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This cooling effect on the ocean surface usually lasts for several years as the lifetime of sulfate aerosols is about 2–3 years. [1] However, in the subsurface ocean the cooling signal may persist for a longer time and may have impacts on some decadal variabilities, such as the Atlantic meridional overturning circulation (AMOC). [1] [2]
Satellite view of a pumice raft from an undersea eruption in Tonga. Volcanic eruptions can have various impacts on maritime transportation. When a volcano erupts, large amounts of noxious gases, steam, rock, and ash are released into the atmosphere; fine ash can be transported thousands of miles from the volcano, while high concentrations of coarse particles fall out of the air near the ...
People living in the Southern Hemisphere experienced purple sunsets for a few months after the eruption. A cooling effect of 0.1–0.5 °C (0.18–0.90 °F) was expected to last until spring (September–November) 2022. [55] The eruption was described as a once-in-a-thousand-year event for the Hunga caldera. [56] [57] [58]
To celebrate World Oceans Day, which takes place on June 8, Google has released a series of new Street View imagery from the world's oceans. 19 of the most mind-blowing Google Street View images ...
Rogue wave – Unexpectedly large transient ocean surface wave; Seiche – Standing wave in an enclosed or partially enclosed body of water; Sneaker wave – Disproportionately large coastal wave; Supervolcano – Volcano that has had an eruption with a volcanic explosivity index (VEI) of 8; Tauredunum event – Ancient Tsunami on Lake Geneva
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A wide variety of volcanic processes can produce tsunamis. This includes volcanic earthquakes, caldera collapse, explosive submarine eruptions, the effects of pyroclastic flows and lahars on water, base surges with accompanying shock waves, lava avalanching into the sea, air waves from explosive subaerial eruptions, avalanches of cold rock, and avalanches of hot material. [1]
Submarine eruptions are volcano eruptions which take place beneath the surface of water. These occur at constructive margins, subduction zones and within tectonic plates due to hotspots. This eruption style is far more prevalent than subaerial activity. For example, it is believed that 70 to 80% of the Earth's magma output takes place at mid ...