What are the main features of a volcano? What are active, dormant and extinct volcanoes? What are the different types of volcano? What is a supervolcano? Where are volcanoes located? What is the Ring of Fire? What are lahars and pyroclastic flows? Why do people live close to volcanoes? Case Studies The 1980 eruption of Mount St Helens The 1991 eruption of Mount Pinatubo The 2000 eruption of.
Geologic features near Erta Ale, Afar region. Erta Ale is a shield volcano in the Afar region of East Africa. Erta Ale is a remote and rarely visited volcano that is known currently to have an active lava lake in its summit crater. Erta Ale has undergone seven eruption events in the past 125 years. Three of the early eruption dates, 1873, 1903, and 1904 are uncertain.
Technically, the Dotsero volcano in western Colorado is active -- but don't expect to dodge magma on I-70 anytime soon (unless an asteroid hits Colorado -- then you have other problems).
There is a supervolcano in Arizona: The Silver Creek Caldera near the town of Peach Springs. This volcano erupted between 18 and 19 million years ago. The caldera has since been torn in half by.
List of extinct volcanoes includes volcanoes which scientists consider unlikely to erupt again. A volcano which has not erupted in the past 10,000 years is often listed as extinct. The extinct volcano no longer has a lava supply. An extinct volcano is no longer near an active geologic hot spot, if it ever was.
The volcanoes in Alaska make up well over three-quarters of U.S. volcanoes that have erupted in the last two hundred years. Alaska's volcanoes are potentially hazardous to passenger and freight aircraft as jet engines sometimes fail after ingesting volcanic ash.
Exploring the Mysterious Volcanoes of Arizona (Yes, That Arizona) The San Francisco Volcanic Field in Arizona seen from the International Space Station in December 2009. NASA.
Hawaii Volcano Day from Oahu. Oahu Activities - Experience Oahu's one day tour to Big Island Hawaii featuring the Kilauea Volcano. See the sites and destruction of the world's most active volcano, Mt. Kilauea. Erupting continuously since 1983, the life of Kilauea is seen through hardened lava fields, extinct volcanic lava tubes, active steam vents, and the Halema'uma'u Crater.