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) 29.268, 129.499 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.

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

These three maps show the results of the analysis using the software ShakeMap designed to provide the level of ground shaking experienced in a region using the data recorded by seismometers and strong motion instruments and seismological information regarding the attenuation of the wavefield with distance and the site characteristics. The Shakemaps are determined for research purposes to provide fast estimates of the level of ground shaking produced by the earthquake. The maps are calculated automatically and updated as more data become available. See http://shakemap.ingv.it for additional information. The black star indicates the epicenter. The triangles show the accelerometric and velocimetric stations used in the calculation, colored according to the recorded shaking.

Intensity Shakemap

Intensity Shakemap

This map shows the distribution of instrumental intensities. The intensity is derived through an empirical law that correlates the recorded values of actual ground shaking, e.g., acceleration and velocity, with the macroseismic intensity for Italian earthquakes, as reported in the Italian Macroseismic Database (DBMI15, https://doi.org/10.13127/cpti/cpti15.3).
Peak ground acceleration Shakemap

Peak ground acceleration Shakemap

This map shows the distribution of peak ground acceleration expressed as percent of the acceleration of gravity (i.e., g = 9.81 m/s²).
Peak velocity Shakemap

Peak velocity Shakemap

This map shows the distribution of peak ground velocities expressed in cm/s.
Felt maps
Preliminary map of the earthquake effects from the web questionnaire

Preliminary map of the earthquake effects from the web questionnaire

This map shows the distribution of earthquake resentment in the area, expressed in terms of intensity on the MCS scale (Mercalli-Cancani-Sieberg). Intensities are determined using data from questionnaires collected on the website http://www.hsit.it. The intensities shown are determined considering all the reports received from each municipality, and are all the more reliable the greater the number of questionnaires. The collected data are subjected to an automatic statistical filter, but are not checked individually. In particular, intensities greater than or equal to the VI degree of the MCS or EMS scale require on-site verification by specialized personnel. The black star is the epicenter of the earthquake that occurred. This map is updated every time citizens fill out new questionnaires. The number of questionnaires processed to obtain this map, the date and time of the last update are shown at the top right.
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

