At 14:15 Beijing time on July 29, a strong earthquake of magnitude 8.2 on the Richter scale occurred near the Aleutian Islands in Alaska, usa, which triggered a tsunami warning along the Pacific coast, including the United States, Canada, Russia, North Korea, South Korea and Japan, and is expected to reach Japan in 6 hours and the east coast of China in 9 hours.
However, according to CNN, the tsunami warning was then canceled, but San Francisco officials still warned residents to stay away from the coastline. There were at least 61 aftershocks since the quake, but most of them were around magnitude 4.
<h1 class="pgc-h-arrow-right" data-track="3" > magnitude 8.2 earthquake: The Pacific Rim seismic belt begins to be active</h1>
The epicenter of the earthquake was located in the Pacific Ocean, about 280 kilometers southeast of Kodiak, at 55.40° north latitude and 158.00° west longitude, with a focal depth of about 10 kilometers, originally reported to be 8.1 magnitude, and then revised by the USGS to 8.2 magnitude, which is a super-strong shallow source earthquake, if it occurs in a densely populated area, the consequences are unimaginable.
Surprisingly, this 8.2 magnitude strong earthquake actually did not cause a tsunami, with the occurrence of strong earthquakes, NOAA's tsunami warning was issued at the same time, as can be seen from the tsunami warning information, it can reach the west coast of Canada within 3 hours, reach the Russian Kuril Islands and the Japanese archipelago and the Coast of California in the United States within 6 hours, and reach China and the South Pacific Islands in 9-12 hours.
But even the Alaska coast near the epicenter was hit by only 1 foot (0.3 meters) of "tsunami," which is a bit of a surprise, maybe this earthquake is special? Of course, it's good that there is no tsunami, and we don't need to dwell too much.
The Aleutian Islands, where the epicenter is located, is the scope of the Pacific Rim seismic belt, and the world has not had a strong earthquake of more than 8 magnitude for more than 2 years, which can't help but make everyone mutter, whether the 8.2 magnitude earthquake will make the seismic belt along the Pacific coast come back alive, once it is active, it is estimated that the world will tremble.
Because the Japanese archipelago, Alaska, central And South America and the west coast of South America, as well as the South Pacific New Zealand and Southeast Asia, are all on this Pacific Ring Seismic Belt, will there really be a global earthquake in the future? Another speculation has been slowly fermenting, the United States' Yellowstone volcano will not wake up because of this, which is the melon-eating masses are most worried, because as far as the global scope is concerned, the Yellowstone volcano belongs to the king explosion level, once it erupts, it is estimated that half of the United States will disappear.
Wang: Will Yellowstone Volcano awaken?
No one knows if Yellowstone will wake up, but at least one thing is certain, Yellowstone has nothing to do with the Alaska earthquake, because the distance between the two is too far, the initial estimate is about 3500 kilometers, and the Yellowstone volcanic principle around the Pacific earthquake and the volcanic belt are unlikely to be linked.
However, in May this year, there were 288 earthquakes in the Yellowstone Park area, according to USGS data, 12 earthquakes broke out in Yellowstone On May 4, 39 on May 22, and 100 more on May 29, so the earthquake continued until late June, whether such frequent earthquakes would wake up the Yellowstone Volcano has been unknown.
How powerful is The Yellowstone Volcano? Why is it called the King Exploding Volcano?
Yellowstone Volcano is still active and most likely to erupt in the world's largest volcano, located in the northwest corner of Wyoming, the U.S. State of Wyoming, the crater is 55 kilometers wide, 72 kilometers long, a nearly 4,000 square kilometer crater, erupted 2.1 million, 1.3 million and 640,000 years ago, in time, now almost within this critical point.
Once erupted, it was 2,500 times larger than Mount St. Helen, which erupted in 1980, with ash covering about 75 percent of the U.S. soil, and ash entering the stratosphere in large quantities, triggering global meteorological disasters that could cause Xiaoice periods, like the cold periods of the Ming and Qing dynasties, or the summerless years after the eruption of Mount Tambora, which could be several years long.
The yellowstone volcano is so large because it is connected to a giant magma pool underneath it, which has been accumulating for about 600,000 years, and the topography of the Yellowstone crater has long been closely monitored, although it is not known when it will erupt, but at least not now.
In 2017, NASA conducted a study on the topic of "whether it can stop the eruption of Yellowstone", and USGS scientists believe that as long as the magma chamber can be cooled by 35%, it can prevent its eruption, and the method is to inject a large amount of high-pressure water 10 kilometers underground, and recover this high-temperature steam, circulating back underground.
Sound familiar? Once successful, the United States will have access to an unprecedented super geothermal power station, much larger than the installed capacity of all geothermal power plants in Iceland combined, and NASA has estimated its construction cost, about $3.46 billion, which does not seem to be high, and it is almost the same as bombing a few times.
But Brian Wilson, a spokesman for the Jet Propulsion Laboratory, also said it could backfire and could have caused the volcano to erupt early.
Relive the spectacular scene from 2012: the Yellowstone eruption
Whether it erupts or not, at least it has nothing to do with this 8.2 magnitude earthquake in Alaska!!
#头条辟谣 #