J1 Earthquake Early Warning
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Quake Time Epicenter     Depth Magnitude Intensity Remarks
2011-04-01 04:34:57 Off the coast of Fukushima     10km 5.53  
2011-04-01 19:49:44 Northern inland of Akita     10km 5.55 Lower  
2011-04-01 20:57:54 Off the coast of Iwate     50km 6.34  
2011-04-01 23:44:34 Off the coast of Ibaraki     40km 5.13  
2011-04-02 04:59:49 Off the coast of Miyagi     50km 4.63  
2011-04-02 04:59:49 Off the coast of Miyagi     50km 4.83  
2011-04-02 12:48:42 Northern inland of Akita     10km 3.53  
2011-04-02 13:08:15 Off the coast of Miyagi     10km 4.43  
2011-04-02 14:08:01 Off the coast of Ibaraki     50km 4.63  
2011-04-02 14:32:50 Off the coast of Iwate     10km 5.23  
2011-04-02 16:55:57 Northern Saitama     10km 4.64  
2011-04-02 18:05:09 Northern Ibaraki     10km 4.43  
2011-04-02 19:22:54 Northern Ibaraki     10km 4.43  
2011-04-02 23:38:08 Hamado-ri, Fukushima     10km 3.83  
2011-04-03 03:54:59 Nakado-ri, Fukushima     10km 4.64  
2011-04-03 08:08:19 Nakado-ri, Fukushima     10km 4.03  
2011-04-03 10:47:21 Off the coast of Fukushima     10km 4.53  
2011-04-03 11:49:29 Southern Ibaraki     60km 4.33  
2011-04-03 12:09:07 Off the coast of Fukushima     10km 5.33  
2011-04-03 16:38:44 Off the coast of Fukushima     40km 4.93  
2011-04-03 18:35:52 Off the coast of Fukushima     60km 4.63  
2011-04-03 21:57:37 Off the coast of Fukushima     60km 5.23  
2011-04-03 23:20:46 Off the coast of Ibaraki     10km 5.13  
2011-04-03 23:53:22 Off the coast of Miyagi     50km 5.23  
2011-04-04 13:43:46 Hamado-ri, Fukushima     10km 3.53  
2011-04-04 18:29:27 Off the east coast of Chiba     10km 5.95 Upper  
2011-04-05 04:14:35 Off the coast of Miyagi     30km 5.03  
2011-04-05 04:49:56 Off the coast of Ibaraki     10km 5.03  
2011-04-05 05:43:57 Off the coast of Ibaraki     40km 4.93  
2011-04-05 06:36:54 Off the coast of Ibaraki     10km 5.03  
2011-04-05 10:29:10 Off the coast of Iwate     50km 5.13  
2011-04-05 13:25:24 Off the coast of Sanriku     30km 5.33  
2011-04-05 15:34:10 Off the coast of Fukushima     30km 4.43  
2011-04-05 18:08:49 Northern Ibaraki     10km 4.53  
2011-04-05 23:07:57 Southern Miyagi     10km 3.33  
2011-04-05 23:41:38 Off the east coast of Chiba     10km 4.84  
2011-04-06 04:43:38 Off the coast of Iwate     40km 4.93  
2011-04-06 06:24:00 Off the coast of Ibaraki     40km 4.73  
2011-04-06 07:01:55 Off the coast of Miyagi     10km 5.53  
2011-04-06 19:09:25 Northeast Chiba     10km 4.34  
2011-04-06 21:56:41 Off the coast of Ibaraki     10km 6.44  
2011-04-06 22:54:50 Off the coast of Fukushima     40km 4.83  
2011-04-07 01:25:39 Off the coast of Miyagi     60km 5.03  
2011-04-07 11:40:47 Off the coast of Ibaraki     50km 4.93  
2011-04-07 19:52:14 Northeast Chiba     40km 4.33  
2011-04-07 23:32:48 Off the coast of Miyagi     40km 7.46 Upper  
2011-04-07 23:49:37 Off the coast of Miyagi     60km 5.13  
2011-04-07 23:53:13 Off the coast of Miyagi     60km 5.13  
2011-04-08 03:43:04 Off the coast of Ibaraki     10km 4.64  
2011-04-08 05:47:12 Off the coast of Fukushima     60km 4.83  
2011-04-08 08:39:27 Off the coast of Miyagi     60km 4.83  
2011-04-08 09:28:52 Off the coast of Miyagi     80km 4.93  
