Hawaii Volcano May Overflow As Lava Levels Rise

Rising lava levels at the Kilauea volcano in Hawaii are being monitored closely by scientists.

Video released by the US Geological Survey showed a stream of orange molten rock gathering at the volcano's Halema'uma'u vent.

It represents a natural phenomena scientists call a pyroclastic flow, with lava surging into a lake where temperatures can rise as high as 700C.

The lake, which is believed to have formed in the later part of 2009, has been reported to resemble an above-ground swimming pool.

But there are concerns the lava level could overflow the rim - while there was also new activity at the Puu Oo crater, which appeared to be draining lava until recently.