Earthquake with magnitude of Mwp 6.1 on date 15-11-2021 and time 05:23:30 (Italy) in region South Indian Ocean [Sea]

A magnitude Mwp 6.1 earthquake occured in region: South Indian Ocean [Sea], on

  • 15-11-2021 04:23:30 (UTC)
  • 15-11-2021 05:23:30 (UTC +01:00) Italian time
  • 15-11-2021 08:23:30 (UTC +04:00) local time in the region of the earthquake (Indian/Reunion)

and geographic coordinates (lat, lon) -37.357, 51.231 at 1 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 5.2
Mwp 6.1

Mwpd 6.1
2021-11-15
04:23:30
-37.357 51.2314 1 2021-11-15
04:46:54
Sala Sismica INGV-Roma 97474071
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-11-15 04:23:30
Latitude -37.3570
Longitude 51.2314
Depth (km) 1 (from location)
Evaluation mode of Origin automatic
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV-A
Event type earthquake
Origin ID 97474071

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 16655
Semi-minor axis of confidence ellipse (meter) 14516
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 19
Circular confidence region, given by single value of horizontal uncertainty (meter) 13445
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 57.1364
Number of associated phases, regardless of their use for origin computation 60
Number of defining phases 60
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 1.57396
Epicentral distance of station closest to the epicenter (degree) 9.08532
Epicentral distance of station farthest from the epicenter (degree) 93.38108
Number of stations at which the event was observed 58
Number of stations from which data was used for origin computation 58
Magnitudes information

Mwpd:6.1

Field Value
Value 6.1
Uncertainty 0.1
Num. used stations 34
Type of magnitude Mwpd
Reference to an origin 97474071
Agency INGV
Autore early-est_ee1.1.9
Time of creation (UTC) 2021-11-15 04:46:54

Mwp:6.1

Field Value
Value 6.1
Uncertainty 0.1
Num. used stations 36
Type of magnitude Mwp
Reference to an origin 97474071
Agency INGV
Autore early-est_ee1.1.9
Time of creation (UTC) 2021-11-15 04:46:54

