Fig. 7From: Mobile phone data reveals the importance of pre-disaster inter-city social ties for recovery after Hurricane MariaIllustration of the approximations of population recovery times. a Exponential fitting model based on insights from (Yabe et al. 2019). The parameter that characterizes the model is τi. b Recovery curve fitted to linear functions. The parameter that characterizes the model is βi. c Recovery time defined as the timing \(T_{i}^{\alpha }\) that Mi(t) exceeds \(M_{i}^{\alpha }\) which is characterized by constant parameter αBack to article page