2011-04-08 11:57:20 Off the coast of Ibaraki     50km 4.73  
2011-04-08 11:59:59 Off the coast of Fukushima     30km 5.43  
2011-04-08 14:03:41 Off the coast of Fukushima     10km 5.33  
2011-04-08 18:40:04 Southern Nagano     10km 4.13  
2011-04-09 00:39:40 Off the coast of Fukushima     10km 4.63  
2011-04-09 03:56:55 Southern Ibaraki     60km 4.23  
2011-04-09 06:30:10 Northern Gunma     10km 4.33  
2011-04-09 10:25:26 Off the coast of Fukushima     10km 5.33  
2011-04-09 11:59:36 Off the coast of Miyagi     50km 4.43  
2011-04-09 12:32:58 Off the coast of Ibaraki     30km 4.33  
2011-04-09 17:02:18 Southern Ibaraki     60km 4.43  
2011-04-09 17:53:30 Off the coast of Ibaraki     30km 4.73  
2011-04-09 18:01:41 Hamado-ri, Fukushima     10km 3.53  
2011-04-09 18:42:19 Off the coast of Miyagi     40km 5.13  
2011-04-09 21:47:51 Southern Saitama     40km 4.13  
2011-04-09 21:57:39     10km 6.33  
2011-04-09 21:57:39     10km 5.93  
2011-04-10 06:23:06 Northwest Chiba     70km 4.73  
2011-04-10 11:01:07 Off the coast of Fukushima     10km 6.03  
2011-04-10 13:18:01 Northeast Chiba     10km 4.64  
2011-04-10 17:52:26 Off the coast of Fukushima     10km 4.94  
2011-04-10 20:22:13 Nakado-ri, Fukushima     10km 6.01  
2011-04-10 23:02:29 Nakado-ri, Fukushima     10km 4.54  
2011-04-11 00:07:05 Off the coast of Miyagi     70km 4.73  
2011-04-11 01:34:04 Northern Ibaraki     20km 4.23  
2011-04-11 01:34:04 Northern Ibaraki     30km 4.63  
2011-04-11 02:44:54 Off the coast of Fukushima     10km 5.13  
2011-04-11 02:44:54 Off the coast of Fukushima     20km 5.03  
2011-04-11 04:23:53 Off the coast of Iwate     20km 4.73  
2011-04-11 06:35:54 Off the coast of Ibaraki     50km 5.44  
2011-04-11 10:26:04 Off the coast of Fukushima     10km 4.63  
2011-04-11 11:00:34 Northern Ibaraki     10km 3.33  
2011-04-11 13:51:41 Off the coast of Fukushima     30km 4.93  
2011-04-11 16:43:24 Off the coast of Fukushima     10km 2.61  
2011-04-11 17:16:12 Nakado-ri, Fukushima     10km 7.16 Lower  
2011-04-11 17:26:28 Nakado-ri, Fukushima     10km 4.03  
2011-04-11 17:38:36 Nakado-ri, Fukushima     10km 4.94  
2011-04-11 17:39:41 Nakado-ri, Fukushima     10km 4.54  
2011-04-11 17:45:16 Northern Ibaraki     10km 4.94  
2011-04-11 17:51:00 Nakado-ri, Fukushima     10km 4.43  
2011-04-11 17:58:02 Hamado-ri, Fukushima     10km 4.94  
2011-04-11 17:59:45 Nakado-ri, Fukushima     10km 4.94  
2011-04-11 18:03:57 Hamado-ri, Fukushima     10km 3.83  
2011-04-11 18:05:18 Nakado-ri, Fukushima     10km 5.35 Lower  
2011-04-11 18:12:31 Hamado-ri, Fukushima     10km 4.64  
2011-04-11 18:23:18 Off the coast of Fukushima     10km 4.34  
2011-04-11 18:30:37 Nakado-ri, Fukushima     10km 4.84  
2011-04-11 18:36:23 Northern Ibaraki     10km 4.74  
2011-04-11 18:44:58 Hamado-ri, Fukushima     10km 3.53  
2011-04-11 18:48:14 Nakado-ri, Fukushima     10km 4.74  
2011-04-11 18:53:47 Nakado-ri, Fukushima     10km 4.84  
2011-04-11 18:54:58 Nakado-ri, Fukushima     10km 4.43  
2011-04-11 18:57:38 Northern Gunma     10km 4.43  
2011-04-11 19:00:00 Off the coast of Fukushima     10km 5.13  
2011-04-11 19:05:05 Nakado-ri, Fukushima     10km 3.53  
2011-04-11 19:18:59 Hamado-ri, Fukushima     10km 4.74  
