Two tsunamis: Ring of Fire - tectonic journeys in East Asia
HTML-код
- Опубликовано: 6 май 2024
- The 2004 Indian Ocean ("Boxing Day") tsunami was the world's worst geo-disaster... but there was another one just three months later. Follow the geological reasons behind these two tsunamis, find out why they were so different, despite originating in a similar location, offshore Sumatra.
#geology #tectonics #ratw #tsunami #Sumatra #kophiphi #2004tsunami #indianocean
You mentioned casualties in different places and country, but you missed out on recognizing the huge number of lives lost in Aceh and North Sumatra tho.
A quarter million of people lost their lives in those areas due to this terrible disaster, why you don't mention it:(?
You make a fair point - it was a terrible disaster (indeed both tsunamis hit the people of N and NW Sumatra). Hopefully pan-ocean and international monitoring coupled with better warning systems will mean that the impacts of future tsunamis on coastal populations will be minimised...
It would be great also if you can do a comparison between the 2011 Japan earthquake and tsunami with the 2004 Indian Ocean Earthquake and Tsunami. Many thanks!
It was the first video in this series: Ring of Fire etc. on megathrust earthquakes - which deals with the 11 March 2011 earthquake and tsunami. Check out
ruclips.net/video/dbvFaeUf-6M/видео.html
@@robbutler2095 Many thanks again for your prompt reply. Much appreciated.
@@MrTomcat104 Naah.. It was closer to Indonesia than India, and Indian have nothing to do with the ocean south of them..
So here in Nusantara we just call it Indonesian Ocean or Indocean, because you know that archipelago actually connecting the Pacific and Indocean, and anything happened there whether it's a tsunami, earthquake or a hurricane we just call it Indocean Tsunami, Earthquake or Indocean Hurricane..
I remember that day. It was a Poya day in Sri lanka. Buddhist holiday. My mom woke me up saying, "Come look at news. Sea is coming to land. " We, sri lankans, had never heard about Tsunami nor we had experienced any earthquakes since we are in the middle of Indian plate. So when the sea retreated, village people went in to check and divide the new land. There was some horrible sights recorded. People hanging on to each other at Galle bus station. One by one carried away by the water.
Yes - totally shocking. The world should at least be better prepared now. Thank you for sharing your story.
Isn't the impact of a tsunami also dependent on the local bathymetry of a coastline? How shallow the water is, how broad (or narrow) the continental shelf is off the coast, the angle of the underwater slope, whether coastline is straight and smooth or irregular with bays/coves, barrier islands, tombolo, tied island or headlands? Because I remember the footage of the 2004 Indian Ocean tsunami shows how in some cases the tsunami resembles a rapidly rising tide or tidal bore without a breaking wave, and in other cases, there was a breaking wave in the form of a towering wall of water, followed by the rush of water from the tsunami run-up.
Yes absolutely - on a large scale look at the main images of arrival times /run run heading down the Malacca Strait ... local near offshore is important for amplifying the ocean-transiting waves and by slowing the wave front, the water behind can pile up....
@@robbutler2095 Fascinating info. Thanks again.
So horrible disasters tsunamis are! Tsunamis are actually a process in which energy is released through seawater, much like splashing water in all directions when cold water is poured into a hot pot. I understand what you said about the former occurring under the sea and the latter on land, hence the former tsunami is larger. There is actually another reason you didn't mention or I didn't hear clearly, which is that the local crust here is of a thrust nature. It's like a tightly capped beer bottle that will fly off once opened with a bottle opener. This is completely different from the situation in Iceland. Therefore, earthquakes that can cause significant disturbances in the submarine lithosphere are also likely to trigger tsunamis.
The principal tsunami risk is indeed associated with thrusts - megathrusts - or subduction zones. Certainly both Indian Ocean ones and 2011 Tohoku : check out: ruclips.net/video/dbvFaeUf-6M/видео.html