Halemaʻumaʻu eruption · episode 34 of 55
Kīlauea episode 34
Episode 34 of Kīlauea's Halemaʻumaʻu eruption began at 12:53 a.m. HST on October 1, 2025 and ended at 7:03 a.m. HST the same day. USGS gives the duration as 6 hours. HVO's Uēkahuna tiltmeter (UWD) recorded approximately 26 microradians of deflation during the episode. HVO notes: North and south vents active; north vent inclined.
Episode 34 at a glance
- Start (HST)
- October 1, 2025, 12:53 a.m.USGS timeline
- End (HST)
- October 1, 2025, 7:03 a.m.USGS timeline
- Duration
- 6 hoursUSGS timeline
- UWD tilt (deflation)
- approximately 26 microradiansHVO notice
- Max fountain height
- about 383 mUSGS timeline
- Lava erupted
- about 9.0 million m³USGS timeline
- Pause that followed
- 17 daysUSGS timeline
In HVO's words
The sentences these figures come from, quoted from USGS Hawaiian Volcano Observatory notices.
“Deflationary tilt at UWD totaled approximately 26 microradians during episode 34 fountaining, with an estimated volume of approximately 12 million cubic yards (9 million cubic meters or 2.5 billion gallons) of lava erupted overnight.”
HVO notices about episode 34
- Status Report · Oct 1, 2025, 12:30 a.m. HST
- Volcano Activity Notice · Oct 1, 2025, 1:13 a.m. HST
- Volcano Activity Notice · Oct 1, 2025, 7:31 a.m. HST
- Daily Update · Oct 11, 2025, 8:30 a.m. HST
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.