2011-04-11 19:25:05 Nakado-ri, Fukushima     10km 4.43  
2011-04-11 19:25:46 Hamado-ri, Fukushima     10km 4.74  
2011-04-11 19:29:10 Off the coast of Fukushima     10km 4.74  
2011-04-11 19:31:10 Nakado-ri, Fukushima     10km 4.54  
2011-04-11 19:59:08 Nakado-ri, Fukushima     20km 5.33  
2011-04-11 20:00:22 Nakado-ri, Fukushima     10km 4.54  
2011-04-11 20:07:49 Nakado-ri, Fukushima     10km 4.23  
2011-04-11 20:12:41 Hamado-ri, Fukushima     10km 3.53  
2011-04-11 20:27:29 Nakado-ri, Fukushima     10km 4.84  
2011-04-11 20:42:35 Nakado-ri, Fukushima     10km 5.44  
2011-04-11 21:13:10 Okitama, Yamagata     10km 4.94  
2011-04-11 21:47:20 Nakado-ri, Fukushima     10km 4.54  
2011-04-11 22:04:34 Hamado-ri, Fukushima     10km 3.23  
2011-04-11 22:05:39 Nakado-ri, Fukushima     10km 4.74  
2011-04-11 22:21:01 Nakado-ri, Fukushima     10km 4.44  
2011-04-11 22:59:51 Nakado-ri, Fukushima     10km 4.33  
2011-04-11 23:02:05 Hamado-ri, Fukushima     10km 4.33  
2011-04-11 23:08:48 Nakado-ri, Fukushima     10km 4.23  
2011-04-12 00:21:40 Northern Ibaraki     10km 4.23  
2011-04-12 00:43:15 Nakado-ri, Fukushima     10km 4.84  
2011-04-12 00:55:02 Nakado-ri, Fukushima     10km 4.13  
2011-04-12 01:13:15 Nakado-ri, Fukushima     10km 4.92  
2011-04-12 01:49:18 Nakado-ri, Fukushima     10km 4.44  
2011-04-12 02:21:01 Nakado-ri, Fukushima     10km 4.53  
2011-04-12 03:31:47 Off the coast of Fukushima     10km 4.73  
2011-04-12 04:43:48 Nakado-ri, Fukushima     10km 4.03  
2011-04-12 05:00:03 Nakado-ri, Fukushima     10km 4.03  
2011-04-12 05:02:48 Off the coast of Miyagi     10km 6.13  
2011-04-12 05:31:32 Hamado-ri, Fukushima     10km 3.23  
2011-04-12 05:46:40 Nakado-ri, Fukushima     10km 4.03  
2011-04-12 06:03:37 Off the coast of Miyagi     50km 4.73  
2011-04-12 06:18:20 Nakado-ri, Fukushima     10km 4.13  
2011-04-12 06:21:18 Off the coast of Miyagi     50km 4.63  
2011-04-12 07:03:17 Nakado-ri, Fukushima     10km 4.74  
2011-04-12 07:26:17 Northern Nagano     10km 5.84  
2011-04-12 07:32:50 Northern Nagano     10km 4.83  
2011-04-12 07:45:25 Off the coast of Miyagi     50km 4.73  
2011-04-12 08:02:00 Hamado-ri, Fukushima     10km 3.22  
2011-04-12 08:03:14 Nakado-ri, Fukushima     10km 4.13  
2011-04-12 08:07:57 Hamado-ri, Fukushima     10km 5.24  
2011-04-12 08:08:12 Off the east coast of Chiba     20km 6.25 Lower  
2011-04-12 08:22:34 Nakado-ri, Fukushima     10km 4.03  
2011-04-12 08:24:21 Northern Nagano     10km 4.53  
2011-04-12 08:48:14 Nakado-ri, Fukushima     10km 4.94  
2011-04-12 09:09:28 Hamado-ri, Fukushima     10km 3.63  
2011-04-12 09:21:45 Nakado-ri, Fukushima     10km 4.64  
2011-04-12 09:34:51 Nakado-ri, Fukushima     10km 4.13  
2011-04-12 09:46:43 Nakado-ri, Fukushima     10km 4.23  
2011-04-12 10:17:39 Hamado-ri, Fukushima     10km 3.93  
2011-04-12 10:23:50 Off the east coast of Chiba     10km 4.53  
2011-04-12 10:33:07 Off the coast of Fukushima     20km 4.73  
2011-04-12 11:13:49 Hamado-ri, Fukushima     10km 3.63  
2011-04-12 11:23:21 Off the coast of Miyagi     20km 6.54  
2011-04-12 12:20:33 Off the east coast of Chiba     20km 5.94  
2011-04-12 12:50:32 Nakado-ri, Fukushima     10km 4.13  
2011-04-12 13:32:56 Hamado-ri, Fukushima     10km 3.53  
