Mt Tongariro map shows areas of risk

The weather closes in on Tongariro as DOC and science crews fly around the crater to get a better view, two days after the eruption.
1 of 24BRUCE MERCER
The weather closes in on Tongariro as DOC and science crews fly around the crater to get a better view, two days after the eruption.
Ash blankets the slopes below the Te Maari crater on Tongariro, two days after the eruption.
2 of 24BRUCE MERCER
Ash blankets the slopes below the Te Maari crater on Tongariro, two days after the eruption.
Ash covering rock close to the Tongariro Crossing track from the ash cloud from the Tongariro eruption.
3 of 24NZ Police
Ash covering rock close to the Tongariro Crossing track from the ash cloud from the Tongariro eruption.
Boulders gouged out metre sized 'impact' craters along the Tongariro Alpine Crossing track near Ketetahi Hut on Mt Tongariro.
4 of 24NZ Police
Boulders gouged out metre sized 'impact' craters along the Tongariro Alpine Crossing track near Ketetahi Hut on Mt Tongariro.
Dr Jon Procter from Massey University holds an ash sample after Mt Tongariro.
5 of 24Getty Images
Dr Jon Procter from Massey University holds an ash sample after Mt Tongariro.
Karen Martin helps clean up ash at a friends' property after Mt Tongariro erupted for the first time in over 100 years.
6 of 24Getty Images
Karen Martin helps clean up ash at a friends' property after Mt Tongariro erupted for the first time in over 100 years.
A pair of glasses are covered in ash after Mt Tongariro erupted for the first time in over 100 years.
7 of 24Getty Images
A pair of glasses are covered in ash after Mt Tongariro erupted for the first time in over 100 years.
A sheep is covered in ash after Mt Tongariro erupted for the first time in over 100 years.
8 of 24Getty Images
A sheep is covered in ash after Mt Tongariro erupted for the first time in over 100 years.
Road signs are coated in ash on state highway one after Mt Tongariro erupted for the first time in over 100 years.
9 of 24Getty Images
Road signs are coated in ash on state highway one after Mt Tongariro erupted for the first time in over 100 years.
Road signs and the surrounding area are coated in ash on SH1 one after Mt Tongariro erupted for the first time in over 100 years.
10 of 24Getty Images
Road signs and the surrounding area are coated in ash on SH1 one after Mt Tongariro erupted for the first time in over 100 years.
A motorist is surrounded by a cloud of ash on SH1 after Mt Tongariro erupted for the first time in over 100 years.
11 of 24Getty Images
A motorist is surrounded by a cloud of ash on SH1 after Mt Tongariro erupted for the first time in over 100 years.
Josh Martin, 14, and his mother Karen Martin cleaning up a friends' property after Mt Tongariro erupted for the first time in over 100 years.
12 of 24Getty Images
Josh Martin, 14, and his mother Karen Martin cleaning up a friends' property after Mt Tongariro erupted for the first time in over 100 years.
Dave Allan scribbles on a car at Poutu, near Lake Rotoaira.
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Dave Allan scribbles on a car at Poutu, near Lake Rotoaira.
Ash led to all flights to and from the Napier-Hastings' airport being cancelled.
14 of 24DAVID MACKAY/Fairfax NZ
Ash led to all flights to and from the Napier-Hastings' airport being cancelled.
The view of Mount Tongariro from Lake Rotoaira, on Sh46.
15 of 24PAUL DICK/Fairfax NZ
The view of Mount Tongariro from Lake Rotoaira, on Sh46.
Authorities brief the media about the eruption.
16 of 24BELINDA FEEK/Fairfax NZ
Authorities brief the media about the eruption.
Ash and steam rise from Tongariro.
17 of 24Tongariro Alpine Crossing - Adrift Outdoors
Ash and steam rise from Tongariro.
Volcanic ash on a car at Poutu near lake Rotoaira.
18 of 24PETER DRURY
Volcanic ash on a car at Poutu near lake Rotoaira.
Ash on the road from the Tongariro eruption.
19 of 24PETER DRURY
Ash on the road from the Tongariro eruption.
The view towards Ruapehu and Tongariro from Waiouru.
20 of 24KIERAN BROUGHTON
The view towards Ruapehu and Tongariro from Waiouru.
The Mt Ruapehu webcam, about 7.30am today.
21 of 24Mt Ruapehu webcam
The Mt Ruapehu webcam, about 7.30am today.
Takerei Gallagher closes the road at the corner of SH1 near National Park.
22 of 24PETER DRURY
Takerei Gallagher closes the road at the corner of SH1 near National Park.
The popular Tongarior Crossing walking track is closed.
23 of 24PETER DRURY
The popular Tongarior Crossing walking track is closed.
The sky over Ohakune hours after Tongariro's eruption.
24 of 24JOANNE O'KEEFFE/Supplied
The sky over Ohakune hours after Tongariro's eruption.

A map showing danger zones around Mt Tongariro in the event of another eruption has been released.

The new map created by GNS Science and Massey University described the "volcanic phenomena" that might be experienced during an eruption of Mt Tongariro as part of the current unrest episode.

It is designed to highlight the most hazardous areas which should be avoided in an eruption.

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The map marks out the areas most at risk from flying hot rocks and explosions, and those at risk from mud, hot ash and lava flows. The area crosses State Highway 46 and spreads into Lake Rotoaira.

The map has prompted warnings for people driving along the highway not to stop their vehicles within the hazard area.

The alert level for the volcano is at level two, with five the highest.

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GNS Science
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A GeoNet update yesterday said activity remained "weak".

Meanwhile, heavy rain yesterday caused small lahars on the mountain's ash coated slopes, briefly blocking nearby State Highway 46.

GeoNet vulcanologist Graham Leonard said any mudflow on a volcano was considered a lahar, but stressed that yesterday's mudslides had been expected.

There had not been another "eruptive event", he said. "It's quite a common occurrence."

Taupo Civil Defence manager Phil Parker said it was a "normal road event" unrelated to the volcano, and they would continue to monitor the road.

Mt Tongariro erupted for the first time in 100 years last week, sending ash and rock a kilometre into the air.

The Dominion Post