Why do undersea volcanic eruptions and earthquakes cause swells?

Every living thing has its own cycle. Volcanoes don't erupt every day, but they also have active cycles. When the volcano erupts, steam rises into the sky and becomes clouds, which is very beautiful. But why does submarine volcanic eruption also bring disaster? What are the reasons? I believe many friends don't know much about it. Let's answer your question through Bian Xiao.

The submarine volcanic eruption is hidden and sudden, which often brings great disasters to ships sailing at sea. 1952 On September 23rd, a submarine volcano erupted near a reef 225 nautical miles south of Tokyo, Japan. A Japanese research ship found a new island on the sea, with a height of 30 meters and a diameter of 150 meters. A few days later, the island disappeared, but the crater continued to spray, lava flowed into the sea, steam rose into the sky and became clouds. At this time, a hydrological research ship of Tokyo Fisheries Research Institute approached the volcanic eruption area. Just as the crew of the ship began to take photos, measure the power of the volcano and select samples, the volcano erupted violently again, and the research ship was immediately swallowed up by steam and ash. After the volcanic spray dispersed, there was no sign of the ship on the sea. It was not until much later that people found the wreckage of the ship.

In fact, many times, the danger of submarine volcanoes comes not from the volcano itself, but from volcanic eruptions, such as volcanic ash and water vapor. They greatly reduce visibility like "dense fog", making it difficult for ships to continue sailing. Even if it is not swallowed up by volcanic ash, ships sailing under such "dense fog" are prone to run aground, hit rocks, collide and other tragedies.

Relatively speaking, submarine volcanic eruptions rarely cause tsunamis. However, according to the statistics of geologists, in the past 200,000 years, there have been 1 1 huge volcanic eruptions in the Hawaiian Islands in the central Pacific Ocean, Cape Verde and the Canary Islands in the Atlantic Ocean, which triggered landslides and triggered tsunamis. Italian physicist Antonio Zichichi even thinks that submarine volcanic eruption may be one of the reasons for the extinction of dinosaurs. Because the large-scale submarine volcanic eruption affected the thermal balance of seawater, which changed the land climate and finally affected the survival of animals that needed a lot of food, such as dinosaurs.

The above comes from the network.