Earthquake with magnitude of Mwp 5.9 on date 14-09-2021 and time 00:46:06 (Italy) in region Southeast of Honshu, Japan [Sea: Japan]

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

  • 13-09-2021 22:46:06 (UTC)
  • 14-09-2021 00:46:06 (UTC +02:00) Italian time
  • 14-09-2021 07:46:06 (UTC +09:00) local time in the region of the earthquake (Asia/Tokyo)

and geographic coordinates (lat, lon) 32.34, 137.984 at 374 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 adjourned progressively as more data become available. See http://shakemap.rm.ingv.it/ for additional information.

The red star indicates the epicenter. The red triangles show the stations of the INGV Italian National Seismic Network and the blue triangles those of the Nationa Accelerometric Network of the Dipartimento della Protezione Civile.

Intensity Shakemap

Intensity Shakemap

This map shows the distribution of the istrumentally derived intensities. To this purpose, it is used a conversion relation between ground acceleration and velocity, and the Mercalli Modificata (MMI - Modified Mercalli Intensity) scale. In general, the Mercalli intensity scale relies on the effects that the ground shaking produces as reported by an observer.
Peak ground acceleration Shakemap

Peak ground acceleration Shakemap

This map shows This map shows the distribution of peak ground acceleration expressed as per cent 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 the effects of the earthquake on the territory in terms of the MCS (Mercalli-Cancani-Sieberg) intensity scale. The intensities are determined using the data provided in the questionnaire (http://www.haisentitoilterremoto.it/) that are analysed using robust statistical techniques since they are not verified individually. Specifically, the assignment of MCS intensities greater or equal the VI degree of the MCS scale require opportune in situ verification by professional experts. The purple start shows the epicenter. This map is prepared every so often that the population fill in new questionnaires. The number of questionnaires used to determine the map and the date and time of the last adjournment are shown in the upper right part of the panel.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100
mb 5.4
Mwp 5.9

Mwpd 6.0
2021-09-13
22:46:06
32.3402 137.984 374 2021-09-13
23:03:52
Sala Sismica INGV-Roma 95396691
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-13 22:46:06
Latitude 32.3402
Longitude 137.9840
Depth (km) 374 (from location)
Evaluation mode of Origin automatic
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV-A
Event type earthquake
Origin ID 95396691

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 7193
Semi-minor axis of confidence ellipse (meter) 5500
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 311
Circular confidence region, given by single value of horizontal uncertainty (meter) 6276.2
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 24.7121
Number of associated phases, regardless of their use for origin computation 77
Number of defining phases 77
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 1.34384
Epicentral distance of station closest to the epicenter (degree) 1.7231
Epicentral distance of station farthest from the epicenter (degree) 69.92152
Number of stations at which the event was observed 72
Number of stations from which data was used for origin computation 72
Magnitudes information

Mwp:5.9

Field Value
Value 5.9
Uncertainty 0.1
Num. used stations 25
Type of magnitude Mwp
Reference to an origin 95396691
Agency INGV
Autore early-est_ee1.1.9
Time of creation (UTC) 2021-09-13 23:03:52

Mwpd:6

Field Value
Value 6
Uncertainty 0
Num. used stations 13
Type of magnitude Mwpd
Reference to an origin 95396691
Agency INGV
Autore early-est_ee1.1.9
Time of creation (UTC) 2021-09-13 23:03:52

