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How do slow anomalies beneath subducting slabs affect giant megathrust earthquakes?

 E-Mail Credit: IOCAS Earthquakes and volcanoes in subduction zones may cause great human catastrophe. Previous studies on subduction zone structure and causal mechanisms of giant megathrust earthquakes (M ≥ 9.0) have mainly focused on aspects like subducting plates and plate interfaces. In contrast, the oceanic asthenosphere structure beneath the subducting slab (at depths of 100-250 km) and its influence on the nucleation of giant megathrust earthquakes have not been well studied. Recently, Dr. FAN Jianke from the Institute of Oceanology of the Chinese Academy of Sciences (IOCAS) and Prof. ZHAO Dapeng from Tohoku University turned their attention to this problem by investigating the oceanic asthenosphere structure of six subduction zones where giant earthquakes have occurred.

Twitter lends name to new species of mite discovered in Japan

Apr 25, 2021 A team of Japanese and Austrian researchers has named a new mite species after Twitter following its discovery through photos posted on the social media platform by an amateur photographer visiting a fishing spot near Tokyo. The new species formally called Ameronothrus twitter was spotted after Satoshi Shimano, a professor who specializes in the study of mites at Hosei University, came across the tweeted photos by chance and then contacted the poster to find out where they were taken. Shimano said the find shows social media can “help speed up the time-consuming discovery of new species” and even “contribute to the development of science.”

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