2011-04-12 13:43:53 Nakado-ri, Fukushima     10km 4.13  
2011-04-12 13:58:32 Nakado-ri, Fukushima     10km 2.61  
2011-04-12 14:07:42 Nakado-ri, Fukushima     10km 6.55 Upper  
2011-04-12 14:10:43 Hamado-ri, Fukushima     10km 3.63  
2011-04-12 14:15:06 Nakado-ri, Fukushima     10km 3.72  
2011-04-12 14:26:33 Nakado-ri, Fukushima     10km 4.74  
2011-04-12 14:42:20 Nakado-ri, Fukushima     10km 4.23  
2011-04-12 14:49:33 Hamado-ri, Fukushima     10km 3.93  
2011-04-12 16:13:42 Northern Nagano     240km 6.16 Lower  
2011-04-12 16:14:59 Northern Nagano     10km 4.33  
2011-04-12 16:47:14 Off the coast of Fukushima     10km 4.64  
2011-04-12 16:49:19 Nakado-ri, Fukushima     10km 4.13  
2011-04-12 17:48:25 Nakado-ri, Fukushima     10km 5.04  
2011-04-12 18:16:43 Hamado-ri, Fukushima     10km 4.03  
2011-04-12 19:15:33 Nakado-ri, Fukushima     10km 5.54  
2011-04-12 20:00:54 Nakado-ri, Fukushima     10km 4.03  
2011-04-12 23:54:38 Northern Miyagi     20km 4.53  
2011-04-13 00:09:49 Nakado-ri, Fukushima     10km 4.43  
2011-04-13 02:13:14 Off the coast of Fukushima     10km 4.13  
2011-04-13 03:47:53 Nakado-ri, Fukushima     10km 4.53  
2011-04-13 04:02:16 Nakado-ri, Fukushima     10km 4.74  
2011-04-13 04:04:50 Off the coast of Fukushima     10km 3.23  
2011-04-13 04:34:40 Nakado-ri, Fukushima     10km 4.33  
2011-04-13 04:37:45 Off the coast of Iwate     10km 5.74  
2011-04-13 06:52:09 Off the coast of Ibaraki     40km 5.03  
2011-04-13 07:35:51 Hamado-ri, Fukushima     10km 4.33  
2011-04-13 07:54:11 Off the coast of Fukushima     10km 5.33  
2011-04-13 08:36:13 Off the east coast of Chiba     20km 5.24  
2011-04-13 08:54:14 Off the coast of Miyagi     60km 4.83  
2011-04-13 10:07:42 Hamado-ri, Fukushima     10km 7.24  
2011-04-13 10:07:42 Hamado-ri, Fukushima     10km 7.24  
2011-04-13 11:46:05 Off the coast of Iwate     10km 3.73  
2011-04-13 13:36:50 Nakado-ri, Fukushima     10km 4.33  
2011-04-13 14:52:21 Nakado-ri, Fukushima     10km 4.43  
2011-04-13 17:26:07 Off the coast of Miyagi     50km 4.73  
2011-04-13 21:00:40 Nakado-ri, Fukushima     10km 2.51  
2011-04-13 21:01:26 Off the coast of Fukushima     10km 4.83  
2011-04-13 21:58:21 Hamado-ri, Fukushima     10km 4.53  
2011-04-13 23:04:13 Nakado-ri, Fukushima     10km 4.23  
2011-04-14 04:57:18 Off the coast of Sanriku     10km 6.33  
2011-04-14 05:32:14 Off the coast of Sanriku     10km 5.93  
2011-04-14 06:42:21 Northern Miyagi     10km 5.45 Lower  
2011-04-14 07:35:49 Northern Ibaraki     10km 5.34  
2011-04-14 10:06:48 Off the coast of Miyagi     50km 4.63  
2011-04-14 11:24:09 Hamado-ri, Fukushima     10km 4.23  
2011-04-14 12:08:58 Hamado-ri, Fukushima     10km 5.35 Lower  
2011-04-14 20:02:27 Northern Ibaraki     10km 3.73  
2011-04-14 20:23:39 Off the coast of Iwate     10km 4.03  
2011-04-14 21:24:04 Nakado-ri, Fukushima     10km 5.14  
2011-04-14 23:50:17 Nakado-ri, Fukushima     10km 4.84  
2011-04-15 05:00:21 Hamado-ri, Fukushima     10km 4.54  
2011-04-15 21:53:10 Hamado-ri, Fukushima     10km 4.73  
2011-04-15 22:44:22 Off the coast of Fukushima     50km 4.63  
2011-04-15 23:34:17 Hamado-ri, Fukushima     10km 5.13  
2011-04-16 10:11:13     150km 6.24  
2011-04-16 11:19:29 Off the coast of Sanriku     10km 6.14  
