Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of Mwp 5.9 on date 04-10-2023 and time 04:55:48 (UTC) in region Southeast of Honshu, Japan [Sea: Japan]

A magnitude Mwp 5.9 earthquake occured in region: Southeast of Honshu, Japan [Sea: Japan], on

  • 04-10-2023 04:55:48 (UTC)
  • 04-10-2023 06:55:48 (UTC +02:00) Italian time
  • 04-10-2023 13:55:48 (UTC +09:00) local time in the region of the earthquake (Asia/Tokyo)

and geographic coordinates (lat, lon) 31.0040, 142.0010 at 9 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 5.2
Mwp 5.9
Mwpd 5.9 		2023-10-04
04:55:48		 31.0043 142.001 9 2023-10-04
05:11:44		 Sala Sismica INGV-Roma 121736181
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-10-04 04:55:48
Latitude 31.0043
Longitude 142.0010
Depth (km) 9 (from location)
Evaluation mode of Origin automatic
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV-A
Event type earthquake
Origin ID 121736181

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 8395203
Semi-minor axis of confidence ellipse (meter) 7061231
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 14
Circular confidence region, given by single value of horizontal uncertainty (meter) 6778830.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 114.691
Number of associated phases, regardless of their use for origin computation 91
Number of defining phases 91
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 1.71099
Epicentral distance of station closest to the epicenter (degree) 9.81394
Epicentral distance of station farthest from the epicenter (degree) 96.13826
Number of stations at which the event was observed 91
Number of stations from which data was used for origin computation 91
Magnitudes information

Mwpd:5.9

Field Value
Value 5.9
Uncertainty 0.2
Num. used stations 20
Type of magnitude Mwpd
Reference to an origin 121736181
Agency INGV
Autore Auto added
Time of creation (UTC) 2023-10-04 05:11:44

Mwp:5.9

Field Value
Value 5.9
Uncertainty 0.1
Num. used stations 24
Type of magnitude Mwp
Reference to an origin 121736181
Agency INGV
Autore Auto added
Time of creation (UTC) 2023-10-04 05:11:44

