Earthquake with magnitude of Mwp 6.0 on date 03-08-2021 and time 20:33:34 (UTC) 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 updated as more data become available. See http://shakemap.ingv.it for additional information. The black star indicates the epicenter. The triangles show the accelerometric and velocimetric stations used in the calculation, colored according to the recorded shaking.

Intensity Shakemap

Intensity Shakemap

This map shows the distribution of instrumental intensities. The intensity is derived through an empirical law that correlates the recorded values of actual ground shaking, e.g., acceleration and velocity, with the macroseismic intensity for Italian earthquakes, as reported in the Italian Macroseismic Database (DBMI15, https://doi.org/10.13127/cpti/cpti15.3).
Peak ground acceleration Shakemap

Peak ground acceleration Shakemap

This map shows the distribution of peak ground acceleration expressed as percent 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 earthquake resentment in the area, expressed in terms of intensity on the MCS scale (Mercalli-Cancani-Sieberg). Intensities are determined using data from questionnaires collected on the website http://www.hsit.it. The intensities shown are determined considering all the reports received from each municipality, and are all the more reliable the greater the number of questionnaires. The collected data are subjected to an automatic statistical filter, but are not checked individually. In particular, intensities greater than or equal to the VI degree of the MCS or EMS scale require on-site verification by specialized personnel. The black star is the epicenter of the earthquake that occurred. This map is updated every time citizens fill out new questionnaires. The number of questionnaires processed to obtain this map, the date and time of the last update are shown at the top right.
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

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

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

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 2021-08-03T20:43:14.80 10.0 positive automatic P 189 56.5078 -1.54765 0.441749
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
IU.COLA.BHZ.00 2021-08-03T20:42:27.15 10.0 positive automatic P 32 49.4367 3.00844 0.53789
AU.MTN.BHZ.00 2021-08-03T20:42:27.78 10.0 positive automatic P 194 50.0202 -0.792749 0
RM.DLV.BHZ. 2021-08-03T20:42:25.07 10.0 negative automatic PP 240 38.6655 -1.30457 0
AU.KDU.BHZ.00 2021-08-03T20:42:24.93 10.0 positive automatic P 192 49.621 -0.585633 0.587173
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