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
Active shooter and fails to grasp the nature of the threat involved. For civilians, when necessity or obligation calls, the tactical mandate is to attack the attacker—a strategy that has proved successful across a range of incidents from Norina Bentzel (William Michael Stankewicz) in Pennsylvania and Bill Badger in Arizona (2011 Tucson shooting) to David Benke in Colorado. The active shooter incidents do not always meet the classification of a mass murder. Mass murders result when three or more individuals are killed. The definition of an active shooter does not require that victims are killed, only that they are injured or wounded