Halemaʻumaʻu eruption · episode 17 of 55
Kīlauea episode 17
Episode 17 of Kīlauea's Halemaʻumaʻu eruption began at 10:15 p.m. HST on April 7, 2025 and ended at 9:45 a.m. HST on April 9, 2025. USGS gives the duration as 35.5 hours. HVO's Uēkahuna tiltmeter (UWD) recorded approximately 10.5 microradians of deflation during the episode. HVO notes: North and south vents active.
Episode 17 at a glance
- Start (HST)
- April 7, 2025, 10:15 p.m.USGS timeline
- End (HST)
- April 9, 2025, 9:45 a.m.USGS timeline
- Duration
- 35.5 hoursUSGS timeline
- UWD tilt (deflation)
- approximately 10.5 microradiansHVO notice
- Max fountain height
- about 73 mUSGS timeline
- Lava erupted
- about 3.9 million m³USGS timeline
- Pause that followed
- 13 daysUSGS timeline
In HVO's words
The sentences these figures come from, quoted from USGS Hawaiian Volcano Observatory notices.
“The UWD tiltmeter recorded approximately 10.5 microradians of deflation during episode 17 with approximately 6.5 microradians change on the SDH tiltmeter.”
HVO notices about episode 17
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.