On It! Worksheet
Sumatra, or north-western ____________ is right on
a plate boundary. The earth's surface is made up of lots of different
tectonic plates and they are all moving around. The plate that has ____________
Indian Ocean on it is moving roughly north-east and colliding with Sumatra.
And as ____________ collision takes ____________ ____________ Indian
Ocean plate ____________ subducted ____________ Sumatra, and as that
plate is subducted ____________ breaks up and that is what causes the
earthquake. This earthquake been ____________ of the largest ever, one
of ____________ great earthquakes. There has been a rupture along a
fault about 1,000km ____________ and ____________ has generated a vertical
displacement of about 10m. The displacement in the sea floor has generated
this huge tsunami. Unlikely there will be ____________ tsunamis of the
____________ size. What normally happens when you get a very large ____________
is you get aftershocks that continue for many ____________ They are
usually a bit smaller ____________ the main shock, although it is not
____________ that there could be another ____________ But there may
be aftershocks and they may generate smaller tsunamis.
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