J1 Earthquake Early Warning
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Quake Time Epicenter     Depth Magnitude Intensity Remarks
2011-05-01 02:11:57 Off the coast of Ibaraki     10km 5.13  
2011-05-01 08:08:13 Off the coast of Ibaraki     10km 5.03  
2011-05-01 08:24:23 Off the coast of Ibaraki     20km 4.83  
2011-05-01 09:01:53 Off the coast of Fukushima     40km 5.64  
2011-05-01 10:27:46 Off the east coast of Chiba     10km 4.43  
2011-05-01 10:45:17 Southern Saitama     80km 4.33  
2011-05-01 10:56:02 Off the coast of Fukushima     40km 4.93  
2011-05-01 11:21:51 Off the coast of Fukushima     10km 5.33  
2011-05-01 11:48:47 Off the coast of Fukushima     10km 5.13  
2011-05-01 12:26:40 Off the coast of Fukushima     60km 4.63  
2011-05-01 14:06:07 Off the coast of Fukushima     10km 4.73  
2011-05-01 16:04:19 Off the east coast of Chiba     20km 4.53  
2011-05-01 18:36:32 Off the coast of Ibaraki     20km 3.93  
2011-05-01 19:22:42 Off the coast of Ibaraki     30km 4.53  
2011-05-02 11:09:35 Off the coast of Fukushima     50km 4.93  
2011-05-02 20:29:48 Off the coast of Miyagi     50km 4.73  
2011-05-03 05:15:43 Tsugaru Strait     10km 3.23  
2011-05-03 06:25:40 Off the coast of Sanriku     10km 5.03  
2011-05-03 14:26:09     30km 4.73  
2011-05-03 20:44:06 Off the coast of Fukushima     50km 4.63  
2011-05-03 22:35:54 Off the coast of Miyagi     30km 5.23  
2011-05-03 22:57:15 Nakado-ri, Fukushima     10km 4.43  
2011-05-04 04:15:34 Southern Miyagi     10km 4.33  
2011-05-04 10:43:28 Off the coast of Fukushima     50km 4.63  
2011-05-04 14:41:46 Northern Sanpachikamikita, Aomori     90km 4.73  
2011-05-04 22:18:49 Off the coast of Miyagi     50km 4.73  
2011-05-05 19:20:47 Northern Ibaraki     10km 3.93  
2011-05-06 02:04:27 Hamado-ri, Fukushima     10km 5.24  
2011-05-06 08:21:30 Near the coast of Okinawa Island     10km 5.53  
2011-05-06 14:14:56 Off the coast of Iwate     30km 5.03  
2011-05-06 16:56:12 Off the coast of Miyagi     50km 4.63  
2011-05-06 20:52:14 Southern inland of Akita     10km 4.33  
2011-05-07 13:34:53 Aizu, Fukushima     10km 4.13  
2011-05-07 20:24:51 Off the coast of Ibaraki     20km 4.63  
2011-05-07 21:47:38 Kii Channel     40km 4.53  
2011-05-07 23:30:58 Off the coast of Ibaraki     10km 4.03  
2011-05-08 05:52:07 Off the coast of Sanriku     10km 5.63  
2011-05-08 07:11:04 Nakado-ri, Fukushima     10km 4.63  
2011-05-08 19:42:53 Off the coast of Fukushima     40km 5.13  
2011-05-09 00:20:36 Off the coast of Fukushima     10km 4.23  
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  
2011-05-10 19:14:38 Off the coast of Ibaraki     10km 5.43  
2011-05-10 23:01:53 Northern Wakayama     10km 3.53  
2011-05-11 02:02:14 Off the east coast of Chiba     20km 4.84  
2011-05-11 04:22:19 Off the coast of Ibaraki     20km 4.13  
2011-05-11 04:57:49 Off the coast of Fukushima     50km 4.83  
2011-05-11 05:24:15 Off the east coast of Chiba     20km 5.14  
2011-05-11 21:16:24 Off the coast of Ibaraki     20km 4.03  
2011-05-12 03:21:48 Off the coast of Miyagi     50km 4.83  
2011-05-13 00:26:15 Off the coast of Ibaraki     30km 4.73  
2011-05-13 01:20:58 Off the coast of Iwate     50km 5.03  
2011-05-13 05:52:10 Northwest Chiba     60km 4.63  
2011-05-13 07:36:06 Northern Ibaraki     10km 4.13  
