PPT: Tsunami | Geography for UPSC CSE PDF Download

 Page 1


GEOGRAPHY 
CRASH COURSE
CAPSTONE IAS LEARNING
Page 2


GEOGRAPHY 
CRASH COURSE
CAPSTONE IAS LEARNING
Tsunami
• Tsunami is a Japanese word for “Harbour wave”. A 
tsunami is a series of very long-wavelength waves in 
large water bodies like seas or large lakes caused by a 
major disturbance above or below the water surface or due 
to the displacement of a large volume of water.
• Earthquakes (e.g. 2004 Indian Ocean Tsunami), volcanic 
eruptions (e.g. tsunami caused by the violent eruption of 
Krakatoa in 1883), landslides (tsunami caused by the 
collapse of a section of Anak Krakatoa in 2018), underwater 
explosions, meteorite impacts, etc. have the potential to 
generate a tsunami.
Page 3


GEOGRAPHY 
CRASH COURSE
CAPSTONE IAS LEARNING
Tsunami
• Tsunami is a Japanese word for “Harbour wave”. A 
tsunami is a series of very long-wavelength waves in 
large water bodies like seas or large lakes caused by a 
major disturbance above or below the water surface or due 
to the displacement of a large volume of water.
• Earthquakes (e.g. 2004 Indian Ocean Tsunami), volcanic 
eruptions (e.g. tsunami caused by the violent eruption of 
Krakatoa in 1883), landslides (tsunami caused by the 
collapse of a section of Anak Krakatoa in 2018), underwater 
explosions, meteorite impacts, etc. have the potential to 
generate a tsunami.
• Tsunamis are a series of waves of very, very long 
wavelengths
• They travel at high speeds in deep waters, and 
their speed falls when they hit shallow waters.
• Tsunami waves are not noticed by ships far out at 
sea.
• The rate of energy loss of a wave is inversely related to 
its wavelength. So, tsunamis lose little energy as they 
propagate because of their very large wavelength.
Page 4


GEOGRAPHY 
CRASH COURSE
CAPSTONE IAS LEARNING
Tsunami
• Tsunami is a Japanese word for “Harbour wave”. A 
tsunami is a series of very long-wavelength waves in 
large water bodies like seas or large lakes caused by a 
major disturbance above or below the water surface or due 
to the displacement of a large volume of water.
• Earthquakes (e.g. 2004 Indian Ocean Tsunami), volcanic 
eruptions (e.g. tsunami caused by the violent eruption of 
Krakatoa in 1883), landslides (tsunami caused by the 
collapse of a section of Anak Krakatoa in 2018), underwater 
explosions, meteorite impacts, etc. have the potential to 
generate a tsunami.
• Tsunamis are a series of waves of very, very long 
wavelengths
• They travel at high speeds in deep waters, and 
their speed falls when they hit shallow waters.
• Tsunami waves are not noticed by ships far out at 
sea.
• The rate of energy loss of a wave is inversely related to 
its wavelength. So, tsunamis lose little energy as they 
propagate because of their very large wavelength.
Mechanism of Tsunami Waves
Page 5


GEOGRAPHY 
CRASH COURSE
CAPSTONE IAS LEARNING
Tsunami
• Tsunami is a Japanese word for “Harbour wave”. A 
tsunami is a series of very long-wavelength waves in 
large water bodies like seas or large lakes caused by a 
major disturbance above or below the water surface or due 
to the displacement of a large volume of water.
• Earthquakes (e.g. 2004 Indian Ocean Tsunami), volcanic 
eruptions (e.g. tsunami caused by the violent eruption of 
Krakatoa in 1883), landslides (tsunami caused by the 
collapse of a section of Anak Krakatoa in 2018), underwater 
explosions, meteorite impacts, etc. have the potential to 
generate a tsunami.
• Tsunamis are a series of waves of very, very long 
wavelengths
• They travel at high speeds in deep waters, and 
their speed falls when they hit shallow waters.
• Tsunami waves are not noticed by ships far out at 
sea.
• The rate of energy loss of a wave is inversely related to 
its wavelength. So, tsunamis lose little energy as they 
propagate because of their very large wavelength.
Mechanism of Tsunami Waves