Earthquake with magnitude of Mwp 6.7 on date 16-08-2021 and time 11:10:37 (UTC) in region South Georgia & the South Sandwich Is. [Sea]

A magnitude Mwp 6.7 earthquake occured in region: South Georgia & the South Sandwich Is. [Sea], on

  • 16-08-2021 11:10:37 (UTC)
  • 16-08-2021 13:10:37 (UTC +02:00) Italian time
  • 16-08-2021 09:10:37 (UTC -02:00) local time in the region of the earthquake (Atlantic/South_Georgia)

and geographic coordinates (lat, lon) -58.268, -23.346 at 9 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 5.7
Mwp 6.7

Mwpd 6.8
2021-08-16
11:10:37
-58.268 -23.3464 9 2021-08-16
11:29:01
Sala Sismica INGV-Roma 94251541
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-08-16 11:10:37
Latitude -58.2680
Longitude -23.3464
Depth (km) 9 (from location)
Evaluation mode of Origin automatic
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV-A
Event type earthquake
Origin ID 94251541

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 17215
Semi-minor axis of confidence ellipse (meter) 6650
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 195
Circular confidence region, given by single value of horizontal uncertainty (meter) 13911.7
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 44.6273
Number of associated phases, regardless of their use for origin computation 94
Number of defining phases 94
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 1.60626
Epicentral distance of station closest to the epicenter (degree) 8.2931
Epicentral distance of station farthest from the epicenter (degree) 112.63304
Number of stations at which the event was observed 94
Number of stations from which data was used for origin computation 94
Magnitudes information

Mwp:6.7

Field Value
Value 6.7
Uncertainty 0.1
Num. used stations 53
Type of magnitude Mwp
Reference to an origin 94251541
Agency INGV
Autore early-est_ee1.1.9
Time of creation (UTC) 2021-08-16 11:29:01

Mwpd:6.8

Field Value
Value 6.8
Uncertainty 0.1
Num. used stations 56
Type of magnitude Mwpd
Reference to an origin 94251541
Agency INGV
Autore early-est_ee1.1.9
Time of creation (UTC) 2021-08-16 11:29:01

