زلزله

Background: Bangkok's urban landscape features approximately 6,000 high-rise towers housing millions of residents in what was historically considered a seismically stable region. However, the March 28, 2025 magnitude-7.7 Myanmar earthquake triggered widespread psychological distress among Bangkok's vertical communities despite causing minimal structural damage. While existing disaster psychology research demonstrates that individual appraisal processes and coping resources influence distress outcomes, high-density vertical urban environments remain largely unexplored in disaster literature, particularly within Asian megacities where socioeconomic inequities may compound vulnerabilities. Aims: This study aimed to quantify earthquake-related emotional distress changes, evaluate the effectiveness of different coping strategies, examine socioeconomic and disability-related moderators, and test Transactional Model of Stress and Coping pathways among Bangkok's high-rise population. Methods: A cross-sectional web-based survey was conducted two weeks post-earthquake using multistage stratified probability sampling. From 120 randomly selected buildings across Bangkok's districts, 5,200 households received survey invitations, yielding 2,104 completed responses (40.5% response rate). Participants were adults residing at least six months in buildings exceeding eight floors. Validated Thai-adapted instruments included the Kessler-6 for psychological distress, Insomnia Severity Index, and custom scales measuring emergency preparedness, social support-seeking, and self-care behaviors. Statistical analyses employed paired t-tests, ANOVA, MANOVA, and bootstrap mediation procedures with effect size reporting. Results: Clinically significant insomnia prevalence increased from 27.4% to 61.8% post-earthquake. Emergency preparedness behaviors were associated with lower anxiety levels, while social support-seeking correlated with reduced insomnia severity. Significant disparities emerged across housing tenure, income levels, and disability status, with renters demonstrating lower preparedness rates than homeowners (54.6% versus 71.9%). Mediation analyses revealed that preparedness and support-seeking behaviors collectively explained 37.7% of the association between perceived seismic threat and psychological distress outcomes. Conclusion: Perceived earthquake threat, rather than actual structural damage, emerged as the primary driver of psychological distress in Bangkok's high-rise communities. While emergency preparedness and social support provided substantial protective effects against anxiety and insomnia, these resources were inequitably distributed across socioeconomic groups. These findings highlight the critical need for inclusive disaster preparedness policies that address structural barriers affecting vulnerable populations in rapidly urbanizing megacities facing emerging seismic risks.