Wednesday | November 22, 2017
About Us | Contact | Subscribe

‘After Dark in the Park’ talk highlights Kilauea activity

Summit Eruption Statistics from 2008-2013

Overlook crater size:

Initial, March 2008: 115 feet (35 meters) diameter; late 2013: 525 feet (160 meters) wide; 700 feet (215 meters) long

Lava Lake:

Dimensions: variable, as large as 525 feet (160 meters) wide; 740 feet (225 meters) long

Distance below the rim: highly variable, between 72 feet (22 meters) and 720 feet (220 meters) below overlook crater rim (floor of Halema‘uma‘u Crater)


Number of explosive events throwing blocks or bombs out of overlook crater: about two dozen

Maximum distance blocks or bombs thrown from vent: 1,000 feet (300 meters)

Gas emission:

Typical sulfur dioxide emission rate: 500-5,000 metric tons (1.1-11 million pounds) per day

According to U.S. Geological Survey Hawaiian Volcano Observatory geologist Matt Patrick, Kilauea’s volcanic activity is steady.

“There’s no sign of it slowing down, stopping or speeding up,” he told a packed room Tuesday evening at the Kilauea Visitor Center auditorium.

Patrick gave an hourlong overview on the Halema‘uma‘u Crater and its active lava lake that fills the Overlook crater, as well as a presentation on the history of the summit area of the Kilauea volcano.

The event, “After Dark in the Park,” was part of the fifth-annual “Volcano Awareness Month.”

Using real-time webcam footage, he showed attendees how the Overlook crater has seen fluctuating lava lake activity, with the occasional explosions caused by parts of the rim of the crater falling into the lave lake.

According to information provided by USGS, the level of the lava lake has fluctuated constantly since it originally appeared in 2008. The rise and fall of levels are dependent upon gas buildup within the lava that pushes the surface up as much as 65 feet before the gas escapes and the lava drops down.

During the past year, the lava level was generally about 100-165 feet below the rim. In 2010, the lava was at one of its lowest points at 720 feet below the floor of Halema‘uma‘u, and two years ago it was at a relatively high level, about 200 feet below the crater rim.

Patrick said it’s currently about 160 feet below the rim of Overlook.

“It’s been in that general vicinity over the past year. No indication that we’re going to depart from that. We can also have potentially abrupt changes,” he said.

Active Lava Hawaiian Tours owner Michele Lopez said she attended the event to learn more about what was going on with the volcano. Lopez said she has had to stop tours after changes occurred along the East Rift Zone in 2013.

“So, what happened on Oct. 1 of last year, apparently the lava had stopped flowing in Kalapana. So for us, there’s no ocean entry, no coastal plain entry, no pali entry for our tours. For the last three months, tour companies have been idle,” she said. “So, I went in there and got informed in order to predict and anticipate what’s happening with the volcano.”

Eruption has been ongoing at the East Rift Zone since 1983, but the flow recently changed directions. Previously, it flowed into the ocean and along the coastal plain which, according to Patrick, was easier for people to see.

“Eight months ago, the vent changed location and the flow changed direction into a much more remote area,” he said.

Mayor Billy Kenoi issued a proclamation in 2010 designating January as “Volcano Awareness Month.”

Talks, discussions and activities regarding the volcano can be heard throughout January and are made possible by the Hawaiian Volcano Observatory, in cooperation with Hawaii Volcanoes National Park, the University of Hawaii at Hilo and Hawaii County Civil Defense.

For more information about the month’s activities, visit the Hawaiian Volcano Observatory website at

Email Megan Moseley at


Rules for posting comments