Bay Harbour: December 02, 2020

PAGE 18 BAY HARBOUR
Latest Canterbury news at starnews.co.nz
Wednesday December 2 2020
STOCK
UP FOR
CHRISTMAS
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1kg Prepack
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5 49 pk
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Cadbury Favourites 365g
Or Roses 225g
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Specials available South Island only from Monday 30th November until STAFFORD Sunday STREET 13th
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Newly-developed methods
of extracting information
• From page 16
“By analysing these rupture
scenarios mathematically,
you can calculate the
ground shaking in different
places – but you can realistically
only do that for a
limited range of scenarios
because simulating the
propagation of seismic
waves through complex
geological structures is a
very large computational
task.”
The key to evaluating
a broader range of
earthquake rupture
scenarios could lie in
newly-developed methods
of extracting information
from background seismic
noise – or what Townend
called the Earth’s “hum”.
“Much of what we record
with seismometers is noise
generated by ocean waves,”
he said.
“It looks pretty random
but embedded in the
incoherence are useful
signals that tell us how
seismic waves propagate
between different parts of
the Alpine Fault and, say,
locations in Christchurch
or Nelson or wherever you
like.”
Techniques for extracting
those signals from the
noise recordings have been
developed by members
of the team and applied
successfully to faults in
PEOPLE ARE being invited
to play an interactive online
game that will test their
knowledge of what items
belong in the red, yellow
and green wheelie bins.
The game, which people
can play on their smartphones
and online has been
developed by city council
staff and is the latest tool in
the ongoing campaign to
help people bin good.
The game requires players
to drag selected items into
either the red, green or yellow
bin.If they put the item
in the right bin, they earn
points. If they put the item
in the wrong bin, the bin
shakes and they get an X on
the scoreboard. The correct
bin will light up.
The items used in the
game were selected because
they are ones that people
often get confused about
and put in the wrong bin.
Said council resource
recovery manager Ross
Trotter. “The success of
our kerbside rubbish and
recycling service depends
on people putting the right
California and Japan.
The novelty of this approach
is that calculating
how different patterns of
slip on the fault affected
ground shaking at locations
of interest throughout
the South Island and
southern North Island
could be done without having
to simulate the entire
wave propagation process.
Townend said the approach
meant they could
efficiently and accurately
simulate millions of different
earthquakes.
“This enables us to
compute realistic ground
shaking in population
centres and at other
vulnerable locations in
stuff in the right bin. This
new game is a fun, interactive
way of teaching people
about what bin they should
use for different items.
“The contents of the green
wheelie bin get processed
and turned into compost.
That cannot happen if there
is too much non-organic
material in the bin. Likewise,
the contents of the
yellow wheelie bin cannot
be recycled if non-recyclable
items are included.
“Our goal is to minimise
the amount of waste going
to landfill so that’s why we
need people to put the right
stuff in the right bin.
response to many more
earthquake rupture
scenarios than can be
practicably studied using
conventional approaches,”
Townend said.
“This means that we
can investigate a far more
comprehensive range of
scenarios that take into
account the latest information
we have about the
fault’s current state, and
obtain realistic probabilistic
estimates of the shaking
that will occur in inevitable
future large Alpine Fault
earthquakes.”
The new study is being
supported with a $960,000
grant from the Marsden
Fund. – NZ Herald
Game to test your
bin waste knowledge
“If you are confused
about what goes in each
of the bins, give the game
a try. I also recommend
that you use our updated
wheelie bin app. It has a
great search function which
you can use if you are
uncertain about which bin
a particular items belongs
in. All you have to do is
enter the name of the item
you want to dispose of and
it will tell you which bin to
put it in.’’
•Play the game
at ccc.govt.nz/
bingoodgameor
atsmartview.ccc.govt.
nz.