What are Swell Waves?
Long-wavelength ocean waves that move away from their origin.
Created by windstorms or powerful weather systems, making them more energetic than local wind-generated waves.
Characteristics:
Travel long distances without significant change.
Organize into groups of similar height and period
Longer wavelengths mean higher energy and longer wave periods.
Forecasting Swells in India
The Indian National Centre for Ocean Information Services (INCOIS) in Hyderabad issues advisories.
Swell surge forecast system started in February 2020 to warn coastal populations.
Known as "Kallakkadal waves" in Kerala, recognized scientifically by UNESCO.
How are Swell Surges Different from Tsunami Waves?
Causes:
Swell Waves: Result from weather phenomena (e.g., windstorms).
Tsunamis: Primarily caused by earthquakes or tectonic activities.
Impact:
Kallakkadal waves can cause flash floods, but they are not as destructive as tsunamis, which have a much larger scale of impact.
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