Post Reply - Japan mega-quake alert

   https://www.japantimes.co.jp/news/2024/08/08/japan/nankai-earthquake-alert/ or https://www.japantimes.co.jp/news/2024/08/08/japan/nankai-earthquake-alert/ ;
The Meteorological Agency on Thursday issued its first-ever alert warning about a possible megaquake around the Nankai Trough, following a magnitude 7.1 quake that struck earlier in the day off the coast of Kyushu.
It is believed that the chance of a major earthquake occurring in the Nankai Trough is relatively higher than usual, according to the agency, but it added that this does not mean an earthquake will necessarily occur within a specific timeframe. The warning is expected to be in place for a week, but officials said residents should not let their guard down even after it is lifted.

see also https://earthquake.usgs.gov/earthquakes/eventpage/us6000nith/executive or https://earthquake.usgs.gov/earthquakes/eventpage/us6000nith/executive ;
M 7.1 - 20 km NE of Nichinan, Japan
2024-08-08 07:42:55 (UTC)
31.719°N 131.527°E
25.0 km depth
DJ, https://www.futurelearn.com/info/courses/extreme-geological-events/0/steps/62699 or https://www.futurelearn.com/info/courses/extreme-geological-events/0/steps/62699 ;
that earthquakes with a magnitude larger than 8 can be considered as megaquakes.