mb:5.7

Field Value
Value 5.7
Uncertainty 0.1
Num. used stations 72
Type of magnitude mb
Reference to an origin 94251541
Agency INGV
Autore early-est_ee1.1.9
Time of creation (UTC) 2021-08-16 11:29:01
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
G.CRZF.BHZ.00 2021-08-16T11:25:33.90 10.0 positive automatic S 109 44.8585 6.76782 0
US.MNTX.BHZ.00 2021-08-16T11:25:21.15 10.0 positive automatic Pdiff 294 112.633 3.34857 0
GE.PSZ.BHZ. 2021-08-16T11:25:14.20 10.0 negative automatic Pdiff 30 111.9861 -0.823229 0
IM.TKL.BHZ. 2021-08-16T11:24:53.39 10.0 positive automatic Pdiff 313 106.5483 2.65338 0
KO.DKL.BHZ. 2021-08-16T11:24:35.86 10.0 negative automatic Pdiff 38 105.9563 -12.1905 0
MN.TIP.BHZ. 2021-08-16T11:24:34.27 10.0 negative automatic Pdiff 31 103.0265 -0.889776 0
IU.CTAO.BHZ.00 2021-08-16T11:24:27.15 10.0 positive automatic Pdiff 170 101.1655 0.333914 0
MN.VSL.BHZ. 2021-08-16T11:24:26.82 10.0 negative automatic Pdiff 25 101.5035 -1.49762 0
GE.EIL.BHZ. 2021-08-16T11:24:23.40 10.0 negative automatic Pdiff 49 100.4156 -0.0493079 0
II.RAYN.BHZ.00 2021-08-16T11:24:19.90 10.0 negative automatic P 60 99.5188 0.356682 0.0299157
IU.PAB.BHZ.00 2021-08-16T11:24:16.27 10.0 negative automatic P 15 99.0876 -1.40394 0.0194752
PM.PESTR.BHZ. 2021-08-16T11:24:12.40 10.0 negative automatic P 12 98.0202 -0.401659 0.0217982
LX.MORF.BHZ. 2021-08-16T11:24:05.32 10.0 negative automatic P 12 96.3563 0.0157249 0.0449406
PM.PVAQ.BHZ. 2021-08-16T11:24:05.63 10.0 negative automatic P 12 96.5575 -0.530204 0.0352712
AU.EIDS.BHZ. 2021-08-16T11:24:03.97 10.0 negative automatic P 175 96.2293 -0.698532 0.0569894
IU.MBWA.BHZ.00 2021-08-16T11:23:58.15 10.0 negative automatic P 146 94.8788 -0.357413 0.0614903
AU.QLP.BHZ. 2021-08-16T11:23:57.07 10.0 positive automatic P 169 94.5113 0.246051 0.0649979
IU.TEIG.BHZ.00 2021-08-16T11:23:57.35 10.0 negative automatic P 301 94.868 -1.08187 0.0588435
AU.WRKA.BHZ.00 2021-08-16T11:23:51.25 10.0 negative automatic P 154 93.4009 -0.537602 0.0697858
G.PPTF.BHZ.00 2021-08-16T11:23:50.50 10.0 positive automatic P 230 92.2433 4.03476 0.0724839
MX.CCIG.BHZ. 2021-08-16T11:23:49.89 10.0 positive automatic P 296 93.195 -1.12859 0.0671251
WM.AVE.BHZ. 2021-08-16T11:23:46.95 10.0 negative automatic P 13 92.5302 -0.7549 0
AU.GIRL.BHZ.00 2021-08-16T11:23:45.35 10.0 positive automatic P 141 91.7668 1.19183 0.0804942
AU.ARMA.BHZ. 2021-08-16T11:23:42.42 10.0 positive automatic P 176 91.2099 0.668287 0.0870519
AU.LHI.BHZ.00 2021-08-16T11:23:37.88 10.0 negative automatic P 182 90.1854 1.06629 0.0595364
CU.GTBY.BHZ.00 2021-08-16T11:23:30.65 10.0 negative automatic P 312 89.071 -0.947131 0.0232103
CU.TGUH.BHZ.00 2021-08-16T11:23:30.15 10.0 negative automatic P 299 88.984 -1.21773 0.095509
CU.GRTK.BHZ.00 2021-08-16T11:23:30.80 10.0 negative automatic P 316 89.0282 -0.584253 0.0465605
CU.MTDJ.BHZ.00 2021-08-16T11:23:28.75 10.0 negative automatic P 310 88.4895 -0.244823 0.0837867
AU.RIV.BHZ. 2021-08-16T11:23:26.72 10.0 negative automatic P 175 87.7836 1.21894 0.107336
