CORETAN MASA LALU (SMA 2010-2011)
THE THUNDERS THREAT SHOULD BE ALERTED
Although people have already been familiar with technologi,
many people were killed by thunder, not only outside the house, but it can
strike people who stay inside the house as well. Many properties were distroyed
by the thunder every year.
Thunder is happened whwn there is an air movement
vartically. This vartical movement caused the separating of positive or
negative electromagnetic. Thunder usually appears when it will rain or whwn it
stopped. However it’s doesn’t mean that all of the rain will create thunder.
Because it only happen when there is a group of cumulonimbus cloud. It is a
kind of cloud that is formed in a short\time caused by high warming on the
earth ‘s surface.this support the water steam
raise up quickly. So we can analize the characteristic of cumulonimbus
is very big and huge cloud in the sky event just looks like the white cotton in
the huge size.
From the distance the cumulonimbus that produce thander can
be detected clearly, but it is rather difficult for people who stay under the
cloud. If the cloud chance immediatelly, wid
blows faster than usual and the sky gets dark and dark. It means that we
stay underneath the cumulonimbus. If its rained since the morning it can be
said that the thunder will not happen. It is because the earths surface is not
hot enough to form the thunders clouds.
Thunder
in indonesia are usually happened activelly at noon and in the night. The
thunders strikes to the ground mostly occured between 1 .m and 7 p.m in that
period the grounds warming is enough to create the cumulonimbus clouds.
On the other hand, thunder in the sea happened in the
morning, whwn morning the sea water is hotter than on the land, so the water
steam in the sea raise up and create the thunders clouds. The thunder in the
land is seven times more than in the sea. The cumulonimbus can be predicted for
instance. If the weather in the morning is hot, that the cloud will creat in the afternoon. Because it depends on the land
warming, so the appereance of the cloud come up locally, in turn, the existance
of the thunder is locally, too. It means in one place the thunder attacked many
times on the other hand, with another place, it seldom happened and you have to
know that a cell of the cloud maker can come around not more than 7 km in
distance.
The place with high risk lightening by thunder are in
valley, hills, rural areas and villages. In cities, it has smaller risk than in
the villages because the density population there nearly the same. Then another place with a high risk
thunder is swimming pool. If you are swimming and the cloud gets dark and dark
immediatelly. You must avoid this place soon as possible and looking fot the
shalter in the nearest building.
Thunder can also flow via the fibre of electronic and phone
cable. To avoid the distruction of the electronic apliances, it is better to
plug out the electric socket from its terminal. TV Antenna can be a proper tool
to send the thunder to the house. Then to protect our building from thunder,
its doesnt need provide the thunder protector around the house because besides
its so expensive for common people, the boned building construction in our
house has a function as the thunder protector.
