J1 Earthquake Early Warning
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Quake Time Epicenter     Depth Magnitude Intensity Remarks
2011-07-01 20:03:41 Off the coast of Ibaraki     10km 5.63  
2011-07-02 19:33:54 Off the east coast of Chiba     20km 4.43  
2011-07-03 00:22:32 Off the east coast of Chiba     10km 5.63  
2011-07-03 00:22:32 Off the east coast of Chiba     10km 5.63  
2011-07-03 00:22:32 Off the east coast of Chiba     10km 5.63  
2011-07-04 11:07:11 Southern Wakayama     50km 4.33  
2011-07-04 19:59:57 Nakado-ri, Fukushima     10km 4.43  
2011-07-05 02:15:59 Northern Ibaraki     10km 4.03  
2011-07-05 19:18:43 Northern Wakayama     10km 5.35 Lower  
2011-07-05 19:34:55 Northern Wakayama     10km 4.54  
2011-07-06 07:05:51     10km 5.43  
2011-07-06 07:05:51     10km 5.43  
2011-07-07 00:15:02 Off the coast of Ibaraki     10km 5.83  
2011-07-08 03:35:41 Off the coast of Fukushima     60km 5.44  
2011-07-08 22:08:39 Off the coast of Miyagi     10km 4.93  
2011-07-08 22:10:47 Off the coast of Iwate     40km 4.43  
2011-07-09 18:43:37 Nakado-ri, Fukushima     10km 4.84  
2011-07-10 13:18:11 Off the coast of Ibaraki     30km 5.03  
2011-07-11 09:09:11 Hamado-ri, Fukushima     10km 4.43  
2011-07-11 13:29:27 Off the coast of Iwate     50km 5.23  
2011-07-12 17:59:58 Off the coast of Miyagi     60km 5.33  
2011-07-13 00:37:24 Off the coast of Miyagi     40km 5.53  
2011-07-13 05:47:09 Off the coast of Fukushima     10km 5.24  
2011-07-13 16:19:50 Near the coast of Ishigakijima     100km 5.33  
2011-07-14 10:34:55 Off the coast of Miyagi     50km 5.13  
2011-07-14 13:10:51 Off the coast of Fukushima     10km 5.33  
2011-07-15 01:47:12 Off the coast of Miyagi     60km 4.73  
2011-07-15 21:01:19 Southern Ibaraki     10km 5.14  
2011-07-16 14:17:40 Off the coast of Fukushima     50km 4.83  
2011-07-17 09:55:44 Nakado-ri, Fukushima     10km 4.43  
2011-07-19 03:39:49 Off the coast of Ibaraki     10km 5.64  
2011-07-19 05:22:41 Off the south coast of Suruga Bay     10km 4.43  
2011-07-19 10:38:49 Off the coast of Fukushima     10km 5.33  
2011-07-20 12:29:34 Off the coast of Fukushima     10km 5.53  
2011-07-20 12:29:34 Off the coast of Fukushima     10km 5.53  
2011-07-20 12:29:34 Off the coast of Fukushima     10km 5.53  
2011-07-20 12:29:34 Off the coast of Fukushima     10km 5.53  
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  
2011-07-22 07:48:26 Off the east coast of Chiba     30km 4.63  
2011-07-22 11:01:34 Off the east coast of Chiba     10km 3.43  
2011-07-22 11:01:34 Off the east coast of Chiba     10km 3.43  
2011-07-22 11:01:34 Off the east coast of Chiba     10km 3.43  
2011-07-22 14:58:26 Off the coast of Miyagi     30km 4.73  
2011-07-23 13:34:23 Off the coast of Miyagi     40km 6.55 Lower  
2011-07-23 23:22:27 Southern Ibaraki     50km 4.43  
2011-07-24 08:56:15 Off the coast of Miyagi     60km 4.63  
2011-07-24 23:32:17 Southern Mie     50km 4.93  
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  
2011-07-25 20:04:46 Off the coast of Miyagi     40km 5.23  
2011-07-25 20:54:34 Off the east coast of Kanto     10km 6.13  
2011-07-26 05:39:55 Off the coast of Miyagi     50km 5.13  
2011-07-26 05:39:55 Off the coast of Miyagi     50km 4.63  
2011-07-26 07:58:53 Central Hidaka Subprefecture     60km 4.93  
2011-07-26 22:36:03 Off the coast of Miyagi     60km 4.63  
2011-07-28 05:23:02 Off the east coast of Chiba     10km 3.63  
2011-07-28 05:23:02 Off the east coast of Chiba     10km 3.63  
2011-07-28 05:23:02 Off the east coast of Chiba     10km 3.63  
2011-07-29 07:11:49 Off the east coast of Chiba     10km 4.43  
2011-07-29 10:59:11 Off the coast of Ibaraki     10km 4.63  
2011-07-29 17:08:54 Southern Miyagi     10km 4.53  
2011-07-29 17:08:54 Southern Miyagi     10km 4.53  
2011-07-29 17:08:54 Southern Miyagi     10km 4.53  
2011-07-29 17:08:54 Southern Miyagi     10km 4.53  
2011-07-29 23:53:21 Off the coast of Fukushima     20km 5.43  
2011-07-30 08:44:11 Off the coast of Miyagi     50km 4.43  
2011-07-30 08:44:11 Off the coast of Miyagi     50km 4.43  
2011-07-30 08:44:11 Off the coast of Miyagi     50km 4.43  
2011-07-30 08:44:11 Off the coast of Miyagi     50km 4.43  
2011-07-30 14:42:33 Shonai, Yamagata     10km 4.33  
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  
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
2018 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
2019 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
2020 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
2021 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
2022 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
2023 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
2024 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

Information provided by the Japan Meteorological Agency.
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