J1 Earthquake Early Warning
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Quake Time Epicenter     Depth Magnitude Intensity Remarks
2011-03-28 07:23:29 Central Sea of Japan     10km 6.84  
2011-03-31 15:19:16 Off the coast of Fukushima     10km 4.54  
2011-03-31 16:15:34 Off the coast of Miyagi     10km 4.94  
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  
2011-04-02 16:55:57 Northern Saitama     10km 4.64  
2011-04-03 03:54:59 Nakado-ri, Fukushima     10km 4.64  
2011-04-04 18:29:27 Off the east coast of Chiba     10km 5.95 Upper  
2011-04-05 23:41:38 Off the east coast of Chiba     10km 4.84  
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  
2011-04-07 23:32:48 Off the coast of Miyagi     40km 7.46 Upper  
2011-04-08 03:43:04 Off the coast of Ibaraki     10km 4.64  
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 23:02:29 Nakado-ri, Fukushima     10km 4.54  
2011-04-11 06:35:54 Off the coast of Ibaraki     50km 5.44  
2011-04-11 17:16:12 Nakado-ri, Fukushima     10km 7.16 Lower  
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 17:58:02 Hamado-ri, Fukushima     10km 4.94  
2011-04-11 17:59:45 Nakado-ri, Fukushima     10km 4.94  
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 18:48:14 Nakado-ri, Fukushima     10km 4.74  
2011-04-11 18:53:47 Nakado-ri, Fukushima     10km 4.84  
2011-04-11 19:18:59 Hamado-ri, Fukushima     10km 4.74  
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 20:00:22 Nakado-ri, Fukushima     10km 4.54  
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 22:05:39 Nakado-ri, Fukushima     10km 4.74  
2011-04-11 22:21:01 Nakado-ri, Fukushima     10km 4.44  
2011-04-12 00:43:15 Nakado-ri, Fukushima     10km 4.84  
2011-04-12 01:49:18 Nakado-ri, Fukushima     10km 4.44  
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 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 08:48:14 Nakado-ri, Fukushima     10km 4.94  
2011-04-12 09:21:45 Nakado-ri, Fukushima     10km 4.64  
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 14:07:42 Nakado-ri, Fukushima     10km 6.55 Upper  
2011-04-12 14:26:33 Nakado-ri, Fukushima     10km 4.74  
2011-04-12 16:13:42 Northern Nagano     240km 6.16 Lower  
2011-04-12 16:47:14 Off the coast of Fukushima     10km 4.64  
2011-04-12 17:48:25 Nakado-ri, Fukushima     10km 5.04  
2011-04-12 19:15:33 Nakado-ri, Fukushima     10km 5.54  
2011-04-13 04:02:16 Nakado-ri, Fukushima     10km 4.74  
2011-04-13 04:37:45 Off the coast of Iwate     10km 5.74  
2011-04-13 08:36:13 Off the east coast of Chiba     20km 5.24  
2011-04-13 10:07:42 Hamado-ri, Fukushima     10km 7.24  
2011-04-13 10:07:42 Hamado-ri, Fukushima     10km 7.24  
2011-04-14 06:42:21 Northern Miyagi     10km 5.45 Lower  
2011-04-14 07:35:49 Northern Ibaraki     10km 5.34  
2011-04-14 12:08:58 Hamado-ri, Fukushima     10km 5.35 Lower  
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  
2011-04-16 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  
2011-04-17 00:56:22 Chuetsu, Niigata     10km 4.94  
2011-04-19 04:14:26 Off the coast of Akita     10km 5.04  
2011-04-19 15:53:32 Nakado-ri, Fukushima     10km 5.04  
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 09:50:49 Nakado-ri, Fukushima     10km 4.54  
2011-04-21 22:37:06 Off the east coast of Chiba     30km 6.15 Lower  
2011-04-22 01:11:20 Off the coast of Fukushima     50km 6.04  
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  
2011-04-24 05:53:01 Nakado-ri, Fukushima     10km 4.84  
2011-04-24 19:09:51 Nakado-ri, Fukushima     10km 4.74  
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  
2011-04-29 08:49:30 Off the coast of Fukushima     10km 5.24  