mb:5.2

Field Value
Value 5.2
Uncertainty 0.1
Num. used stations 84
Type of magnitude mb
Reference to an origin 121736181
Agency INGV
Autore Auto added
Time of creation (UTC) 2023-10-04 05:11:44
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
US.MIAR.BHZ.00 2023-10-04T05:09:17.28 10.0 positive automatic P 43 10671.3513 -0.39957 0.0905833
RD.ORIF.BHZ. 2023-10-04T05:09:09.18 10.0 positive automatic P 331 10459.1637 1.74284 0.0947367
RD.LOR.BHZ. 2023-10-04T05:09:04.10 10.0 positive automatic P 333 10338.4068 1.76457 0.096065
HL.VLS.HHZ. 2023-10-04T05:08:59.59 10.0 positive automatic P 318 10198.1805 3.10736 0.103518
US.KSU1.BHZ.00 2023-10-04T05:08:58.28 10.0 positive automatic P 41 10126.8519 4.02187 0.0940267
IV.SALO.BHZ. 2023-10-04T05:08:57.60 10.0 positive automatic P 328 10173.5052 1.55077 0.0996662
HL.ITM.HHZ. 2023-10-04T05:08:55.37 10.0 positive automatic P 316 10186.5033 -0.152544 0.103755
OE.DAVA.BHZ. 2023-10-04T05:08:52.77 10.0 positive automatic P 330 10062.5496 0.711274 0.101876
US.MNTX.BHZ.00 2023-10-04T05:08:52.10 10.0 positive automatic P 52 10051.8381 1.73461 0.048778
II.BFO.BHZ.00 2023-10-04T05:08:51.47 10.0 positive automatic P 331 10045.0116 0.87355 0.0955651
IV.PTCC.BHZ. 2023-10-04T05:08:46.30 10.0 positive automatic P 327 9964.3035 -0.628188 0.103895
US.ECSD.BHZ.00 2023-10-04T05:08:39.78 10.0 positive automatic P 38 9776.1141 1.06068 0.109204
MN.DIVS.BHZ. 2023-10-04T05:08:39.20 10.0 positive automatic P 322 9784.872 -0.289388 0.110306
HU.KOVH.BHZ. 2023-10-04T05:08:38.50 10.0 positive automatic P 325 9738.1743 1.43164 0.108777
US.SDCO.BHZ.00 2023-10-04T05:08:34.80 10.0 positive automatic P 47 9633.3903 1.91276 0.113803
IU.TUC.BHZ.00 2023-10-04T05:08:33.17 10.0 positive automatic P 54 9601.833 0.411408 0.109345
GE.CSS.BHZ. 2023-10-04T05:08:29.10 10.0 positive automatic P 309 9542.1261 0.306769 0.103651
US.AGMN.BHZ.00 2023-10-04T05:08:28.78 10.0 positive automatic P 34 9472.2294 3.44498 0.107473
GE.PSZ.BHZ. 2023-10-04T05:08:27.70 10.0 positive automatic P 325 9499.4244 0.162674 0.109233
US.MVCO.BHZ.00 2023-10-04T05:08:26.65 10.0 positive automatic P 49 9458.2212 1.63387 0.118057
GE.MORC.BHZ. 2023-10-04T05:08:26.45 10.0 positive automatic P 328 9479.4777 0.0178966 0.114795
PL.KSP.BHZ. 2023-10-04T05:08:25.71 10.0 positive automatic P 329 9457.7439 0.322212 0.118069
KO.MDUB.HHZ. 2023-10-04T05:08:23.27 10.0 positive automatic P 314 9334.9335 4.05031 0.122362
US.WUAZ.BHZ.00 2023-10-04T05:08:22.30 10.0 positive automatic P 52 9354.8469 0.734081 0.11652
IU.ANTO.BHZ.00 2023-10-04T05:08:17.20 10.0 positive automatic P 313 9264.5262 0.652047 0.108055
GE.TIRR.BHZ. 2023-10-04T05:08:16.27 10.0 positive automatic P 319 9250.4403 0.842604 0.165636
PL.KWP.BHZ. 2023-10-04T05:08:15.04 10.0 positive automatic P 325 9219.3048 0.423618 0.0138062
KO.BNN.HHZ. 2023-10-04T05:08:10.63 10.0 positive automatic P 311 9112.8558 1.70753 0.119762
II.PFO.BHZ.00 2023-10-04T05:08:08.87 10.0 positive automatic P 56 9081.6093 0.3011 0.123637
