Before revision: After 10 years of flawless operation, a light earthquake that caused no damage on January 30, 2009 the network's automatic notification failed, but was fixed within URL Another light earthquake that caused no damage in February 2015 showed that the present architecture of the network results in a significant delay in the early warning notification feature, depending upon the location of the quake URL which is the reason the network is being improved to operate the ShakeAlert system .
After revision: After 10 years of flawless operation, a light earthquake that caused no damage on January 30, 2009 the network's emergency notification URL A magnitude 4.3 earthquake in February 2015 showed that the present architecture of the network results in a significant delay in the early warning notification feature, depending upon the location of the quake URL which is the reason the network is being expanded .