2011-04-16 11:19:38 Southern Tochigi     70km 6.25 Lower  
2011-04-16 13:19:54 Off the coast of Fukushima     40km 4.93  
2011-04-16 16:29:54 Hamado-ri, Fukushima     10km 4.33  
2011-04-16 22:39:54 Near the coast of Yonagunijima     10km 4.73  
2011-04-17 00:14:18 Hamado-ri, Fukushima     10km 3.43  
2011-04-17 00:56:22 Chuetsu, Niigata     10km 4.94  
2011-04-17 05:19:16 Hamado-ri, Fukushima     10km 3.83  
2011-04-17 05:21:33 Off the coast of Ibaraki     50km 4.93  
2011-04-17 10:37:50 Off the coast of Miyagi     10km 5.03  
2011-04-17 13:38:36 Off the coast of Fukushima     30km 4.63  
2011-04-17 14:38:47 Nakado-ri, Fukushima     10km 4.33  
2011-04-17 15:49:23 Northeast Chiba     30km 4.83  
2011-04-17 17:03:45 Nakado-ri, Fukushima     10km 4.43  
2011-04-17 21:51:11 Off the coast of Sanriku     10km 4.63  
2011-04-17 23:42:25 Hamado-ri, Fukushima     10km 4.13  
2011-04-17 23:46:51 Hamado-ri, Fukushima     10km 3.63  
2011-04-18 00:47:31 Off the coast of Fukushima     10km 4.93  
2011-04-18 11:08:12 Nakado-ri, Fukushima     10km 4.53  
2011-04-18 14:34:47 Nakado-ri, Fukushima     10km 4.53  
2011-04-18 17:44:36 Hamado-ri, Fukushima     10km 3.43  
2011-04-19 00:07:55 Hamado-ri, Fukushima     10km 3.93  
2011-04-19 02:37:07 East Kanagawa     80km 4.43  
2011-04-19 03:02:31 Off the coast of Sanriku     10km 5.13  
2011-04-19 04:14:26 Off the coast of Akita     10km 5.04  
2011-04-19 06:33:42 Off the coast of Fukushima     10km 4.93  
2011-04-19 15:53:32 Nakado-ri, Fukushima     10km 5.04  
2011-04-19 21:55:31 Off the coast of Iwate     50km 4.63  
2011-04-19 23:10:24 Southern Tochigi     50km 5.14  
2011-04-19 23:47:07 Off the coast of Fukushima     10km 4.54  
2011-04-20 04:02:05 Off the east coast of Chiba     10km 4.53  
2011-04-20 04:29:14 Off the coast of Fukushima     50km 5.13  
2011-04-20 06:38:00 Off the coast of Ibaraki     30km 4.43  
2011-04-20 08:07:02     90km 5.43  
2011-04-20 09:50:49 Nakado-ri, Fukushima     10km 4.54  
2011-04-20 10:00:50 Nakado-ri, Fukushima     10km 4.43  
2011-04-20 17:30:25 Off the coast of Ibaraki     50km 4.53  
2011-04-20 18:27:19 Southern inland of Akita     10km 4.23  
2011-04-21 00:00:14 Off the coast of Fukushima     10km 4.13  
2011-04-21 00:29:45 Off the coast of Ibaraki     50km 4.43  
2011-04-21 01:33:20 Off the coast of Miyagi     50km 4.83  
2011-04-21 04:25:01 Southern inland of Akita     10km 4.03  
2011-04-21 15:05:51 Off the coast of Fukushima     10km 4.13  
2011-04-21 17:18:08 Off the coast of Miyagi     10km 5.33  
2011-04-21 22:37:06 Off the east coast of Chiba     30km 6.15 Lower  
2011-04-21 22:47:13 Northeast Chiba     30km 4.13  
2011-04-21 22:54:00 Northeast Chiba     40km 4.73  
2011-04-22 00:06:54 Northeast Chiba     40km 4.23  
2011-04-22 01:11:20 Off the coast of Fukushima     50km 6.04  
2011-04-22 01:15:16 Hamado-ri, Fukushima     10km 4.23  
2011-04-22 12:12:31 Off the coast of Sanriku     50km 4.83  
2011-04-22 15:35:22 Northwest Chiba     20km 4.53  
2011-04-23 00:25:14 Off the coast of Fukushima     10km 5.64  
2011-04-23 08:15:26 Northern Ibaraki     10km 4.44  
2011-04-23 08:37:59 Nakado-ri, Fukushima     10km 4.13  
2011-04-23 15:30:21 Off the coast of Iwate     30km 5.03  
2011-04-23 19:12:46 Off the coast of Sanriku     10km 5.73  