US.BW06.BHZ.00 2023-10-04T05:08:06.53 10.0 positive automatic P 45 9027.3969 1.5244 0.131157
US.HWUT.BHZ.00 2023-10-04T05:08:03.88 10.0 positive automatic P 47 8962.9836 2.03127 0.129918
US.DUG.BHZ.00 2023-10-04T05:08:02.40 10.0 positive automatic P 48 8961.585 0.68373 0.13309
US.AHID.BHZ.00 2023-10-04T05:08:01.20 10.0 positive automatic P 45 8923.5342 1.23853 0.134228
US.TPNV.BHZ.00 2023-10-04T05:08:00.43 10.0 positive automatic P 53 8902.2666 0.361666 0.136515
IU.KIEV.BHZ.00 2023-10-04T05:07:53.12 10.0 positive automatic P 324 8783.9295 0.29995 0.136879
US.ELK.BHZ.00 2023-10-04T05:07:53.83 10.0 positive automatic P 49 8755.8909 2.03643 0.141117
US.BOZ.BHZ.00 2023-10-04T05:07:51.38 10.0 positive automatic P 43 8715.5979 1.6911 0.047475
US.EGMT.BHZ.00 2023-10-04T05:07:49.90 10.0 positive automatic P 40 8686.5048 1.7542 0.136712
II.FFC.BHZ.00 2023-10-04T05:07:49.20 10.0 positive automatic P 32 8687.1264 0.701174 0.143361
US.HLID.BHZ.00 2023-10-04T05:07:48.73 10.0 positive automatic P 46 8649.9636 2.28233 0.141152
BK.CMB.BHZ.00 2023-10-04T05:07:41.80 10.0 positive automatic P 53 8527.1088 0.671365 0.145249
GE.SUMG.BHZ.10 2023-10-04T05:07:39.80 10.0 positive automatic P 0 8482.3425 1.59232 0.146786
US.MSO.BHZ.00 2023-10-04T05:07:39.90 10.0 positive automatic P 43 8492.5767 1.50273 0.146433
US.WVOR.BHZ.00 2023-10-04T05:07:36.35 10.0 positive automatic P 49 8417.7627 0.891201 0.142273
US.BMO.BHZ.00 2023-10-04T05:07:34.25 10.0 positive automatic P 46 8379.0348 1.7023 0.141977
II.KIV.BHZ.00 2023-10-04T05:07:31.42 10.0 positive automatic P 313 8332.2594 0.651291 0.166366
US.NEW.BHZ.00 2023-10-04T05:07:25.00 10.0 positive automatic P 43 8206.4964 1.5323 0.149692
US.HAWA.BHZ.00 2023-10-04T05:07:22.15 10.0 positive automatic P 45 8145.3909 1.05494 0.161101
GE.DAG.BHZ. 2023-10-04T05:07:09.47 10.0 positive automatic P 355 7942.4607 0.697566 0.0817639
US.NLWA.BHZ.00 2023-10-04T05:07:04.28 10.0 positive automatic P 46 7801.4019 1.15924 0.167547
IU.KEV.BHZ.00 2023-10-04T05:06:55.42 10.0 positive automatic P 340 7661.4531 1.71741 0.160788
AU.TOO.BHZ.00 2023-10-04T05:06:50.93 10.0 positive automatic P 177 7620.1722 -0.564354 0.175612
IU.NWAO.BHZ.00 2023-10-04T05:06:45.92 10.0 positive automatic P 202 7556.6913 -0.817602 0.182777
AU.MORW.BHZ. 2023-10-04T05:06:25.82 10.0 positive automatic P 205 7209.7941 -1.24814 0.193944
AU.HTT.BHZ.00 2023-10-04T05:06:23.93 10.0 positive automatic P 183 7159.2447 -1.04472 0.198955
AU.FORT.BHZ.00 2023-10-04T05:06:13.75 10.0 positive automatic P 193 7013.202 -2.46068 0.219969
AU.ARMA.BHZ. 2023-10-04T05:06:11.72 10.0 positive automatic P 171 6892.7781 1.71986 0.222302
II.ARTI.BHZ.00 2023-10-04T05:06:02.52 10.0 positive automatic P 321 6793.0224 -0.416331 0.218475
AT.SKAG.BHZ. 2023-10-04T05:05:57.36 10.0 positive automatic P 36 6665.4945 0.715651 0.242337
II.JZAX.BHZ.00 2023-10-04T05:05:50.87 10.0 positive automatic P 301 6591.2466 0.345082 0.343135
