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Rotational slide: This is a slide in which the surface of rupture is curved concavely upward and the slide movement is roughly rotational about an axis that is parallel to the ground surface and transverse across the slide.

Lateral spreads are distinctive because they usually occur on very gentle slopes or flat terrain. The dominant mode of movement is lateral extension accompanied by shear or tensile fractures.

EARTHQUAKES: WHAT YOU FEEL

EARTHQUAKE INTENSITY

A telephoto view looking down on the fissure vent in the talus pile in the southwest corner of Halema‘uma‘u crater, taken from the western crater rim. Over the past 24 hours, this fissure vent has built up a spatter cone and spatter ramparts around its lava flow that cascades down to the crater floor.

View from the west rim of Halema‘uma‘u crater, showing the new lava flows that have covered the crater floor since the morning of June 7, 2023. This photograph, taken the morning of June 8, 2023, shows several active fissure vents that are feeding lava flows that cover the floor of the crater.

A summit eruption of Kīlauea volcano, within Halemaʻumaʻu crater, began at approximately 4:44 a.m. on June 7, 2023. This photo, taken from the publicly accessible Kīlauea Overlook at approximately 5:30 a.m. HST, shows that lava is flowing on the crater floor and there are several active vent sources.

A summit eruption of Kīlauea volcano, within Halemaʻumaʻu crater, began at approximately 4:44 a.m. on June 7, 2023. Lava is flowing on the crater floor and there are several active vent sources. The eruption at Kīlauea’s summit is occurring within a closed area of Hawai'i Volcanoes National Park and high levels of volcanic gas are the primary hazard of concern.

HVO scientists conducted an overflight of the new eruption within Halemaʻumaʻu crater at the summit of Kīlauea volcano, within began the morning of June 7, 2023. This aerial photo shows that multiple vent sources are active on the crater floor, much of which has been covered with new lava over the past several hours.

The B1cam, located on the down-dropped block west of Halemaʻumaʻu crater, is one of several Hawaiian Volcano Observatory webcams that are documenting the ongoing eruption at Kīlauea summit. You can view all Kīlauea summit webcams here: Summit Webcams | U.S.

USGS Hawaiian Volcano Observatory geologists collected samples erupted on June 7, 2023, during the new eruption within Halemaʻumaʻu crater. The samples were collected from the rim of the crater, and range in size up to several inches (6 cm) in size. The samples will be analyzed later for information about the lava erupted during.

A summit eruption of Kīlauea volcano, within Halemaʻumaʻu crater, began at approximately 4:44 a.m. on June 7, 2023. Lava is flowing on the crater floor and there are several active vent sources. The eruption at Kīlauea’s summit is occurring within a closed area of Hawai'i Volcanoes National Park and high levels of volcanic gas are the primary hazard of concern.

HVO scientists monitor the ongoing Kīlauea summit eruption from within an area of Hawai‘i Volcanoes National Park that remains closed to the public for safety reasons. They are equipped with a range of specialized safety gear and personal protective equipment such as gas masks, helmets, gloves, and eye protection.

A summit eruption of Kīlauea volcano, within Halemaʻumaʻu crater, began at approximately 4:44 a.m. on June 7, 2023. Lava is flowing on the crater floor and there are several active vent sources. The eruption at Kīlauea’s summit is occurring within a closed area of Hawai'i Volcanoes National Park and high levels of volcanic gas are the primary hazard of concern.

As of 9:30 a.m., multiple vents remain active in the ongoing eruption at Kīlauea summit. Most vents are on the crater floor; however, one fissure is in the southwest wall of Halemaʻumaʻu crater. This fissure is located about 30 meters (100 feet) above the lava lake surface and is approximately 20-25 meters (65-80 feet) long. 

Lava that is less than one day old drapes over lava from the late nineteenth to early twentieth centuries on Halemaʻumaʻu crater floor. By the time Hawaiian Volcano Observatory geologists arrived, this lava at the perimeter of Halemaʻumaʻu was solid but still warm to touch, having erupted earlier that day. Photo taken the afternoon of June 7, 2023, by K.

A helicopter overflight on June 7, 2023, allowed for aerial visual and thermal imagery to be collected of Halema‘uma‘u crater at the summit of Kīlauea. The overflight happened about two hours after the start of the new eruption at the summit, and eruptive activity consisted of lava fountaining and lava lake activity.

Lava fountaining from a fissure that cut across the southwest wall of Halema‘uma‘u on June 7, 2023, had built up a small cone structure by mid-day. The fissure was intermittently obscured by plumes of volcanic gases throughout the day. USGS photo by K. Lynn.

HVO scientists collect detailed data to assess hazards and understand how the eruption is evolving at Kīlauea's summit, all of which are shared with the National Park Service and emergency managers. Access to this hazardous area is by permission from, and in coordination with, Hawai‘i Volcanoes National Park.

HVO scientists monitor the ongoing Kīlauea summit eruption from within an area of Hawai‘i Volcanoes National Park that remains closed to the public for safety reasons. They are equipped with a range of specialized safety gear and personal protective equipment such as gas masks, helmets, gloves, and eye protection.

A summit eruption of Kīlauea volcano, within Halemaʻumaʻu crater, began at approximately 4:44 a.m. on June 7, 2023. Lava is flowing on the crater floor and there are several active vent sources. The eruption at Kīlauea’s summit is occurring within a closed area of Hawai'i Volcanoes National Park and high levels of volcanic gas are the primary hazard of concern.

Hawaiian Volcano Observatory geologists scouted the perimeter of Halemaʻumaʻu crater floor for a location to sample lava erupted by new vents that opened the morning of June 7, 2023. Initial lava flows inundated the crater floor (an area of approximately 1.5 square km or 370 acres) and added about 10 meters (32 feet) depth of new lava.