Shieldvolcanoes build up slowly by the growth of thousands of lava flows that spread widely over great distances, and then cool as thin sheets. On Earth, some of the most massive volcanoes are shield volcanoes. In northern California and Oregon, many shield volcanoes are up to 3 or 4 miles wide and as tall as 1,500 to 2,000 feet.

Structuralgeology The tectonics processes in Indonesia formed major structures in Indonesia. The most prominent fault in the west of Indonesia is the Semangko Fault or the Great Sumatran Fault, a dextral strike-slip fault along Sumatra Island (about 1,900 km).

Answerand Explanation: 1. One of the main reasons why magma rises is that it is less dense than compared to the rock around it. It becomes less dense that the solid rock around it because gas bubbles from within the Earth are trapped inside the liquid rock. Gas is less dense than solid rock, and thus it in turn makes the magma less dense than Anumber of volcanoes around the world continuously exhale water vapor laced with heavy metals, carbon dioxide, hydrogen sulfide and sulfur dioxide, among many other gases. Of these, sulfur dioxide is the easiest to detect from space. In a new study published in Scientific Reports ( DOI: 10.1038/srep44095) this week, a team led by researchers
47 The weird thing about volcanic activity in the Western United States is that it's actually quite difficult to explain. The Cascade volcanoes of the Pacific Northwest are one thing—standard
TheRing of Fire is a 25,000 mile (40,000 km) horseshoe-shaped area of intense volcanic and seismic activity that follows the edges of the Pacific Ocean.Receiving its fiery name from the 452 dormant and active volcanoes that lie within it, the Ring of Fire includes 75% of the world's active volcanoes and is also responsible for 90% of the world's earthquakes.
Whydoes Japan have so many earthquakes? Japan's high number of earthquakes is due to its geographical location along the Pacific Ring of Fire (環太平洋火山帯, kantaiheiyoukazantai). This 40,000 km long chain consists of at least 450 volcanoes.
34 Java is the most populated island in the world, with 141.4 million residents. However, it is smaller than many other islands. There are other islands, such as Madagascar, Borneo, Sulawesi, Honshu (Japan), and Sri Lanka, which I would expect to have a higher population than Java. There are many other islands which have tropical climates and Nevadodel Ruiz, Colombia. Eighty miles west of Bogotá, Colombia, Nevado del Ruiz volcano stretches more than 17,000 feet into the air. The volcano is considered one of the most dangerous in the BgIFW4l.
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    • why does indonesia have so many volcanoes