J1 Earthquake Early Warning
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Quake Time Epicenter     Depth Magnitude Intensity Remarks
2011-09-02 16:32:56 Off the coast of Ibaraki     10km 4.74  
2011-09-06 12:59:52 Northern Ibaraki     10km 4.33  
2011-09-07 02:54:51 Off the coast of Ibaraki     10km 5.23  
2011-09-07 07:27:19 Off the coast of Uraga     20km 4.63  
2011-09-07 22:29:36 Off the coast of Uraga     10km 5.24  
2011-09-08 05:48:31 Northern Ibaraki     10km 4.03  
2011-09-08 17:22:41 Southern Ibaraki     60km 4.33  
2011-09-08 19:58:02 West Kagawa     10km 3.33  
2011-09-08 22:38:05 Off the coast of Fukushima     10km 5.23  
2011-09-09 07:06:16 Off the coast of Iwate     10km 4.93  
2011-09-09 23:40:24 Off the coast of Iwate     50km 4.63  
2011-09-10 18:47:50 Central Hidaka Subprefecture     10km 4.03  
2011-09-11 19:09:29 Northwest Chiba     70km 4.73  
2011-09-12 14:15:13 Near the coast of Yonagunijima     40km 5.03  
2011-09-13 00:25:51 Off the east coast of Chiba     10km 4.73  
2011-09-13 01:49:59 West Hidaka Subprefecture     100km 4.83  
2011-09-13 02:42:41 Off the coast of Ibaraki     50km 4.73  
2011-09-13 10:34:02 Off the coast of Miyagi     50km 4.53  
2011-09-13 23:14:26 Off the coast of Miyagi     10km 4.93  
2011-09-14 07:09:17 Off the coast of Fukushima     10km 4.74  
2011-09-14 23:56:35 Off the coast of Fukushima     50km 5.03  
2011-09-15 23:25:08 Off the coast of Iwate     40km 4.53  
2011-09-16 07:15:06 Northern Wakayama     70km 5.03  
2011-09-16 07:15:06 Northern Wakayama     70km 5.03  
2011-09-16 07:15:06 Northern Wakayama     70km 5.03  
2011-09-16 07:15:06 Northern Wakayama     70km 5.03  
2011-09-16 11:03:17 Nakado-ri, Fukushima     10km 4.43  
2011-09-16 14:27:06 Off the east coast of Chiba     20km 4.73  
2011-09-17 04:26:32 Off the coast of Sanriku     10km 5.23  
2011-09-17 06:08:07 Off the coast of Iwate     10km 6.03  
2011-09-17 06:36:34 Off the coast of Sanriku     10km 5.43  
2011-09-17 07:40:45 Off the coast of Iwate     10km 5.73  
2011-09-17 16:33:55 Off the coast of Iwate     10km 5.33  
2011-09-18 12:28:35 Southern inland of Akita     10km 4.44  
2011-09-18 16:04:13 Off the coast of Sanriku     10km 5.93  
2011-09-18 19:39:46 Off the coast of Uraga     70km 4.93  
2011-09-18 22:03:27 Off the coast of Fukushima     40km 4.93  
2011-09-19 00:31:00 Nakado-ri, Fukushima     10km 4.43  
2011-09-19 03:32:22 Off the coast of Fukushima     40km 5.23  
2011-09-21 05:59:04 Off the coast of Miyagi     50km 5.33  
2011-09-21 22:30:56 Northern Ibaraki     10km 5.24  
2011-09-22 09:49:56 Off the east coast of Kanto     10km 4.23  
2011-09-22 14:46:26 Off the coast of Ibaraki     10km 4.93  
2011-09-23 04:59:18 Off the coast of Fukushima     10km 5.03  
2011-09-23 17:15:53 Off the coast of Ibaraki     10km 5.64  
2011-09-23 22:12:25 Off the coast of Iwate     50km 5.23  
2011-09-24 02:48:33 Off the coast of Ibaraki     10km 4.23  
2011-09-24 20:17:35 Off the coast of Ibaraki     10km 3.33  
2011-09-25 03:12:38 Off the coast of Fukushima     10km 5.45 Lower  
2011-09-25 06:56:24 Nakado-ri, Fukushima     10km 4.13  
2011-09-25 10:58:54 Nakado-ri, Fukushima     10km 4.74  
2011-09-25 13:18:21 Off the coast of Tokachi     60km 5.03  
2011-09-25 13:18:21 Off the coast of Tokachi     60km 5.03  
2011-09-25 13:18:21 Off the coast of Tokachi     60km 5.03  
2011-09-25 13:18:21 Off the coast of Tokachi     60km 5.03  
2011-09-26 07:30:48 Off the coast of Ibaraki     10km 4.43  
2011-09-26 16:49:09 Off the coast of Uraga     20km 4.43  
2011-09-26 16:49:09 Off the coast of Uraga     10km 5.44  
2011-09-26 17:20:14 Aizu, Fukushima     10km 3.63  
2011-09-26 22:45:56 Off the coast of Ibaraki     10km 4.24  
2011-09-27 12:56:54 Hamado-ri, Fukushima     10km 3.43  
2011-09-27 12:56:54 Hamado-ri, Fukushima     10km 3.43  
2011-09-27 12:56:54 Hamado-ri, Fukushima     10km 3.43  
2011-09-27 12:56:54 Hamado-ri, Fukushima     10km 3.43  
2011-09-29 04:18:10 Off the coast of Fukushima     30km 4.73  
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 03:26:56 Near the coast of Okinawa Island     40km 4.73  
2011-09-30 13:30:09 Nakado-ri, Fukushima     10km 4.53  
2011-09-30 13:34:53 Nakado-ri, Fukushima     10km 3.93  
2011-09-30 14:36:04 Nakado-ri, Fukushima     10km 4.54  
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