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

 

Fonterra: Canpac Site 'Resize' To Focus More On Paediatrics

Fonterra is looking at realigning its packing operations at Canpac, in the Waikato, to focus more on paediatric nutritionals... The proposed changes could mean around 110 roles may not be required at the site which currently employs 330. More>>

ALSO:

Scoop Business: Postie Plus Brand Gets 2nd Chance With Well-Funded Pepkor

The Postie Plus brand is getting a new lease of life after South Africa’s Pepkor bought the failed retailer’s assets out of administration and said it will use its purchasing power to reduce costs of stock and fatten margins. More>>

ALSO:

Warming: Warming Signs From State Of Climate Report

Climate data from air, land, sea and ice in 2013 'reflect trends of a warming planet' -- says the latest State of the Climate report, launched by U.S. and New Zealand scientists. More>>

ALSO:

Scoop Business: Embrace Falling Home Affordability, Says NZIER

Despair over the inability to afford a house is misplaced and should be embraced as an opportunity to invest in more wealth-creating activity, says the principal economist at the New Zealand Institute of Economic Research, Shamubeel Eaqub. More>>

Productivity Commission: NZ Regulation Not Keeping Pace

New Zealand regulators often have to work with out-of-date legislation, quality checks are under strain, and regulatory workers need better training and development. More>>

ALSO:

Callaghan Innovation: Investment To Help Deepen Innovation Reporting

Callaghan Innovation, the government’s high tech HQ for Kiwi business, is to help deepen New Zealand media coverage of the commercialisation of innovation through an arms-length partnership with independent business news service BusinessDesk. More>>

ALSO:

Tax Credits, Grants: Greens $1Bn R&D Plan

In the Party’s headline economic announcement, the Greens have launched their plan to build a smarter, more innovative economy which has as its centrepiece an additional $1 billion of government investment in research and development (R&D) above current spend, including tax breaks for business. More>>

ALSO:

Inflation: CPI Increases 0.3 Percent In June Quarter

The consumers price index (CPI) rose 0.3 percent in the June 2014 quarter, Statistics New Zealand said today. This follows rises of 0.3 percent the March quarter and 0.1 percent in the December 2013 quarter. More>>

ALSO:

Get More From Scoop

 
 
Computer Power Plus

Standards New Zealand

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