mb:5.4

Field Value
Value 5.4
Uncertainty 0.2
Num. used stations 49
Type of magnitude mb
Reference to an origin 95396691
Agency INGV
Autore early-est_ee1.1.9
Time of creation (UTC) 2021-09-13 23:03:52
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
GE.DAG.BHZ. 2021-09-13T22:56:39.56 10.0 negative automatic P 354 69.9215 1.81219 0.268811
G.CAN.BHZ.00 2021-09-13T22:56:29.05 10.0 positive automatic P 170 68.4401 0.187723 0.299422
AU.NFK.BHZ.00 2021-09-13T22:56:25.58 10.0 positive automatic P 152 67.6462 1.68887 0.297844
IU.NWAO.BHZ.00 2021-09-13T22:56:25.27 10.0 negative automatic P 199 68.1335 -1.65682 0.31057
IU.XMAS.BHZ.00 2021-09-13T22:56:25.27 10.0 positive automatic P 102 67.5606 1.93709 0.317819
CN.RES.BHZ. 2021-09-13T22:56:24.35 10.0 negative automatic P 13 67.5812 0.890148 0.313732
IU.AFI.BHZ.00 2021-09-13T22:56:19.72 10.0 negative automatic P 126 66.6721 1.79686 0.31761
IU.KEV.BHZ.00 2021-09-13T22:56:17.72 10.0 positive automatic P 339 66.592 0.405414 0.322405
AU.HTT.BHZ. 2021-09-13T22:56:12.25 10.0 positive automatic P 179 65.7739 -0.0381222 0
GE.KBS.BHZ.00 2021-09-13T22:56:05.37 10.0 positive automatic P 350 64.5616 0.904128 0.116212
AU.ARMA.BHZ. 2021-09-13T22:56:01.77 10.0 positive automatic P 167 64.0733 0.258885 0.355097
AU.FORT.BHZ.00 2021-09-13T22:55:58.45 10.0 negative automatic P 189 63.8122 -1.21651 0.367322
AT.CRAG.BHZ. 2021-09-13T22:55:58.42 10.0 positive automatic P 39 63.2565 2.37217 0.366037
II.MSVF.BHZ.00 2021-09-13T22:55:57.42 10.0 positive automatic P 137 63.0757 2.41888 0.343916
AT.SKAG.BHZ. 2021-09-13T22:55:43.08 10.0 positive automatic P 35 60.9489 2.18306 0.354013
ND.ONTNC.BHZ.00 2021-09-13T22:55:42.55 10.0 positive automatic P 150 61.0452 1.01748 0.378467
CN.INK.BHZ. 2021-09-13T22:55:32.90 10.0 positive automatic P 25 59.6471 0.739631 0.402014
II.PALK.BHZ.00 2021-09-13T22:55:25.65 10.0 negative automatic P 258 58.6175 0.388638 0.43652
ND.KOUNC.BHZ.00 2021-09-13T22:55:25.95 10.0 positive automatic P 151 58.5691 1.08893 0.421985
GE.MALK.BHZ. 2021-09-13T22:55:21.77 10.0 positive automatic P 259 58.1321 -0.107183 0.347461
II.ARTI.BHZ.00 2021-09-13T22:55:20.52 10.0 negative automatic P 320 57.9961 -0.460418 0.440474
AU.WRKA.BHZ.00 2021-09-13T22:55:20.83 10.0 positive automatic P 190 58.1148 -1.02125 0.444004
IU.MBWA.BHZ.00 2021-09-13T22:55:07.60 10.0 negative automatic P 201 56.2739 -1.44078 0.477715
G.SANVU.BHZ.00 2021-09-13T22:55:02.85 10.0 positive automatic P 145 55.3683 0.189186 0.429149
II.SIMI.BHZ.00 2021-09-13T22:55:01.67 10.0 negative automatic P 297 55.1903 0.273363 0.482994
IU.COLA.BHZ.00 2021-09-13T22:54:56.47 10.0 positive automatic P 30 54.3863 0.737303 0.433596
II.KDAK.BHZ.00 2021-09-13T22:54:41.20 10.0 positive automatic P 39 52.3484 0.119391 0.45262
II.WRAB.BHZ.00 2021-09-13T22:54:39.90 10.0 positive automatic P 184 52.3865 -1.49324 0.546974
AT.TTA.BHZ. 2021-09-13T22:54:29.06 10.0 positive automatic P 32 50.7479 -0.447308 0.570623
II.AAK.BHZ.00 2021-09-13T22:54:25.67 10.0 negative automatic P 301 50.2226 -0.0649439 0.537484
IU.JOHN.BHZ.00 2021-09-13T22:54:24.17 10.0 positive automatic P 95 49.7028 2.57867 0.578702
GE.GSI.BHZ. 2021-09-13T22:54:15.77 10.0 negative automatic P 239 49.0527 -0.984011 0.582831
GE.LHMI.BHZ. 2021-09-13T22:54:01.07 10.0 positive automatic P 244 46.8892 0.707662 0.592064
II.KURK.BHZ.00 2021-09-13T22:53:57.75 10.0 negative automatic P 311 46.6317 -0.681481 0.632317
GE.JAGI.BHZ. 2021-09-13T22:53:56.37 10.0 positive automatic P 213 46.7135 -2.67711 0.623349
