From the London Mail:
The deepest earthquake ever detected struck 467 miles (751 km) beneath Japan six years ago, a new study claims. Researchers at the University of Arizona analysed data collected by Japan’s network of seismometers in May 2015 during the Ogasawara earthquake.
The event’s biggest jolt measured magnitude 7.9 on the Richter scale, with an epicenter off the Bonin Islands, also known as the Ogasawara Islands. But a series of less severe aftershocks registered deep in the Earth’s lower mantle, including one that reached a whopping 467 miles deep, where scientists had thought earthquakes ‘unlikely if not impossible’.