how many a year which are powerful enough to do damage?
2 or 3
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how much is considered powerfull
5.5 on the richter scale
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1906
san francisco earthquake destroyed most of the city
6 of 42
drought in cali caused by
anticyclones (dry air and no rain)
7 of 42
La nina
period when water surface is cooler in eastern pacific ocean. less evaporation and precipitation
8 of 42
wind blows from where?
westwards from dry desert areas like arizona
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southern cali
22 died in forest fire. 1.3k homes burnt down.
10 of 42
tsunami
series of large waves
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caused by
earthquake on sea bed (pacific ocean) or landslides into ocean
12 of 42
earthquake off the coast of
alaska caused a tsunami
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killing
12
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in
1964
15 of 42
landslides
occur on unstable + steep land
16 of 42
triggered by
coastal erosio, rain storms and earthquakes
17 of 42
risk is high because
much is built around steep slopes and coastal land
18 of 42
volcanoes
none since 1915 lassen peak
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vulnerability
70% built within 50km of fault. lots built on unstable land. buildings on coast. 20% residents under poverty line. massive economy = huge economic losses
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where and what is the phillippines
south east asia. a group of islands
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how did they form
at the eurasian and phillippine plate boundary, folding and risen magma from mantle.
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what type of boundary
destructive
23 of 42
who goes down on who?
Phillippines subducts
24 of 42
mount pinatubo
erupted in 1991. buildings collapsed and crops destroyed, farm ruined by ash
25 of 42
earthquakes happen when
phil and asian lock together when phil goes down, pressure builds up then phil jerks up
26 of 42
occur how often?
daily but aren't felt
27 of 42
luzon islands
1990 killed 1.5k + ppl. 7.8 richter scale
28 of 42
good for landslides?
yes, lots of rain and steep slopes
29 of 42
also triggered by
earthquakes
30 of 42
typhoons
around 10 a year
31 of 42
develop
in pacific ocean then move westwards
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tsunamis
caused by earthquakes
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in 1997
earthquake of 7.9 mag caused a TSUNAMIIIIIIIII killed thousands
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where
around coastline of moro gulf
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droughts
parts of phillippines have wet and dry seasons
36 of 42
e.g manila
wet=may->oct dry=nov->april
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occurs when
wet season wasn't wet enough
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in 2005
luzon island had a drought
39 of 42
what happened
not enough water from hydroelectic power plants = social and economic effects
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manila 1970
flood destroyed crops
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pop. is vulnerable
luzon and manila densely populated, pop increase = deforestation, many below pov line. built near hazardous areas. angeles built next to mount pinatubo
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Other cards in this set
Card 2
Front
which fault line does california sit upon?
Back
san andreas fault
Card 3
Front
what type of boundary?
Back
Card 4
Front
how many a year which are powerful enough to do damage?
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