11 thoughts on “In Japan, Many Undersea Cables Are Damaged”

  1. Satellite links are susceptible to space junk and solar flares, cable links are susceptible to natural disasters such as these. Difficult problems to get around.

    Not sure if this is related but there was a reporter on the local news giving an update from Tokyo via Skype last night and the frame rate and resolution were absolutely terrible. As poor quality as cable news reports in Afghanistan via satphones in 2002-03.

  2. I think posting that traffic graph here is misleading. There is no reason to believe that the decline in traffic is due to undersea cable damage – maybe it has, you know, something to do with the thousands and thousands of people displaced by the disaster, rolling blackouts in other parts of the country, and general disturbance to Japan’s infrastructure.

    I hate misleading crap like this and misuse of technical information.

    1. Clearly the graph states “There is clear decline in Japan’s Internet PERFORMANCE” not “traffic”.

      1. It is a graph of Internet traffic, the title is misleading. Notice that the vertical axis is Gigabits (per second), a unit of traffic.

  3. If the system was designed robustly — and there is every indication that it was — then a shortage of bandwidth is just a nuisance and not a calamity. Given the scope of everything ELSE still going on, I’d say the fact that things are within 10 or 15% of previous levels indicates that there is really NO PROBLEM HERE, or at least not one that is important right now.

    One of the things that struck me in the early hours following the quake was that the communications infrastructure in Japan seemed to still be functioning quite well — and where it failed it was due to a massive spike in demand. At least that’s how it looked from THIS side of the ocean.

    I hope that this small blessing helps the recovery effort in some way, but at the very least it should help stave off cabin fever for millions.

  4. I agree with Maria, Even I learned about theses fact in this post I appreciate Om’s post, even the data of human casualty is not appropriate till now and you have data of cables. It is really great work.

  5. I know my ability to stream television from England to Australia has been almost impossible since last weekend. Stuttering and stop/starting. In Fact its unwatchable. I was wondering if the earthquake had affected it.

  6. Interesting stuff! Question: What is the source of the pictures? Where can I find them in a higher resolution? It’s not really good journalistic style to leave out your sources!…but that is to be expected through the careless “bloggification” of most news websites…

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