A M6.2 Earthquake hit off the coast of Japan on September 23, 2016.
It was followed by a swarm of 11 smaller quakes right in the same area where the 6.2-magnitude earthquake struck.
According to USGS, a powerful and shallow quake of 6.2-magnitude struck off the coast of Japan at 00:14:34 UTC on September 23, 2016.
The major quake was preceded by 6 moderately-strong tremors ranging between 4.7 and 5.3 in magnitude on the Richter scale.
As shown in the list below, the main seismic event was followed by a series of at least 11 aftershocks also rainging between M4.5 and M5.2:
M4.5 – 119km SE of Hasaki, Japan
M4.9 – 166km ESE of Ohara, Japan
M4.5 – 109km NE of Hasaki, Japan
M5.2 – 167km ESE of Ohara, Japan
M5.1 – 94km SSE of Hasaki, Japan
M4.7 – 142km ESE of Ohara, Japan
M4.6 – 144km ESE of Ohara, Japan
M5.2 – 102km ESE of Katsuura, Japan
M4.6 – 128km SE of Katsuura, Japan
M4.9 – 147km ESE of Katsuura, Japan
M4.5 – 159km ESE of Katsuura, Japan
Is it time for a new catastrophic tsunami?