea East Rift Zone fissure system. On November 25, Hawaiian Volcano Observatory geologists visited the recent eruption area to collect lava samples and other data to further their studies of the eruption.

On November 25, 2024, USGS Hawaiian Volcano Observatory geologists surveyed the lava-draped west walls of Nāpau Crater. This view looks to the southwest and shows where the lava falls were vigorous enough to throw molten spatter over to the trail area. USGS photo by K. Lynn.

This image shows spatter that was thrown up onto the Nāpau Crater trail to the northeast of the September 2024 middle East Rift Zone lava falls that spilled over the western rim of Nāpau Crater. Boot for scale. USGS photo by K. Lynn.

During field work on November 25th, 2024, HVO geologists spotted these lava "rosettes" in Nāpau Crater. They could be found on the edges of the September 15–20 lava flows, and seemed to be twirled up lava margins that spun into flower shapes as the molten flows were viscous and cooling. USGS photo by K. Lynn.

Lava trees stand in the middle of a lava flow from the September 2024 eruption on Kīlauea’s East Rift Zone. The height of these lava trees represents the height of the lava flow at the time it was emplaced, with the lava cooling as it came into contact with the tree trunks.

Near the western-most fissures from the September 2024 Kīlauea East Rift Zone eruption, lava spatter is visible on the branches of a small ‘ōhi‘a tree. The lava spatter landed while it was still partially molten, causing it drape and stretch over the branches before hardening. USGS photo taken on November 25, 2024, by L. DeSmither.

A USGS Hawaiian Volcano Observatory geologist observes a fissure from the September 15–20, 2024, Kīlauea East Rift Zone eruption that occurred in and near Nāpau Crater. This photo was taken on November 25, where the first fissure opened, uprift (west) of Nāpau Crater. Pu‘u‘ō‘ō is visible on the skyline in the upper right. USGS photo taken by L. DeSmither.

On November 25, USGS Hawaiian Volcano Observatory geologists visited the site of the September 2024 eruption on Kīlauea’s East Rift Zone. Here, a shelly pāhoehoe lava flow (left) covered the base of a spatter cone (right) that grew around one of the lava fountains from an eruptive fissure vent. USGS photo taken by L. DeSmither. 

A USGS Hawaiian Volcano Observatory geologist stands in a lava channel from the September 2024 Kīlauea East Rift Zone Eruption and examines the spatter rampart of a fissure on the south side of the channel. Red oxidized blocks from the spatter rampart lay on the floor of the channel in the middle and bottom of the photo. USGS photo taken on November 25, 2024, by L.

A close-up view of sulfur crystals that have grown on a fallen tree from the September 2024 Kīlauea East Rift Zone eruption. This tree fell over a lava tree cast, which is releasing hot steam and volcanic gas to form this sulfur deposit. USGS photo taken by L. DeSmither on November 25, 2024.