Volcano of classifying magmatic volcanoes is by their frequency of eruption, with those that erupt regularly called active, those that have erupted in historical times but are now quiet called dormant or inactive, and those that have not erupted in historical times called extinct. However, these popular classifications—extinct in particular—are practically meaningless to scientists. They use classifications which refer to a particular volcano's formative and eruptive processes and resulting shapes. There is no consensus among volcanologists on how to define an "active" volcano. The lifespan of a volcano can vary from months to several million years, making such a distinction sometimes
Dormant company file their full accounts, regardless of their status. Dormant company In the United Kingdom, a dormant company is a company whose transactions have been limited to payment for shares taken by subscribers to the memorandum of association, fees paid to the Registrar of Companies for a change of company name, the re-registration of a company and filing annual returns and payment made in respect of civil penalties imposed by the Registrar of Companies for delivering accounts to the Registrar after the statutory time allowed for filing. Under the new Companies Act there are exceptions for certain companies. For example, some