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Hurricane Sandy: Initial Impact


Yesterday, Hurricane Sandy came ashore pummeling the east coast of the United States with high winds and torrential rains. The super storm caused major power and Internet outages in a region that is home to more than 60 million people. Unsurprisingly, the impacts on Internet connectivity have been severe. For instance, several major data centers in Manhattan lost power or were flooded.Besides all the local impacts to the United States, New York City also happens to be a major hub of international telecommunications. As a result of outages there, we’ve observed Internet traffic shift away from the city as carriers scramble for alternative paths.

sandypanels-qsize.png As with Irene last year, we were in the path of this storm. In fact, our data center in Portsmouth, New Hampshire experienced multiple power outages in the last 12 hours. Despite this, our exceptional operations staff have continued delivering our services and products without interruption to our customers around the world.The graphic on the left illustrates the locations of some of the Internet outages we observed in the impacted region at various points in time over the last 30 hours. Notice how New York and New Jersey bore the brunt of the damage as the storm progressed.

Our Internet Health Portal (IHP) provides detailed reports about the current state of the Internet for any region in world. A screenshot from this tool is pictured on the right, showing outages by county in New York State. Impacted networks are identified by geolocation, organization, and severity, allowing for detailed assessments of natural disasters and, hopefully, more targeted remediation efforts.This blog represents a quick overview of our data around this event. As we continue to examine the impacts of the hurricane and the recovery efforts, we will post additional findings. Stay tuned.

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  • ハリケーンでNY周辺のネットワーク停止が多発

    ハリケーン「サンディ」によって発生したネットワーク停止の統計記事。 Hurricane Sandy: Initial Impact – Renesys Blog リンク先には地図上に停止箇所をマップしたものもある。 ニューヨーク州を中心に最大2千ネットワークが停止したらしい。 マンハッタンで多くのデータセンターが停電と浸水に見舞われたとのこと。 通信ハブとなっているNYの惨状に、トラフィックの大規模な迂回が観測されたともある。 NY証券取引所が2日連続閉鎖になったのは100年以上ぶりともきいたけど。…

  • Marco

    Thank you for this analysis. I have a doubt regarding: “As a result of outages there, we’ve observed Internet traffic shift away from the city as carriers scramble for alternative paths.” Can you give us more information about these traffic shifts? Did it happen pre-emptively or after the disaster?

  • This is an excellent question. At this point the shifts we’re seeing appear to occur as power outages and Internet outages were hitting NY/NJ area.
    We’re preparing another blog post this week to answer the question of how NYC’s role as a core hub of the Internet was affected by the Hurricane. Please please check back or subscribe to our blog via RSS.

Whois: Doug Madory

Doug Madory is a Director of Internet Analysis at Dyn where he works on Internet infrastructure analysis projects. Doug has a special interest in mapping the logical Internet to the physical lines that connect it together, with a focus on submarine cables.