Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of Mwp 6.0 on date 09-12-2021 and time 02:05:11 (UTC) in region Ryukyu Islands, Japan [Sea: Japan]

A magnitude Mwp 6.0 earthquake occured in region: Ryukyu Islands, Japan [Sea: Japan], on

  • 09-12-2021 02:05:11 (UTC)
  • 09-12-2021 03:05:11 (UTC +01:00) Italian time
  • 09-12-2021 10:05:11 (UTC +08:00) local time in the region of the earthquake (Asia/Shanghai)

and geographic coordinates (lat, lon) 29.2680, 129.4990 at 35 km depth.

The earthquake was located by: Sala Sismica INGV-Roma.

Search earthquakes: Any within 30 km radius

The values of hypocentral coordinates and magnitude may be revised at a later time as more information becomes available.

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Municipalities within 20 km from the epicenter

No Italian municipalities within 20 km distance.

Municipalities with at least 50000 inhabitants

No Italian municipalities within 100 km from the epicenter with at least 50000 inhabitants.

Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100 		mb 5.3
Mwp 6.0
Mwpd 6.2 		2021-12-09
02:05:11		 29.2676 129.499 35 2021-12-09
02:19:08		 Sala Sismica INGV-Roma 98331161
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-12-09 02:05:11
Latitude 29.2676
Longitude 129.4990
Depth (km) 35 (from location)
Evaluation mode of Origin automatic
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV-A
Event type earthquake
Origin ID 98331161

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 7484
Semi-minor axis of confidence ellipse (meter) 4110
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 305
Circular confidence region, given by single value of horizontal uncertainty (meter) 6222.4
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 84.2875
Number of associated phases, regardless of their use for origin computation 53
Number of defining phases 53
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 1.59181
Epicentral distance of station closest to the epicenter (degree) 2.38783
Epicentral distance of station farthest from the epicenter (degree) 63.26881
Number of stations at which the event was observed 46
Number of stations from which data was used for origin computation 46
Magnitudes information

Mwp:6.0

Field Value
Value 6.0
Uncertainty 0.1
Num. used stations 26
Type of magnitude Mwp
Reference to an origin 98331161
Agency INGV
Autore early-est_ee1.1.9
Time of creation (UTC) 2021-12-09 02:19:08

Mwpd:6.2

Field Value
Value 6.2
Uncertainty 0.1
Num. used stations 20
Type of magnitude Mwpd
Reference to an origin 98331161
Agency INGV
Autore early-est_ee1.1.9
Time of creation (UTC) 2021-12-09 02:19:08

