Halemaʻumaʻu eruption · episode 16 of 55
Kīlauea episode 16
Episode 16 of Kīlauea's Halemaʻumaʻu eruption began at 10:57 p.m. HST on March 31, 2025 and ended at 12:04 p.m. HST on April 2, 2025. USGS gives the duration as 37 hours. HVO's Uēkahuna tiltmeter (UWD) recorded just over 14 microradians of deflation during the episode. HVO notes: North and south vents active, south vent dominant.
Episode 16 at a glance
- Start (HST)
- March 31, 2025, 10:57 p.m.USGS timeline
- End (HST)
- April 2, 2025, 12:04 p.m.USGS timeline
- Duration
- 37 hoursUSGS timeline
- UWD tilt (deflation)
- just over 14 microradiansHVO notice
- Max fountain height
- about 326 mUSGS timeline
- Lava erupted
- about 6.0 million m³USGS timeline
- Pause that followed
- 5 daysUSGS timeline
End: the USGS timeline gives “April 2, 2025 - 12:04 p.m.”, but an HVO notice at the time said: “Activity Summary: Episode 16 of the ongoing Halemaʻumaʻu eruption ended at 12:03 p.m. HST on April 2 when high fountaining at the south vent stopped.”
In HVO's words
The sentences these figures come from, quoted from USGS Hawaiian Volcano Observatory notices.
“The UWD tiltmeter recorded just over 14 microradians of deflation during episode 16, with 11 microradians lost on the SDH tiltmeter.”
HVO notices about episode 16
- Status Report · Mar 31, 2025, 11:49 p.m. HST
- Status Report · Apr 1, 2025, 11:22 a.m. HST
- Status Report · Apr 2, 2025, 12:23 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.