China's Shenzhou-21 astronaut crew to stay in space an extra month

China’s Shenzhou-21 astronaut crew to stay in space an extra month

HONG KONG, April 17 (Reuters) – China’s Shenzhou-21 astronaut crew will stay in space for an extra month, after careful ‌consideration from China’s Manned Space Engineering Office, the country’s state ‌broadcaster reported on Friday. The Shenzhou-21 space rocket and its crew blasted off atop ​a Long March-2F rocket from Jiuquan Satellite Launch Centre in northwest…

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Deep earthquakes triggered by the olivine-poirierite transition

Seismicity decreases with depth because elevated confining pressure prevents frictional sliding of faults. However, seismicity tends to increase with depth in the mantle transition zone (depths of 410−600km). It has been believed that pressure-induced phase transitions of olivine in the “cold” subducted slabs is the cause of high seismicity in the mantle transition zone. Source:…

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