A photographer slinks into the Pu'u 'O'o crater of Hawaii's Kilauea volcano, which has been active since 1983."A lot of the time the lava's flowing into the sea, and you can walk right up to it," said the USGS's Eichelberger.
One of Kilauea's hazards includes the potential for explosive eruptions. "That's when the magma comes flying out as blocks or particles of ash instead of flowing out intact as lava," Eichelberger explained.
What volcanologists call explosive activity varies. "Sometimes they're discrete explosions ... and things go flying all over the place. Other times it's more like a spray from a fire hose," he said.
As a general rule, "it's wise not to be close to an explosive eruption." Source
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