2011-05-13 18:16:28 Central Hidaka Subprefecture     10km 4.03  
2011-05-13 22:51:12 Off the east coast of Chiba     20km 3.93  
2011-05-14 01:28:02 Northern Ibaraki     10km 4.33  
2011-05-14 04:51:46 Off the coast of Fukushima     30km 4.63  
2011-05-14 06:49:14 Off the east coast of Kanto     30km 4.93  
2011-05-14 08:35:49 Off the coast of Fukushima     10km 6.04  
2011-05-14 08:40:38 Off the coast of Fukushima     50km 4.93  
2011-05-14 09:25:08 Off the coast of Fukushima     50km 5.33  
2011-05-15 00:01:40 Off the coast of Fukushima     10km 5.13  
2011-05-15 08:50:48 Off the coast of Fukushima     40km 5.53  
2011-05-15 21:14:18 Off the coast of Fukushima     90km 5.43  
2011-05-16 04:07:41 Off the coast of Miyagi     50km 4.93  
2011-05-17 00:53:33 Off the coast of Fukushima     30km 5.13  
2011-05-17 03:05:02 East Toyama     10km 4.83  
2011-05-17 10:03:03 Off the coast of Fukushima     10km 3.43  
2011-05-17 22:41:00 Northern Ibaraki     50km 4.33  
2011-05-18 04:34:29 Hamado-ri, Fukushima     10km 3.43  
2011-05-18 16:23:55 Off the coast of Fukushima     40km 4.93  
2011-05-18 22:32:43 Nakado-ri, Fukushima     10km 4.54  
2011-05-19 17:32:47 Off the coast of Miyagi     60km 5.23  
2011-05-20 09:46:10 Off the coast of Ibaraki     20km 5.64  
2011-05-20 16:28:50 Off the coast of Fukushima     10km 5.53  
2011-05-20 17:53:04 Southern Ibaraki     60km 4.73  
2011-05-21 06:18:11 Near the coast of Miyakojima     50km 4.43  
2011-05-21 19:24:36 Off the coast of Fukushima     10km 4.93  
2011-05-22 07:06:31 Northeast Chiba     40km 5.64  
2011-05-23 06:39:53 Off the coast of Fukushima     40km 4.83  
2011-05-23 14:20:54 Off the coast of Miyagi     10km 5.23  
2011-05-23 18:46:47 Nakado-ri, Fukushima     10km 4.84  
2011-05-24 12:40:45 Off the coast of Sanriku     10km 5.83  
2011-05-24 14:43:31 Southern Tokachi Subprefecture     50km 4.63  
2011-05-24 19:18:13 Off the coast of Ibaraki     20km 4.73  
2011-05-24 20:49:20 Off the coast of Ibaraki     30km 4.93  
2011-05-25 05:36:13 Hamado-ri, Fukushima     10km 5.14  
2011-05-25 09:19:16 Southern Ibaraki     60km 4.83  
2011-05-25 17:48:03 Off the coast of Fukushima     10km 4.83  
2011-05-25 17:48:03 Off the coast of Fukushima     10km 4.83  
2011-05-25 17:48:03 Off the coast of Fukushima     10km 4.83  
2011-05-26 15:57:33 Off the coast of Iwate     50km 4.43  
2011-05-26 19:56:33 Northern Ibaraki     10km 4.94  
2011-05-26 20:12:48 Off the coast of Ibaraki     10km 4.23  
2011-05-27 16:11:53 Off the coast of Akita     10km 4.64  
2011-05-27 17:04:08 Nakado-ri, Fukushima     10km 4.53  
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  
2011-05-27 22:51:26 Near the coast of Izuoshima     20km 4.23  
2011-05-28 08:01:53 Off the coast of Iwate     50km 4.93  
2011-05-28 10:57:16 Off the east coast of Chiba     10km 4.64  
2011-05-28 11:13:59 Northern Ibaraki     50km 4.63  
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  
2011-05-29 09:03:06 Off the coast of Iwate     30km 4.63  
2011-05-30 05:50:14 Off the coast of Fukushima     10km 4.74  
2011-05-31 04:36:31 Off the coast of Ibaraki     10km 4.73  
2011-05-31 16:50:13 Off the coast of Ibaraki     30km 4.63  
2011-05-31 21:28:29 Off the coast of Iwate     50km 5.44  
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