J1 Earthquake Early Warning
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Quake Time Epicenter     Depth Magnitude Intensity Remarks
2020-04-01 04:47:48 Near the coast of Ishigakijima     10 43  
2020-04-01 04:49:49 Off the coast of Sanriku     10 3.51  
2020-04-01 18:11:45 Near the coast of Ishigakijima     10 43  
2020-04-02 00:33:27 Off the east coast of Chiba     20 4.53  
2020-04-02 18:13:17 Off the coast of Sanriku     10 4.42  
2020-04-04 12:55:30 Near the coast of Amami Oshima     70 4.53  
2020-04-05 06:57:04 Off the west coast of Satsuma Peninsula     10 43  
2020-04-06 16:41:41 Off the coast of Iwate     50 3.52  
2020-04-07 14:12:01 Hyuganada     30 4.73  
2020-04-07 19:11:27 Central Sea of Japan     310 3.7Unkn 
2020-04-08 02:53:38 Off the west coast of Satsuma Peninsula     10 4.83  
2020-04-08 09:07:31 Near Taiwan     90 4.42  
2020-04-08 14:55:50 Off the coast of Okinawa Main Island     110 4.32  
2020-04-08 23:48:31 Off the south coast of Tokaido     10 3.91  
2020-04-09 12:12:31 Off the coast of Ibaraki     50 3.52  
2020-04-10 00:45:53 Off the coast of Ibaraki     60 4.33  
2020-04-10 08:20:09 Off the coast of Hachijojima     30 4.42  
2020-04-10 19:22:57 Off the coast of Uraga     70 4.43  
2020-04-10 21:40:51 Off the coast of Fukushima     10 3.61  
2020-04-12 11:01:33 Off the northwest coast of Hokkaido     260 3.5Unkn 
2020-04-12 20:36:30 Near Taiwan     70 4.92  
2020-04-12 22:11:50 Off the coast of Uraga     40 3.92  
2020-04-15 16:19:05 Near the coast of Okinawa     20 4.93  
2020-04-15 16:28:10 Near the coast of Okinawa     20 4.33  
2020-04-16 11:18:01 Off the coast of Fukushima     40 4.53  
2020-04-16 17:01:29 Off the coast of Fukushima     40 3.51  
2020-04-17 06:22:29 Near the coast of Okinawa     30 5.13  
2020-04-17 14:36:46 Off the northwest coast of Hokkaido     280 3.9Unkn 
2020-04-18 14:07:27 Near the coast of Okinawa     20 4.23  
2020-04-20 10:49:36 Off the coast of Miyagi     30 3.92  
2020-04-20 18:02:14 Off the east coast of Aomori     10 3.62  
2020-04-20 18:42:41 Off the coast of Sanriku     10 3.61  
2020-04-20 20:38:50 Off the west coast of Satsuma Peninsula     170 4.7Unkn 
2020-04-21 23:34:26 Off the coast of Miyagi     40 3.31  
2020-04-22 20:26:37 Off the coast of Miyagi     40 4.53  
2020-04-23 02:21:09 Near the coast of Okinawa     10 4.72  
2020-04-23 03:37:33 Near the coast of Torishima     500 4.3Unkn 
2020-04-23 10:22:19 Off the coast of Fukushima     60 3.52  
2020-04-23 23:00:56 Off the coast of Kushiro     100 3.52  
2020-04-24 04:52:27 Off the east coast of Aomori     50 4.93  
2020-04-24 06:19:48 Near the coast of Amami Oshima     20 4.13  
2020-04-26 00:03:02 Off the coast of Kushiro     50 3.21  
2020-04-26 02:12:09 Off the southeast coast of Nemuro Peninsula     50 3.31  
2020-04-26 02:20:37 Off the coast of Okinawa Main Island     10 4.62  
2020-04-26 03:28:36 Off the coast of Okinawa Main Island     20 4.72  
2020-04-26 23:02:17 Off the coast of Kushiro     50 4.72  
2020-04-27 18:06:49 Off the southeast coast of Nemuro Peninsula     10 3.81  
2020-04-27 22:23:56 Off the coast of Ibaraki     10 4.32  
2020-04-28 19:30:58 Off the coast of Fukushima     10 3.72  
2020-04-28 22:15:31 Off the coast of Uraga     60 4.32  
2020-04-29 13:44:52 Off the coast of Northwest Fukuoka     10 42  
2020-04-30 12:15:21 Off the east coast of Aomori     50 5.13  
2020-04-30 19:51:35 Near the coast of Amami Oshima     20 3.73  
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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