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Table 1 Earthquakes for which aftershock delay times are examined

From: Earthquakes in Oita triggered by the 2016 M7.3 Kumamoto earthquake

Date Location Mainshock The largest aftershock The earliest M ≥ 4 aftershock
The earliest M ≥ 5 aftershock The earliest aftershock
M M Delay (h) Distance (km) M Delay (h) Distance (km)
07-01-1995 Off Iwate pref. 7.2 6.2 3.975 11.7 4.0 0.127 3.9
    6.2 3.975 11.7 4.0 0.127 3.9
17-01-1995 Kobe 7.3 5.4 1.862 42.8 4.4 0.040 4.7
    5.2 0.059 10.8 4.4 0.040 4.7
04-12-1995 SE off Etorofu 7.3 6.7 0.224 52.9 6.1 0.158 36.9
    6.1 0.158 36.9 6.1 0.158 36.9
26-03-1997 NW Kagoshima pref. 6.6 4.9 0.121 1.7 4.9 0.121 1.7
       3.1 0.057 1.7
13-05-1997 Satsuma, Kyusyu 6.4 5.1 17.894 4.2 5.1 17.894 4.2
    5.1 17.894 4.2 2.8 0.131 8.5
25-06-1997 N Yamaguchi pref. 6.6 4.3 6.743 0.4 4.0 0.136 3.4
       2.7 0.068 6.8
04-05-1998 SE off Ishigaki 7.7 5.3 87.640 35.0 4.4 0.456 39.8
    5.3 87.640 35.0 4.4 0.456 39.8
03-09-1998 N Iwate pref. 6.2 4.3 0.201 5.4 4.3 0.201 5.4
       1.9 0.144 2.2
28-01-2000 SE off Nemuro Peninsula 7.0 4.9 232.228 59.6 4.2 0.106 5.4
       3.7 0.088 5.8
21-07-2000 Off Ibaraki pref. 6.4 4.1 3.836 1.6 4.1 3.836 1.6
       2.6 0.103 3.5
06-10-2000 W Totori pref. 7.3 5.6 47.794 23.5 4.1 0.058 8.4
    5.6 47.794 23.5 3.9 0.045 6.1
24-03-2001 Geiyo 6.7 5.2 38.216 2.2 4.0 0.337 13.6
    5.2 38.216 2.2 2.6 0.082 10.8
18-12-2001 Near Yonagunijima 7.3 5.7 236.645 14.3 4.4 0.124 11.3
    5.0 0.734 10.6 4.4 0.124 11.3
26-03-2002 Near Ishigakijima 7.0 5.3 3.100 22.7 5.3 3.100 22.7
    5.3 3.100 22.7 2.5 0.797 25.6
26-05-2003 Off Miyagi pref. 7.1 4.9 357.992 12.3 4.1 0.070 2.9
       4.1 0.070 2.9
26-07-2003 N Miyagi pref. 6.4 5.5 9.720 10.7 4.0 0.025 4.2
    5.1 3.148 5.7 4.0 0.025 4.2
26-09-2003 Off Tokachi 8.0 7.1 1.298 33.1 4.3 0.162 120.5
    5.1 0.255 29.9 4.3 0.162 120.5
05-09-2004 SE off Kii Peninsula 7.4 6.5 32.472 16.7 4.7 0.072 21.6
    5.9 5.562 22.0 4.7 0.072 21.6
23-10-2004 Chuetsu 6.8 6.5 0.635 5.8 5.3 0.060 2.5
    5.3 0.060 2.5 5.3 0.060 2.5
29-11-2004 Off Kushiro 7.1 6.9 187.716 12.2 6.0 0.074 7.6
    6.0 0.074 7.6 3.7 0.071 6.5
20-03-2005 W off Fukushima pref. 7.0 5.8 739.296 12.4 4.6 0.037 6.9
    5.4 53.031 1.5 4.6 0.037 6.9
23-07-2005 NW Chiba pref. 6.0 4.7 344.508 3.3 4.6 0.041 2.9
    4.6 0.041 2.9 4.6 0.041 2.9
