Earthquake with magnitude of Mwp 6.4 on date 29-11-2021 and time 12:40:46 (UTC) in region Southeast of Honshu, Japan [Sea: Japan]
A magnitude Mwp 6.4 earthquake occured in region: Southeast of Honshu, Japan [Sea: Japan], on
- 29-11-2021 12:40:46 (UTC)
- 29-11-2021 13:40:46 (UTC +01:00) Italian time
- 29-11-2021 21:40:46 (UTC +09:00) local time in the region of the earthquake (Asia/Tokyo)
and geographic coordinates (lat, lon) 31.257, 142.762 at 35 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.
Display location by
GeoHack
GoogleMap
OpenStreetMap
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
Not available maps for this sismic event.
Seismic hazard
Not available maps for this sismic event.
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
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
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
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
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 5.8
Mwp 6.4 |
2021-11-29 12:40:46 |
31.2574 | 142.762 | 35 | 2021-11-29 12:55:36 |
Sala Sismica INGV-Roma | 97940281 |
Preferred location and magnitude until now.
Origin information
Origin
| Field | Value |
|---|---|
| Time (UTC) | 2021-11-29 12:40:46 |
| Latitude | 31.2574 |
| Longitude | 142.7620 |
| Depth (km) | 35 (from location) |
| Evaluation mode of Origin | automatic |
| Evaluation status of Origin | reviewed |
| Version | 100 -> SURVEY-INGV-A |
| Event type | earthquake |
| Origin ID | 97940281 |
Uncertainty
| Field | Value |
|---|---|
| Preferred uncertainty description | uncertainty ellipse |
| Semi-major axis of confidence ellipse (meter) | 5738 |
| Semi-minor axis of confidence ellipse (meter) | 4096 |
| Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) | 103 |
| Circular confidence region, given by single value of horizontal uncertainty (meter) | 5414.1 |
| Confidence level of the uncertainty (%) | 68 |
Quality
| Field | Value |
|---|---|
| Largest azimuthal gap in station distribution as seen from epicenter (degree) | 171.709 |
| Number of associated phases, regardless of their use for origin computation | 17 |
| Number of defining phases | 17 |
| RMS of the travel time residuals of the arrivals used for the origin computation (sec) | 1.14092 |
| Epicentral distance of station closest to the epicenter (degree) | 3.11068 |
| Epicentral distance of station farthest from the epicenter (degree) | 19.74023 |
| Number of stations at which the event was observed | 17 |
| Number of stations from which data was used for origin computation | 17 |
Magnitudes information
Mwp:6.4
| Field | Value |
|---|---|
| Value | 6.4 |
| Uncertainty | 0.1 |
| Num. used stations | 15 |
| Type of magnitude | Mwp |
| Reference to an origin | 97940281 |
| Agency | INGV |
| Autore | early-est_ee1.1.9 |
| Time of creation (UTC) | 2021-11-29 12:55:36 |
mb:5.8
| Field | Value |
|---|---|
| Value | 5.8 |
| Uncertainty | 0.1 |
| Num. used stations | 14 |
| Type of magnitude | mb |
| Reference to an origin | 97940281 |
| Agency | INGV |
| Autore | early-est_ee1.1.9 |
| Time of creation (UTC) | 2021-11-29 12:55:36 |
Picking and Arrival
| SCNL | Time | Uncertainty | Polarity | Evaluation_mode | Phase | Azimuth | Distance | Takeoff_angle | Residual | Weight |
|---|---|---|---|---|---|---|---|---|---|---|
| IU.TATO.BHZ.00 | 2021-11-29T12:45:11.42 | 10.0 | negative | automatic | P | 257 | 19.7402 | -1.19845 | 0.869565 | |
| JP.YOJ.BHZ. | 2021-11-29T12:44:59.65 | 10.0 | negative | automatic | P | 254 | 18.699 | -1.55091 | 0.930233 | |
| IU.GUMO.BHZ.00 | 2021-11-29T12:44:51.32 | 10.0 | positive | automatic | P | 173 | 17.773 | 0.793855 | 0.987654 | |
| IU.YSS.BHZ.00 | 2021-11-29T12:44:24.60 | 10.0 | negative | automatic | P | 360 | 15.7006 | 0.156005 | 0.952381 | |
| IU.INCN.BHZ.00 | 2021-11-29T12:44:12.37 | 10.0 | negative | automatic | P | 299 | 14.6739 | 1.40361 | 0.615385 | |
| JP.JOW.BHZ. | 2021-11-29T12:43:52.10 | 10.0 | positive | automatic | P | 254 | 13.403 | -1.5878 | 0.43956 | |
| JP.JTU.BHZ. | 2021-11-29T12:43:29.75 | 10.0 | positive | automatic | P | 290 | 11.679 | -0.366975 | 0.43956 | |
| JP.JMZ.BHZ. | 2021-11-29T12:43:28.75 | 10.0 | positive | automatic | P | 245 | 11.4927 | 1.18786 | 0.952381 | |
| II.ERM.BHZ.00 | 2021-11-29T12:43:16.57 | 10.0 | positive | automatic | P | 2 | 10.7617 | -0.995658 | 0.952381 | |
| JP.JSU.BHZ. | 2021-11-29T12:43:14.80 | 10.0 | positive | automatic | P | 275 | 10.5058 | 0.678755 | 0.952381 | |
| JP.JTM.BHZ. | 2021-11-29T12:43:02.05 | 10.0 | positive | automatic | P | 352 | 9.6294 | -0.0223887 | 0.888889 | |
| JP.JMN.BHZ. | 2021-11-29T12:42:37.85 | 10.0 | positive | automatic | P | 291 | 7.889 | -0.438571 | 0.888889 | |
| IU.MAJO.BHZ.00 | 2021-11-29T12:42:19.62 | 10.0 | negative | automatic | P | 326 | 6.5 | 0.416385 | 0.97561 | |
| G.INU.BHZ.00 | 2021-11-29T12:42:17.26 | 10.0 | positive | automatic | P | 312 | 6.2991 | 0.866896 | 0.930233 | |
| JP.JGF.BHZ. | 2021-11-29T12:42:16.95 | 10.0 | positive | automatic | P | 315 | 6.2636 | 0.964545 | 0.952381 | |
| JP.JSG.BHZ. | 2021-11-29T12:42:01.20 | 10.0 | positive | automatic | P | 313 | 5.1424 | 0.692861 | 0.930233 | |
| JP.JHJ2.BHZ. | 2021-11-29T12:41:30.85 | 10.0 | negative | automatic | P | 307 | 3.1107 | -1.73023 | 0.952381 |
TDMT - Time Domain Moment Tensor
Not available TDMT solution for this seismic event.
Fault Plane solutions in the area
Not available maps for this sismic event.