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

 


White Island Volcano - Alert lowered to Level 1

Volcanic Alert Bulletin WI-2013/11 - White Island Volcano - Volcano

4 March 2013, 4:00pm - Update; Volcanic Alert lowered to Level 1, Aviation Colour Code changed to Yellow.

Ash emission at White Island has ceased for the moment and the Volcano Alert Level is reduced to 1 with the Aviation Colour Code changing to Yellow.

Observations in the last week have shown that a small ash cone has been built in the “hot lake” crater, which is the current focus of activity. The ash cone is surrounded by a small moat of water.

It is likely that in the short term, activity will alternate between dry and wet eruptions. When drier conditions prevail, like last week, some volcanic ash may be produced. If there is an increase in water near the vent then phreatic (steam driven) eruptions may occur. The crater containing the lava dome remains unchanged.

Seismic tremor levels are currently low, which is thought to partly reflect the lack of water involvement in the current activity. A gas flight on 26th February measured around 600 tonnes per day of SO2, and 1950 tonnes per day of CO2, similar to other measurements made since the start of 2013.

White Island remains in a heightened state of unrest and the long term outcome of the unrest remains unclear. It could lead to explosive eruptions and larger ash emissions, like in August 2012, or decline to background activity. In the short term it is expected that activity will be variable, largely reflecting the influence of water on the style of activity.

Background

Unrest at White Island began in July 2012, leading to explosive eruptions and ash emissions in August. A small lava extrusion occurred in November, followed by phreatic, steam driven activity in December which continued through January and February 2013. Minor ash emissions have been interspersed throughout this eruption sequence as conditions within the craters have changed.

The Volcanic Alert Level ranges from 0 to 5 and defines the current status at a volcano. Level 1 indicates signs of volcanic unrest.

Aviation Colour Codes are based on four colours and are intended for quick reference only in the international civil aviation community.

Craig Miller
Duty Volcanologist


ENDS

© Scoop Media

 
 
 
 
 
Business Headlines | Sci-Tech Headlines

 

Power Outages, Roads Close: Easter Storm Moving Down Country

The NZ Transport Agency says storm conditions at the start of the Easter break are making driving hazardous in Auckland and Northland and it advises people extreme care is needed on the regions’ state highways and roads... More>>

ALSO:

Houses (& Tobacco) Lead Inflation: CPI Up 0.3% In March Quarter

The consumers price index (CPI) rose 0.3 percent in the March 2014 quarter, Statistics New Zealand said today. Higher tobacco and housing prices were partly countered by seasonally cheaper international air fares, vegetables, and package holidays. More>>

ALSO:

Notoriously Reliable Predictions: Budget To Show Rise In Full-Time Income To 2018: English

This year’s Budget will forecast wage increases through to 2018 amounting to a $10,500 a year increase in average full time earnings over six years to $62,200 a year, says Finance Minister Bill English in a speech urging voters not to “put all of this at risk” by changing the government. More>>

ALSO:

Prices Up, Volume Down: March NZ House Sales Drop 10% As Loan Curbs Bite

New Zealand house sales dropped 10 percent in March from a year earlier as the Reserve Bank’s restrictions on low-equity mortgages continue to weigh on sales of cheaper property. More>>

ALSO:

Scoop Business: Chorus To Appeal Copper Pricing Judgment

Chorus will appeal a High Court ruling upholding the Commerce Commission’s determination setting the regulated prices on the telecommunications network operator’s copper lines. More>>

ALSO:

Earlier:

Cars: Precautionary Recalls Announced For Toyota Vehicles

Toyota advises that a number of its New Zealand vehicles are affected by a series of precautionary global recalls. Toyota New Zealand General Manager Customer Services Spencer Morris stressed that the recalls are precautionary. More>>

ALSO:

'Gardening Club': Air Freight Cartel Nets Almost $12 Million In Penalties

The High Court in Auckland has today ordered Swiss company Kuehne + Nagel International AG to pay a penalty of $3.1 million plus costs for breaches of the Commerce Act. Kuehne + Nagel’s penalty brings the total penalties ordered in this case to $11.95 million ... More>>

ALSO:

Crown Accounts: Revenue Below Projections

Core Crown tax revenue has increased by $1.9 billion (or 5.0%) compared to the same time last year. However this was $1.1 billion less than expected and is reflected across most tax types, continuing the pattern of recent months. More>>

ALSO:

Get More From Scoop

 
 
Computer Power Plus
 
 
 
 
 
 
 
 
Sci-Tech
Search Scoop  
 
 
Powered by Vodafone
NZ independent news