Halemaʻumaʻu eruption · episode 48 of 55
Kīlauea episode 48
Episode 48 of Kīlauea's Halemaʻumaʻu eruption began at 4:40 a.m. HST on June 1, 2026 and ended at 1:37 p.m. HST the same day. USGS gives the duration as 9 hours. HVO's Uēkahuna tiltmeter (UWD) recorded about 17.1 microradians of deflation during the episode. HVO notes: North vent erupted lava fountain; precursory lava flows exclusively from the south vent. Small eq swarm and deformation on south rim.
Episode 48 at a glance
- Start (HST)
- June 1, 2026, 4:40 a.m.USGS timeline
- End (HST)
- June 1, 2026, 1:37 p.m.USGS timeline
- Duration
- 9 hoursUSGS timeline
- UWD tilt (deflation)
- about 17.1 microradiansHVO notice
- Max fountain height
- about 200 mUSGS timeline
- Lava erupted
- about 5.7 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 Uēkahuna tiltmeter (UWD) recorded about 17.1 microradians of deflationary tilt during episode 48.”
HVO notices about episode 48
- Volcano Activity Notice · May 30, 2026, 5:49 p.m. HSTPrecursory low-level eruptive activity before episode 48 of the ongoing Halemaʻumaʻu eruption began around 5:41 p.m. HST on May 30. It was preceded by frequent small spatter explosions within the north vent beginning on the evening of May 28.
- Volcano Activity Notice · Jun 1, 2026, 4:47 a.m. HSTLava fountaining of episode 48 of the ongoing Halemaʻumaʻu eruption at the summit of Kīlauea began at 4:40 a.m. HST on June 1. Fountaining activity is currently focused at the north vent, though the south vent has occasional overflows.
- Volcano Activity Notice · Jun 1, 2026, 5:44 a.m. HSTLava fountaining episode 48 of the ongoing Halemaʻumaʻu eruption at the summit of Kīlauea started at 4:40 a.m. HST on June 1. Fountaining activity is currently focused at the north vent.
- Status Report · Jun 1, 2026, 7:13 a.m. HSTSummary: Episode 48 of the ongoing Halemaʻumaʻu eruption at the summit of Kīlauea started at 4:40 a.m. HST on June 1. Tephra fall is reported within Hawaiʻi Volcanoes National Park and surrounding communities to the north.
- Volcano Activity Notice · Jun 1, 2026, 1:47 p.m. HSTLava fountaining episode 48 of the ongoing Halemaʻumaʻu eruption at the summit of Kīlauea ended at 1:37 p.m. HST on June 1 after 9 hours of continuous lava fountaining from the north vent.
- Status Report · Jun 1, 2026, 3:11 p.m. HSTSummary: Episode 48 of the ongoing Halemaʻumaʻu eruption at the summit of Kīlauea ended abruptly at 1:37 p.m. HST on June 1. The eruption is currently paused.
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.