Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of Mwp 6.0 on date 28-03-2023 and time 09:18:29 (UTC) in region Japan [Sea]

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

  • 28-03-2023 09:18:29 (UTC)
  • 28-03-2023 11:18:29 (UTC +02:00) Italian time
  • 28-03-2023 20:18:29 (UTC +11:00) local time in the region of the earthquake (Asia/Sakhalin)

and geographic coordinates (lat, lon) 41.1570, 142.7980 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 5.6
Mwp 6.0
Mwpd 6.2 		2023-03-28
09:18:29		 41.1574 142.798 35 2023-03-28
09:30:30		 Sala Sismica INGV-Roma 115816931
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-03-28 09:18:29
Latitude 41.1574
Longitude 142.7980
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 115816931

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 9151
Semi-minor axis of confidence ellipse (meter) 5027
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 125
Circular confidence region, given by single value of horizontal uncertainty (meter) 8367.2
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 60.1172
Number of associated phases, regardless of their use for origin computation 57
Number of defining phases 57
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 1.86141
Epicentral distance of station closest to the epicenter (degree) 0.89867
Epicentral distance of station farthest from the epicenter (degree) 62.94843
Number of stations at which the event was observed 47
Number of stations from which data was used for origin computation 47
Magnitudes information

Mwpd:6.2

Field Value
Value 6.2
Uncertainty 0.1
Num. used stations 16
Type of magnitude Mwpd
Reference to an origin 115816931
Agency INGV
Autore early-est_ee1.1.9
Time of creation (UTC) 2023-03-28 09:30:30

Mwp:6.0

Field Value
Value 6.0
Uncertainty 0.1
Num. used stations 26
Type of magnitude Mwp
Reference to an origin 115816931
Agency INGV
Autore early-est_ee1.1.9
Time of creation (UTC) 2023-03-28 09:30:30

