Lava lake visible atop Hawaii's Kilauea volcano

The US Geological Survey says a lake of lava has come into view atop Hawaii's Kilauea volcano, and a burst of seismic activity has shaken the summit in recent days.

It's the first time the lava lake has been visible since May 2015. It deflated Saturday, but it was expected to inflate again Sunday.

At least one earthquake was felt along with several smaller events, according to the Geological Survey.