Friday's massive earthquake is yet another challenge to Japan's recovery but it may provide a jolt to the economy over the short term, Lawrence Summers, president emeritus of Harvard University and former director of the White House National Economic Council, told CNBC.
The biggest earthquake in 140 years hit Japan Friday, triggering 10-meter high tsunami waves.
"If you look, this is clearly going to add complexity to Japan's challenge of economic recovery," Summers said. "It may lead to some temporary increments, ironically, to GDP, as a process of rebuilding takes place."
After the Kobe earthquake in 1995 Japan actually gained some economic strength due to the process of reconstruction, he added.
The global economy is more resilient than many people think and is not likely to be massively affected, he said, recalling that the events in the fall of 2008 were "traumatic" but the global economy recovered faster than expected.
"I think one has to recognize always and especially right now that there are an impressive magnitude of uncertainties," Summers said "I'm relatively optimistic because I believe there is substantial energy in emerging markets, because I believe in the US the consumer is starting the process of coming back," he added.