A day after yesterday's "biggest quake since 2011's tsunami," at 1:25 local time, Japan was just struck with a massive aftershock in the form of a Magnitude 7.0 earthquake, which means it was roughly 10 times stronger than yesterday's tremor:
- The earthquake was centered just southeast of Kumamoto.
- It struck about at a shallow depth of 10 kilometers.
- A tsunami advisory has been issued for coastal areas.
- Kumamoto is the capital city of Kumamoto Prefecture on the island of Kyushu, Japan.
- As of March 1, 2010, the city has an estimated population of 731,286 and a population density of 1,880 persons per km2
State broadcaster NHK reports that a tsunami advisory is for possible wave of 1 metre in height.
From the USGS: