Hawaii volcano Kilauea: Explosive eruptions,

13 May, 2018, 01:02 | Author: Sheila Harris
  • At Kīlauea when the lava column drops below the water table groundwater may come into contact with with magma or hot rocks causing violent steam explosions

Satellite images of the Kilauea Volcanowere captured using the Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) which is in onboard NASA's Terra satellite. They view their trip as a once in a lifetime opportunity. She's anxious potential flight disruptions would strand them on the island.

"Everyone comes here", she said.

Residents of Kona on the west of the island have complained of volcanic smog, or vog, from the large amounts of sulphur dioxide and other pollutants spewing from Kilauea.

The Leilani Estates residential area remains in greatest danger, with 15 volcanic fissures so far having destroyed 36 structures, a lot of them homes, and forcing the evacuation of about 2000 residents.

A quake last Friday was measured at magnitude 6.9, the most powerful to hit the islands since 1975.

Since the quake, there have been frequent aftershocks.

From a geological standpoint, it wouldn't differ much from the Kilauea eruption that has destroyed 36 structures this month. Once the lava level reaches the groundwater elevation, onset of continuous ashy plumes or a sequence of violent steam-driven explosions may be the first sign that activity of concern has commenced. Communities about 2 miles away could showered by pea-size rock fragments or dusted with nontoxic ash, said Tina Neal, scientist-in-charge at the Hawaii Volcano Observatory.

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"Similar to what happened in 1924, when there were these large explosions, and those are more vigorous and there was more energy involved, so larger fragments can be blown out in greater distances", said U.S. Geological Survey Hawaiian Volcano Observatory geologist Janet Babb.

Ballistic projectiles: During steam-driven explosions, ballistic blocks up to 2 meters across could be thrown in all directions to a distance of 1 kilometer (0.6 miles) or more. Hawaii Volcanoes National Park, which includes the crater and surrounding region, announced Wednesday that it will close Friday in anticipation of the possible explosive event. Coney is anticipating more depending on what happens. Fresher magma may also produce lava fountains that shoot higher into the air and larger, faster-moving lava flows.

"When you start seeing ferns go brown overnight, it's like, 'Wow, I gotta get out of here, '" he said.

Barbara Lozano, who lives within a mile of the plant, said she would have thought twice about buying her property if she had known the risks. If you're anxious about steam and ash from the eruption of Hawaii's Kilauea volcano drifting on the Pacific jet stream into the Northwest, ala 1980's Mount St. Helens blast, don't sweat it.

State lawmakers are considering holding a special session to help those affected on the Big Island.

Like the town of Kamuela which is home to vast cattle ranches and Hawaii's own cowboys, called paniolo. There's also the night sky visible from the 13,803-foot (4207-meter) summit of Mauna Kea, the island's tallest peak and the location of some of the world's most advanced telescopes.

"We have unbelievable Realtors with a fantastic work ethic and community spirit", said Kehaulani Costa, executive director of the Hawaii Island Realtors. "We know it's a possibility, and we're going to err on the side of caution to be prepared for this". "And we don't want to seem callous and inconsiderate in our messaging and our promotion of the island", he said.

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