First, we used the International Disaster Database (EM-DAT) from the Centre for Research on the Epidemiology of Disasters that register disasters based on the following criteria: 10 or more people killed, 100 or more people affected, a declaration of a state of emergency, or a call for international aid.
22 Ndzawulo ya Centre for Research on the Epidemiology of Disasters yi vula leswaku "ku tsekatseka lokukulu ka misava" i ku tsekatseka ka misava loku vangaka xin'wana xa swilo leswi landzelaka: ku fa ka vanhu va khume kumbe ku tlula, ku khumbeka ka vanhu va 100 kumbe ku tlula ni ku tivisiwa ka mhangu yoleyo hi mfumo kumbe ku komberiwa ka mphalalo eka matiko ya misava.