Kilauea Wakes Up: Lava Returns to Halemaʻumaʻu and USGS Raises the Alert to Watch

The pause at Kilauea is over. Precursory low-level eruptive activity ahead of episode 56 of the ongoing Halemaʻumaʻu eruption began at about 11:43 a.m. HST on Monday, November 2, when a large flow of lava emerged from the north vent inside Halemaʻumaʻu crater, the U.S. Geological Survey's Hawaiian Volcano Observatory (HVO) said in Volcanic Activity Notice 2026/H509, issued at 2:06 p.m. HST on Monday.

In response, HVO raised Kilauea's volcano alert level from Advisory to Watch and its aviation color code from Yellow to Orange. The observatory now forecasts that episode 56's lava fountaining could begin at any point from Monday afternoon through November 7 — a window pulled forward from November 4–7 because of what it called the onset of voluminous precursory overflows. This is a genuinely new development in a story WorldEye last covered on October 31, when episode 56 was still a forecast window of November 2–9 and the eruption was paused.

The notice gives an unusually precise account of the first hours. The initial rise of lava to the surface and its first overflow were passive, with no spattering or low dome fountaining — a sign, HVO said, that the magma was highly degassed. Minor spatter began in the vent at about 12:30 p.m. HST. At 12:45 p.m., drainback accompanied by vigorous spattering ended that first overflow.

Several minutes of vigorous spattering then accompanied lava rising again inside the north vent, ahead of a second overflow that began at 1:00 p.m. HST. Once lava reached the surface and began overflowing the vent again, the spattering became subdued, with minor spatter bursts less than 3 feet (1 metre) high on the lava pond surface. HVO cautioned that this kind of low-level precursory activity can continue for hours to days before a lava fountaining episode begins, and that it will publish another notice when episode 56's fountaining actually starts.

An alert level of Watch means the volcano is showing heightened or escalating unrest with an increased potential for eruption, or that an eruption is under way with limited hazards — a step above Advisory, where a volcano shows signs of unrest above background levels. Orange, the aviation color code, warns pilots and airlines that an eruption is under way or likely with no or minor ash emissions, which is why the code matters beyond Hawaii: Kilauea's summit sits under busy Pacific air routes.

For now, every eruptive vent and lava flow remains confined to Halemaʻumaʻu crater, inside the closed summit area of Hawaii Volcanoes National Park, HVO said. Tephra fall is greatest within 3 miles (5 km) of the vents, while lighter ash and Pele's hair — fine strands of volcanic glass — can stay suspended and travel much farther. Volcanic gas remains the wider hazard: sulfur dioxide released during the eruption reacts in the atmosphere to form vog, the volcanic air pollution that drifts downwind and can cause respiratory problems.

The current summit eruption has been running episodically since December 23, 2024, and most of its lava fountaining episodes have continued for a day or less, HVO notes. Episode 55, the most recent, began on October 17 and lasted only about six hours — which makes Monday's development the first lava back at the surface in 16 days, and the opening act of the eruption's 56th episode rather than a standalone event.

That pattern is why the alert change matters more than the size of Monday's flows. In this eruption, the sequence of quiet inflation, precursory overflows at the north vent, and then a fountaining episode has repeated dozens of times. The overflows are the volcano's tell: when they arrive in volume, as they did on Monday, the fountaining has so far followed within hours to days.

The forecast window runs through November 7, and the crater is one of the most-watched places on Earth. HVO itself runs three summit livestreams of the eruption, and WorldEye's dedicated Kilauea volcano webcam page gathers the summit views in one place, alongside the wider volcano webcams collection and the earthquake tracker that shows the seismic side of the same unrest.

If fountaining begins, expect the notice sequence to move fast: HVO said another Volcanic Activity Notice will be published when episode 56 starts. Until then, the official word is the observatory's daily updates, and the crater rim around Halemaʻumaʻu — closed to the public since late 2007 because of crater-wall instability, ground cracking and rockfalls — remains off limits regardless of how photogenic the glow becomes.