2011-04-30 02:03:25 Off the coast of Miyagi     10km 5.04  
2011-05-01 09:01:53 Off the coast of Fukushima     40km 5.64  
2011-05-06 02:04:27 Hamado-ri, Fukushima     10km 5.24  
2011-05-09 22:55:03 Off the coast of Fukushima     10km 6.14  
2011-05-10 08:38:22 Northern Ibaraki     10km 4.54  
2011-05-11 02:02:14 Off the east coast of Chiba     20km 4.84  
2011-05-11 05:24:15 Off the east coast of Chiba     20km 5.14  
2011-05-14 08:35:49 Off the coast of Fukushima     10km 6.04  
2011-05-18 22:32:43 Nakado-ri, Fukushima     10km 4.54  
2011-05-20 09:46:10 Off the coast of Ibaraki     20km 5.64  
2011-05-22 07:06:31 Northeast Chiba     40km 5.64  
2011-05-23 18:46:47 Nakado-ri, Fukushima     10km 4.84  
2011-05-25 05:36:13 Hamado-ri, Fukushima     10km 5.14  
2011-05-26 19:56:33 Northern Ibaraki     10km 4.94  
2011-05-27 16:11:53 Off the coast of Akita     10km 4.64  
2011-05-27 20:51:09 Off the coast of Fukushima     10km 1.74  
2011-05-27 22:33:36 Southern inland of Akita     10km 4.84  
2011-05-28 10:57:16 Off the east coast of Chiba     10km 4.64  
2011-05-28 22:53:50 Off the east coast of Chiba     10km 5.85 Upper  
2011-05-29 05:18:34 Off the west coast of Satsuma Peninsula     10km 5.04  
2011-05-30 05:50:14 Off the coast of Fukushima     10km 4.74  
2011-05-31 21:28:29 Off the coast of Iwate     50km 5.44  
2011-06-02 11:33:47 Chuetsu, Niigata     10km 4.54  
2011-06-02 12:50:53 Chuetsu, Niigata     10km 5.04  
2011-06-02 16:01:49 Chuetsu, Niigata     10km 4.64  
2011-06-04 01:00:14 Off the coast of Fukushima     10km 6.04  
2011-06-04 01:57:30 East Shimane     10km 5.14  
2011-06-04 12:32:58 Northern inland of Akita     10km 4.54  
2011-06-05 17:18:55 Off the coast of Fukushima     10km 5.34  
2011-06-05 20:16:37 Hamado-ri, Fukushima     10km 4.54  
2011-06-09 19:38:27 Off the coast of Ibaraki     10km 5.44  
2011-06-09 19:38:27 Off the coast of Ibaraki     10km 5.84  
2011-06-10 06:03:11 Off the east coast of Chiba     10km 5.44  
2011-06-10 22:39:42 Okitama, Yamagata     10km 5.95 Lower  
2011-06-12 09:37:55 Off the east coast of Chiba     10km 4.74  
2011-06-12 09:37:55 Off the east coast of Chiba     10km 4.74  
2011-06-18 20:31:05 Off the coast of Fukushima     10km 6.04  
2011-06-21 17:49:45 Off the east coast of Chiba     10km 5.84  
2011-06-23 06:50:37 Off the coast of Sanriku     10km 7.95 Lower  
2011-06-23 19:35:02 Off the coast of Miyagi     60km 5.54  
2011-06-24 23:46:30     10km 6.56 Upper  
2011-06-25 17:25:32 Nakado-ri, Fukushima     10km 5.34  
2011-06-29 11:04:53 Nakado-ri, Fukushima     10km 4.64  
2011-06-30 08:16:37 Central Nagano     10km 5.34  
2011-06-30 08:21:33 Central Nagano     10km 5.14  
2011-07-05 19:18:43 Northern Wakayama     10km 5.35 Lower  
2011-07-05 19:34:55 Northern Wakayama     10km 4.54  
2011-07-08 03:35:41 Off the coast of Fukushima     60km 5.44  
2011-07-09 18:43:37 Nakado-ri, Fukushima     10km 4.84  
2011-07-13 05:47:09 Off the coast of Fukushima     10km 5.24  
2011-07-15 21:01:19 Southern Ibaraki     10km 5.14  
2011-07-19 03:39:49 Off the coast of Ibaraki     10km 5.64  
2011-07-20 21:58:41 Nakado-ri, Fukushima     10km 5.14  
2011-07-21 04:18:16 Near the coast of Okinawa Island     60km 5.64  
2011-07-21 18:08:00 Off the coast of Fukushima     10km 5.34  
2011-07-23 13:34:23 Off the coast of Miyagi     40km 6.55 Lower  
2011-07-25 00:07:13 Off the coast of Miyagi     40km 5.54  
2011-07-25 03:51:23 Off the coast of Fukushima     50km 6.44  
2011-07-25 10:04:17 Nakado-ri, Fukushima     10km 4.74  
2011-07-31 01:07:50 Southern Miyagi     10km 4.74  
2011-07-31 01:21:36 Off the coast of Fukushima     10km 6.34  
