The “invisible” hybrid earthquake caused a big tsunami in 2021, scientists say

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https://sputniknews.com/20220213/invisible-hybrid-earthquake-caused-massive-tsunami-in-2021-scientists-say-1092995602.html

The “invisible” hybrid earthquake caused a big tsunami in 2021, scientists say

The “invisible” hybrid earthquake caused a big tsunami in 2021, scientists say

The magnitude 8.2 earthquake occurred about 15 km below the surface of the earth. 13.02.2222, Sputnik International

2022-02-13T18: 39 + 0000

2022-02-13T18: 39 + 0000

2022-02-13T18: 39 + 0000

Technology

earthquake

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Scientists were finally able to identify the elusive earthquake that caused a tsunami that stretched thousands of kilometers from the epicenter to the North Atlantic, Pacific, and Indian waters in August 2021. As LiveScience explains, scientists initially said that the tsunami in question was a magnitude 7.5 earthquake near the South Sandwich Islands in the South Atlantic, causing the epicenter to be too deep to cause a tsunami (about 47 km below the seafloor). It was like a rupture of the structural plate that caused it. (400 km long) “Must have caused a much larger quake.” A new study published earlier this month in the Geophysical Research Letters Journal found that the quake was actually a sequence of five “sub-earthquakes” and a tsunami. It suggests that there was. It was caused by a third earthquake – a magnitude 8.2 “invisible” earthquake that occurred 15 km below the surface of the earth. The quake was ah, so it seems that we could avoid detection for a long time. A hybrid of a deep rupture and a slow tsunami-generated slip-type marine earthquake. The latter is often difficult to detect, even though it can emit “structural energy as much as a major earthquake”.

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Technology, earthquakes, tsunamis, research

Andrey Dargarin

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The magnitude 8.2 earthquake occurred about 15 km below the surface of the earth.

Scientists were finally able to identify the elusive earthquake that caused thousands of kilometers of tsunamis from the epicenter to the North Atlantic, Pacific and Indian Oceans in August 2021.

As Live Science explains, scientists initially believed that the tsunami in question was caused by a magnitude 7.5 earthquake detected near the South Sandwich Islands in the South Atlantic, but the epicenter was too deep. The tsunami could not be triggered (about 47 km under the seabed) floor), and the type of structural plate rupture (400 km long) that caused it “should have caused a much larger earthquake.”

A new study published earlier this month in the Geophysical Research Letters journal found that the quake was actually a sequence of five “sub-earthquakes” and that the tsunami was caused by a third magnitude 8.2 “invisible” quake. It has been suggested. It occurred 15 km below the surface of the earth.

“The third event was special because it was huge and quiet,” Zhe Jia, a seismologist at the California Institute of Technology, said in a statement. “In the data we usually see [for earthquake monitoring]I could hardly see it. “

The earthquake was a hybrid of deep rupture and a slow-occurring slip-type marine earthquake, so it seems that detection could be avoided for a long time. The latter is “often difficult to detect, even though it can emit as much structural energy as a high earthquake. Magnitude earthquake.”

“We think these complex quakes caused quakes, ‘Oh, it wasn’t that big, so don’t worry,’ and the tsunami struck and caused a lot of damage.” Told. “This study is a great example of how to understand how these events work and how to detect them more quickly so that we can issue more warnings in the future.”

https://sputniknews.com/20220213/invisible-hybrid-earthquake-caused-massive-tsunami-in-2021-scientists-say-1092995602.html The “invisible” hybrid earthquake caused a big tsunami in 2021, scientists say

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