Halemaʻumaʻu eruption · episode 30 of 55

Kīlauea episode 30

Episode 30 of Kīlauea's Halemaʻumaʻu eruption began at 1:20 a.m. HST on August 6, 2025 and ended at 12:55 p.m. HST the same day. USGS gives the duration as 12 hours. HVO's Uēkahuna tiltmeter (UWD) recorded about 22.5 microradians of deflation during the episode. HVO notes: North and south vents active, north vent dominant; new vent in southwest wall.

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Episode 30 at a glance

Start (HST): August 6, 2025, 1:20 a.m.USGS timeline
End (HST): August 6, 2025, 12:55 p.m.USGS timeline
Duration: 12 hoursUSGS timeline
UWD tilt (deflation): about 22.5 microradiansHVO notice
Max fountain height: about 52 mUSGS timeline
Lava erupted: about 7.9 million m³USGS timeline
Pause that followed: 16 daysUSGS timeline

In HVO's words

The sentences these figures come from, quoted from USGS Hawaiian Volcano Observatory notices.

UWD tilt

“The Uēkahuna tiltmeter (UWD) recorded about 22.5 microradians of deflationary tilt during episode 30.”

HVO notice

HVO notices about episode 30

Daily updates: USGS Kīlauea volcano updates. Full table: USGS Timeline of Eruptive Episodes.

Times are Hawaiʻi-Aleutian Standard Time (HST). Start and pause times, durations, fountain heights and lava volumes come from the USGS Hawaiian Volcano Observatory's Timeline of Eruptive Episodes; tilt figures and episodes not yet in that table are quoted from HVO notices. USGS describes these as unreviewed, preliminary estimates that are subject to revision. Durations for episodes 17 and earlier may include precursory activity, and HVO rounds durations to the nearest hour, half-hour or day. A blank cell means HVO hasn't published that figure in a form we could read; we don't estimate it.

Credit: U.S. Geological Survey. This archive is generated automatically and is not an official USGS product.