1/3/2023 0 Comments Map of vile vortices![]() ![]() "The discovery of a conjugate system of faults in the Wharton Basin intraplate deformation zone" 2. And then, of course, on the other side of that, things start aging again." But alongside Sumatra, the crust is much younger, as young as 45 million years old. South of western Java, it’s younger, maybe 80 million years old. ![]() “South of eastern Java,” Dr Dyment said, pointing to a brightly coloured map on his computer, “the lithosphere is about 120 million years old. "One of the root causes of all this activity could be the age of the lithosphere, that ever-spreading, always-moving seafloor crust. This resistance may be one explanation for the recent strong earthquakes this area has been experiencing over the past several decades. This screen shot from Dr Jerome Dyment’s computer shows how younger, more buoyant lithosphere is resisting subduction west of Sumatra. “The 2012 earthquakes then created seismic movements so large that they may have caused even more stress to the subduction zone." "“It seems to me that the M 9.2 earthquake in 2004 induced enough stress on the Indo-Australian plate that it may have triggered the 2012 earthquakes,” Dr Hananto said. The sizes of these earthquakes were big - the M 8.6 was the largest intraplate earthquake ever recorded,” said Dr Hananto." ![]() "“The Wharton Basin is an important geological site because in 2012 we had two very large earthquakes, M 8.6 and M 8.2, occur there. I first had to locate each of these places, some I knew about and some were not quite what I had thought they were. I found the earliest version of the image and added higher quality text. I had this old image saved back in 2014, and today I decided to make a higher quality version. ![]()
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