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

Mwp:6

Field Value
Value 6
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

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 Takeoff_angle Residual Weight
IU.NWAO.BHZ.00 2021-12-09T02:15:34.82 10.0 positive automatic P 192 63.2688 -1.06451 0.36587
IU.COLA.BHZ.00 2021-12-09T02:15:18.77 10.0 negative automatic P 29 60.6514 0.493527 0.371113
ND.KOUNC.BHZ.00 2021-12-09T02:15:15.00 10.0 negative automatic P 142 60.0485 0.863554 0.391949
II.KDAK.BHZ.00 2021-12-09T02:15:09.42 10.0 positive automatic P 37 59.2693 0.636305 0.416864
AU.EIDS.BHZ. 2021-12-09T02:15:01.92 10.0 negative automatic P 157 58.4305 -1.05007 0.409681
AU.QLP.BHZ. 2021-12-09T02:14:55.57 10.0 negative automatic P 164 57.6073 -1.63129 0.403065
G.SANVU.BHZ.00 2021-12-09T02:14:58.20 10.0 positive automatic P 136 57.6514 0.71485 0.456462
II.ARTI.BHZ.00 2021-12-09T02:14:42.97 10.0 positive automatic P 321 55.7022 -0.7198 0
AU.WRKA.BHZ.00 2021-12-09T02:14:32.18 10.0 negative automatic P 181 54.315 -1.54875 0.479533
IU.CTAO.BHZ.00 2021-12-09T02:14:15.72 10.0 negative automatic P 160 51.9312 -0.40704 0.488333
IU.MBWA.BHZ.00 2021-12-09T02:14:09.85 10.0 negative automatic P 192 51.2954 -1.5067 0.532582
II.SIMI.BHZ.00 2021-12-09T02:14:02.62 10.0 negative automatic P 298 50.1386 0.0210445 0.54502
II.WRAB.BHZ.00 2021-12-09T02:13:55.75 10.0 positive automatic P 174 49.4219 -1.46832 0.590623
II.AAK.BHZ.00 2021-12-09T02:13:27.92 10.0 negative automatic P 303 45.6352 -0.101044 0.627544
II.KURK.BHZ.00 2021-12-09T02:13:08.77 10.0 negative automatic P 314 43.3696 -0.911857 0.660059
AU.MTN.BHZ.00 2021-12-09T02:12:57.93 10.0 negative automatic P 178 42.1388 -1.7707 0.690091
AU.KDU.BHZ.00 2021-12-09T02:12:57.05 10.0 negative automatic P 176 42.0507 -1.91189 0.683755
GE.GSI.BHZ. 2021-12-09T02:12:51.97 10.0 positive automatic P 233 41.2914 -0.785979 0.659675
IU.MAKZ.BHZ.00 2021-12-09T02:12:46.27 10.0 negative automatic P 309 40.5657 -0.599367 0.727664
GE.JAGI.BHZ. 2021-12-09T02:12:44.97 10.0 negative automatic P 204 40.5293 -1.5234 0.340164
GE.SOEI.BHZ. 2021-12-09T02:12:33.77 10.0 negative automatic P 188 39.346 -3.04901 0.679024
MY.KOM.BHZ. 2021-12-09T02:12:15.72 10.0 negative automatic P 226 36.7467 0.980664 0.77437
MY.IPM.BHZ. 2021-12-09T02:12:13.72 10.0 negative automatic P 233 36.6128 0.0841168 0.813936
MY.KUM.BHZ. 2021-12-09T02:12:11.62 10.0 positive automatic P 234 36.3012 0.672682 0.782936
GE.FAKI.BHZ. 2021-12-09T02:11:35.92 10.0 negative automatic P 175 32.2932 -0.336092 0.882187
MY.SBM.BHZ. 2021-12-09T02:11:28.97 10.0 negative automatic P 215 31.447 0.133273 0.899796
GE.SANI.BHZ. 2021-12-09T02:11:27.37 10.0 negative automatic P 187 31.4957 -1.85958 0.898778
II.TLY.BHZ.00 2021-12-09T02:11:11.62 10.0 negative automatic P 327 29.5034 -0.111495 0.909091
MY.LDM.BHZ. 2021-12-09T02:10:44.07 10.0 negative automatic P 205 26.2399 1.57591 0.851064
IU.ULN.BHZ.00 2021-12-09T02:10:34.62 10.0 negative automatic P 323 25.3841 -0.373189 0.930233
RM.SLV.BHZ. 2021-12-09T02:10:26.92 10.0 negative automatic P 257 24.399 1.06071 0.43956
IU.GUMO.BHZ.00 2021-12-09T02:09:55.45 10.0 negative automatic P 135 21.176 2.40753 0
IU.YSS.BHZ.00 2021-12-09T02:09:45.05 10.0 positive automatic P 27 20.4731 -0.39059 0.769231
II.ERM.BHZ.00 2021-12-09T02:09:03.82 10.0 negative automatic P 37 16.8578 -0.178965 0.909091
JP.JTM.BHZ. 2021-12-09T02:08:39.70 10.0 positive automatic P 36 14.8856 1.03398 0.888889
IU.MAJO.BHZ.00 2021-12-09T02:07:36.97 10.0 positive automatic P 43 10.3045 0.741543 0.909091
JP.JSG.BHZ. 2021-12-09T02:07:24.00 10.0 positive automatic P 51 9.1331 3.87186 0.930233
JP.JGF.BHZ. 2021-12-09T02:07:21.05 10.0 positive automatic P 44 9.164 0.417888 0.952381
G.INU.BHZ.00 2021-12-09T02:07:15.96 10.0 negative automatic P 44 8.7974 0.429545 0.615385
IU.TATO.BHZ.00 2021-12-09T02:07:12.47 10.0 negative automatic P 241 8.3124 3.58274 0.851064
JP.YOJ.BHZ. 2021-12-09T02:07:00.05 10.0 positive automatic P 232 7.5159 2.10735 0.909091
JP.JMN.BHZ. 2021-12-09T02:06:34.45 10.0 positive automatic P 39 5.817 -0.256681 0.952381
JP.JTU.BHZ. 2021-12-09T02:06:24.90 10.0 positive automatic P 359 5.2604 -2.08303 0.43956
JP.JMZ.BHZ. 2021-12-09T02:06:07.75 10.0 positive automatic P 156 3.7714 1.23265 0.615385
JP.JOW.BHZ. 2021-12-09T02:05:51.00 10.0 positive automatic P 204 2.6614 -0.290038 0.952381
JP.JSU.BHZ. 2021-12-09T02:05:45.55 10.0 positive automatic P 20 2.3878 -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