AU.HTT.BHZ. 2021-08-16T11:23:22.57 10.0 positive automatic P 165 87.1019 0.242987 0.111026
GE.BOAB.BHZ. 2021-08-16T11:23:19.30 10.0 negative automatic P 300 86.8303 -1.65346 0.111734
CU.SDDR.BHZ.00 2021-08-16T11:23:18.18 10.0 negative automatic P 315 86.7563 -2.44749 0.0180954
G.CAN.BHZ.00 2021-08-16T11:23:18.45 10.0 positive automatic P 174 86.1898 0.594003 0.116448
AU.MORW.BHZ. 2021-08-16T11:23:17.42 10.0 positive automatic P 145 86.3123 -0.975327 0.107026
NZ.OUZ.HHZ.10 2021-08-16T11:23:14.00 10.0 positive automatic P 194 85.4356 -0.00156354 0.127334
AU.MILA.BHZ.00 2021-08-16T11:23:10.20 10.0 negative automatic P 174 84.467 0.934548 0.137422
II.JTS.BHZ.00 2021-08-16T11:23:09.27 10.0 negative automatic P 300 84.5945 -0.564738 0.128616
G.TAM.BHZ.00 2021-08-16T11:23:08.75 10.0 negative automatic P 27 84.5376 -0.980137 0.12906
G.HDC.BHZ.00 2021-08-16T11:23:06.80 10.0 negative automatic P 300 83.9551 0.0703851 0.122523
AU.TOO.BHZ.00 2021-08-16T11:23:05.85 10.0 negative automatic P 171 83.7025 0.508959 0.137241
IU.SJG.BHZ.00 2021-08-16T11:23:04.87 10.0 negative automatic P 320 84.1188 -2.56293 0.0639985
IU.NWAO.BHZ.00 2021-08-16T11:23:00.97 10.0 negative automatic P 148 83.0311 -0.872477 0.136473
CU.ANWB.BHZ.00 2021-08-16T11:22:56.37 10.0 positive automatic P 323 82.2734 -1.46966 0.154416
NZ.URZ.HHZ.10 2021-08-16T11:22:56.50 10.0 positive automatic P 196 81.963 0.282006 0.150691
IU.SNZO.BHZ.00 2021-08-16T11:22:43.60 10.0 positive automatic P 194 79.288 1.71327 0.186125
II.TAU.BHZ.00 2021-08-16T11:22:38.02 10.0 positive automatic P 173 78.5206 0.349172 0.176459
NZ.KHZ.HHZ.10 2021-08-16T11:22:36.99 10.0 positive automatic P 193 78.3349 0.353036 0.197451
CU.BBGH.BHZ.00 2021-08-16T11:22:35.65 10.0 positive automatic P 324 77.2972 4.77248 0.148192
IU.PAYG.BHZ.00 2021-08-16T11:22:34.42 10.0 positive automatic P 290 77.522 2.26946 0.181581
CU.GRGR.BHZ.00 2021-08-16T11:22:28.50 10.0 negative automatic P 322 77.0093 -0.765302 0.199263
NZ.ODZ.HHZ.10 2021-08-16T11:22:25.47 10.0 negative automatic P 190 76.0347 1.71042 0.208969
IU.PTCN.BHZ.00 2021-08-16T11:22:24.12 10.0 positive automatic P 243 77.1044 -5.67737 0
GE.KMBO.BHZ.00 2021-08-16T11:22:14.62 10.0 negative automatic P 65 74.0421 2.07784 0.0506151
IU.OTAV.BHZ.00 2021-08-16T11:22:04.47 10.0 negative automatic P 301 72.698 -0.416704 0.223189
II.MBAR.BHZ.00 2021-08-16T11:21:57.20 10.0 negative automatic P 59 71.489 -0.0829916 0.206795
II.ABPO.BHZ.00 2021-08-16T11:21:09.57 10.0 positive automatic P 84 63.7325 1.26051 0.314744
GE.VOI.BHZ. 2021-08-16T11:20:51.10 10.0 positive automatic P 85 61.1093 0.397384 0.386458
II.NNA.BHZ.00 2021-08-16T11:20:50.67 10.0 positive automatic P 296 61.1351 -0.108561 0.345885
GT.LPAZ.BHZ.00 2021-08-16T11:19:55.83 10.0 positive automatic P 303 53.3526 -0.673164 0.262235
G.PAF.BHZ.00 2021-08-16T11:19:46.00 10.0 positive automatic P 124 51.3857 4.92837 0.543858
IU.CASY.BHZ.00 2021-08-16T11:19:37.32 10.0 positive automatic P 158 50.7998 0.654499 0.52838
