Tsunami occurs from various sources, namely earthquakes, volcanic eruption, landslide and even meteorite impact. However, as we have kept witnessing from December 2004, after the earthquake of west coast of Sumatra, Indonesia with magnitude 9.1 (Mw) and another one in March 2011, off the north coast east of Japan, tsunami is mostly formed by earthquakes. Tsunami normally have long wavelengths reaching a distance of 10 and 500km at a speed of 700 km/h. At this speed, no man can stop this wave train.
Can Mauritius be hit by tsunami?
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| Active volcanoes, plate tectonics and the Ring of Fire |
According to the seismic map of earthquakes occurring more frequently, it can be clearly seen that the tectonics plate passes across the Indian Ocean, off the coast of Rodrigues Island. Also, as observed on the
live tsunami watch, earthquakes occurs nearly everyday but with relatively low magnitude that can hardly be felt by human.
It can thus be said that Mauritius is vulnerable to tsunami occurring in the Indian Ocean. However, with help of new technologies and tsunami watch stations setup across the world, just after the tsunami hit in December 2004, killing thousands of people, people are getting more alert. Earthquake prone to tsunami development is nowadays known few minutes soon after formation for necessary measures to be taken. As in April 2012, after the earthquake occurring 500 km southwest of Banda Aceh, Indonesia (Magnitude 8.6 Mw), people around the world were more alert and necessary precautions were rapidly taken. Tsunami signs often results in rise or fall in the sea level.
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| World Seismic Plates Boundaries |