16-08-2005 Off Miyagi pref. 7.2 4.7 640.702 8.2 4.6 0.094 11.6
    4.6 0.094 11.6 3.1 0.087 30.2
15-11-2005 Off Sanriku 7.2 4.8 242.824 19.9 4.5 0.091 32.1
       4.5 0.091 32.1
25-03-2007 Off Noto Peninsula 6.9 5.3 8.496 16.5 5.1 0.021 5.1
    5.1 0.021 5.1 5.1 0.021 5.1
16-07-2007 Off Chuetsu 6.8 5.8 5.405 6.6 4.6 0.048 3.5
    5.8 5.405 6.6 4.6 0.048 3.5
08-05-2008 Off Ibaraki pref. 7.0 5.8 30.597 33.3 4.6 0.094 5.3
    5.4 0.761 19.4 4.6 0.094 5.3
14-06-2008 Iwate-Miyagi 7.2 5.7 0.607 24.0 4.5 0.047 8.5
    5.7 0.607 24.0 4.5 0.047 8.5
24-07-2008 C Iwate pref. 6.8 4.8 11.026 15.8 4.8 11.026 15.8
       2.7 0.234 2.9
11-09-2008 Off Tokachi 7.1 5.7 0.199 5.8 5.7 0.199 5.8
    5.7 0.199 5.8 5.7 0.199 5.8
11-08-2009 Suruga Bay 6.5 4.5 61.066 10.1 4.0 1.102 14.1
       3.1 0.081 3.7
27-02-2010 Near Okinawa-honto 7.2 5.4 15.807 0.4 4.0 0.242 12.1
    5.1 4.288 4.1 3.1 0.151 11.1
22-12-2010 Near Chichijima 7.8 6.6 28.502 27.4 4.7 0.165 63.4
    5.4 0.364 57.2 4.7 0.165 63.4
09-03-2011 Off Tohoku 7.3 6.8 18.646 26.9 4.6 0.148 27.0
    6.2 0.199 10.30 4.6 0.148 27.0
11-03-2011 Off Tohoku 9.0 7.6 0.488 262.4 6.8 0.084 103.8
    6.8 0.084 103.8 6.8 0.084 103.8
12-03-2011 N Nagano pref. 6.7 5.9 0.544 4.7 4.1 0.073 7.3
    5.9 0.544 4.7 3.6 0.033 7.6
15-03-2011 E Shizuoka pref. 6.4 4.2 0.140 4.8 4.1 0.060 4.2
       3.2 0.035 3.0
07-04-2011 Off Miyagi pref. 7.2 5.4 43.160 10.4 4.5 0.066 19.1
    5.4 43.160 10.4 4.5 0.066 19.1
11-04-2011 Fukushima Hamadori 7.0 6.4 20.858 12.1 4.8 0.019 10.4
    5.7 0.027 7.1 4.8 0.019 10.4
07-12-2012 Off Sanriku 7.3 6.6 0.211 11.1 4.1 0.183 30.2
    6.6 0.211 11.14 3.3 0.170 32.5
13-04-2013 Near Awajishima 6.3 3.9 0.137 2.0    
       2.2 0.046 2.5
22-11-2014 N Nagano pref. 6.7 4.5 0.492 9.8 4.5 0.492 9.8
       3.4 0.034 5.0
14-11-2015 W off Satsuma Peninsula 7.1 5.9 22.480 44.6 5.2 0.431 9.8
    5.2 0.431 9.8 3.5 0.157 37.2
14-04-2016 Kumamoto 6.5 6.4 2.620 5.4 5.8 0.684 5.4
    5.8 0.684 5.4 4.1 0.027 9.2
16-04-2016 Kumamoto 7.3 5.9 0.347 17.5 5.7 0.009 79.8
    5.7 0.009 79.8 5.7 0.009 79.8
  1. The magnitudes, the delay times, and the distances from each mainshock are listed for the largest aftershock, the earliest M ≥ 5 aftershocks, the earliest M ≥ 4 aftershocks, and the first aftershocks of all magnitudes. If the magnitude of the largest aftershock is <5, no data are filled for the earliest M ≥ 5 aftershocks