Amazon.com’s EC2 service suffered another outage this evening, taking out several high-trafficked Web sites and adding another black eye to the reliability of online services. The outage, which Amazon first reported on its service health dashboard at 7:39 p.m., was resolved as of 8:03 p.m., according to the company.

That’s a relatively short outage. But, as the back-end cloud computing infrastructure provider to thousands of Web sites, any failure by Amazon draws attention. In fact, the Twitter stream has been pretty intense since the outage was first reported.

TechCrunch noted that Instagram, Quora, Foursquare and other sites were hit by the outage.

Interestingly, the Amazon Elastic Compute Cloud, or EC2, facility in northern Virginia appeared to be the source of the problem. That’s also the facility where Amazon encountered problems in April, an outage that took down many Web sites for more than two days.

Previously on GeekWire: Amazon.com’s problem isn’t the outage, it’s the communication

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