Which one of the following can be considered as an initial warning of an approaching Tsunami ?
[amp_mcq option1=”Thundering noise” option2=”Squally winds and rainfall” option3=”Rapid withdrawal of water away from the beach” option4=”Rapid landward movement of water” correct=”option3″]
This question was previously asked in
UPSC CAPF – 2010
The most common natural warning sign of an approaching tsunami, particularly for the first wave, is a sudden and significant recession of the sea from the coastline, exposing the seabed. This happens because the trough (low point) of the tsunami wave often reaches the shore before the crest (high point). This is an immediate signal that a large wave is approaching and coastal areas should be evacuated.