Scientists have discovered the “deepest earthquake ever”, which occurred 467 miles (751 kilometers) under the Earth’s surface, the first discovery at this depth, according to research published by the ” Science Alert ” website .
Scientists had not previously expected that there would be an earthquake at this depth, because of the intense pressures, which usually lead to “bending and deformation” in the rocks, rather than breaking them due to “sudden energy.”
The research, which contains information on the deepest earthquake, was first published last June in the journal Geophysical Research Letters , an aftershock of a 7.9-magnitude earthquake that shook the Bonin Islands archipelago, off mainland Japan, in 2015.
Researchers led by University of Arizona seismologist Eric Kayser discovered the deepest quake using Japan’s HiNet, a sophisticated network of earthquake-detecting stations.
This Japanese network is the “most powerful earthquake detection system” currently in use, said John Vidal, a seismologist at the University of Southern California, who was not involved in the research.
He pointed out that “the depth of the earthquake still needs to be confirmed by other researchers, but the result appears to be reliable.” He stressed that the researchers “did a good job, and they are probably right”, referring to the depth of the earthquake (751 km).
This earthquake is considered special, because earthquakes are usually shallow, are felt, and occur at a depth of no more than 100 km, according to Sens Alert.
Whatever the cause of this deep earthquake, it is not likely to be repeated often, said Heidi Houston, a geophysicist at the University of Southern California, who was not involved in the research.