Volcano an extinct volcano from a dormant (inactive) one. Dormant volcanoes are those that have not erupted for thousands of years, but are likely to erupt again in the future. Volcanoes are often considered to be extinct if there are no written records of its activity. Nevertheless, volcanoes may remain dormant for a long period of time. For example, Yellowstone has a repose/recharge period of around 700,000 years, and Toba of around 380,000 years. Vesuvius was described by Roman writers as having been covered with gardens and vineyards before its eruption of 79 CE, which destroyed the towns of Herculaneum and
Dormant Commerce Clause sanction states acting as "market participants", but it lacks power to legislate in ways that violate Article IV. In the 21st century, the dormant Commerce Clause has been a frequent legal issue in cases arising under state laws regulating some aspects of Internet activity. Because of the interstate, and often international, nature of Internet communications, state laws addressing internet-related subjects such as spam, online sales or online pornography can often trigger Dormant Commerce Clause issues. A "negative" or "dormant" component to the Commerce Clause has been the subject of scholarly discussion for many decades. Both Supreme Court Justices Antonin Scalia