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
32017-11-21 09:26:05M4.360Off the coast of Ibaraki
22017-11-19 14:55:21M3.5120Gunma-South
22017-11-18 23:51:04M4.130Off the coast of Miyagi
22017-11-18 15:53:01M3.580Off the east coast of Aomori
32017-11-17 10:03:46M4.840Off the coast of Fukushima
32017-11-16 18:45:18M6.480Near the coast of Torishima
22017-11-16 00:36:36M3.5130
32017-11-15 14:31:26M5.810
22017-11-15 01:52:27M3.360Off the coast of Miyagi
32017-11-15 01:22:36M3.410Chiba-Northeastern
22017-11-13 07:26:07M6.110Off the coast of Sanriku
12017-11-11 08:49:34M3.610Off the coast of Ibaraki
42017-11-11 01:39:19M5.260Off the coast of Miyagi
32017-11-09 16:43:53M6.010Near the coast of Torishima
22017-11-09 03:39:48M3.510Off the coast of Iwate
22017-11-07 20:53:26M3.840Off the coast of Fukushima
32017-11-05 16:31:04M4.040Ibaraki-South
32017-11-05 06:06:47M4.2120Northern Sanpachikamikita, Aomori
22017-11-04 14:29:57M3.520Off the coast of Miyagi
Unknown2017-11-04 08:23:34M3.8360Off the west coast of Ishikawa
42017-11-03 21:38:53M4.710Ibaraki-North
12017-11-03 16:39:35M3.510Off the northeast coast of Amami Oshima
42017-11-03 12:46:11M5.260Off the coast of Tokachi
22017-11-02 09:27:25M4.540Off the coast of Fukushima
Unknown2017-11-01 09:30:13M3.510Off the coast of Shikoku
32017-11-01 00:47:06M3.310
22017-10-29 21:38:04M5.310Off the coast of Sanriku
12017-10-28 23:51:05M3.610Off the west coast of Satsuma Peninsula
32017-10-28 11:51:29M3.910Amakusanada
12017-10-28 09:19:53M4.510Off the coast of Sanriku
12017-10-24 12:29:22M3.740Off the coast of Ibaraki
22017-10-22 03:39:48M4.810
22017-10-22 01:27:05M4.740Off the coast of Fukushima
22017-10-22 00:52:20M4.810Off the east coast of Kanto
32017-10-19 21:51:27M4.530Off the coast of Fukushima
32017-10-19 18:03:38M6.310Off the northeast coast of Amami Oshima
22017-10-19 14:39:45M3.6110Tokachi-South
32017-10-19 01:50:37M4.010Off the coast of Iwate
22017-10-18 20:52:40M3.310Off the coast of Iwate
32017-10-18 08:49:58M4.560Off the coast of Uraga
22017-10-18 07:41:37M3.450Ibaraki-South
22017-10-16 19:06:59M4.230Off the coast of Iwate
22017-10-15 22:37:23M4.410Near the coast of Okinawa Island
22017-10-15 19:43:59M4.060Ibaraki-North
22017-10-15 11:21:11M3.770Off the coast of Uraga
Unknown2017-10-15 08:35:20M4.5150Near the coast of Tanegashima
12017-10-14 10:46:32M4.320Off the coast of Fukushima
12017-10-13 18:44:24M3.520Off the coast of Fukushima
Unknown2017-10-13 13:49:45M4.0380Off the southeast coast of Mie
12017-10-12 18:37:18M3.720Off the coast of Iwate
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/