mb:5.2

Field Value
Value 5.2
Uncertainty 0.1
Num. used stations 53
Type of magnitude mb
Reference to an origin 97474071
Agency INGV
Autore early-est_ee1.1.9
Time of creation (UTC) 2021-11-15 04:46:54
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
PL.KSP.BHZ. 2021-11-15T04:36:46.19 10.0 positive automatic P 339 93.3811 0.144214 0.0633474
IU.PAB.BHZ.00 2021-11-15T04:36:42.12 10.0 positive automatic P 320 92.2806 1.05465 0.0755551
OE.KBA.BHZ. 2021-11-15T04:36:35.12 10.0 positive automatic P 335 90.9773 -0.0425272 0
II.KURK.BHZ.00 2021-11-15T04:36:34.70 10.0 negative automatic P 17 91.3013 -1.70424 0.0844134
IV.PTCC.BHZ. 2021-11-15T04:36:32.65 10.0 positive automatic P 335 90.3886 0.397155 0.085374
C1.BO02.BHZ. 2021-11-15T04:36:31.37 10.0 positive automatic P 224 89.9849 0.976209 0.0920248
GE.PSZ.BHZ. 2021-11-15T04:36:28.55 10.0 positive automatic P 340 89.7294 -0.665341 0.0876281
HU.KOVH.BHZ. 2021-11-15T04:36:22.60 10.0 negative automatic P 338 88.5909 -1.15854 0.0780021
IU.MAKZ.BHZ.00 2021-11-15T04:36:21.40 10.0 negative automatic P 20 88.5523 -2.23103 0.0736098
IV.MGAB.BHZ. 2021-11-15T04:36:20.95 10.0 negative automatic P 332 87.789 0.942686 0.107297
C.GO06.BHZ. 2021-11-15T04:36:16.73 10.0 positive automatic P 221 86.8053 1.36348 0.093796
MN.BZS.BHZ. 2021-11-15T04:36:15.57 10.0 negative automatic P 340 87.1431 -1.26779 0.102479
GT.PLCA.BHZ.00 2021-11-15T04:36:11.08 10.0 positive automatic P 220 85.4821 2.28187 0.123171
GE.TIRR.BHZ. 2021-11-15T04:36:01.23 10.0 negative automatic P 344 84.3743 -1.82958 0.0630226
G.COYC.BHZ.00 2021-11-15T04:35:57.75 10.0 negative automatic P 216 82.6573 3.4992 0.137933
II.AAK.BHZ.00 2021-11-15T04:35:54.57 10.0 positive automatic P 17 82.7461 -0.384298 0.134311
IU.CTAO.BHZ.00 2021-11-15T04:35:50.75 10.0 positive automatic P 109 81.7722 1.10699 0.15162
HL.RDO.HHZ. 2021-11-15T04:35:49.22 10.0 negative automatic P 341 81.9405 -1.25836 0.153688
HT.LIT.HHZ. 2021-11-15T04:35:48.46 10.0 negative automatic P 338 81.8209 -1.46729 0.0546235
HT.AGG.HHZ. 2021-11-15T04:35:43.32 10.0 positive automatic P 338 80.869 -1.56635 0.15584
KO.DKL.BHZ. 2021-11-15T04:35:37.82 10.0 positive automatic P 341 79.6342 -0.308349 0.173461
II.SIMI.BHZ.00 2021-11-15T04:35:27.20 10.0 negative automatic P 14 77.7495 -0.54727 0.185571
RM.SLV.BHZ. 2021-11-15T04:35:22.52 10.0 negative automatic P 50 76.8 -0.00425025 0.196752
HL.ARG.HHZ. 2021-11-15T04:35:21.14 10.0 negative automatic P 341 76.6189 -0.278315 0
KO.ELL.BHZ. 2021-11-15T04:35:21.54 10.0 negative automatic P 343 76.6836 -0.433517 0.184464
GE.SANI.BHZ. 2021-11-15T04:35:21.72 10.0 negative automatic P 82 76.6669 0.0480178 0.212532
GE.KARP.BHZ. 2021-11-15T04:35:19.05 10.0 negative automatic P 340 76.2437 -0.309601 0.0977508
AU.KDU.BHZ.00 2021-11-15T04:35:14.90 10.0 negative automatic P 95 75.4395 0.222154 0.101599
AU.MTN.BHZ.00 2021-11-15T04:35:08.98 10.0 negative automatic P 94 74.2866 0.953694 0
GE.CSS.BHZ. 2021-11-15T04:35:06.75 10.0 negative automatic P 345 74.2016 -0.823214 0.222673
IO.EVN.BHZ. 2021-11-15T04:35:02.20 10.0 negative automatic P 32 73.346 -1.14072 0
II.WRAB.BHZ.00 2021-11-15T04:34:59.90 10.0 negative automatic P 102 72.763 0.804433 0.252035
GE.SALP.BHZ. 2021-11-15T04:34:48.17 10.0 negative automatic P 346 71.0192 -0.466333 0.245449
GE.EIL.BHZ. 2021-11-15T04:34:33.80 10.0 negative automatic P 345 68.7368 -0.745015 0.264396
GT.DBIC.BHZ.00 2021-11-15T04:34:32.50 10.0 positive automatic P 297 68.2819 0.814027 0.305048
MY.SBM.BHZ. 2021-11-15T04:34:31.37 10.0 negative automatic P 69 68.9429 -4.46369 0.293376
AU.FITZ.BHZ. 2021-11-15T04:34:24.05 10.0 negative automatic P 96 66.9421 0.828351 0.314306
AU.WRKA.BHZ.00 2021-11-15T04:34:13.95 10.0 negative automatic P 104 65.2882 1.27147 0.316582
GE.JAGI.BHZ. 2021-11-15T04:34:00.37 10.0 negative automatic P 80 63.4284 -0.0452235 0.282946
AU.FORT.BHZ.00 2021-11-15T04:33:53.55 10.0 positive automatic P 109 62.2139 1.22962 0.371467
MY.IPM.BHZ. 2021-11-15T04:33:53.97 10.0 negative automatic P 59 62.3415 0.780647 0.37856
II.RAYN.BHZ.00 2021-11-15T04:33:44.60 10.0 negative automatic P 354 61.1152 -0.396981 0.33564
IU.MBWA.BHZ.00 2021-11-15T04:33:42.30 10.0 positive automatic P 95 60.6104 0.811778 0.380067
IU.SBA.BHZ.00 2021-11-15T04:33:30.07 10.0 positive automatic P 167 58.592 2.53749 0.41688
GT.VNDA.BHZ.00 2021-11-15T04:33:22.68 10.0 positive automatic P 166 57.8617 0.242848 0.0448954
AU.MORW.BHZ. 2021-11-15T04:32:55.12 10.0 positive automatic P 101 53.804 1.7592 0.498864
AU.MAW.BHZ. 2021-11-15T04:29:47.28 10.0 positive automatic P 171 30.9466 -0.299789 0.954804
IU.TSUM.BHZ.00 2021-11-15T04:30:18.32 10.0 negative automatic P 292 34.4652 -0.267472 0.800645
GE.WIN.BHZ. 2021-11-15T04:30:04.50 10.0 negative automatic P 287 32.8176 0.181014 0.797297
II.SUR.BHZ.00 2021-11-15T04:28:58.12 10.0 positive automatic P 272 25.3341 0.416127 0.952381
AF.ALKP.BHZ. 2021-11-15T04:28:55.75 10.0 negative automatic P 279 25.1263 0.0507764 0.869565
GT.LBTB.BHZ.00 2021-11-15T04:28:54.08 10.0 positive automatic P 292 25.042 -0.867321 0.963855
GE.SBV.BHZ. 2021-11-15T04:28:46.25 10.0 positive automatic P 357 23.9261 1.66958 0.909091
GT.BOSA.BHZ.00 2021-11-15T04:28:39.40 10.0 negative automatic P 284 23.3797 -0.107753 0.909091
AF.GRHM.BHZ. 2021-11-15T04:28:10.92 10.0 negative automatic P 274 20.6228 1.00356 0.888889
G.RER.BHZ.00 2021-11-15T04:27:22.85 10.0 positive automatic P 15 16.65 -0.952147 0.888889
GE.VOI.BHZ. 2021-11-15T04:27:13.45 10.0 positive automatic P 345 15.9185 -1.02338 0.43956
G.CRZF.BHZ.00 2021-11-15T04:25:36.10 10.0 positive automatic P 177 9.0853 -5.24039 0.43956
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