Earthquake with magnitude of Mwp 6.0 on date 03-08-2021 and time 22:33:34 (Italy) in region Off east coast of Honshu, Japan [Sea: Japan]

A magnitude Mwp 6.0 earthquake occured in region: Off east coast of Honshu, Japan [Sea: Japan], on

  • 03-08-2021 20:33:34 (UTC)
  • 03-08-2021 22:33:34 (UTC +02:00) Italian time
  • 04-08-2021 05:33:34 (UTC +09:00) local time in the region of the earthquake (Asia/Tokyo)

and geographic coordinates (lat, lon) 36.109, 142.027 at 10 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 6.0

Mwpd 6.2
2021-08-03
20:33:34
36.109 142.027 10 2021-08-03
20:54:04
Sala Sismica INGV-Roma 93635321
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-08-03 20:33:34
Latitude 36.1090
Longitude 142.0270
Depth (km) 10 (from location)
Evaluation mode of Origin automatic
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV-A
Event type earthquake
Origin ID 93635321

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 8387
Semi-minor axis of confidence ellipse (meter) 1618
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 299
Circular confidence region, given by single value of horizontal uncertainty (meter) 6859.8
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 109.401
Number of associated phases, regardless of their use for origin computation 54
Number of defining phases 54
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 1.86913
Epicentral distance of station closest to the epicenter (degree) 3.11027
Epicentral distance of station farthest from the epicenter (degree) 61.41489
Number of stations at which the event was observed 45
Number of stations from which data was used for origin computation 45
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 93635321
Agency INGV
Autore early-est_ee1.1.9
Time of creation (UTC) 2021-08-03 20:54:04

Mwp:6

Field Value
Value 6
Uncertainty 0.2
Num. used stations 24
Type of magnitude Mwp
Reference to an origin 93635321
Agency INGV
Autore early-est_ee1.1.9
Time of creation (UTC) 2021-08-03 20:54:04

