USGS photo shows spattering at on the margin of the Halema'uma'u Crater lava lake margin on Sunday, April 22.

USGS photo shows spattering at on the margin of the Halema'uma'u Crater lava lake margin on Sunday, April 22.
Lava from Hawaii's Kilauea volcano spilled over the banks of the summit lava lake overnight on April 22, according to the USGS's Hawaiian Volcano Observatory (HVO).

Lava could be seen spilling onto the floor of the Halemaumau Crater in photographs and videos from the HVO team taken on April 22 and 23. The level of lava has since fallen back below to the level of the rim, according to the HVO update from April 23. "The lower lake level reflected the switch from inflation to deflation at the summit of Kilauea," HVO said in a statement posted on its website.