Ontario quake rattled websites more than the ground
Parliamentary security guards stop construction workers from returning to their work site after Parliament buildings were evacuated following an earthquake in Ottawa, Wednesday June 23, 2010. (THE CANADIAN PRESS/Adrian Wyld)
OTTAWA - The June earthquake that shook parts of Quebec and Ontario rattled more than just the ground.
Within minutes of the 5.0-magnitude quake, people were furiously posting accounts on social media sites like Twitter, but official information was impossible to access online.
Natural Resources Canada's earthquake information site was paralysed by demand, documents released under Access to Information show.
The agency was so overwhelmed with people trying to access the site that it had to enlist the help of the U.S. Geological Survey to get the information out to Canadians.
The crash sent staffers scrambling for more than two hours to find a temporary solution and it took four hours before the whole site was back in full working order.
An official with Natural Resources Canada admitted the crash raised questions about how well prepared the agency was to communicate with Canadians online in the event of a sudden natural disaster like an earthquake or tsunami.
But in terms of its timing, lack of major damage and the area it affected, the quake was the worst-case scenario for website managers, said David McCormack, program manager for Canadian Hazards Information Systems. It happened in the middle of a workday and was felt in several major cities.
"If you made it 10 times as big, then in big chunks of probably eastern Ontario and western Quebec there wouldn't have been a lot of computer traffic because there would have been damage to the networks and damage to the power system," he said.
"There was none of that, so everybody's computers were just running as normal so if you put all those reasons together it became almost a perfect storm of demand."
An estimated 20 million people in Ontario, Quebec and the U.S. felt the quake, but there were only reports of minor property damage.
McCormack said that technical planning for communications in the event of an earthquake is a different challenge for Natural Resources than it is for other government agencies who sometimes experience surges in online demand.
Revenue Canada, for example, has a series of backups in place to handle the crush when everyone tries to go online to file their taxes on deadline.
Usually, the Natural Resources web server can handle about a million hits an hour, he said, but in a rare event like a quake that doesn't matter.
"The traffic flow essentially goes from zero to everybody wanting it at once as soon as they feel the earthquake," McCormack said.
"So you can have changes in traffic flow that can be hundreds of thousands or even millions of times what you normally expect to get."
The first thing officials did was strip out all the unnecessary features on the site and disable anything like graphics that ate up bandwidth as they raced to double the capacity of their servers.
Four hours later, the site was back up and working.
A month later, the agency had a chance to test their new system when a 4.1-magnitude earthquake struck between Quebec City and Trois Rivieres. The website had over a million hits but remained functional, McCormack said.
"If the June event occurred again today we would be able to service the traffic," he said.
"What we need to make sure is that under any realistic scenarios we wouldn't find ourselves in that same situation again."
The agency is exploring a better long-term solution.
"It gets to the point where it isn't sensible to just keep throwing more and more hardware at it for events which happen very rarely," he said.
The department is talking to commercial providers who specialize in providing back-up capacity for major events and whose services would only kick in when needed.