mb:5.6

Field Value
Value 5.6
Uncertainty 0.1
Num. used stations 31
Type of magnitude mb
Reference to an origin 115816931
Agency INGV
Autore early-est_ee1.1.9
Time of creation (UTC) 2023-03-28 09:30:30
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
US.NLWA.BHZ.00 2023-03-28T09:28:54.55 10.0 negative automatic P 49 62.9484 3.07701 0.3616
G.SANVU.BHZ.00 2023-03-28T09:28:50.20 10.0 positive automatic sP 153 60.9476 -1.69129 0
IU.CTAO.BHZ.00 2023-03-28T09:28:38.47 10.0 positive automatic P 176 61.3270 -2.08697 0.387926
G.SANVU.BHZ.00 2023-03-28T09:28:36.20 10.0 negative automatic P 153 60.9476 -1.73643 0.388612
IU.KEV.BHZ.00 2023-03-28T09:28:30.37 10.0 positive automatic P 339 59.7246 0.784883 0.396384
IU.POHA.BHZ.00 2023-03-28T09:28:19.20 10.0 negative automatic sP 93 56.0292 1.09893 0
AU.MTN.BHZ.00 2023-03-28T09:28:09.85 10.0 negative automatic sP 194 55.0652 -0.770576 0
GE.GSI.BHZ. 2023-03-28T09:28:09.57 10.0 positive automatic P 238 56.9624 -0.732234 0.407413
AU.MTN.BHZ.00 2023-03-28T09:27:54.63 10.0 negative automatic P 194 55.0652 -2.11864 0
AU.KDU.BHZ.00 2023-03-28T09:27:50.28 10.0 positive automatic P 192 54.6815 -3.67584 0.490917
G.KIP.BHZ.00 2023-03-28T09:27:44.27 10.0 negative automatic P 93 53.1753 1.3064 0.496991
GE.SOEI.BHZ. 2023-03-28T09:27:44.37 10.0 positive automatic P 203 53.6962 -2.58045 0.483417
CN.ATLI.BHZ. 2023-03-28T09:27:40.70 10.0 positive automatic P 39 52.3494 3.72098 0.0803545
MY.IPM.BHZ. 2023-03-28T09:27:36.02 10.0 positive automatic P 237 52.3213 -0.657755 0.504476
AT.SKAG.BHZ. 2023-03-28T09:27:34.30 10.0 positive automatic P 40 51.6147 2.90454 0.506268
II.KAPI.BHZ.00 2023-03-28T09:27:23.57 10.0 positive automatic P 210 50.7526 -1.38732 0.541357
IU.YAK.BHZ.00 2023-03-28T09:23:18.77 10.0 positive automatic P 344 22.3072 -4.02818 0.909091
CN.EAGLY.BHZ. 2023-03-28T09:27:16.18 10.0 positive automatic P 31 49.2413 2.60879 0
II.AAK.BHZ.00 2023-03-28T09:27:15.77 10.0 positive automatic P 296 49.4147 0.724416 0.576687
US.EGAK.BHZ.00 2023-03-28T09:27:02.93 10.0 positive automatic P 34 47.7173 1.16418 0.58491
MY.SBM.BHZ. 2023-03-28T09:26:59.12 10.0 positive automatic P 224 47.4865 -0.841833 0.595632
IO.EVN.BHZ. 2023-03-28T09:26:58.70 10.0 positive automatic P 272 47.1100 0.847923 0.602055
GE.SANI.BHZ. 2023-03-28T09:26:44.67 10.0 positive automatic P 204 45.8324 -2.30215 0.609923
IU.COLA.BHZ.00 2023-03-28T09:26:41.37 10.0 positive automatic P 34 44.8731 1.96838 0.640927
GE.FAKI.BHZ. 2023-03-28T09:26:39.77 10.0 positive automatic P 195 45.1118 -1.51718 0.636722
IN.SHL.HHZ. 2023-03-28T09:26:35.81 10.0 negative automatic P 266 44.6015 -1.39306 0.687286
II.KURK.BHZ.00 2023-03-28T09:26:34.55 10.0 positive automatic P 305 44.1867 0.625111 0.668651
IU.CHTO.BHZ.00 2023-03-28T09:26:28.37 10.0 positive automatic P 253 43.4321 0.472113 0.699131
II.KDAK.BHZ.00 2023-03-28T09:26:26.80 10.0 positive automatic P 45 43.2076 0.752926 0.662951
IU.MAKZ.BHZ.00 2023-03-28T09:26:25.37 10.0 positive automatic P 299 43.0228 0.747046 0.70688
RM.DLV.BHZ. 2023-03-28T09:26:16.07 10.0 positive automatic P 236 41.8679 0.731603 0.649737
AT.TTA.BHZ. 2023-03-28T09:26:11.94 10.0 negative automatic P 37 41.3085 1.22103 0.743423
AK.GAMB.BHZ. 2023-03-28T09:25:14.63 10.0 positive automatic P 34 34.5531 1.04539 0.847846
IU.ULN.BHZ.00 2023-03-28T09:23:58.82 10.0 positive automatic P 297 26.1015 -0.340284 0.869565
IU.TATO.BHZ.00 2023-03-28T09:23:38.02 10.0 positive automatic P 234 23.9705 -1.52119 0.952381
IU.MA2.BHZ.00 2023-03-28T09:22:44.47 10.0 positive automatic P 12 19.0743 -3.4307 0.727273
JP.JOW.BHZ. 2023-03-28T09:22:40.20 10.0 positive automatic P 224 18.6563 -3.09226 0.784314
JP.JSU.BHZ. 2023-03-28T09:21:41.50 10.0 positive automatic P 230 13.8284 -0.554878 0.833333
IU.INCN.BHZ.00 2023-03-28T09:21:32.47 10.0 positive automatic P 259 13.0195 1.51442 0.816327
JP.JTU.BHZ. 2023-03-28T09:21:24.75 10.0 positive automatic P 242 12.4661 1.34955 0.909091
JP.JMN.BHZ. 2023-03-28T09:20:53.40 10.0 positive automatic P 226 10.2506 0.216331 0.784314
JP.JHJ2.BHZ. 2023-03-28T09:20:27.35 10.0 positive automatic P 197 8.3847 -0.181244 0.909091
JP.JSG.BHZ. 2023-03-28T09:20:17.45 10.0 positive automatic P 211 7.4293 3.01581 0.869565
G.INU.BHZ.00 2023-03-28T09:20:14.71 10.0 positive automatic P 220 7.3612 1.20765 0.784314
JP.JGF.BHZ. 2023-03-28T09:20:10.40 10.0 negative automatic P 219 7.0000 1.77715 0.930233
IU.MAJO.BHZ.00 2023-03-28T09:19:54.12 10.0 positive automatic P 219 5.8345 1.52888 0.851064
IU.YSS.BHZ.00 2023-03-28T09:19:53.10 10.0 positive automatic P 360 5.8011 1.01222 0.784314
JP.JTM.BHZ. 2023-03-28T09:18:51.30 10.0 negative automatic P 255 1.3592 0.260111 0.97561
II.ERM.BHZ.00 2023-03-28T09:18:44.82 10.0 negative automatic P 17 0.8987 0.123533 0.930233
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