2. ・Tsunami in the Indian Ocean
There are plate in the Indian Ocean. It called Indian
Plate. The plate can cause earthquake. Then,
tsunami well be caused naturally. It's deadly.
Actually, 230000 people were killed2004 Indian
Ocean tsunami
3. ・The Sumatran coast earthquake
There are often big earthquake and tsunami in the Indian
ocean. Especially, that around Sumatra island is called the
Sumatran coast earthquake. In this area, big earthquake has
been repeated at cycles of 100 to 150 years. And, it is caused
recent years. Tsunami also is whenever earthquake because
its epicenter is coast.
5. ・Tsunami warning system
There were no sea-level monitoring instruments in the Indian
Ocean. After that, a large network of seismographic centres,
national warning centres or agencies, coastal and deep-ocean
stations is in place across the Indian Ocean to detect potential
tsunamis and pass on warnings to communities. Experts say
more coordination is needed to ensure national centres are sharing
information across the region but the Indian Ocean is much better
prepared than in 2004.
6. ・How the system work
When an earthquake in the Indian Ocean region, the data is
sent to the PTWC based in Hawaii and the JMA in Tokyo. Two
centres locates and determines some information of tsunami
and earthquake. The PTWC and the JMA have to send the
observational result to the Indian Ocean. The two centres can
issue watches, to national bodies in the Indian Ocean.
And alert its population is done by each national
agency. Warnings to the population are delivered in a variety of
ways. In some countries, well-rehearsed drills will kick in and
local agencies will coordinate an evacuation.
7. ・My impression
I think that system can help a lot of people in the area has
many earthquakes. But the system is not accurate fully
and people get the information will be fluster. As a result, a lot
number can be killed. That system and Our knowledge of them
must be better. I want tsunami warning system to be help all
people in earthquake area.
