Earthquake with magnitude of Mwp 7.0 on date 20-03-2021 and time 09:09:47 (UTC) in region Near east coast of eastern Honshu, Japan [Sea: Japan]

A magnitude Mwp 7.0 earthquake occured in region: Near east coast of eastern Honshu, Japan [Sea: Japan], on

  • 20-03-2021 09:09:47 (UTC)
  • 20-03-2021 10:09:47 (UTC +01:00) Italian time
  • 20-03-2021 18:09:47 (UTC +09:00) local time in the region of the earthquake (Asia/Tokyo)

and geographic coordinates (lat, lon) 38.38, 141.587 at 68 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 5.8
Mwp 7.0

Mwpd 7.2
2021-03-20
09:09:47
38.3801 141.587 68 2021-03-20
09:24:13
Sala Sismica INGV-Roma 88308241
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-03-20 09:09:47
Latitude 38.3801
Longitude 141.5870
Depth (km) 68 (from location)
Evaluation mode of Origin automatic
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV-A
Event type earthquake
Origin ID 88308241

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 6667
Semi-minor axis of confidence ellipse (meter) 5182
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 280
Circular confidence region, given by single value of horizontal uncertainty (meter) 6560.1
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 43.0158
Number of associated phases, regardless of their use for origin computation 102
Number of defining phases 102
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 2.09605
Epicentral distance of station closest to the epicenter (degree) 2.44274
Epicentral distance of station farthest from the epicenter (degree) 69.09096
Number of stations at which the event was observed 85
Number of stations from which data was used for origin computation 85
Magnitudes information

Mwp:7

Field Value
Value 7
Uncertainty 0.2
Num. used stations 53
Type of magnitude Mwp
Reference to an origin 88308241
Agency INGV
Autore early-est_ee1.1.9
Time of creation (UTC) 2021-03-20 09:24:13

Mwpd:7.2

Field Value
Value 7.2
Uncertainty 0.1
Num. used stations 45
Type of magnitude Mwpd
Reference to an origin 88308241
Agency INGV
Autore early-est_ee1.1.9
Time of creation (UTC) 2021-03-20 09:24:13