2011-07-31 03:53:51 Off the coast of Fukushima     50km 6.04  
2011-08-01 02:35:48 Off the east coast of Aomori     20km 5.64  
2011-08-01 22:44:47 Off the coast of Iwate     10km 6.14  
2011-08-01 23:58:11 Suruga Bay     10km 5.34  
2011-08-04 08:51:04 Off the coast of Ibaraki     40km 6.54  
2011-08-05 02:45:29 Off the east coast of Chiba     10km 4.74  
2011-08-05 20:16:02 Hamado-ri, Fukushima     10km 4.84  
2011-08-06 01:30:48 Nakado-ri, Fukushima     10km 4.74  
2011-08-07 22:33:26 Nakado-ri, Fukushima     10km 5.65 Lower  
2011-08-12 03:22:06 Off the coast of Fukushima     40km 6.45 Lower  
2011-08-14 18:55:47 Nakado-ri, Fukushima     10km 5.14  
2011-08-15 16:18:21 Off the east coast of Chiba     10km 5.74  
2011-08-17 09:23:12 East Kanagawa     30km 5.34  
2011-08-17 23:32:36 Nakado-ri, Fukushima     10km 4.74  
2011-08-19 14:36:31 Off the coast of Fukushima     30km 6.14  
2011-08-23 07:04:51 Off the coast of Fukushima     10km 5.34  
2011-08-26 11:39:05 Nakado-ri, Fukushima     10km 4.64  
2011-08-27 14:05:23 Off the coast of Ibaraki     10km 4.64  
2011-09-02 16:32:56 Off the coast of Ibaraki     10km 4.74  
2011-09-07 22:29:36 Off the coast of Uraga     10km 5.24  
2011-09-14 07:09:17 Off the coast of Fukushima     10km 4.74  
2011-09-18 12:28:35 Southern inland of Akita     10km 4.44  
2011-09-21 22:30:56 Northern Ibaraki     10km 5.24  
2011-09-23 17:15:53 Off the coast of Ibaraki     10km 5.64  
2011-09-25 03:12:38 Off the coast of Fukushima     10km 5.45 Lower  
2011-09-25 10:58:54 Nakado-ri, Fukushima     10km 4.74  
2011-09-26 16:49:09 Off the coast of Uraga     10km 5.44  
2011-09-26 22:45:56 Off the coast of Ibaraki     10km 4.24  
2011-09-29 19:05:02 Off the coast of Fukushima     10km 7.85 Upper  
2011-09-29 21:29:43 Off the coast of Fukushima     10km 4.84  
2011-09-29 22:40:58 Nakado-ri, Fukushima     10km 4.44  
2011-09-30 01:54:36 Hamado-ri, Fukushima     10km 4.64  
2011-09-30 14:36:04 Nakado-ri, Fukushima     10km 4.54  
2011-10-01 06:37:21 Nakado-ri, Fukushima     10km 4.44  
2011-10-03 07:29:50 Nakado-ri, Fukushima     10km 4.84  
2011-10-04 19:25:10 Nakado-ri, Fukushima     10km 5.65 Lower  
2011-10-04 19:25:10 Nakado-ri, Fukushima     10km 5.65 Lower  
2011-10-04 19:25:10 Nakado-ri, Fukushima     10km 5.65 Lower  
2011-10-04 19:25:10 Nakado-ri, Fukushima     10km 5.65 Lower  
2011-10-05 14:17:36 Off the coast of Iwate     10km 5.04  
2011-10-05 19:00:01 East Toyama     10km 5.44  
2011-10-05 19:12:53 Central Nagano     10km 5.14  
2011-10-05 23:33:27 Kumamoto, Kumamoto     10km 4.44  
2011-10-10 11:45:59 Off the coast of Fukushima     40km 6.04  
2011-10-21 23:17:59 Off the coast of Ibaraki     10km 4.24  
2011-10-26 02:08:52 Off the coast of Fukushima     10km 5.34  
2011-10-26 13:19:01 Off the coast of Ibaraki     10km 4.94  
2011-10-26 18:31:27 Off the coast of Ibaraki     10km 4.34  
2011-11-03 19:34:33 Southern Ibaraki     10km 4.44  
2011-11-07 23:41:59 Northern Tochigi     10km 4.84  
2011-11-08 11:59:15 East China Sea     10km 7.14  
2011-11-14 15:52:54 Off the coast of Shimane     10km 4.74  
2011-11-20 10:23:39 Northern Ibaraki     10km 5.44  
2011-11-24 19:25:28 Off the east coast of Aomori     40km 6.34  
2011-11-25 04:35:27 Northern Hiroshima     10km 5.04  
2011-12-03 05:55:28 Northeast Chiba     20km 5.65 Lower  
2011-12-11 10:22:41 Near the coast of Amami Oshima     40km 5.54  
2011-12-12 14:13:20 Northeast Chiba     20km 5.04  
2011-12-17 17:50:33 Off the coast of Notohanto     10km 4.74  
2011-12-19 16:01:41 Off the east coast of Chiba     10km 5.94  
2011-12-27 14:34:56 Off the coast of Fukushima     10km 4.74  
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