Seismic activity has increased at Mt Ruapehu after the lake in the volcano's crater peaked in temperature.

Collating data on eruptions, earthquakes and gas emissions promise new predictive tools.

The lake on active Bay of Plenty volcano White Island has completely disappeared, a volcanologist has discovered.

GeoNet reports rapid rise in temperature in the mountain's crater lake as well as more shakes than usual.

The service has gradually resumed since the volcanic alert level for Mount Hakone was raised in May 2015.

Researchers get grant to find out how much notice there will be if volcano field becomes active.

Scientists continue to monitor one of New Zealand's volcanic hot spots as underground rumblings reverberate.

Were the quakes that struck Wairarapa today and Christchurch last night caused by the weather or planets ... or neither?

COMMENT: Auckland Council's recent bid to remove and downgrade a large number of "volcanic viewshafts" was shelved following strong criticism.

The explosive history of Rangitoto has again been rewritten, after scientists recovered buried clues of ancient blasts deep below the Island.

We smelt the inside of the Earth long before we saw it. It stormed up our nostrils, scorched our sinuses like a giant helping of wasabi, and made us cough and splutter.

Scientists have turned to an intriguing place to source cheaper, more efficient energy - blazing-hot magma kilometres below the ground.

Camping 200m inside an active volcano is understandably hot. Abseil 300m beyond that and you're not far away from cooking. "It would be like running a marathon with a wetsuit on," Auckland-based Geoff Mackley explained to the Herald on Sunday this morning from a hotel in Port Vila, the capital of Vanuatu. "It's very hot," he said. "It really saps your energy -- it's just extremely hot." Mackley was back in Port Vila recovering after leading a week-long volcanic expedition alongside fellow Auckland explorer and photographer Bradley Ambrose and Chris Horsley from England. Video/ Daniel Hines, Geoff Mackley & Bradley Ambrose

The eruption of a volcano on a small Papua New Guinean island on July 31 has again wreaked havoc on the lives of its inhabitants.

Mt Ruapehu has again felt the rumble of an avalanche - this time at its crater lake.

Mt Tongariro - long considered a peaceful neighbour to the rowdy Ruapehu - is much more fiery than we ever realised, says a scientist sharing new findings today.

Holidaymakers heading for Bali have suffered another setback after their delayed Air New Zealand plane was forced to return to Auckland today.

A catastrophic volcanic eruption in Auckland's industrial heart could have an economic impact of up to $10 billion in the first year.

Southern Chile's Calbuco volcano has erupted for the first time in nearly half a century, spewing a giant funnel of ash 10km into the sky.

A state-of-the-art underwater glider - the first of its kind in New Zealand - is set to uncover new insights into our offshore environment.

The volcanic alert level for Mt Ngauruhoe in the central North Island was escalated to level one by GNS Science today.

Flights between Australia and Tonga should be back up and running by Wednesday after plumes of volcanic ash above the small island nation grounded planes.

Large ash cloud from a volcano in Tonga is affecting flights in the region, with aviation authorities issuing an alert.

Kiwi Simon Turner took toasting marshmallows to the extreme this week when he threw his rod out over an active lava lake inside Marcum Crater in Ambrym, Vanuatu.

Videographer Bradley Ambrose films colleague Simon Turner having a beer and roasting a marshmallow at Marcum Crater in Ambrym, Vanuatu. As you do.