In 1993, marine geophysicists aboard the research vessel Melville discovered 1,133 previously unsupported map underwater volcano off the coast of Easter Island. Although some of the newly discovered volcanoes rose as much as one and a half miles above the seafloor, their summits still remained half a mile below the surface of the water — all in a relatively small area of only 55,000 square miles the size of New York State. Geophysicists have increased the known supply of underwater volcanoes by more than ten per cent only for months. It was 1993. Today, scientists estimate that there are more than three million submarine volcanoes. It — three, followed by six zeroes! In 2007, more hilly oceanographers and Watts examined 201,055 submarine volcanoes. "From this they concluded that an astounding total of 3,477,403 submarine volcanoes must reasonably exist worldwide," said the article by John O'Sullivan. More hilly and Watts "based on the discovery earlier and well respected Earth Observation and Planetary Science specialist, Batiza (1982), who found that at least 4 percent nautical miles — active volcanoes." According to a survey Betizy, Pacific middle plate alone contains an incredible 22 000 — 55 000, that underwater volcanoes, with at least 2,000 of them considered active. Thinking that anyone could know exactly how many volcanoes lies below the surface of the ocean is ludicrous, of course. But those numbers 3,477,403 coming from two well-respected oceanographers, does confirm my point rather nicely, namely, that underwater volcanoes heated sea. Go from 10,000 underwater volcanoes to more than three million in less than 20 years shows how little we knew — and how little we still know — about this incredible force of nature. We know more about the moon.
The Arctic Ocean contains far more underwater volcanoes, and displays more hydrothermal activity than scientists suspected. Look at the ridge Gakkel. Ridge Gakkel — gigantic underwater volcanic mountain chain stretches approximately 1100 miles (1800 km) below the Arctic Ocean from north of Greenland to Siberia. With its summits 3 mile high mountain range Gakkel, the northernmost part of the mid-ocean ridge system, is much more powerful than the Alps. If a single volcano can heat a high-mountain lake to 108 degrees in New Zealand, imagine that eleven hundred-mile-long chain of underwater volcanoes could do in the Arctic Ocean.
Asphalt volcanoes — the ocean floor vents that erupt asphalt instead of lava. They were discovered in the Gulf of Mexico during the expedition of the research vessel SONNE, led by Gerhard Bormann Brinks DFG Research Center Ocean in 2003. In 2007, seven more such structures have been found off the coast of Santa Barbara, California. The largest of these domes is in a depth of 700 feet (213 m). Structure was more than a football field and about as high as a six-story building, all made entirely of asphalt. You do not have to wonder why so many dead fish washed their hands on the California coast. Most of these asphalt volcanoes emit large amounts of methane, along with other underwater volcanic hydrothermal vents — they are the main causes of hypoxia (dead zones) in the oceans, rising temperatures, ocean acidity and deteriorating weather patterns Oscillation (El Nino / La Nina)