Kīlauea summit eruption within Halemaʻumaʻu crater—October 1, 2021

A telephoto view of the western fissure that opened in the wall of Halemaʻumaʻu crater, during the new Kīlauea summit eruption. Spatter from the lava fountains have built a horseshoe-shaped cone (black lava) surrounding the upper part of the fountain, while lava flows into the lava lake at the base of the vent. A weak lava flow can be seen exiting a smaller vent to the north (right) of the main fountain. Dark solidified lava spatter is also visible to the south (left) of the main fountain, where lava was erupted briefly during the early stages of this fissure. The top of the old west vent from the 2020–21 eruption is visible in the lower right of the image. USGS photo by L. DeSmither taken on October 1, 2021.