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
32017-03-28 19:26:18M4.010Wakayama-South
22017-03-28 17:36:06M3.320Off the coast of Fukushima
22017-03-28 07:32:53M4.910Off the southwest of Hokkaido
32017-03-27 20:22:56M3.710Ibaraki-North
Unknown2017-03-27 19:24:36M4.0370Enshu
22017-03-26 20:48:26M3.540Off the east coast of Aomori
32017-03-25 01:03:00M5.1100Near the coast of Okinawa Island
22017-03-24 01:03:00M3.540Ibaraki-South
22017-03-22 18:03:00M3.810Near the coast of Okinawa Island
Unknown2017-03-20 22:03:00M4.1480Off the south coast of Wakayama
Unknown2017-03-20 17:03:00M4.4270
12017-03-20 17:03:00M3.540Off the coast of Fukushima
12017-03-19 08:32:18M4.610Off the coast of Sanriku
22017-03-19 04:55:30M3.740Off the coast of Miyagi
32017-03-17 15:58:09M4.760Near the coast of Tanegashima
12017-03-15 15:59:01M4.610Off the coast of Sanriku
32017-03-14 12:57:47M4.690Hidaka-West
32017-03-13 15:27:09M5.110Off the coast of Sanriku
32017-03-13 13:43:52M4.010Near the coast of Tokara Islands
22017-03-13 10:12:35M3.930Off the coast of Fukushima
22017-03-13 09:49:09M3.910Off the coast of Fukushima
22017-03-13 01:48:43M4.310Off the east coast of Aomori
22017-03-12 15:19:22M3.610Off the coast of Fukushima
42017-03-12 04:58:50M5.640Off the coast of Fukushima
32017-03-12 03:49:52M5.2140Off the west coast of Satsuma Peninsula
22017-03-10 16:58:59M3.510Off the coast of Fukushima
22017-03-10 16:16:45M3.540Off the coast of Miyagi
32017-03-10 11:23:44M3.910Nemuro-North
32017-03-10 09:50:32M3.810Nemuro-North
12017-03-09 11:26:26M3.850Off the southeast coast of Chiba
22017-03-09 01:16:36M3.820Off the coast of Fukushima
22017-03-08 10:56:13M3.570Off the coast of Uraga
22017-03-08 07:11:55M4.790Near Taiwan
32017-03-08 04:53:24M5.110Off the coast of Sanriku
Unknown2017-03-07 20:48:39M3.9370Central Sea of Japan
22017-03-07 01:18:55M4.710Off the coast of Sanriku
12017-03-06 13:55:37M3.440Off the coast of Fukushima
42017-03-06 05:26:55M4.210
32017-03-05 19:06:01M4.910Off the coast of Fukushima
22017-03-05 13:19:18M4.130Off the east coast of Chiba
32017-03-05 10:19:47M4.540Chiba-Northeastern
32017-03-03 17:28:39M4.990Off the southeast coast of Nemuro Peninsula
22017-03-03 15:28:06M3.430Hyuganada
32017-03-03 00:09:04M4.230Hyuganada
42017-03-02 23:54:34M5.230Hyuganada
22017-02-28 17:10:01M4.920Off the coast of Fukushima
22017-02-28 10:51:36M5.010Off the coast of Sanriku
22017-02-28 08:51:06M3.310Miyazaki-Southern Plains
22017-02-28 02:53:53M5.010Off the coast of Sanriku
22017-02-28 01:19:43M5.160Near Taiwan
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/