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
Buddha-nature this lifetime through chanting the name of the Dharma of the Lotus Sutra: "[T]the Buddha nature within us is summoned forth and manifested by our chanting of Nam-myoho-renge-kyo." The potential for Buddhahood exists in the whole spectrum of the Ten Worlds of life, and this means that all people, including evil doers, have Buddha nature, which remains as a dormant possibility or a theoretical potential in the field of emptiness or non-substantiality until it is materialized in reality through Buddhist practice. In his letter "Opening the Eyes of Wooden and painted Images" Nichiren explains that insentient matter (such as trees,