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Golfers at Hawaii's Volcanoes National Park on May 15, 2018. Photo: Mario Tama/Getty Images

Hawaii's Kilauea Volcano, which until Tuesday had mainly been oozing lava through 20 fissures in the ground, is now sending ash clouds as high as 12,000 feet into the air.

The big picture: The volcano's latest eruption, which began on May 3, has moved into a new, more dangerous phase and shows no signs of stopping. The U.S. Geological Survey and National Oceanic and Atmospheric Administration have issued a "red" alert to ensure pilots avoid the ash cloud, which can damage modern jet engines.

The details: The more explosive eruptions and related ash clouds are happening because the lava lake level in the volcano's crater has drained all the way down to near the level of the water table. This is releasing a large amount of steam, and rocks that fall into the crater can block the steam from escaping into the air. This causes pressure to build up, resulting in more explosive eruptions.

In a May 16 eruption update, the U.S. Geological Survey (USGS) said they had discovered "dense ballistic blocks up to 60 cm (2 feet) across" in a parking lot a few hundred yards from the crater. "These reflect the most energetic explosions yet observed and could reflect the onset of steam-driven explosive activity," the agency said. "Further observations are necessary to asses this interpretation."

What's next: The USGS says more ash clouds, and potentially even more powerful eruptions, are possible with little advanced warning. Also, lava continues to flow and form new fissures. In other words, this isn't over.

Go deeper

Dave Lawler, author of World
2 hours ago - World

Venezuela's predictable elections herald an uncertain future

The watchful eyes of Hugo Chávez on an election poster in Caracas. Photo: Cristian Hernandez/AFP via Getty

Venezuelans will go to the polls on Sunday, Nicolás Maduro will complete his takeover of the last opposition-held body, and much of the world will refuse to recognize the results.

The big picture: The U.S. and dozens of other countries have backed an opposition boycott of the National Assembly elections on the grounds that — given Maduro's tactics (like tying jobs and welfare benefits to voting), track record, and control of the National Electoral Council — they will be neither free nor fair.

Biden plans to ask public to wear masks for first 100 days in office

Joe Biden. Photo: Mark Makela/Gettu Images

President-elect Joe Biden told CNN on Thursday that he plans to ask the American public to wear face masks for the first 100 days of his presidency.

The big picture: Biden also stated he has asked NIAID director Anthony Fauci to stay on in his current role, serve as a chief medical adviser and be part of his COVID-19 response team when he takes office early next year.