AU.KDU.BHZ.00 2021-09-13T22:53:47.05 10.0 positive automatic P 188 45.3329 -1.34038 0.618451
IU.MAKZ.BHZ.00 2021-09-13T22:53:41.80 10.0 negative automatic P 306 44.4925 -0.147021 0.671068
GE.SOEI.BHZ. 2021-09-13T22:53:37.32 10.0 negative automatic P 200 44.0855 -1.51412 0.6549
II.KAPI.BHZ.00 2021-09-13T22:53:15.05 10.0 negative automatic P 208 41.1785 -0.578375 0.699656
IU.BILL.BHZ.00 2021-09-13T22:53:00.17 10.0 positive automatic P 16 39.3142 -0.348218 0.760477
GE.BKB.BHZ. 2021-09-13T22:52:58.27 10.0 negative automatic P 215 38.9329 0.910074 0.68622
IU.MIDW.BHZ.00 2021-09-13T22:52:56.42 10.0 positive automatic P 84 38.4994 2.63062 0.795348
MY.SBM.BHZ. 2021-09-13T22:52:53.07 10.0 negative automatic P 224 38.4571 -0.408938 0.680086
IU.ADK.BHZ.00 2021-09-13T22:52:50.30 10.0 positive automatic P 45 38.0455 0.228548 0.814445
IU.CHTO.BHZ.00 2021-09-13T22:52:45.32 10.0 negative automatic P 259 37.467 -0.0136309 0.796835
GE.LUWI.BHZ. 2021-09-13T22:52:33.47 10.0 negative automatic P 206 36.3476 -2.47548 0.260681
GE.SANI.BHZ. 2021-09-13T22:52:32.77 10.0 positive automatic P 201 36.2164 -2.07773 0.75046
RM.DLV.BHZ. 2021-09-13T22:52:15.87 10.0 negative automatic P 240 33.8819 0.5353 0.849595
AT.SMY.BHZ. 2021-09-13T22:52:09.20 10.0 positive automatic P 41 32.9636 1.90185 0.872415
GE.TNTI.BHZ. 2021-09-13T22:52:08.17 10.0 negative automatic P 200 33.1161 -0.427203 0.907435
RM.SLV.BHZ. 2021-09-13T22:52:00.72 10.0 negative automatic P 259 32.1735 0.115892 0.905731
II.TLY.BHZ.00 2021-09-13T22:51:55.42 10.0 negative automatic P 318 31.5406 0.292509 0.919217
IU.YAK.BHZ.00 2021-09-13T22:51:41.57 10.0 positive automatic P 352 30.1665 -1.53421 0.926773
IU.MA2.BHZ.00 2021-09-13T22:51:28.17 10.0 positive automatic P 14 28.5337 -0.656884 0.909091
IU.ULN.BHZ.00 2021-09-13T22:51:24.42 10.0 negative automatic P 313 28.004 0.0402394 0.952381
IU.TATO.BHZ.00 2021-09-13T22:49:32.22 10.0 negative automatic P 247 16.2073 -0.394829 0.909091
JP.YOJ.BHZ. 2021-09-13T22:49:22.05 10.0 negative automatic P 243 15.3195 -0.953101 0.888889
IU.YSS.BHZ.00 2021-09-13T22:49:19.85 10.0 positive automatic P 13 15.0656 -0.41695 0.952381
JP.JCJ.BHZ. 2021-09-13T22:48:52.90 10.0 negative automatic S 144 6.3865 -6.66675 0
IU.INCN.BHZ.00 2021-09-13T22:48:30.92 10.0 positive automatic P 302 10.6269 -0.368308 0.909091
II.ERM.BHZ.00 2021-09-13T22:48:28.12 10.0 positive automatic P 22 10.5102 -1.81872 0.952381
JP.JOW.BHZ. 2021-09-13T22:48:26.70 10.0 negative automatic P 239 10.0729 1.87304 0.952381
JP.JMZ.BHZ. 2021-09-13T22:48:12.70 10.0 negative automatic P 224 8.7941 2.91785 0.952381
JP.JTM.BHZ. 2021-09-13T22:48:07.90 10.0 positive automatic P 15 8.802 -1.98836 0.952381
JP.JTU.BHZ. 2021-09-13T22:47:55.20 10.0 positive automatic P 289 7.4899 0.608737 0.97561
JP.JSU.BHZ. 2021-09-13T22:47:44.20 10.0 positive automatic P 265 6.4445 1.50944 0.909091
JP.JCJ.BHZ. 2021-09-13T22:47:39.55 10.0 positive automatic P 144 6.3865 -2.4421 0.952381
IU.MAJO.BHZ.00 2021-09-13T22:47:17.27 10.0 positive automatic P 2 4.2092 -1.31323 0.97561
JP.JMN.BHZ. 2021-09-13T22:47:14.45 10.0 positive automatic P 293 3.7137 0.70597 0.952381
JP.JGF.BHZ. 2021-09-13T22:47:09.65 10.0 positive automatic P 351 3.3052 -0.301212 0.97561
G.INU.BHZ.00 2021-09-13T22:47:08.31 10.0 positive automatic P 345 3.1124 0.153812 0.97561
JP.JSG.BHZ. 2021-09-13T22:47:03.00 10.0 negative automatic P 4 2.3432 1.07333 0.952381
JP.JHJ2.BHZ. 2021-09-13T22:46:58.00 10.0 negative automatic P 63 1.7231 0.20372 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