mb:5.3

Field Value
Value 5.3
Uncertainty 0.1
Num. used stations 33
Type of magnitude mb
Reference to an origin 98331161
Agency INGV
Autore early-est_ee1.1.9
Time of creation (UTC) 2021-12-09 02:19:08
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IU.NWAO.BHZ.00 2021-12-09T02:15:34.82 10.0 positive automatic P 192 7022.8368 -1.06451 0.36587
IU.COLA.BHZ.00 2021-12-09T02:15:18.77 10.0 negative automatic P 29 6732.3054 0.493527 0.371113
ND.KOUNC.BHZ.00 2021-12-09T02:15:15.00 10.0 negative automatic P 142 6665.3835 0.863554 0.391949
II.KDAK.BHZ.00 2021-12-09T02:15:09.42 10.0 positive automatic P 37 6578.8923 0.636305 0.416864
AU.EIDS.BHZ. 2021-12-09T02:15:01.92 10.0 negative automatic P 157 6485.7855 -1.05007 0.409681
AU.QLP.BHZ. 2021-12-09T02:14:55.57 10.0 negative automatic P 164 6394.4103 -1.63129 0.403065
G.SANVU.BHZ.00 2021-12-09T02:14:58.20 10.0 positive automatic P 136 6399.3054 0.71485 0.456462
II.ARTI.BHZ.00 2021-12-09T02:14:42.97 10.0 positive automatic P 321 6182.9442 -0.7198 0
AU.WRKA.BHZ.00 2021-12-09T02:14:32.18 10.0 negative automatic P 181 6028.965 -1.54875 0.479533
IU.CTAO.BHZ.00 2021-12-09T02:14:15.72 10.0 negative automatic P 160 5764.3632 -0.40704 0.488333
IU.MBWA.BHZ.00 2021-12-09T02:14:09.85 10.0 negative automatic P 192 5693.7894 -1.5067 0.532582
II.SIMI.BHZ.00 2021-12-09T02:14:02.62 10.0 negative automatic P 298 5565.3846 0.0210445 0.54502
II.WRAB.BHZ.00 2021-12-09T02:13:55.75 10.0 positive automatic P 174 5485.8309 -1.46832 0.590623
II.AAK.BHZ.00 2021-12-09T02:13:27.92 10.0 negative automatic P 303 5065.5072 -0.101044 0.627544
II.KURK.BHZ.00 2021-12-09T02:13:08.77 10.0 negative automatic P 314 4814.0256 -0.911857 0.660059
AU.MTN.BHZ.00 2021-12-09T02:12:57.93 10.0 negative automatic P 178 4677.4068 -1.7707 0.690091
AU.KDU.BHZ.00 2021-12-09T02:12:57.05 10.0 negative automatic P 176 4667.6277 -1.91189 0.683755
GE.GSI.BHZ. 2021-12-09T02:12:51.97 10.0 positive automatic P 233 4583.3454 -0.785979 0.659675
IU.MAKZ.BHZ.00 2021-12-09T02:12:46.27 10.0 negative automatic P 309 4502.7927 -0.599367 0.727664
GE.JAGI.BHZ. 2021-12-09T02:12:44.97 10.0 negative automatic P 204 4498.7523 -1.5234 0.340164
GE.SOEI.BHZ. 2021-12-09T02:12:33.77 10.0 negative automatic P 188 4367.406 -3.04901 0.679024
MY.KOM.BHZ. 2021-12-09T02:12:15.72 10.0 negative automatic P 226 4078.8837 0.980664 0.77437
MY.IPM.BHZ. 2021-12-09T02:12:13.72 10.0 negative automatic P 233 4064.0208 0.0841168 0.813936
MY.KUM.BHZ. 2021-12-09T02:12:11.62 10.0 positive automatic P 234 4029.4332 0.672682 0.782936
GE.FAKI.BHZ. 2021-12-09T02:11:35.92 10.0 negative automatic P 175 3584.5452 -0.336092 0.882187
MY.SBM.BHZ. 2021-12-09T02:11:28.97 10.0 negative automatic P 215 3490.617 0.133273 0.899796
GE.SANI.BHZ. 2021-12-09T02:11:27.37 10.0 negative automatic P 187 3496.0227 -1.85958 0.898778
II.TLY.BHZ.00 2021-12-09T02:11:11.62 10.0 negative automatic P 327 3274.8774 -0.111495 0.909091
MY.LDM.BHZ. 2021-12-09T02:10:44.07 10.0 negative automatic P 205 2912.6289 1.57591 0.851064
IU.ULN.BHZ.00 2021-12-09T02:10:34.62 10.0 negative automatic P 323 2817.6351 -0.373189 0.930233
RM.SLV.BHZ. 2021-12-09T02:10:26.92 10.0 negative automatic P 257 2708.289 1.06071 0.43956
IU.GUMO.BHZ.00 2021-12-09T02:09:55.45 10.0 negative automatic P 135 2350.536 2.40753 0
IU.YSS.BHZ.00 2021-12-09T02:09:45.05 10.0 positive automatic P 27 2272.5141 -0.39059 0.769231
II.ERM.BHZ.00 2021-12-09T02:09:03.82 10.0 negative automatic P 37 1871.2158 -0.178965 0.909091
JP.JTM.BHZ. 2021-12-09T02:08:39.70 10.0 positive automatic P 36 1652.3016 1.03398 0.888889
IU.MAJO.BHZ.00 2021-12-09T02:07:36.97 10.0 positive automatic P 43 1143.7995 0.741543 0.909091
JP.JSG.BHZ. 2021-12-09T02:07:24.00 10.0 positive automatic P 51 1013.7741 3.87186 0.930233
JP.JGF.BHZ. 2021-12-09T02:07:21.05 10.0 positive automatic P 44 1017.204 0.417888 0.952381
G.INU.BHZ.00 2021-12-09T02:07:15.96 10.0 negative automatic P 44 976.5114 0.429545 0.615385
IU.TATO.BHZ.00 2021-12-09T02:07:12.47 10.0 negative automatic P 241 922.6764 3.58274 0.851064
JP.YOJ.BHZ. 2021-12-09T02:07:00.05 10.0 positive automatic P 232 834.2649 2.10735 0.909091
JP.JMN.BHZ. 2021-12-09T02:06:34.45 10.0 positive automatic P 39 645.687 -0.256681 0.952381
JP.JTU.BHZ. 2021-12-09T02:06:24.90 10.0 positive automatic P 359 583.9044 -2.08303 0.43956
JP.JMZ.BHZ. 2021-12-09T02:06:07.75 10.0 positive automatic P 156 418.6254 1.23265 0.615385
JP.JOW.BHZ. 2021-12-09T02:05:51.00 10.0 positive automatic P 204 295.4154 -0.290038 0.952381
JP.JSU.BHZ. 2021-12-09T02:05:45.55 10.0 positive automatic P 20 265.0458 -2.00704 0.952381
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download