Earthquake with magnitude of Mwp 7.1 on date 13-02-2021 and time 14:07:51 (UTC) in region Near east coast of eastern Honshu, Japan [Sea: Japan]

A magnitude Mwp 7.1 earthquake occured in region: Near east coast of eastern Honshu, Japan [Sea: Japan], on

  • 13-02-2021 14:07:51 (UTC)
  • 13-02-2021 15:07:51 (UTC +01:00) Italian time
  • 13-02-2021 23:07:51 (UTC +09:00) local time in the region of the earthquake (Asia/Tokyo)

and geographic coordinates (lat, lon) 37.73, 141.74 at 63 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
The earthquake effects in MCS scale as obtained from the compiled questionnaire

The earthquake effects in MCS scale as obtained from the compiled 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 5.9
Mwp 7.1

Mwpd 7.2
2021-02-13
14:07:51
37.73 141.74 63 2021-02-13
14:20:06
Sala Sismica INGV-Roma 87113411
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-02-13 14:07:51
Latitude 37.73
Longitude 141.74
Depth (km) 63 (from location)
Evaluation mode of Origin automatic
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV-A
Event type earthquake
Origin ID 87113411

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 5743
Semi-minor axis of confidence ellipse (meter) 3205
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 303
Circular confidence region, given by single value of horizontal uncertainty (meter) 4763.6
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 73.1071
Number of associated phases, regardless of their use for origin computation 52
Number of defining phases 52
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 1.66188
Epicentral distance of station closest to the epicenter (degree) 0.75984
Epicentral distance of station farthest from the epicenter (degree) 44.04446
Number of stations at which the event was observed 40
Number of stations from which data was used for origin computation 40
Magnitudes information

Mwp:7.1

Field Value
Value 7.1
Uncertainty 0.2
Num. used stations 21
Type of magnitude Mwp
Reference to an origin 87113411
Agency INGV
Autore early-est_ee1.1.9
Time of creation (UTC) 2021-02-13 14:20:06

Mwpd:7.2

Field Value
Value 7.2
Uncertainty 0.2
Num. used stations 10
Type of magnitude Mwpd
Reference to an origin 87113411
Agency INGV
Autore early-est_ee1.1.9
Time of creation (UTC) 2021-02-13 14:20:06

