Photo & Video Chronology — February 26, 2025 — Kīlauea summit eruption episode 11 | U.S. Geological Survey

Photo & Video Chronology — February 26, 2025 — Kīlauea summit eruption episode 11

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By Hawaiian Volcano Observatory February 26, 2025

The eleventh episode of Kīlauea's ongoing eruption in Halemaʻumaʻu crater within Kaluapele (the summit caldera) paused at 7:06 a.m. HST, February 20, after just under 13 hours of lava fountains erupting from the north and south vents, feeding lava flows onto the crater floor.

Color photographs of volcanic eruptive vent — Episode 11 of the ongoing summit eruption at Kīlauea started yesterday, February 25 at 6:22 p.m. HST and ended this morning, February 26 at 7:06 a.m. Field crews witnessed the last 40 minutes of episode 11, documented in this series of photos taken from the western rim of the volcano's summit caldera, looking southeast. The north vent (center bottom) stopped erupting around 6:35 a.m., and the south vent (right) stopped erupting at 7:06 a.m. USGS photos by N. Deligne.

Color photograph of geologist on volcanic crater rim

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A Hawaiian Volcano Observatory geologist measures the chemistry of volcanic gases emitted by Kīlauea summit eruption episode 11—within Halemaʻumaʻu crater—on February 26, 2025. USGS photo by M. Patrick.

Color photograph of volcanic crater with geologist on rim

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A Hawaiian Volcano Observatory geologist uses a laser rangefinder to measure the evolving height of cinder cones produced by recent lava fountaining at the summit of Kīlauea. Today, February 26, the highest part of the tallest cone rim was about 160 feet (48 meters) above the crater floor. USGS photo by M. Patrick.

Color photograph of volcanic eruptive vent and lava flow — Hawaiian Volcano Observatory geologists visited the caldera rim at Kīlauea this morning and observed the end of the summit eruption's eleventh episode, as fountains shut down at both eruptive vents between approximately 6:30 and 7:00 am. This photo shows fountaining at the north vent feeding a lava flow spreading east across the crater floor, about ten minutes before the shutdown. USGS photo by M. Patrick.

Color photograph of volcanic tephra on crater rim

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Recent lava fountaining at the summit of Kīlauea has produced large frothy clasts that have landed on the western caldera rim, in addition to many smaller clasts that have produced a thick carpet of new tephra. USGS photo by M. Patrick.

Color photograph of volcanic tephra on ground

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The density of clasts produced by recent fountaining at the summit of Kīlauea is similar to that of a kitchen sponge, due to abundant gas bubbles. These bubbles range in size from ones too small to see, up to larger ones about the size of golf balls. USGS photo by M. Patrick.

Color photograph of volcanic tephra in geologist's hand

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The shapes and textures of clasts produced by recent lava fountaining at the summit of Kīlauea also indicate their fluid nature as they traveled through the air. USGS photo by M. Patrick.

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