Earthquake with magnitude of Mwp 6.1 on date 20-12-2021 and time 03:39:37 (UTC) in region South Georgia & the South Sandwich Is. [Sea]

A magnitude Mwp 6.1 earthquake occured in region: South Georgia & the South Sandwich Is. [Sea], on

  • 20-12-2021 03:39:37 (UTC)
  • 20-12-2021 04:39:37 (UTC +01:00) Italian time
  • 20-12-2021 01:39:37 (UTC -02:00) local time in the region of the earthquake (Atlantic/South_Georgia)

and geographic coordinates (lat, lon) -56.6370, -24.0500 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
Felt maps
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100
mb 5.5
Mwp 6.1

Mwpd 6.2
2021-12-20
03:39:37
-56.6367 -24.0495 10 2021-12-20
04:03:45
Sala Sismica INGV-Roma 98742881
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-12-20 03:39:37
Latitude -56.6367
Longitude -24.0495
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 98742881

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 18025
Semi-minor axis of confidence ellipse (meter) 2535
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 187
Circular confidence region, given by single value of horizontal uncertainty (meter) 14614.3
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 58.0799
Number of associated phases, regardless of their use for origin computation 68
Number of defining phases 68
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 1.2491
Epicentral distance of station closest to the epicenter (degree) 7.42184
Epicentral distance of station farthest from the epicenter (degree) 104.08841
Number of stations at which the event was observed 65
Number of stations from which data was used for origin computation 65
Magnitudes information

Mwpd:6.2

Field Value
Value 6.2
Uncertainty 0.1
Num. used stations 26
Type of magnitude Mwpd
Reference to an origin 98742881
Agency INGV
Autore early-est_ee1.1.9
Time of creation (UTC) 2021-12-20 04:03:45

Mwp:6.1

Field Value
Value 6.1
Uncertainty 0.1
Num. used stations 25
Type of magnitude Mwp
Reference to an origin 98742881
Agency INGV
Autore early-est_ee1.1.9
Time of creation (UTC) 2021-12-20 04:03:45

