Recent Japan Earthquake Activity

Based on data from the initial EEW announcement
Click on event for subsequent announcements.
Intensity Report Time (JST) Magnitude Depth Epicenter
Unknown2017-02-21 07:52:56M4.2350Off the south coast of Tokaido
42017-02-19 18:20:19M5.340Chiba-Northeastern
22017-02-19 15:03:02M4.070Off the coast of Fukushima
32017-02-17 10:18:59M4.750Near the coast of Miyakojima
12017-02-16 17:02:43M3.510Off the coast of Ibaraki
32017-02-16 14:33:20M4.010
12017-02-16 11:19:10M3.510Off the coast of Fukushima
12017-02-15 16:59:35M3.610Off the coast of Akita
22017-02-14 15:51:50M3.610Off the coast of Fukushima
22017-02-14 04:19:54M3.670Off the coast of Uraga
12017-02-12 12:43:37M4.210Off the east coast of Kanto
22017-02-11 21:04:34M3.510Off the coast of Fukushima
22017-02-11 10:03:10M3.6110Miyazaki-Southern Mountains
32017-02-11 06:40:02M4.810Off the coast of Fukushima
32017-02-11 06:06:31M5.040Off the coast of Fukushima
22017-02-11 01:10:26M4.010Off the coast of Miyagi
Unknown2017-02-10 18:11:41M3.5420
22017-02-09 14:08:13M3.530Off the coast of Ibaraki
32017-02-09 11:12:15M4.530Near the coast of Amami Oshima
22017-02-08 22:45:04M3.610
22017-02-08 21:29:56M3.610
32017-02-08 21:16:04M4.110
22017-02-08 04:02:32M3.550Near the coast of Okinawa Island
12017-02-08 03:55:20M3.510Off the coast of Fukushima
22017-02-07 22:04:23M3.460Off the east coast of Aomori
32017-02-07 20:04:46M4.310Ibaraki-North
22017-02-07 16:22:34M4.110Off the southeast coast of Kyushu
22017-02-07 06:17:21M4.230Off the coast of Fukushima
22017-02-06 15:25:32M3.920Off the coast of Ibaraki
22017-02-06 11:28:31M3.950Off the coast of Miyagi
Unknown2017-02-05 22:22:41M3.7150Off the east coast of Hachijojima
22017-02-05 09:17:58M3.520Off the coast of Iwate
12017-02-04 21:36:21M3.630Off the coast of Fukushima
22017-02-03 23:16:35M4.610Off the coast of Fukushima
22017-02-03 20:59:22M4.240Off the coast of Ibaraki
32017-02-02 20:06:38M4.340Near the coast of Okinawa Island
32017-02-02 03:12:22M4.730Near the coast of Amami Oshima
32017-02-01 03:44:14M4.530Off the coast of Miyagi
22017-01-29 05:26:30M3.660Off the coast of Miyagi
22017-01-29 03:29:09M3.820Off the coast of Iwate
Unknown2017-01-28 22:41:39M4.8160Akita Southern Inland
22017-01-28 05:02:54M3.550Tokushima-North
22017-01-28 04:06:50M3.460Off the coast of Miyagi
22017-01-27 10:34:15M3.670Near Kunashir
32017-01-26 23:35:34M3.510
12017-01-26 05:26:51M3.710Near the coast of Amami Oshima
12017-01-26 00:01:32M3.510Off the coast of Fukushima
Unknown2017-01-25 02:28:09M4.2380Off the south coast of Tokaido
22017-01-24 22:55:57M3.530Off the coast of Miyagi
12017-01-24 22:13:49M3.710Off the coast of Sanriku
More earthquake information at J1/REC Japan Earthquake Center

WARNING: DATA BASED ON EEW ANNOUNCEMENTS - FINAL INTENSITY AND MAGNITUDE WILL BE DIFFERENT THAN VALUES SHOWN! ~ [source]

About earthquake data

J1 monitors a Twitter account that receives alerts from the Japan Meteorlogical Agency's Earthquake Early Warning system. This system will then relay information about earthquakes with an intensity on the Japanese scale of 0~7.

Disclaimer of Earthquake Early Warning on J1 Radio

Data received by J1 that came from the JMA Earthquake Early Warnning (EEW) system should not be considered as an early warning due to internet related delays. It can be as long as about 5 minutes from an activation to the time it's available to J1 sources. While we make every effort to get out information, this is in no way a guaranteed service and is subject to interruption at any time. Those in Japan who hear an alert tone over J1 Radio should immediately monitor local radio or television broadcasts or their mobile phone for preliminary official EEW information. Therefore, REC Networks/J1 Radio can not be liable due to the delay or the failure to relay EEW information and J1's use of EEW data should not be used in replacement of official Japanese resources.

Detailed information about an earthquake is available usually about 5 minutes following the event from the Japanese Meteorlogical Agency: http://www.jma.go.jp/en/quake/