A number of high-profile websites were knocked offline over the weekend due to large storms and the leap second.
With an extra second added to the world clock, websites including Reddit and Foursquare became unavailable.
They followed both Instagram and Netflix which suffered during a lightning storm across the American east coast that left millions of residents without power and disrupted a cloud storage data centre.
Amazon Web Services was also partially taken down during the storm, along with its back-up generator.
"We will share more details on this event in the coming days," read a company statement.
Following the storms, the addition of an extra second to the world clock in order to compensate for irregularities in the earth's rotation caused more disruption.
The extra second was added to Coordinated Universal Time (UTC) at 23:59:60 and caused issues for a number of websites which heavily rely on synchronised operations.
News aggregator site Reddit suffered problems from the additional second after recovering from the initial storms and the issues caused by them.
Following the problems the site tweeted: "You ever wish you had an extra second or two? This is not one of those times."
Other high profile websites that suffered blackouts include Foursquare, LinkedIn, Gawker and StumbleUpon, along with a number of airline booking systems reporting disruption.
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