mb:5.4

Field Value
Value 5.4
Uncertainty 0.1
Num. used stations 24
Type of magnitude mb
Reference to an origin 93635321
Agency INGV
Autore early-est_ee1.1.9
Time of creation (UTC) 2021-08-03 20:54:04
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
GE.KBS.BHZ.00 2021-08-03T20:43:52.52 10.0 positive automatic P 350 61.4149 2.1607 0.373527
IU.MBWA.BHZ.00 2021-08-03T20:43:46.85 10.0 negative automatic P 204 61.0252 -0.894017 0.383089
G.SANVU.BHZ.00 2021-08-03T20:43:18.85 10.0 negative automatic P 151 56.7832 0.605797 0.409826
II.SIMI.BHZ.00 2021-08-03T20:43:16.57 10.0 positive automatic P 296 56.4699 0.559268 0.234471
II.WRAB.BHZ.00 2021-08-03T20:43:14.95 10.0 positive automatic P 189 56.5078 -1.39765 0
CN.INK.BHZ. 2021-08-03T20:43:06.58 10.0 negative automatic P 27 54.7944 2.59492 0
GE.GSI.BHZ. 2021-08-03T20:42:56.47 10.0 positive automatic P 240 53.8424 -0.582113 0.470509
II.AAK.BHZ.00 2021-08-03T20:42:38.47 10.0 positive automatic P 299 51.2192 0.5907 0.546519
GE.JAGI.BHZ. 2021-08-03T20:42:39.12 10.0 positive automatic P 216 51.7134 -2.2035 0
AU.KDU.BHZ.00 2021-08-03T20:42:30.00 10.0 positive automatic pP 192 49.621 4.48937 0
AU.MTN.BHZ.00 2021-08-03T20:42:27.78 10.0 positive automatic P 194 50.0202 -0.792749 0
IU.COLA.BHZ.00 2021-08-03T20:42:27.15 10.0 positive automatic P 32 49.4367 3.00844 0.53789
RM.DLV.BHZ. 2021-08-03T20:42:25.07 10.0 negative automatic PP 240 38.6655 -1.30457 0
AU.KDU.BHZ.00 2021-08-03T20:42:24.83 10.0 positive automatic P 192 49.621 -0.685633 0.573193
GE.MMRI.BHZ. 2021-08-03T20:42:15.62 10.0 positive automatic P 207 48.4627 -1.02876 0.469865
II.KDAK.BHZ.00 2021-08-03T20:42:10.10 10.0 positive automatic P 41 47.3138 2.34816 0.620205
II.KURK.BHZ.00 2021-08-03T20:42:03.12 10.0 positive automatic P 309 46.7517 -0.247345 0.615352
AT.TTA.BHZ. 2021-08-03T20:41:59.16 10.0 negative automatic P 34 45.7644 3.41892 0.600167
II.KAPI.BHZ.00 2021-08-03T20:41:58.20 10.0 positive automatic P 212 46.111 -0.156041 0.619262
IU.MAKZ.BHZ.00 2021-08-03T20:41:50.52 10.0 positive automatic P 303 45.1104 0.032226 0.644234
IN.SHL.HHZ. 2021-08-03T20:41:38.50 10.0 positive automatic P 271 43.8511 -1.8153 0.69463
MY.SBM.BHZ. 2021-08-03T20:41:36.52 10.0 positive automatic P 226 43.4831 -0.875332 0.665694
IU.CHTO.BHZ.00 2021-08-03T20:41:20.00 10.0 positive automatic P 257 41.5296 -0.540989 0.65556
GE.SANI.BHZ. 2021-08-03T20:41:15.22 10.0 positive automatic P 205 40.9836 -1.76048 0.611814
GE.FAKI.BHZ. 2021-08-03T20:41:08.57 10.0 positive automatic P 195 40.081 -0.966799 0.481795
GE.TNTI.BHZ. 2021-08-03T20:40:50.52 10.0 positive automatic P 204 37.863 -0.423252 0.736373
MY.LDM.BHZ. 2021-08-03T20:40:50.42 10.0 positive automatic P 221 37.7296 0.580268 0.810923
RM.SLV.BHZ. 2021-08-03T20:40:36.87 10.0 positive automatic P 256 36.2543 -0.499895 0.783842
II.TLY.BHZ.00 2021-08-03T20:39:52.67 10.0 positive automatic P 312 31.2353 -1.04885 0.670377
IU.ULN.BHZ.00 2021-08-03T20:39:26.12 10.0 positive automatic P 306 28.2178 -1.04294 0.909091
IU.YAK.BHZ.00 2021-08-03T20:39:15.57 10.0 positive automatic P 347 27.0467 -0.846192 0.952381
IU.PET.BHZ.00 2021-08-03T20:38:14.12 10.0 positive automatic P 29 20.5383 1.60231 0.615385
JP.YOJ.BHZ. 2021-08-03T20:38:03.65 10.0 negative automatic P 240 20.0647 -3.70504 0.952381
JP.JOW.BHZ. 2021-08-03T20:37:09.55 10.0 negative automatic P 235 14.9252 4.55525 0.909091
JP.JSU.BHZ. 2021-08-03T20:36:07.80 10.0 positive automatic P 248 10.6498 1.1815 0.851064
IU.YSS.BHZ.00 2021-08-03T20:36:06.85 10.0 positive automatic P 3 10.863 -2.64621 0.8
JP.JTU.BHZ. 2021-08-03T20:36:04.40 10.0 positive automatic P 265 10.4183 1.00866 0.97561
JP.JCJ.BHZ. 2021-08-03T20:35:42.85 10.0 positive automatic P 179 9.0139 -1.31241 0.888889
JP.JMN.BHZ. 2021-08-03T20:35:18.40 10.0 positive automatic P 253 7.0902 0.56563 0.930233
II.ERM.BHZ.00 2021-08-03T20:35:00.52 10.0 positive automatic P 8 5.9704 -1.84695 0.97561
JP.JTM.BHZ. 2021-08-03T20:34:44.15 10.0 positive automatic P 351 4.7405 -1.33101 0.909091
G.INU.BHZ.00 2021-08-03T20:34:37.46 10.0 positive automatic P 261 4.1269 0.414153 0.930233
JP.JGF.BHZ. 2021-08-03T20:34:33.70 10.0 positive automatic P 264 3.8201 0.79119 0.888889
JP.JSG.BHZ. 2021-08-03T20:34:28.45 10.0 positive automatic P 247 3.4444 0.790238 0.43956
JP.JHJ2.BHZ. 2021-08-03T20:34:28.95 10.0 positive automatic P 212 3.5038 0.482347 0.909091
IU.MAJO.BHZ.00 2021-08-03T20:34:22.32 10.0 positive automatic P 279 3.1103 -0.795042 0.97561
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