IU.TSUM.BHZ.00 2021-08-16T11:19:22.62 10.0 negative automatic P 55 49.0791 -1.18259 0.543635
GE.WIN.BHZ. 2021-08-16T11:18:58.50 10.0 positive automatic P 57 45.8852 -0.548166 0.582624
GT.BOSA.BHZ.00 2021-08-16T11:18:47.23 10.0 positive automatic P 70 44.5476 -1.11521 0.670145
GT.VNDA.BHZ.00 2021-08-16T11:18:46.08 10.0 negative automatic P 182 44.1744 0.92537 0.114796
II.SHEL.BHZ.00 2021-08-16T11:18:46.37 10.0 negative automatic P 25 44.2845 0.259687 0.636637
C.GO03.BHZ. 2021-08-16T11:18:46.85 10.0 positive automatic P 293 44.5579 -1.47653 0.631891
C1.VA04.BHZ. 2021-08-16T11:18:45.95 10.0 negative automatic P 279 44.001 2.18839 0.648952
IU.SBA.BHZ.00 2021-08-16T11:18:43.05 10.0 negative automatic P 183 43.7388 1.40255 0.403278
IU.LCO.BHZ.00 2021-08-16T11:18:39.67 10.0 positive automatic P 291 43.6053 -1.27934 0.679384
BL.PMNB.HHZ. 2021-08-16T11:18:37.96 10.0 positive automatic P 327 43.1847 0.634958 0.627388
C.GO04.BHZ. 2021-08-16T11:18:32.10 10.0 positive automatic P 290 42.6963 -1.46756 0.657087
AF.ALKP.BHZ. 2021-08-16T11:18:27.49 10.0 negative automatic P 68 41.9744 -0.0209746 0.662389
C1.CO02.BHZ. 2021-08-16T11:18:26.28 10.0 positive automatic P 289 41.9536 -1.0813 0.710095
AF.GRHM.BHZ. 2021-08-16T11:18:21.67 10.0 negative automatic P 75 41.3274 -0.46121 0.721913
WA.ZON.HHZ. 2021-08-16T11:18:13.67 10.0 negative automatic P 291 40.5306 -1.9203 0.751407
G.PEL.BHZ.00 2021-08-16T11:18:12.30 10.0 positive automatic P 288 40.2248 -0.747649 0.725683
GT.CPUP.BHZ.00 2021-08-16T11:18:08.68 10.0 positive automatic P 309 39.8137 -0.855493 0.716755
II.SUR.BHZ.00 2021-08-16T11:18:05.67 10.0 positive automatic P 68 39.2718 0.37127 0.761401
C.GO05.BHZ. 2021-08-16T11:18:05.33 10.0 positive automatic P 285 39.3809 -0.592722 0.350436
G.SPB.BHZ.00 2021-08-16T11:18:02.00 10.0 positive automatic P 323 38.6971 1.71249 0.754659
C1.BO02.BHZ. 2021-08-16T11:18:01.57 10.0 negative automatic P 286 38.9687 -1.04023 0.767312
AU.MAW.BHZ. 2021-08-16T11:17:45.05 10.0 negative automatic P 141 36.9079 -0.00761535 0.737838
C.GO06.BHZ. 2021-08-16T11:17:33.00 10.0 positive automatic P 280 35.6553 -1.55965 0.833421
GT.PLCA.BHZ.00 2021-08-16T11:17:22.30 10.0 negative automatic P 280 34.3336 -0.826851 0.870923
C1.LL02.BHZ. 2021-08-16T11:17:13.95 10.0 negative automatic P 275 33.2581 0.297376 0.789022
G.COYC.BHZ.00 2021-08-16T11:17:01.05 10.0 positive automatic P 272 31.7641 0.514866 0.817256
C.GO10.BHZ. 2021-08-16T11:16:16.43 10.0 negative automatic P 260 26.7616 0.264493 0.963855
C1.MG02.BHZ. 2021-08-16T11:16:08.25 10.0 positive automatic P 262 26.0024 -0.957911 0.987654
II.EFI.BHZ.00 2021-08-16T11:15:17.42 10.0 positive automatic P 273 20.7186 0.745483 0.930233
IU.PMSA.BHZ.00 2021-08-16T11:15:10.82 10.0 negative automatic P 234 20.0583 1.32543 0.851064
GE.SNAA.BHZ. 2021-08-16T11:14:15.56 10.0 positive automatic P 156 15.7858 -3.06207 0.909091
II.HOPE.BHZ.00 2021-08-16T11:12:39.97 10.0 positive automatic P 293 8.2931 3.53301 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