Change in Seismic Activity At White Island
Change in Seismic Activity At White
29 January 2013 8.30pm
Release No: 2
The continuous volcanic tremor
which has been recorded during the past few weeks at White
Island changed to a pattern of intermittent tremor early
this morning (Tuesday 29 January).
Emergency Management Group Controller Warwick Murray said
the volcanic tremor remained strong, and the current level
of unrest meant there was a greater than usual hazard to
visitors to the island.
“The crater lake is drying out
and the frequent bursts of mud, steam and gas are still
vigorous. During the last few days, the bursts have thrown
mud and rock several tens of metres out from the lake area.
Steam and gas clouds above the volcano are often visible
from the Bay of Plenty coastline,” he said.
little risk to the mainland from an eruption.
Science’s past monitoring of the island showed that weak
ash eruptions have often followed drying out of this type of
mud-filled lake. More vigorous explosions of mud, rock and
perhaps molten sulphur are possible in future, with little
or no warning.”
The amounts of volcanic gases measured
last week were similar to those measured in December 2012
and did not suggest a large eruption was imminent, Mr Murray
said. However, both the ongoing mud bursts and the strong
seismic activity indicated that White Island was still at an
elevated state of unrest.
GNS Science continues to closely
monitor White Island. The Volcanic Alert Level remains at 1
and the Aviation Colour Code remains at
Other useful websites:
Bay of Plenty
Regional Council | Phone: 0800 884
Web: www.boprc.govt.nz |
Facebook: www.facebook.com/boprc |
Twitter: www.twitter.com/boprc |
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