The woman was later airlifted to the Queen's Medical Center on Oahu for emergency treatment.
Lava is entering the ocean and producing a large laze plume.
"If we stop operating, it not only hurts us, it hurts the community", Jones said.
In a flow that reached the ocean in 2016, the lava "hit a steep slope and was very quickly carried down to deeper parts of the ocean", Babb said.
AFP GETTYHawaii volcano eruption As Kilauea rages brush fires have broken out
Lava Ocean Tours was set to take tourists out as usual on Tuesday, although the "Hot Spot" was taken out of service after a basketball-size "lava bomb" tore a hole through its roof, a company saleswoman said.
"There's something new. There's something really new", he said.
"Today's unfortunate event is a good reminder about the risks involved with observing a natural wonder like this one and the reason officials are continuously monitoring the eruption to ensure the public is kept at safe distances on land, in the air and while at sea", Ross Birch, executive director of the Island of Hawaii Visitors Bureau, said in a statement.
"What I saw in humanity this morning was incredible". Apart from lava explosions, there is also a danger of clouds of hydrochloric acid and fine volcanic glass particles.
The U.S. Coast Guard in May instituted a safety zone where lava flows into the ocean off the Big Island.
The agency had been allowing experienced boat operators to apply for a special license to get closer up to 164 feet (50 meters), but it stopped allowing those exceptions Monday morning. It continues to spew lava, while two dozen other fissures that began opening up in early May remain inactive.
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