Muswellbrook has been rocked by more than 50 quakes since August that have damaged buildings, but some home owners have had their insurance claims rejected on the basis the issues were “pre-existing”. Muswellbrook has been rocked by more than 50 quakes since August that have damaged buildings, but some home owners have had their insurance claims rejected on the basis the issues were “pre-existing”. Earthquakes, Insurance, Disaster Relief Latest business news