Myanmar viral earthquake video shows the first visual evidence of rare seismic phenomena

In May, we reported on a first video of its kind which captured the surface rupture during the earthquake devastating magnitude 7.7 of Myanmar. While the YouTube video now has 1.6 million views, two geophysicists have spotted something that many people have probably not noticed.

The video seems to be a gift that continues to give. As scientists at the University of Kyoto explain in a study published last month in the seismic file, it also includes the first direct visual evidence of impulse -type rupture and a curved flash shift. This means that the two sides of the striking flash flare did not just slip horizontally – the sliding path also plunged down. Although scientists have already deduced the two characteristics of seismic data and post-tronc observations and seismic data, the video provides direct visual evidence.

“Our results provide the first direct visual evidence of a curved coseismic defect shift, to fill a critical difference between seismological observations, geological data and theoretical models,” wrote researchers in the study.

https://www.youtube.com/watch?v=dbeye65eddw

You may be wondering how researchers deduced all this from a very brief video extract. The answer is that they analyzed the movement of the sagaing of myanmar sagaing in the framework of images. With this approach, they discovered that the flaw had slipped laterally 8.2 feet (2.5 meters) in 1.3 seconds, with a top speed of 10.5 feet (3.2 meters) per second.

While the entire lateral movement of the earthquake was normal for the striking shift events, “the brief duration of the movement confirms a pulse-shaped rupture, characterized by a concentrated sliding explosion spreading along the fault, a bit like a undulation that went to a carpet when it was expelled from one end,” of Kyoto, in a university declaration.

The analysis of Kearse and the co-author of Yoshihiro Kaneko also revealed that the sliding path of the failure was slightly curved. This discovery is aligned with curved slides lines – the clichés caused by rocks scratching against each other along a flaw – which the geologists of earthquakes often find after earthquakes. The video provides the first visual proof of the curved shift behind the streaks.

“Instead of things that move directly to the video screen, they have moved a curved path that has a convex upwards, which instantly launched bells that sound in my head,” said Kearse in a declaration of the Seismological Society of America. “The dynamic constraints of the earthquake when approaching and begin to break the fault near the surface of the ground can induce an obliquity in the movement of the fault,” he adds. “These transitional constraints repel the defect of his course planned at the start, then he catches up and does what he is supposed to do, after that.”

More broadly, the North-South rupture of the Myanmar earthquake confirms the previous conclusion of the researchers that the types of sliding curvature depend on the direction of said rupture. Consequently, scientists of earthquakes can study Slicken’s Lines to understand the tremors of revolving earth, potentially informing future risks.

“Together, these results impose critical observation constraints on future break -ups,” conclude researchers in the study, “and deepen our understanding of the physical mechanisms which control the rapid shift in defects during large earthquakes”.