Posts
9
September, 2012
On
Sunday, two earthquakes hit Kuril Islands in the Russian Far East.
The first quake of 5.6 point magnitude on the Richter scale was
recorded near the island of Paramushir, says seismological station in
the city of Severo-Kurilsk. Glass-ware ringed in cupboards for ten
seconds, and ceiling lamps rocked.
The
second earthquake with a magnitude of 5.3 points in Richter scale
took place in the deep-water Kurilo-Kamchatka trench. The epicenter
was located 270 kilometers east of the city of Kurilsk on the island
of Iturup.
There
was no tsunami warning.
Giant
'balloon of magma' inflates under Santorini
A
new survey suggests that the chamber of molten rock beneath
Santorini's volcano expanded 10-20 million cubic metres – up to 15
times the size of London's Olympic Stadium – between January 2011
and April 2012.
9
September, 2012
The
growth of this 'balloon' of magma has seen the surface of the island
rise 8-14 centimetres during this period, a team led by Oxford
University scientists has found. The results come from an expedition,
funded by the UK's Natural Environment Research Council, which used
satellite radar images and Global Positioning System receivers (GPS)
that can detect movements of the Earth's surface of just a few
millimetres.
The
findings are helping scientists to understand more about the inner
workings of the volcano which had its last major explosive eruption
3,600 years ago, burying the islands of Santorini under metres of
pumice. However, it still does not provide an answer to the biggest
question of all: 'when will the volcano next erupt?'
A
report of the research appears in this week's Nature Geoscience.
In January 2011, a series of small earthquakes began beneath the islands of Santorini. Most were so small they could only be detected with sensitive seismometers but it was the first sign of activity beneath the volcano to be detected for 25 years.
Nicaragua’s
San Cristóbal volcano erupts with 4 km ash plume
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