Halemaʻumaʻu eruption · episode 19 of 55
Kīlauea episode 19
Episode 19 of Kīlauea's Halemaʻumaʻu eruption began at 9:28 p.m. HST on May 1, 2025 and ended at 5:20 a.m. HST on May 2, 2025. USGS gives the duration as 8 hours. HVO's Uēkahuna tiltmeter (UWD) recorded about 7 microradians of deflation during the episode. HVO notes: Precursory low-level activity began on May 1, 2025 - 11:49 a.m.; north vent active only.
Episode 19 at a glance
- Start (HST)
- May 1, 2025, 9:28 p.m.USGS timeline
- End (HST)
- May 2, 2025, 5:20 a.m.USGS timeline
- Duration
- 8 hoursUSGS timeline
- UWD tilt (deflation)
- about 7 microradiansHVO notice
- Max fountain height
- about 126 mUSGS timeline
- Lava erupted
- about 2.8 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.
“About 7 microradians of deflationary tilt were recorded at UWD during the main fountaining of episode 19, and the tiltmeter began recording inflation as soon as the lava was draining in the vent at 5:20 a.m. HST this morning.”
HVO notices about episode 19
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.