mb:5.5

Field Value
Value 5.5
Uncertainty 0.1
Num. used stations 47
Type of magnitude mb
Reference to an origin 98742881
Agency INGV
Autore early-est_ee1.1.9
Time of creation (UTC) 2021-12-20 04:03:45
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.MGAB.BHZ. 2021-12-20T03:53:44.10 10.0 negative automatic Pdiff 26 104.0884 5.13242 0
IU.CTAO.BHZ.00 2021-12-20T03:53:36.72 10.0 negative automatic Pdiff 171 102.8365 3.35542 0
AU.QLP.BHZ. 2021-12-20T03:53:03.75 10.0 negative automatic PcP 169 96.1846 -0.0237824 0
IU.TEIG.BHZ.00 2021-12-20T03:52:51.17 10.0 positive automatic P 302 93.6870 -0.95865 0.0697435
AU.ARMA.BHZ. 2021-12-20T03:52:49.07 10.0 positive automatic P 176 92.8635 0.544881 0.0697271
AU.LHI.BHZ.00 2021-12-20T03:52:46.40 10.0 positive automatic P 183 91.7997 2.96898 0.0651406
AU.FORT.BHZ.00 2021-12-20T03:52:32.63 10.0 negative automatic P 156 89.4347 0.186888 0.0992034
AU.HTT.BHZ. 2021-12-20T03:52:29.65 10.0 negative automatic P 166 88.7758 0.20572 0.102678
G.CAN.BHZ.00 2021-12-20T03:52:25.85 10.0 positive automatic P 174 87.8514 0.787194 0.109392
AU.MORW.BHZ. 2021-12-20T03:52:24.52 10.0 negative automatic P 146 87.8714 -0.567469 0.106704
NZ.OUZ.HHZ.10 2021-12-20T03:52:20.51 10.0 positive automatic P 194 86.9257 0.0253224 0.114154
AU.MILA.BHZ.00 2021-12-20T03:52:17.23 10.0 negative automatic P 175 86.1277 0.53258 0.111829
GE.BOAB.BHZ. 2021-12-20T03:52:12.00 10.0 negative automatic P 301 85.6816 -1.42032 0.117587
AU.TOO.BHZ.00 2021-12-20T03:52:12.90 10.0 positive automatic P 172 85.3718 -0.00757974 0.122612
CU.SDDR.BHZ.00 2021-12-20T03:52:11.05 10.0 negative automatic P 316 85.3264 -1.63207 0.118906
IU.NWAO.BHZ.00 2021-12-20T03:52:08.35 10.0 negative automatic P 148 84.6135 -0.72005 0.137868
NZ.URZ.HHZ.10 2021-12-20T03:52:03.92 10.0 negative automatic P 197 83.4219 0.979748 0
II.JTS.BHZ.00 2021-12-20T03:52:02.97 10.0 negative automatic P 300 83.4546 -0.1794 0.14254
G.TAM.BHZ.00 2021-12-20T03:52:01.60 10.0 negative automatic P 27 83.2544 -0.698574 0.133247
IU.SJG.BHZ.00 2021-12-20T03:51:56.55 10.0 negative automatic P 320 82.6292 -2.34183 0.141227
IU.SNZO.BHZ.00 2021-12-20T03:51:49.42 10.0 negative automatic P 194 80.7801 0.341191 0.114584
NZ.KHZ.HHZ.10 2021-12-20T03:51:48.69 10.0 positive automatic P 193 79.8408 4.67598 0.174812
II.TAU.BHZ.00 2021-12-20T03:51:46.07 10.0 negative automatic P 174 80.1848 0.186039 0.173269
NZ.ODZ.HHZ.10 2021-12-20T03:51:33.14 10.0 positive automatic P 191 77.5713 1.58745 0.194678
IU.PAYG.BHZ.00 2021-12-20T03:51:27.02 10.0 negative automatic P 290 76.6160 0.837449 0.187863
CU.GRGR.BHZ.00 2021-12-20T03:51:19.32 10.0 negative automatic P 322 75.4941 -0.463403 0
GE.KMBO.BHZ.00 2021-12-20T03:51:11.87 10.0 negative automatic P 66 73.7094 2.1454 0.233063
IU.OTAV.BHZ.00 2021-12-20T03:50:57.37 10.0 positive automatic P 301 71.5358 0.310909 0.262885
II.MBAR.BHZ.00 2021-12-20T03:50:54.22 10.0 negative automatic P 60 70.9793 0.892269 0.266121
G.RER.BHZ.00 2021-12-20T03:50:30.70 10.0 negative automatic P 94 66.8841 2.9428 0.304291
GT.DBIC.BHZ.00 2021-12-20T03:50:15.18 10.0 negative automatic P 21 65.2350 -1.85966 0.343983