2011-04-23 20:07:39 Nakado-ri, Fukushima     10km 4.43  
2011-04-23 23:31:29 Northern Ibaraki     50km 4.53  
2011-04-24 05:04:54 Off the coast of Fukushima     10km 4.73  
2011-04-24 05:53:01 Nakado-ri, Fukushima     10km 4.84  
2011-04-24 12:25:10 Southern Ibaraki     40km 4.53  
2011-04-24 13:47:53 Off the coast of Miyagi     60km 4.93  
2011-04-24 14:12:56 Northern Ibaraki     10km 3.63  
2011-04-24 18:51:56 Off the coast of Miyagi     50km 4.83  
2011-04-24 19:09:51 Nakado-ri, Fukushima     10km 4.74  
2011-04-24 22:46:00 Off the coast of Fukushima     10km 4.93  
2011-04-25 02:48:23 West Oita     10km 4.23  
2011-04-25 06:06:26 Off the east coast of Kanto     10km 5.23  
2011-04-25 18:00:18 Off the coast of Ibaraki     30km 5.13  
2011-04-26 00:13:19 Hamado-ri, Fukushima     10km 4.33  
2011-04-26 06:16:22 Off the coast of Miyagi     60km 4.83  
2011-04-26 08:26:33 Off the coast of Uraga     60km 4.63  
2011-04-26 13:01:47 Off the coast of Fukushima     10km 5.24  
2011-04-26 21:12:07 Southern Ibaraki     10km 4.64  
2011-04-26 21:26:53 Off the coast of Miyagi     50km 4.73  
2011-04-27 09:55:51 Nakado-ri, Fukushima     10km 4.03  
2011-04-27 12:55:08 Nakado-ri, Fukushima     10km 4.43  
2011-04-27 16:03:27 Nakado-ri, Fukushima     10km 5.83  
2011-04-27 19:27:23 Northern Nagano     10km 4.73  
2011-04-27 21:27:47 Nakado-ri, Fukushima     10km 4.43  
2011-04-28 06:45:01 Off the coast of Miyagi     40km 5.23  
2011-04-28 10:44:47 Off the coast of Miyagi     30km 4.63  
2011-04-28 18:27:47 Off the coast of Fukushima     10km 5.33  
2011-04-29 02:17:54 Off the coast of Iwate     10km 4.83  
2011-04-29 02:34:58 Hamado-ri, Fukushima     10km 4.13  
2011-04-29 08:49:30 Off the coast of Fukushima     10km 5.24  
2011-04-29 13:38:37 Near the coast of Tanegashima     50km 4.93  
2011-04-29 15:54:48 Off the coast of Iwate     50km 4.33  
2011-04-30 02:03:25 Off the coast of Miyagi     10km 5.04  
2011-04-30 10:54:26 Off the coast of Iwate     40km 4.63  
2011-04-30 14:29:49 Off the coast of Ibaraki     30km 4.93  
2011-04-30 14:47:01 Off the coast of Fukushima     10km 5.13  
2011-04-30 15:04:22 Off the coast of Ibaraki     20km 4.83  
Archive Earthquake Data
  JMA (final quake data) EEW (preliminary reports)
2011 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec All 4 to 7 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec All 4 to 7
2012 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec All 4 to 7 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec All 4 to 7
2013 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec All 4 to 7 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec All 4 to 7
2014 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec All 4 to 7 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec All 4 to 7
2015 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec All 4 to 7 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec All 4 to 7
2016 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec All 4 to 7 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec All 4 to 7
2017 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec All 4 to 7 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec All 4 to 7