CN.CROWY.BHZ. 2023-10-04T05:05:36.15 10.0 positive automatic P 26 6335.7912 1.71956 0.269526
AU.EIDS.BHZ. 2023-10-04T05:05:35.32 10.0 positive automatic P 170 6331.0293 1.59613 0.26668
AU.WRKA.BHZ.00 2023-10-04T05:05:34.15 10.0 positive automatic P 195 6388.4163 -3.63694 0.265104
US.EGAK.BHZ.00 2023-10-04T05:05:32.18 10.0 positive automatic P 30 6292.5012 0.559456 0.121773
IU.MBWA.BHZ.00 2023-10-04T05:05:26.65 10.0 positive automatic P 205 6257.07 -1.95504 0.273021
II.BORK.BHZ.00 2023-10-04T05:05:19.35 10.0 positive automatic P 316 6104.7669 -0.148545 0.36959
IU.COLA.BHZ.00 2023-10-04T05:05:12.57 10.0 positive automatic P 30 5976.1734 0.757329 0.299293
II.KDAK.BHZ.00 2023-10-04T05:04:52.37 10.0 positive automatic P 38 5688.6501 0.169468 0.318792
GE.GSI.BHZ. 2023-10-04T05:04:51.32 10.0 positive automatic P 244 5706.6654 -1.36106 0.316781
AU.FITZ.BHZ. 2023-10-04T05:04:51.73 10.0 positive automatic P 200 5723.16 -1.79046 0.314959
IU.CTAO.BHZ.00 2023-10-04T05:04:50.45 10.0 positive automatic P 175 5689.1163 -1.14891 0.297952
II.KURK.BHZ.00 2023-10-04T05:04:42.20 10.0 positive automatic P 312 5557.437 -0.146424 0.346098
PS.PSI.BHZ. 2023-10-04T05:04:40.06 10.0 positive automatic P 244 5493.0459 2.30788 0.350044
IU.MAKZ.BHZ.00 2023-10-04T05:04:27.05 10.0 positive automatic P 307 5331.7962 0.114843 0.380601
GE.JAGI.BHZ. 2023-10-04T05:04:22.02 10.0 positive automatic P 219 5288.373 -1.27293 0.368882
MY.KUM.BHZ. 2023-10-04T05:04:14.92 10.0 positive automatic P 245 5162.8875 -0.693083 0.387035
AU.MTN.BHZ.00 2023-10-04T05:04:01.65 10.0 positive automatic P 195 5003.0031 -2.44705 0.104255
AU.KDU.BHZ.00 2023-10-04T05:03:58.70 10.0 positive automatic P 193 4954.8069 -1.91776 0.440727
II.KAPI.BHZ.00 2023-10-04T05:03:36.07 10.0 positive automatic P 214 4641.7092 -1.88004 0.242236
IU.CHTO.BHZ.00 2023-10-04T05:03:26.42 10.0 positive automatic P 263 4509.597 -1.66491 0.525645
MY.SBM.BHZ. 2023-10-04T05:03:22.22 10.0 positive automatic P 230 4447.6701 -1.71109 0.477148
GE.SANI.BHZ. 2023-10-04T05:02:49.02 10.0 positive automatic P 208 4039.9116 -2.68739 0.647196
II.TLY.BHZ.00 2023-10-04T05:02:39.87 10.0 positive automatic P 318 3865.6416 0.614509 0.891456
IU.ULN.BHZ.00 2023-10-04T05:02:08.82 10.0 positive automatic P 313 3488.0529 -0.47136 0.797915
IU.TATO.BHZ.00 2023-10-04T05:00:10.57 10.0 positive automatic P 257 2114.2947 -0.0869528 0.930233
IU.YSS.BHZ.00 2023-10-04T04:59:30.50 10.0 positive automatic P 2 1772.0484 -2.15142 0.909091
PS.TJN.BHZ. 2023-10-04T04:58:57.71 10.0 positive automatic P 298 1475.3787 1.05836 0.925249
JP.JTU.BHZ. 2023-10-04T04:58:29.45 10.0 positive automatic P 292 1238.6823 1.21663 1.13457
II.ERM.BHZ.00 2023-10-04T04:58:23.97 10.0 positive automatic P 4 1226.439 -1.40763 0.930233
JP.JSU.BHZ. 2023-10-04T04:58:13.15 10.0 positive automatic P 276 1096.6689 2.56394 0.974091
JP.JTM.BHZ. 2023-10-04T04:58:06.25 10.0 positive automatic P 356 1089.3429 -2.16684 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