GE.VOI.BHZ. 2021-12-20T03:49:52.00 10.0 negative automatic P 87 61.3741 0.370779 0.38284
II.NNA.BHZ.00 2021-12-20T03:49:42.92 10.0 positive automatic P 296 60.0787 0.219736 0.410255
C1.BO02.BHZ. 2021-12-20T03:46:55.80 10.0 positive automatic P 285 38.1738 0.718811 0.802021
IU.CASY.BHZ.00 2021-12-20T03:48:48.52 10.0 negative automatic P 159 52.4557 0.339615 0.480628
GT.LPAZ.BHZ.00 2021-12-20T03:48:47.73 10.0 negative automatic P 302 52.1588 0.917322 0.544175
CX.MNMCX.BHZ. 2021-12-20T03:48:34.20 10.0 negative automatic P 299 50.3850 1.13108 0.534974
IU.TSUM.BHZ.00 2021-12-20T03:48:17.82 10.0 negative automatic P 57 48.4790 -0.511371 0.56579
GT.LBTB.BHZ.00 2021-12-20T03:48:09.78 10.0 negative automatic P 70 47.4768 -0.778505 0.617418
IU.SBA.BHZ.00 2021-12-20T03:47:55.07 10.0 positive automatic P 183 45.3470 1.43408 0.625405
GE.WIN.BHZ. 2021-12-20T03:47:53.55 10.0 negative automatic P 59 45.3306 -0.248813 0.604833
GT.BOSA.BHZ.00 2021-12-20T03:47:45.30 10.0 positive automatic P 72 44.3736 -0.79503 0.681562
C.GO03.BHZ. 2021-12-20T03:47:39.75 10.0 negative automatic P 292 43.5875 0.068412 0.656277
II.SHEL.BHZ.00 2021-12-20T03:47:34.47 10.0 positive automatic P 26 42.9741 -0.228433 0.707898
IU.LCO.BHZ.00 2021-12-20T03:47:32.57 10.0 negative automatic P 290 42.6747 0.0065978 0.664942
C.GO04.BHZ. 2021-12-20T03:47:25.38 10.0 positive automatic P 289 41.7927 0.0250691 0.713125
AF.ALKP.BHZ. 2021-12-20T03:47:24.67 10.0 negative automatic P 70 41.7423 -0.0908115 0.714075
C1.CO02.BHZ. 2021-12-20T03:47:19.25 10.0 positive automatic P 288 41.0776 -0.0670188 0.744382
WA.ZON.HHZ. 2021-12-20T03:47:05.93 10.0 negative automatic P 290 39.6024 -1.09965 0.74786
G.PEL.BHZ.00 2021-12-20T03:47:05.00 10.0 positive automatic P 286 39.3858 -0.207679 0.741531
II.SUR.BHZ.00 2021-12-20T03:47:03.32 10.0 negative automatic P 71 39.0593 0.656915 0.698976
C.GO05.BHZ. 2021-12-20T03:46:57.50 10.0 negative automatic P 283 38.6218 -1.20492 0.802779
AU.MAW.BHZ. 2021-12-20T03:46:56.78 10.0 negative automatic P 142 38.4198 -0.219022 0.751246
G.SPB.BHZ.00 2021-12-20T03:46:48.15 10.0 negative automatic P 323 37.1652 1.65002 0.71754
C.GO06.BHZ. 2021-12-20T03:46:26.13 10.0 positive automatic P 279 35.0177 -2.09732 0.826776
C1.LL01.BHZ. 2021-12-20T03:46:17.43 10.0 positive automatic P 274 33.6045 1.6598 0.89707
GT.PLCA.BHZ.00 2021-12-20T03:46:15.68 10.0 negative automatic P 278 33.7099 -1.17704 0.873514
C1.LL02.BHZ. 2021-12-20T03:46:07.30 10.0 negative automatic P 273 32.7560 -1.11051 0.872736
G.COYC.BHZ.00 2021-12-20T03:45:56.25 10.0 negative automatic P 270 31.3621 0.108663 0.923148
C.GO10.BHZ. 2021-12-20T03:45:17.60 10.0 negative automatic P 257 26.7102 2.75266 0.909091
C1.MG02.BHZ. 2021-12-20T03:45:06.65 10.0 positive automatic P 259 25.8948 -0.72973 0.97561
IU.PMSA.BHZ.00 2021-12-20T03:44:16.02 10.0 positive automatic P 231 20.7551 -0.204425 0.930233
II.EFI.BHZ.00 2021-12-20T03:44:10.87 10.0 positive automatic P 270 20.2969 -0.39293 0.97561
GE.SNAA.BHZ. 2021-12-20T03:43:36.81 10.0 negative automatic P 158 17.4346 -1.93424 0.909091
II.HOPE.BHZ.00 2021-12-20T03:41:23.72 10.0 positive automatic P 283 7.4218 0.0391489 0.909091
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