mb:5.8

Field Value
Value 5.8
Uncertainty 0.1
Num. used stations 50
Type of magnitude mb
Reference to an origin 88308241
Agency INGV
Autore early-est_ee1.1.9
Time of creation (UTC) 2021-03-20 09:24:13
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
GE.HMDM.BHZ. 2021-03-20T09:20:44.82 10.0 positive automatic P 262 68.9139 0.472617 0.26813
GE.SUMG.BHZ. 2021-03-20T09:20:46.95 10.0 positive automatic P 0 69.0426 1.24855 0.278834
US.NEW.BHZ.00 2021-03-20T09:20:45.65 10.0 negative automatic P 44 68.8263 1.71544 0.287872
GE.VSU.BHZ. 2021-03-20T09:20:45.30 10.0 negative automatic P 329 69.091 -0.160504 0.291529
US.HAWA.BHZ.00 2021-03-20T09:20:43.93 10.0 negative automatic P 47 68.5215 1.95688 0.288138
IU.XMAS.BHZ.00 2021-03-20T09:20:41.00 10.0 negative automatic pP 107 66.2717 -3.64291 0
ND.ONTNC.BHZ.00 2021-03-20T09:20:34.10 10.0 negative automatic pP 155 65.0149 -3.41135 0
IU.XMAS.BHZ.00 2021-03-20T09:20:32.15 10.0 negative automatic P 107 66.2717 4.44427 0.322634
GE.PUL.BHZ. 2021-03-20T09:20:32.25 10.0 positive automatic P 329 66.841 0.903153 0
AU.GIRL.BHZ.00 2021-03-20T09:20:28.35 10.0 negative automatic P 208 66.1959 1.11875 0
IU.KEV.BHZ.00 2021-03-20T09:20:27.37 10.0 negative automatic sP 339 61.9837 2.93458 0
ND.ONTNC.BHZ.00 2021-03-20T09:20:22.55 10.0 negative automatic P 155 65.0149 2.92627 0.266536
GE.DAG.BHZ. 2021-03-20T09:20:12.63 10.0 positive automatic P 355 64.1755 -1.51518 0.232141
GE.HALK.BHZ. 2021-03-20T09:20:10.15 10.0 positive automatic P 256 63.5831 -0.114585 0
DK.TULEG.BHZ. 2021-03-20T09:20:09.20 10.0 positive automatic P 8 63.4828 -0.38907 0.317615
ND.KOUNC.BHZ.00 2021-03-20T09:20:07.25 10.0 positive automatic P 156 62.6604 3.09597 0.349185
IU.MBWA.BHZ.00 2021-03-20T09:20:04.37 10.0 negative automatic P 203 62.9707 -1.86273 0.365553
GE.MALK.BHZ. 2021-03-20T09:20:01.12 10.0 positive automatic P 258 62.2154 -0.06869 0.371381
IU.KEV.BHZ.00 2021-03-20T09:20:00.27 10.0 positive automatic P 339 61.9837 0.636013 0.3745
CN.RES.BHZ. 2021-03-20T09:19:52.68 10.0 positive automatic P 15 61.0149 -0.420882 0.0915958
CN.BBB.BHZ. 2021-03-20T09:19:53.90 10.0 positive automatic P 45 60.7897 2.33427 0.184655
DK.NOR.BHZ. 2021-03-20T09:19:42.15 10.0 positive automatic P 356 59.4721 -0.414082 0.374331
GE.KBS.BHZ.00 2021-03-20T09:19:41.37 10.0 positive automatic P 350 59.1175 1.24506 0.404755
G.SANVU.BHZ.00 2021-03-20T09:19:38.05 10.0 negative automatic P 151 58.9359 -0.809115 0.407276
IU.CTAO.BHZ.00 2021-03-20T09:19:35.35 10.0 negative automatic P 175 58.6296 -1.44531 0.373363
AU.FITZ.BHZ. 2021-03-20T09:19:33.83 10.0 positive automatic P 198 58.4289 -1.52688 0.428983
IU.POHA.BHZ.00 2021-03-20T09:19:29.07 10.0 negative automatic P 90 56.8913 4.18695 0.210915
US.WRAK.BHZ.00 2021-03-20T09:19:28.55 10.0 positive automatic P 41 56.8359 4.38602 0.211301
GE.MNAI.BHZ. 2021-03-20T09:19:13.42 10.0 positive automatic P 229 55.7068 -2.7234 0.306935
AT.SKAG.BHZ. 2021-03-20T09:19:09.48 10.0 positive automatic P 38 54.3561 3.08108 0.500783
GE.GSI.BHZ. 2021-03-20T09:19:08.32 10.0 positive automatic P 238 54.704 -0.595471 0.490562
GE.SMRI.BHZ. 2021-03-20T09:19:02.22 10.0 positive automatic P 219 53.8661 -0.621572 0.232495
GE.BKNI.BHZ. 2021-03-20T09:18:57.82 10.0 positive automatic P 234 53.1858 -0.0227787 0.49118
GE.JAGI.BHZ. 2021-03-20T09:18:56.37 10.0 positive automatic P 215 53.3634 -2.7951 0.236183
GE.LHMI.BHZ. 2021-03-20T09:18:52.12 10.0 positive automatic P 242 52.2606 1.11515 0.505413
AU.MTN.BHZ.00 2021-03-20T09:18:48.45 10.0 positive automatic P 193 52.1479 -1.74346 0.52506
AU.KDU.BHZ.00 2021-03-20T09:18:45.70 10.0 positive automatic P 191 51.7724 -1.6866 0.531111
IN.PBA.HHZ. 2021-03-20T09:18:43.69 10.0 positive automatic P 252 50.8958 2.84809 0.551866
IU.HNR.BHZ.00 2021-03-20T09:18:40.42 10.0 negative automatic P 156 50.7916 0.363265 0
GE.SOEI.BHZ. 2021-03-20T09:18:38.12 10.0 positive automatic P 202 50.7747 -1.9738 0.516949
MY.IPM.BHZ. 2021-03-20T09:18:32.47 10.0 positive automatic P 238 50.0409 -1.95509 0.566124
MY.KUM.BHZ. 2021-03-20T09:18:31.87 10.0 positive automatic P 239 49.6895 0.136776 0.58599
IU.COLA.BHZ.00 2021-03-20T09:18:17.17 10.0 positive automatic P 33 47.7023 0.657323 0.541582
