J1 Earthquake Early Warning
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Quake Time Epicenter     Depth Magnitude Intensity Remarks
2011-08-01 00:27:34 Off the coast of Fukushima     50km 4.73  
2011-08-01 02:35:48 Off the east coast of Aomori     20km 5.64  
2011-08-01 15:54:58 Off the coast of Miyagi     20km 4.73  
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  
2011-08-02 00:23:14 Off the coast of Ibaraki     10km 4.73  
2011-08-02 00:23:14 Off the coast of Ibaraki     10km 4.73  
2011-08-02 00:23:14 Off the coast of Ibaraki     10km 4.73  
2011-08-02 12:37:44 Northwest Chiba     70km 4.23  
2011-08-02 12:37:44 Northwest Chiba     60km 4.43  
2011-08-03 04:26:03 Northwest Chiba     60km 4.33  
2011-08-03 08:33:40 Off the east coast of Chiba     10km 4.73  
2011-08-03 08:33:40 Off the east coast of Chiba     10km 4.73  
2011-08-03 08:33:40 Off the east coast of Chiba     10km 4.73  
2011-08-04 08:51:04 Off the coast of Ibaraki     40km 6.54  
2011-08-04 08:51:04 Off the coast of Ibaraki     40km 5.73  
2011-08-05 02:45:29 Off the east coast of Chiba     10km 4.74  
2011-08-05 06:51:41     60km 4.43  
2011-08-05 19:53:19 Off the coast of Iwate     20km 4.93  
2011-08-05 20:16:02 Hamado-ri, Fukushima     10km 4.84  
2011-08-06 01:30:48 Nakado-ri, Fukushima     10km 4.74  
2011-08-06 16:14:53 Off the east coast of Chiba     10km 5.43  
2011-08-06 23:45:28 Off the coast of Fukushima     60km 4.83  
2011-08-07 04:15:10 Nakado-ri, Fukushima     10km 4.43  
2011-08-07 04:15:10 Nakado-ri, Fukushima     10km 4.43  
2011-08-07 04:15:10 Nakado-ri, Fukushima     10km 4.43  
2011-08-07 04:15:10 Nakado-ri, Fukushima     10km 4.43  
2011-08-07 22:33:26 Nakado-ri, Fukushima     10km 5.65 Lower  
2011-08-08 16:19:55 Off the coast of Fukushima     50km 4.53  
2011-08-10 02:44:53 Off the coast of Miyagi     50km 4.43  
2011-08-10 08:13:20 Northern Wakayama     70km 5.03  
2011-08-10 13:29:45 Off the coast of Iwate     10km 4.73  
2011-08-11 17:44:24 Nakado-ri, Fukushima     10km 4.23  
2011-08-11 22:31:27 Off the coast of Miyagi     10km 5.33  
2011-08-12 03:22:06 Off the coast of Fukushima     40km 6.45 Lower  
2011-08-12 04:37:46 Enshunada     20km 5.03  
2011-08-12 07:26:56 Off the northwest of Hokkaido     20km 4.43  
2011-08-12 21:04:05 Suruga Bay     10km 4.33  
2011-08-13 23:00:53 Off the coast of Fukushima     30km 4.53  
2011-08-14 16:38:30 Northern Ibaraki     10km 4.23  
2011-08-14 18:55:47 Nakado-ri, Fukushima     10km 5.14  
2011-08-15 15:26:48 Southern Ibaraki     70km 4.73  
2011-08-15 16:18:21 Off the east coast of Chiba     10km 5.74  
2011-08-16 19:15:55 Off the coast of Ibaraki     50km 5.73  
2011-08-17 09:23:12 East Kanagawa     30km 5.34  
2011-08-17 12:05:02 Off the coast of Miyagi     20km 5.63  
2011-08-17 12:14:24 Off the coast of Miyagi     10km 5.13  
2011-08-17 16:55:23     10km 5.73  
2011-08-17 23:32:36 Nakado-ri, Fukushima     10km 4.74  
2011-08-18 01:32:42 Southern Ibaraki     80km 4.43  
2011-08-18 03:25:40 Central Nagano     10km 4.03  
2011-08-18 09:11:20 Nakado-ri, Fukushima     10km 4.43  
2011-08-18 15:19:36 Northern Ibaraki     10km 3.53  
2011-08-19 00:39:48 Southern Ibaraki     60km 4.53  
2011-08-19 01:55:58 Nakado-ri, Fukushima     10km 4.23  
2011-08-19 11:28:51 Off the southeast coast of Nemuro Peninsula     90km 4.83  
2011-08-19 13:50:59 Off the coast of Iwate     60km 4.93  
2011-08-19 14:36:31 Off the coast of Fukushima     30km 6.14  
2011-08-20 23:12:06 Off the coast of Ibaraki     50km 5.03  
2011-08-21 04:37:23 Off the coast of Miyagi     10km 5.03  
2011-08-21 07:33:06 Nakado-ri, Fukushima     10km 4.13  
2011-08-21 07:58:40 Off the coast of Miyagi     50km 4.73  
2011-08-22 06:39:50 Northern Ibaraki     10km 3.73  
2011-08-22 07:05:40 Off the coast of Fukushima     40km 5.33  
2011-08-22 09:07:08 Central Tokachi Subprefecture     10km 4.33  
2011-08-22 20:23:12 Off the coast of Ibaraki     10km 5.23  
2011-08-22 21:21:25 Off the coast of Fukushima     10km 4.33  
2011-08-22 22:19:17 Nakado-ri, Fukushima     10km 4.03  
2011-08-23 00:26:10 Off the coast of Fukushima     40km 4.73  
2011-08-23 07:04:51 Off the coast of Fukushima     10km 5.34  
2011-08-23 15:04:57 Off the coast of Uraga     60km 5.03  
2011-08-24 05:04:43 Off the coast of Fukushima     40km 5.03  
2011-08-25 13:07:52 Off the coast of Iwate     10km 4.43  
2011-08-26 08:34:09 Off the coast of Miyagi     50km 4.43  
2011-08-26 11:39:05 Nakado-ri, Fukushima     10km 4.64  
2011-08-27 11:35:22 Hamado-ri, Fukushima     10km 3.43  
2011-08-27 13:50:17 Near the coast of Miyakojima     30km 4.33  
2011-08-27 14:05:23 Off the coast of Ibaraki     10km 4.64  
2011-08-27 23:33:58 Off the coast of Fukushima     10km 4.73  
2011-08-28 01:14:29 Near the coast of Amami Oshima     30k 4.53  
2011-08-28 01:14:29 Near the coast of Amami Oshima     30km 4.53  
2011-08-28 01:14:29 Near the coast of Amami Oshima     30km 4.53  
2011-08-28 01:14:29 Near the coast of Amami Oshima     30km 4.53  
2011-08-28 04:49:10 Near the coast of Amami Oshima     30km 4.63  
2011-08-30 03:21:50 Off the coast of Ibaraki     10km 4.63  
2011-08-31 02:20:42 Off the east coast of Chiba     20km 3.83  
2011-08-31 18:32:51 Northwest Chiba     60km 5.03  
2011-08-31 21:42:54 Northeast Chiba     10km 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