Halemaʻumaʻu eruption · episode 15 of 55
Kīlauea episode 15
Episode 15 of Kīlauea's Halemaʻumaʻu eruption began at 12:04 p.m. HST on March 25, 2025 and ended at 7:10 p.m. HST on March 26, 2025. USGS gives the duration as 31 hours. HVO's Uēkahuna tiltmeter (UWD) recorded just under 9 microradians of deflation during the episode. HVO notes: North and south vents active; south vent inclined.
Episode 15 at a glance
- Start (HST)
- March 25, 2025, 12:04 p.m.USGS timeline
- End (HST)
- March 26, 2025, 7:10 p.m.USGS timeline
- Duration
- 31 hoursUSGS timeline
- UWD tilt (deflation)
- just under 9 microradiansHVO notice
- Max fountain height
- about 322 mUSGS timeline
- Lava erupted
- about 3.6 million m³USGS timeline
- Pause that followed
- 5 daysUSGS timeline
In HVO's words
The sentences these figures come from, quoted from USGS Hawaiian Volcano Observatory notices.
“The UWD tiltmeter recorded just under 9 microradians of deflation during episode 15, with just under 7 microradians lost on the SDH tiltmeter.”
HVO notices about episode 15
- Status Report · Mar 25, 2025, 2:02 p.m. HST
- Status Report · Mar 26, 2025, 10:45 a.m. HST
- Status Report · Mar 26, 2025, 7:55 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.