Table 2 Classification labels for the 24 major earthquakes

A1

1

7.3

2000 Tottori

A2

4

7.1

2004 Kii Peninsula 1

2

7.3

2001 Yonaguni Island inshore

5

7.4

2004 Kii Peninsula 2

3

8

2003 Tokachi-oki

6

6.8

2004 Chuetsu

7

7

2005 Fukuoka

14

7.3

2011 Tohoku 1

8

7.2

2005 Miyagi

22

6.5

2016 Kumamoto 1

9

6.9

2007 Noto

23

7.3

2016 Kumamoto 2

10

6.8

2007 Chuetsu offshore

B

15

9

2011 Tohoku 2

11

7.2

2008 Iwate-Miyagi Nairiku

16

7.4

2011 Iwate offshore

12

6.5

2009 Shizuoka

17

7.6

2011 Ibaraki offshore

13

7.2

2010 Ryukyu Islands

18

7.5

2011 Sanriku offshore

19

6.7

2011 Nagano

20

7.2

2011 Miyagi

21

7

2011 Fukushima

24

7.4

2016 Fukushima