HVO reported that the W vent on the inner NW wall of Kilauea's Halema`uma`u Crater continued to supply the lava lake during 28 April-4 May through a submerged inlet.
The depth of the lake was about 227 m and lava continued to circulate in the W part, though the active area continued to shrink.
The E half of the lake remained solidified and comprised about 93 percent of the total area, based on thermal measurements acquired on 16 April.
The sulfur dioxide emission rate was 250 and 475 tons/day on 30 April and 2 May, respectively, continuing a downward trend that began in mid-April; the recent rates suggested that the effusion rate had also decreased.
The Aviation Color Code remained at Orange and the Volcano Alert Level remained at Watch.
Source: US Geological Survey Hawaiian Volcano Observatory (HVO)
Asosan (Japan)