This research, contrasted households in California (high seismic risk) with households in Washington (moderate seismic risk) and identified factors that influenced their adoption of 16 earthquake hazard adjustments measured at two points in time (1997 and 1999). It explains the effects of self and family, friends, news media, employers, local, state, and federal governments by addressing three key attributes - knowledge, trustworthiness, and responsibility for protection-ascribed to them in influencing households to take protective actions against earthquakes. It is specifically concerned with the effects of nested interactions between stakeholder attributes and self reported adoption of earthquake hazards adjustments due to trust and power differentials between seven community stakeholders. Key findings suggest that hazard intrusiveness, hazard experience, and stakeholder knowledge, trustworthiness, and responsibility affected the increased adoption of seismic hazard adjustments by households. Particularly important were the peer groups' (employers, friends and family) knowledge, trustworthiness and responsibility.