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Hawaii hotspot. The Hawaiʻi hotspot is a volcanic hotspot located near the namesake Hawaiian Islands, in the northern Pacific Ocean. One of the best known and intensively studied hotspots in the world, [ 1 ][ 2 ] the Hawaii plume is responsible for the creation of the Hawaiian–Emperor seamount chain, a 6,200-kilometer (3,900 mi) mostly ...
The Hilina slump is sliding seaward on top of the southern flank of the Kīlauea volcano, at an average speed of 10 cm/year (3.9 in/year). Kīlauea is the southeastern portion, about 13.7%, of the Big Island of Hawaii. Compared to the 25,000 to 35,000 cubic kilometers (6,000 to 8,400 cu mi) volume of Kīlauea, the submarine slide is between ...
Hawaiian eruption. A Hawaiian eruption is a type of volcanic eruption where lava flows from the vent in a relatively gentle, low level eruption; it is so named because it is characteristic of Hawaiian volcanoes. Typically they are effusive eruptions, with basaltic magmas of low viscosity, low content of gases, and high temperature at the vent.
A magma chamber is a large pool of liquid rock beneath the surface of the Earth. The molten rock, or magma, in such a chamber is less dense than the surrounding country rock, which produces buoyant forces on the magma that tend to drive it upwards. [1] If the magma finds a path to the surface, then the result will be a volcanic eruption ...
Mount Shasta (/ ˈʃæstə / SHASS-tə; Shasta: Waka-nunee-Tuki-wuki; [5] Karuk: Úytaahkoo) [6] is a potentially active [7] stratovolcano at the southern end of the Cascade Range in Siskiyou County, California. At an elevation of 14,179 ft (4,322 m), it is the second-highest peak in the Cascades and the fifth-highest in the state.
When the magma density matches that of the host rock, buoyancy is neutralized and the magma body stalls. At this point, it may form a magma chamber and spread out laterally into a network of dikes and sills. Subsequently, the magma may cool and solidify to form intrusive igneous bodies . Geologists estimate that about 80% of the magma generated ...
The first — and potentially most dangerous — possibility is that it could be an “intrusion of magma coming from the magma chamber located about 8 kilometers deep,” De Natale said.
Long Valley Caldera is a depression in eastern California that is adjacent to Mammoth Mountain. The valley is one of the Earth's largest calderas, measuring about 20 mi (32 km) long (east-west), 11 mi (18 km) wide (north-south), and up to 3,000 ft (910 m) deep. Long Valley was formed 760,000 years ago when a very large eruption released hot ash ...