A note for those who have not been in Japan for long. Big earthquakes are often double quakes, the first is usually smaller than the second.
That is what happened in Noto, Ishikawa prefecture in January, and that is what happened in Tohoku and Fukushima in 2011, because Japan entered a period of brisk seismic activity and several powerful temblors following the Great Hanshin Earthquake in 1995.
The first quake(s) often have a destabilizing effect, and then the big earthquake strikes hard.
Those first couple of pre-quakes, however, are usually magnitude 5 or higher **like the quake today in the morning**.
Even if one of these comes and is over, don’t breathe a sigh of relief. It’s still advisable to exercise caution.
While for many it isしょうがない business as usual (good or bad up to the reader’s discretion), disaster and seismic research have pretty accurate predictions especially about Nankai Through seismic activity (affecting the highly likely potential next Kanto earthquake of the century and tsunami).
by taiyokohatsuden