Mineral blockages may explain pressure build-up in Whakaari eruptions
Researchers say underground mineral blockages can trap pressure while volcanic gases escape to the surface.
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Researchers say underground mineral blockages can trap pressure while volcanic gases escape to the surface.
Thousands of people heading to Mt Ruapehu's Whakapapa ski field have created severe traffic delays on State Highway 48, with full carparks and road closures trapping visitors in queues.
Constant seismic activity beneath Mt Ruapehu has increased from weak to moderate levels, marking a possible early warning signal.