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Daniel Aldrich in New Security Beat: Disasters, Vulnerabilities, and Equity: Moving Forward

After examining such networks in Tokyo after the 1923 earthquake, Kobe after the 1995 earthquake, Tamil Nadu after the 2004 Indian Ocean tsunami, and New Orleans post-Katrina, Daniel Aldrich noted that they helped reduce outmigration and keep valuable resources in the area. Other factors such as levels of financial aid and insurance, the efficiency of the governance structure, the levels of destruction, the density of population, and the ratio of inequality also play a part in mitigating or worsening the impact of a disaster.

Social ties tend to reinforce both hard (infrastructure) and soft forms (community mobilization) of resilience in the aftermath of a disaster.