Io orbits Jupiter at a distance of 421,700 km (262,000 mi) from the planet's center and 350,000 km (217,000 mi) from its cloudtops. It is the innermost of the Galilean satellites of Jupiter, its orbit lying between those of Thebe and Europa. Including Jupiter's inner satellites, Io is the fifth moon out from Jupiter. It takes 42.5 hours to revolve once (fast enough for its motion to be observed over a single night of observation). Io is in a 2:1 mean-motion orbital resonance with Europa and a 4:1 mean-motion orbital resonance with Ganymede, completing two orbits of Jupiter for every one orbit completed by Europa, and four orbits for every one completed by Ganymede. This resonance helps maintain Io's orbital eccentricity (0.0041), which in turn provides the primary heating source for its geologic activity (see the "Tidal heating" section for a more detailed explanation of the process).[27] Without this forced eccentricity, Io's orbit would circularize through tidal dissipation, leading to a geologically less active world.
There are no active volcanoes in Philadelphia, any philharmonic orchestra or called Phil
Approximately 150, with about 60 active ones.
There are about 24 active volcanoes and more than 200 potentially active volcanoes in the Philippines. The country is part of the Pacific Ring of Fire, making it prone to volcanic activity.
Colombia has around 15 active volcanoes and over 140 potentially active or dormant volcanoes.
There are about 169 potentially active volcanoes in the United States. Of these, around 55 are considered to be actively erupting. This includes volcanoes in Hawaii, Alaska, and the Cascades.
Iceland has about 900 volcanoes and 55 are active!
There are no active volcanoes in Philadelphia, any philharmonic orchestra or called Phil
Approximately 150, with about 60 active ones.
There are about 24 active volcanoes and more than 200 potentially active volcanoes in the Philippines. The country is part of the Pacific Ring of Fire, making it prone to volcanic activity.
Colombia has around 15 active volcanoes and over 140 potentially active or dormant volcanoes.
There are exactly 12 active volcanoes on the continent of North America..
There are exactly 12 active volcanoes on the continent of North America..
1500
There are about 169 potentially active volcanoes in the United States. Of these, around 55 are considered to be actively erupting. This includes volcanoes in Hawaii, Alaska, and the Cascades.
300,000
there are 3 active volcanoes
There are around 129 active volcanoes in Sulawesi, Indonesia.