Management of tectonic hazards

Used for my geography A2 exam but can be used for case studies for management for GCSE and AS 

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  • Created on: 16-06-14 21:11
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6 GEO4 ­ REVISION
BEFORE
Nevado Del Ruiz (1985) Key facts
Volcanic eruption ­ EXCLUSION ZONES 3 VEI - usgs
No prep before the event even though 23,000 Died- usgs
there were precursors. Village of Armero destroyed ­
They did have experts who went to main victims.
monitor the volcano 2 days before the They are an LEDC with a GDP
event but no alarm was raised. ­ then of £ 1,160 ­ source is
(Sophistication of TECHNOLOGY ) World Bank.
No one was evacuated and no Plate boundary = destructive
emergency plans were set up. south America and Nazca plate
SOURCE = GEOTALKS.CO.UK
EVALUATION:
This volcanic eruption had Lahars
like Mt Pinatubo 1991 in and they
tried to divert the lahar flow just
resulted in disaster killing 700 ­ is
prep before worth it?
AN EXCLUSION ZONE WAS SET UP
IN Montserrat in 1997 but this
blocked out the capital city and its
only airport. There may have
been no primary impact to the
North of the country but food
shortages, and slow arrival of aid
took its toll.
Eyjafjallajokull Iceland (2011) Key
fact
s
Over 3000 warnings and precursors 5
Eruption occurred in stages so Iceland was
prepared. V
Mainly farmland surrounding the hazard. E
Less impact on local people this way. I
Well prepared had warning systems in
place when it did erupt 500 people were ­
evacuated. ­ Sourced from GEOTALKS.
B
EVALUATION I
Only prepared due to frequency of events G
in Iceland G
They have a small population E
Eruption was mainly ash plumes in the air R
stratovolcano little damage.
Mt St Helens (MEDC) ­ exclusion T
zone set up on wrong side of H
volcano 90% of deaths occurred A
where they were wrongly not N
evacuated though they had the
technology to predict ­ how N
effective is technology and is E
there a significance of V
development over hazard type A
and unpredictability? D
O
D
E
L
R
U
I
Z

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M
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E
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Japan 2011 Key
fact
s
Earthquake proof buildings able to shake F
with seismic action built after Kobe in l
1995. o
Still 25 million tonnes (dailymail.co.uk) of t
rubble from damaged buildings mainly due s
to tsunami ­ PREPARED FOR AN EQ a
(PRIMARY) BUT NOT TSUNAMI m
(SCONDARY)
Trained civilians earthquake preparedness o
day. f
Warning systems set up but failed ­ people
had to manually worn woman who did this 2
lost her life.…read more

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­
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M
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M
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Asian/Boxing Day Tsunami 2004 Key
Fac
ts
International event hit several LEDC 5
COUNTRIES such as Indonesia and 0
Thailand.
Had barely any warning systems set up f
t
despite being in an area of high
.
tectonic activity hit different coastlines
every 15 minutes or so warnings could w
have saved subsequent countries. a
Insurers paid only £4.…read more

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