Video | Business Headlines | Internet | Science | Scientific Ethics | Technology | Search

 


White Island Lava Dome Episode Over - Alert to level 1

Volcanic Alert Bulletin WI-2013/1 - White Island Volcano

7 January 2013, 2:00 pm - Lava dome eruption episode now over; Volcanic Alert changed to level 1; Aviation Colour Code changed to Yellow.

GNS Science Volcanologists today lowered the Volcanic Alert Level for White Island to level 1 and the Aviation Colour Code to Yellow. This reflects the end of the current period of eruption which involved the growth of a small lava dome in the crater.

The lava dome that was first observed in late November by tour operators has been monitored over the last 6 weeks. The most recent visit was on 1st January 2013 and this showed that the dome had not grown since previous visits on the 10th and 20th December 2012. As such we consider that the current episode of eruption to have ceased.

Lava dome temperatures measured on the 1st January were at around 200-240°C and the nearby hot lake was 70-80°C. These temperatures are similar to those made previously. GNS Science Volcanologist Nico Fournier said that “the dome looked exactly the same as it did on our previous visits. Good viewing conditions allowed us to get some remote temperature measurements using an infrared thermometer. The hot lake was really fizzing, lots of gas coming through it”

Results of airborne gas measurements from 20th December showed that White Island is emitting volcanic gases at the rate of approximately 400T/d SO2, 1300T/d CO2 and 10T/d H2S.

Seismicity continues to show elevated levels of tremor.

Observers of the GeoNet webcams may notice a slight glow in the night time images which is related to the relatively hot dome and gases.

Even though the current episode of eruptive activity is over White Island still remains in a heightened state of unrest and future eruptions are still possible with little or no warning.

GNS Science continues to closely monitor White Island through the GeoNet project.

Background

The Volcanic Alert Level ranges from 0 to 5 and defines the current status at a volcano. Level 1 indicates departure from typical surface background activity.

Aviation Colour Codes are based on four colours and are intended for quick reference only in the international civil aviation community. A reduction to Code Yellow from Orange indicates volcanic activity has decreased significantly but continues to be closely monitored for possible renewed increase.

Volcanoes can erupt in many different ways. They can erupt explosively like Tongariro in 2012 when rocks and ash were hurled into the sky. They can erupt effusively with lava flows like Ngauruhoe in 1954 or in Hawaii. A lava dome is a type of effusive eruption.

The GeoNet project is funded by EQC and provides monitoring for all of New Zealand’s volcanoes.

Craig Miller
Duty Volcanologist

ENDS


© Scoop Media

 
 
 
 
 
Business Headlines | Sci-Tech Headlines

 

Sky City : Auckland Convention Centre Cost Jumps By A Fifth

SkyCity Entertainment Group, the casino and hotel operator, is in talks with the government on how to fund the increased cost of as much as $130 million to build an international convention centre in downtown Auckland, with further gambling concessions ruled out. The Auckland-based company has increased its estimate to build the centre to between $470 million and $530 million as the construction boom across the country drives up building costs and design changes add to the bill.
More>>

ALSO:

RMTU: Mediation Between Lyttelton Port And Union Fails

The Rail and Maritime Union (RMTU) has opted to continue its overtime ban indefinitely after mediation with the Lyttelton Port of Christchurch (LPC) failed to progress collective bargaining. More>>

Earlier:

Science Policy: Callaghan, NSC Funding Knocked In Submissions

Callaghan Innovation, which was last year allocated a budget of $566 million over four years to dish out research and development grants, and the National Science Challenges attracted criticism in submissions on the government’s draft national statement of science investment, with science funding largely seen as too fragmented. More>>

ALSO:

Scoop Business: Spark, Voda And Telstra To Lay New Trans-Tasman Cable

Spark New Zealand and Vodafone, New Zealand’s two dominant telecommunications providers, in partnership with Australian provider Telstra, will spend US$70 million building a trans-Tasman submarine cable to bolster broadband traffic between the neighbouring countries and the rest of the world. More>>

ALSO:

More:

Statistics: Current Account Deficit Widens

New Zealand's annual current account deficit was $6.1 billion (2.6 percent of GDP) for the year ended September 2014. This compares with a deficit of $5.8 billion (2.5 percent of GDP) for the year ended June 2014. More>>

ALSO:

Still In The Red: NZ Govt Shunts Out Surplus To 2016

The New Zealand government has pushed out its targeted return to surplus for a year as falling dairy prices and a low inflation environment has kept a lid on its rising tax take, but is still dangling a possible tax cut in 2017, the next election year and promising to try and achieve the surplus pledge on which it campaigned for election in September. More>>

ALSO:

Job Insecurity: Time For Jobs That Count In The Meat Industry

“Meat Workers face it all”, says Graham Cooke, Meat Workers Union National Secretary. “Seasonal work, dangerous jobs, casual and zero hours contracts, and increasing pressure on workers to join non-union individual agreements. More>>

ALSO:

Get More From Scoop

 
 
Standards New Zealand

Standards New Zealand
 
 
 
 
 
 
 
 
Sci-Tech
Search Scoop  
 
 
Powered by Vodafone
NZ independent news