In fall of 2010, six to nine months after the eruption ended, all consenting participants received a questionnaire, containing questions on physical and mental well-being (General Health Questionnaire-12-item version (GHQ-12), Perceived stress scale (PSS-4) and Primary care PTSD (PC-PTSD)).
Haustið 2010 fengu allir þátttakendur senda spurningarlista með spurningum um líkamlega og andlega líðan (General Health Questionnaire-12-item version (GHQ-12), Perceived stress scale (PSS-4) og Primary care PTSD (PC-PTSD)).