IU.TARA.BHZ.00 2021-03-20T09:18:11.07 10.0 negative automatic P 135 46.8362 1.3161 0.286703
IO.EVN.BHZ. 2021-03-20T09:18:07.30 10.0 positive automatic P 274 46.3316 0.632914 0.630094
GE.BKB.BHZ. 2021-03-20T09:18:00.57 10.0 positive automatic P 216 45.5585 0.831694 0.600934
MY.SBM.BHZ. 2021-03-20T09:17:53.32 10.0 positive automatic P 224 44.8381 -0.736685 0.641541
GE.BNDI.BHZ. 2021-03-20T09:17:48.32 10.0 positive automatic P 197 44.2463 -0.987566 0.637216
IU.MAKZ.BHZ.00 2021-03-20T09:17:44.47 10.0 positive automatic P 301 43.6055 0.198087 0.695858
IN.SHL.HHZ. 2021-03-20T09:17:43.15 10.0 positive automatic P 268 43.5268 -0.387375 0.680736
GE.LUWI.BHZ. 2021-03-20T09:17:37.12 10.0 positive automatic P 208 43.0608 -2.66122 0.643384
GE.SANI.BHZ. 2021-03-20T09:17:36.52 10.0 positive automatic P 203 42.9146 -2.08607 0.645913
GE.FAKI.BHZ. 2021-03-20T09:17:31.37 10.0 positive automatic P 194 42.1903 -1.38647 0.65852
IU.CHTO.BHZ.00 2021-03-20T09:17:29.02 10.0 positive automatic P 254 41.7483 -0.180464 0.722465
GE.GENI.BHZ. 2021-03-20T09:17:22.92 10.0 positive automatic P 182 40.992 -0.0215671 0.69509
GE.TNTI.BHZ. 2021-03-20T09:17:12.37 10.0 positive automatic P 203 39.8073 -0.787417 0.750915
MY.KKM.BHZ. 2021-03-20T09:17:12.07 10.0 positive automatic P 222 39.6685 -0.070067 0.659402
RM.DLV.BHZ. 2021-03-20T09:17:11.82 10.0 positive automatic P 237 39.555 0.557767 0.774235
AK.TNA.BHZ. 2021-03-20T09:17:11.27 10.0 positive automatic P 30 39.5002 0.65606 0.709561
MY.LDM.BHZ. 2021-03-20T09:17:09.72 10.0 positive automatic P 218 39.2656 1.0415 0.726814
AK.GAMB.BHZ. 2021-03-20T09:16:53.73 10.0 positive automatic P 32 37.3908 0.819154 0.414987
RM.SLV.BHZ. 2021-03-20T09:16:44.52 10.0 positive automatic P 253 36.5117 -1.0414 0.376603
IU.MIDW.BHZ.00 2021-03-20T09:16:39.07 10.0 positive automatic P 94 35.4575 2.61955 0.857774
IU.TIXI.BHZ.00 2021-03-20T09:16:20.87 10.0 negative automatic P 353 33.8807 -1.9816 0.830309
IU.WAKE.BHZ.00 2021-03-20T09:15:40.37 10.0 negative automatic P 124 28.9195 1.10697 0.610687
AT.SMY.BHZ. 2021-03-20T09:15:29.24 10.0 positive automatic sP 47 26.5694 -5.14191 0
IU.ULN.BHZ.00 2021-03-20T09:15:17.77 10.0 positive automatic P 302 26.6623 -1.62204 0.816327
IU.GUMO.BHZ.00 2021-03-20T09:15:03.30 10.0 negative automatic P 172 24.9598 -0.448966 0.43956
IU.YAK.BHZ.00 2021-03-20T09:14:58.82 10.0 positive automatic P 347 24.7553 -3.06286 0.833333
IU.MA2.BHZ.00 2021-03-20T09:14:32.92 10.0 positive automatic P 12 21.9866 -2.16405 0.888889
IU.TATO.BHZ.00 2021-03-20T09:14:28.62 10.0 positive automatic P 238 21.6404 -2.75003 0.43956
JP.YOJ.BHZ. 2021-03-20T09:14:20.15 10.0 positive automatic P 234 21.0136 -4.48448 0.43956
IU.PET.BHZ.00 2021-03-20T09:14:00.82 10.0 positive automatic P 33 18.7786 0.422419 0.909091
JP.JOW.BHZ. 2021-03-20T09:13:25.75 10.0 positive automatic P 228 16.0602 -2.49778 0.43956
JP.JMZ.BHZ. 2021-03-20T09:13:18.05 10.0 positive automatic P 218 15.2997 -0.524893 0.615385
IU.INCN.BHZ.00 2021-03-20T09:12:35.92 10.0 positive automatic P 270 11.8234 3.56436 0.769231
JP.JSU.BHZ. 2021-03-20T09:12:27.75 10.0 positive automatic P 236 11.4092 0.982043 0.43956
JP.JCJ.BHZ. 2021-03-20T09:12:21.50 10.0 negative automatic P 177 11.295 -3.67067 0.952381
JP.JTU.BHZ. 2021-03-20T09:12:17.35 10.0 positive automatic P 252 10.5243 2.7072 0.888889
IU.YSS.BHZ.00 2021-03-20T09:11:44.80 10.0 positive automatic P 5 8.6212 -3.86809 0.851064
JP.JMN.BHZ. 2021-03-20T09:11:38.00 10.0 negative automatic P 236 7.7711 0.883532 0.952381
JP.JKA.BHZ. 2021-03-20T09:11:06.45 10.0 positive automatic S 15 2.8456 4.07061 0
JP.JHJ2.BHZ. 2021-03-20T09:11:04.25 10.0 negative automatic P 196 5.4574 -1.14354 0.952381
G.INU.BHZ.00 2021-03-20T09:10:57.41 10.0 positive automatic P 232 4.7401 1.81468 0.869565
JP.JSG.BHZ. 2021-03-20T09:10:56.30 10.0 positive automatic P 217 4.6024 2.59161 0.888889
JP.JGF.BHZ. 2021-03-20T09:10:52.60 10.0 negative automatic P 232 4.3737 1.93551 0.952381
IU.MAJO.BHZ.00 2021-03-20T09:10:36.22 10.0 negative automatic P 237 3.2517 0.906383 0.952381
JP.JTM.BHZ. 2021-03-20T09:10:21.80 10.0 negative automatic P 351 2.4427 -2.45401 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