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Posts tagged geology

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2 islands merge near Japan

CNN:

NASA’s Earth Observatory reports that Niijima island, a volcano which broke through the ocean’s surface last November, has now merged with a nearby island that formed from a volcano which last erupted 40 years ago.

Niijima emerged about 500 meters (550 yards) from the older Nishinoshima in November. Now, according to observations taken at the end of March, they are one, measuring about a kilometer (six-tenths of a mile) across.

They’ve got some airborne and satellite photos showing the progress of the merging.

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Volcanic eruption raises new island in Pacific's 'Ring of Fire'

Elaine Kurtenbach, AP:

A volcanic eruption has raised a new island, according to earthquake experts and the Japanese coast guard.

Advisories from the coast guard and the Japan Meteorological Agency said the islet is about 660 feet in diameter. It is just off the coast of Nishinoshima, a small, uninhabited island in the Ogasawara chain, which is also known as the Bonin Islands.

The approximately 30 islands are 620 miles south of Tokyo, and along with the rest of Japan are part of the seismically active Pacific “Ring of Fire.”

Japan is very seismologically active due to its sitting on the junction of four different tectonic plates.

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Hawaiian Islands are dissolving, study says

Brigham Young University press release:

Someday, Oahu’s Koolau and Waianae mountains will be reduced to nothing more than a flat, low-lying island like Midway.

But erosion isn’t the biggest culprit. Instead, scientists say, the mountains of Oahu are actually dissolving from within.

According to the researchers’ estimates, the net effect is that Oahu will continue to grow for as long as 1.5 million years. Beyond that, the force of groundwater will eventually triumph and the island will begin its descent to a low-lying topography.

You all better get your sightseeing done now before it’s too late!