Halemaʻumaʻu eruption · episode 22 of 55
Kīlauea episode 22
Episode 22 of Kīlauea's Halemaʻumaʻu eruption began at 5:13 a.m. HST on May 16, 2025 and ended at 3:29 p.m. HST the same day. USGS gives the duration as 10 hours. HVO's Uēkahuna tiltmeter (UWD) recorded 10 microradians of deflation during the episode. HVO notes: North vent active only.
Episode 22 at a glance
- Start (HST)
- May 16, 2025, 5:13 a.m.USGS timeline
- End (HST)
- May 16, 2025, 3:29 p.m.USGS timeline
- Duration
- 10 hoursUSGS timeline
- UWD tilt (deflation)
- 10 microradiansHVO notice
- Max fountain height
- about 276 mUSGS timeline
- Lava erupted
- about 3.6 million m³USGS timeline
- Pause that followed
- 9 daysUSGS timeline
In HVO's words
The sentences these figures come from, quoted from USGS Hawaiian Volcano Observatory notices.
“The tiltmeter at Uēkahuna (UWD) recorded 10 microradians of deflation during episode 22.”
Other HVO notices about episode 22 gave: 10.3 microradians.
HVO notices about episode 22
- Status Report · May 16, 2025, 6:17 a.m. HST
- Status Report · May 16, 2025, 3:55 p.m. HST
- Daily Update · May 18, 2025, 9:47 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.