Magma is fluid under pressure. Like any fluid under pressure, it tends to seek the shortest and easiest route to lower pressure. read more
They seem to go off right next to each other, if you follow the news, and that is because the news loves to over inflate everything, there are actually dozens of eruptions a year, two happening near to each other is statistically bound to happen often, just like earthquakes. read more
The geology isn’t right for volcanoes there. There were volcanic eruptions in Ireland when Ireland was a lot closer to the spreading center of the Atlantic rift. Ireland is in a very geologically quiet part of the world, now. read more
Of course volcanoes occur on earth. In 2011 there was a huge eruption in Iceland which made world news headlines. read more
Most volcanoes occur in the basin of the Pacific Ocean, also known as the Ring of Fire. Most volcanoes are situated on the edges of tectonic plates. One of the largest of these tectonic plates, the Pacific plate, is the area around which the majority of volcanoes lie. read more