Halemaʻumaʻu eruption · episode 41 of 55
Kīlauea episode 41
Episode 41 of Kīlauea's Halemaʻumaʻu eruption began at 11:10 a.m. HST on January 24, 2026 and ended at 7:29 p.m. HST the same day. USGS gives the duration as 8 hours. HVO's Uēkahuna tiltmeter (UWD) recorded about 31 microradians of deflation during the episode. HVO notes: North and south vents active.
Episode 41 at a glance
- Start (HST)
- January 24, 2026, 11:10 a.m.USGS timeline
- End (HST)
- January 24, 2026, 7:29 p.m.USGS timeline
- Duration
- 8 hoursUSGS timeline
- UWD tilt (deflation)
- about 31 microradiansHVO notice
- Max fountain height
- about 450 mUSGS timeline
- Lava erupted
- about 10.6 million m³USGS timeline
- Pause that followed
- 22 daysUSGS timeline
End: the USGS timeline gives “January 24, 2026 - 7:29 p.m.”, but an HVO notice at the time said: “Activity Summary: Episode 41 lava fountaining from the north vent stopped at approximately 7:26 p.m. HST on January 24.”
In HVO's words
The sentences these figures come from, quoted from USGS Hawaiian Volcano Observatory notices.
“The Uēkahuna tiltmeter (UWD) recorded about 31 microradians of deflationary tilt during episode 41.”
HVO notices about episode 41
- Information Statement · Jan 22, 2026, 6:20 p.m. HST
- Volcano Activity Notice · Jan 24, 2026, 11:11 a.m. HST
- Status Report · Jan 24, 2026, 12:18 p.m. HST
- Status Report · Jan 24, 2026, 2:22 p.m. HST
- Status Report · Jan 24, 2026, 4:40 p.m. HST
- Volcano Activity Notice · Jan 24, 2026, 7:32 p.m. HST
- Status Report · Jan 24, 2026, 8:11 p.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.