mb:5.9

Field Value
Value 5.9
Uncertainty 0.1
Num. used stations 16
Type of magnitude mb
Reference to an origin 87113411
Agency INGV
Autore early-est_ee1.1.9
Time of creation (UTC) 2021-02-13 14:20:06
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IU.MAKZ.BHZ.00 2021-02-13T14:15:53.72 10.0 positive automatic P 302 44.0445 0.791917 0.679284
IN.SHL.HHZ. 2021-02-13T14:15:49.81 10.0 positive automatic P 269 43.6247 0.353839 0.702301
GE.BNDI.BHZ. 2021-02-13T14:15:48.72 10.0 positive automatic P 197 43.6566 -0.994375 0.438289
GE.GENI.BHZ. 2021-02-13T14:15:44.47 10.0 positive automatic sP 182 40.345 -1.01158 0
GE.LUWI.BHZ. 2021-02-13T14:15:37.77 10.0 positive automatic P 209 42.5427 -2.94809 0.667154
GE.SANI.BHZ. 2021-02-13T14:15:37.02 10.0 positive automatic P 204 42.3627 -2.24485 0.670361
IU.CHTO.BHZ.00 2021-02-13T14:15:33.00 10.0 positive automatic P 255 41.6889 0.152277 0.714937
GE.TNTI.BHZ. 2021-02-13T14:15:31.72 10.0 negative automatic pP 203 39.2513 2.37506 0
GE.GENI.BHZ. 2021-02-13T14:15:22.52 10.0 positive automatic P 182 40.345 -0.215309 0.74051
RM.DLV.BHZ. 2021-02-13T14:15:15.12 10.0 positive automatic P 238 39.3019 0.841076 0.726093
GE.TNTI.BHZ. 2021-02-13T14:15:12.52 10.0 positive automatic P 203 39.2513 -1.13732 0.727034
II.KWJN.BHZ.00 2021-02-13T14:14:54.17 10.0 negative automatic P 134 36.7257 1.78346 0.774724
RM.SLV.BHZ. 2021-02-13T14:14:50.42 10.0 positive automatic P 254 36.439 0.361782 0.817387
AK.ATKA.BHZ. 2021-02-13T14:14:36.45 10.0 positive automatic pP 50 33.7129 -5.49183 0
IU.TIXI.BHZ.00 2021-02-13T14:14:33.77 10.0 negative automatic P 353 34.5422 0.0814205 0.817176
AK.ATKA.BHZ. 2021-02-13T14:14:28.41 10.0 positive automatic P 50 33.7129 1.89676 0.849033
IU.ADK.BHZ.00 2021-02-13T14:14:15.35 10.0 positive automatic P 50 32.1531 2.43497 0.895451
II.TLY.BHZ.00 2021-02-13T14:13:54.12 10.0 negative automatic P 310 29.9954 0.129994 0.714286
IU.WAKE.BHZ.00 2021-02-13T14:13:42.17 10.0 positive automatic P 123 28.4601 1.88777 0.930233
IU.ULN.BHZ.00 2021-02-13T14:13:28.22 10.0 positive automatic P 303 27.1112 -0.301835 0.769231
IU.YAK.BHZ.00 2021-02-13T14:13:11.97 10.0 positive automatic P 347 25.4167 -1.00587 0.816327
IU.GUMO.BHZ.00 2021-02-13T14:12:59.90 10.0 positive automatic P 173 24.2981 -2.92504 0.851064
IU.MA2.BHZ.00 2021-02-13T14:12:46.32 10.0 positive automatic P 12 22.5995 -0.284639 0.888889
IU.TATO.BHZ.00 2021-02-13T14:12:32.62 10.0 negative automatic P 239 21.3978 -1.17256 0.43956
JP.YOJ.BHZ. 2021-02-13T14:12:23.05 10.0 negative automatic P 236 20.7323 -3.57407 0.43956
IU.PET.BHZ.00 2021-02-13T14:12:10.77 10.0 negative automatic P 32 19.2653 0.0469736 0.615385
JP.JOW.BHZ. 2021-02-13T14:11:26.95 10.0 negative automatic P 230 15.7199 -1.87061 0.952381
JP.JMZ.BHZ. 2021-02-13T14:11:18.05 10.0 negative automatic P 220 14.8643 0.240913 0.615385
IU.INCN.BHZ.00 2021-02-13T14:10:40.67 10.0 negative automatic P 273 11.9604 1.75036 0.816327
JP.JSU.BHZ. 2021-02-13T14:10:28.75 10.0 negative automatic P 240 11.1609 0.676977 0.952381
JP.JTU.BHZ. 2021-02-13T14:10:19.70 10.0 positive automatic P 256 10.4569 1.29061 0.930233
IU.YSS.BHZ.00 2021-02-13T14:09:59.15 10.0 negative automatic P 4 9.2612 -2.93635 0.727273
JP.JMN.BHZ. 2021-02-13T14:09:38.20 10.0 positive automatic P 240 7.5231 -0.188908 0.952381
JP.JKA.BHZ. 2021-02-13T14:09:21.00 10.0 negative automatic S 11 3.4549 -1.11475 0
JP.JHJ2.BHZ. 2021-02-13T14:09:00.05 10.0 positive automatic P 199 4.8704 -1.94908 0.909091
G.INU.BHZ.00 2021-02-13T14:08:57.21 10.0 negative automatic P 239 4.4653 0.748871 0.888889
II.ERM.BHZ.00 2021-02-13T14:08:53.67 10.0 positive automatic P 14 4.4235 -2.20641 0.952381
JP.JSG.BHZ. 2021-02-13T14:08:53.25 10.0 positive automatic P 224 4.1845 0.633862 0.888889
JP.JGF.BHZ. 2021-02-13T14:08:52.65 10.0 negative automatic P 240 4.1048 1.04367 0.909091
IU.MAJO.BHZ.00 2021-02-13T14:08:37.82 10.0 negative automatic P 248 3.0524 0.630686 0.930233
JP.JTM.BHZ. 2021-02-13T14:08:37.45 10.0 negative automatic P 351 3.105 -0.411661 0.952381
JP.JSD.BHZ. 2021-02-13T14:08:32.75 10.0 negative automatic P 278 2.762 -0.431151 0.930233
JP.JMM.BHZ. 2021-02-13T14:08:09.20 10.0 positive automatic P 281 0.7598 2.74552 0.888889
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download