Earthquake with magnitude of Mwp 6.0 on date 06-08-2021 and time 19:22:14 (UTC) in region South Georgia & the South Sandwich Is. [Sea]

A magnitude Mwp 6.0 earthquake occured in region: South Georgia & the South Sandwich Is. [Sea], on

  • 06-08-2021 19:22:14 (UTC)
  • 06-08-2021 21:22:14 (UTC +02:00) Italian time
  • 06-08-2021 17:22:14 (UTC -02:00) local time in the region of the earthquake (Atlantic/South_Georgia)

and geographic coordinates (lat, lon) -59.407, -26.185 at 124 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 5.3
Mwp 6.0

Mwpd 6.1
2021-08-06
19:22:14
-59.407 -26.1849 124 2021-08-06
19:42:46
Sala Sismica INGV-Roma 93766641
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-08-06 19:22:14
Latitude -59.4070
Longitude -26.1849
Depth (km) 124 (from location)
Evaluation mode of Origin automatic
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV-A
Event type earthquake
Origin ID 93766641

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 12233
Semi-minor axis of confidence ellipse (meter) 5853
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 186
Circular confidence region, given by single value of horizontal uncertainty (meter) 10533.8
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 69.8262
Number of associated phases, regardless of their use for origin computation 53
Number of defining phases 53
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 1.04265
Epicentral distance of station closest to the epicenter (degree) 7.60032
Epicentral distance of station farthest from the epicenter (degree) 106.97629
Number of stations at which the event was observed 53
Number of stations from which data was used for origin computation 53
Magnitudes information

Mwpd:6.1

Field Value
Value 6.1
Uncertainty 0.1
Num. used stations 9
Type of magnitude Mwpd
Reference to an origin 93766641
Agency INGV
Autore early-est_ee1.1.9
Time of creation (UTC) 2021-08-06 19:42:46

Mwp:6

Field Value
Value 6
Uncertainty 0.1
Num. used stations 10
Type of magnitude Mwp
Reference to an origin 93766641
Agency INGV
Autore early-est_ee1.1.9
Time of creation (UTC) 2021-08-06 19:42:46

mb:5.3

Field Value
Value 5.3
Uncertainty 0.1
Num. used stations 48
Type of magnitude mb
Reference to an origin 93766641
Agency INGV
Autore early-est_ee1.1.9
Time of creation (UTC) 2021-08-06 19:42:46
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
GE.SNAA.BHZ. 2021-08-06T19:37:39.26 10.0 negative automatic ScS 152 15.4035 -0.615384 0
US.TZTN.BHZ.00 2021-08-06T19:36:18.70 10.0 positive automatic Pdiff 315 106.9763 3.03854 0
PM.ROSA.BHZ. 2021-08-06T19:35:27.68 10.0 positive automatic PcP 358 98.1384 -8.67982 0
AU.QLP.BHZ. 2021-08-06T19:35:17.65 10.0 positive automatic P 171 93.6407 1.76132 0
IU.TEIG.BHZ.00 2021-08-06T19:35:17.85 10.0 negative automatic P 304 94.2442 -0.782969 0.0665168
AU.WRKA.BHZ.00 2021-08-06T19:35:13.70 10.0 negative automatic P 157 92.9666 0.846737 0.0749063
G.ATD.BHZ.00 2021-08-06T19:35:00.20 10.0 negative automatic P 66 89.6306 2.8076 0.0845761
AU.FORT.BHZ.00 2021-08-06T19:34:47.30 10.0 positive automatic P 158 87.3203 0.863148 0.113345
G.TAM.BHZ.00 2021-08-06T19:34:42.25 10.0 negative automatic P 29 86.23 0.891336 0.113568
AU.HTT.BHZ. 2021-08-06T19:34:42.30 10.0 positive automatic P 168 86.3397 0.519433 0.118018
GE.BOAB.BHZ. 2021-08-06T19:34:39.75 10.0 negative automatic P 303 86.1657 -1.12122 0.104727
G.CAN.BHZ.00 2021-08-06T19:34:37.20 10.0 negative automatic P 176 85.1861 1.11994 0.129939
NZ.OUZ.HHZ.10 2021-08-06T19:34:31.12 10.0 positive automatic P 196 83.956 1.33379 0.138698
AU.MILA.BHZ.00 2021-08-06T19:34:30.15 10.0 positive automatic PcP 176 83.4571 -1.28357 0
AU.TOO.BHZ.00 2021-08-06T19:34:24.70 10.0 positive automatic P 173 82.7726 0.878247 0.15188
NZ.URZ.HHZ.10 2021-08-06T19:34:14.75 10.0 positive automatic P 198 80.4405 3.26871 0.166927
II.TAU.BHZ.00 2021-08-06T19:33:56.67 10.0 positive automatic P 175 77.5393 0.997854 0.198702
NZ.KHZ.HHZ.10 2021-08-06T19:33:55.38 10.0 negative automatic P 195 76.88 3.40225 0.198689
II.MBAR.BHZ.00 2021-08-06T19:33:33.95 10.0 negative automatic P 61 73.3311 2.08156 0.221641
IU.OTAV.BHZ.00 2021-08-06T19:33:25.02 10.0 positive automatic P 304 72.0644 0.280321 0.250898
II.ABPO.BHZ.00 2021-08-06T19:32:43.57 10.0 negative automatic P 86 65.2979 1.13392 0.316465
GE.VOI.BHZ. 2021-08-06T19:32:26.05 10.0 positive automatic P 87 62.6497 1.00171 0.365634
II.NNA.BHZ.00 2021-08-06T19:32:10.72 10.0 positive automatic P 300 60.3674 1.09688 0.370821
GT.LPAZ.BHZ.00 2021-08-06T19:31:16.50 10.0 negative automatic P 306 52.7856 -0.222388 0.527351
IU.TSUM.BHZ.00 2021-08-06T19:31:01.92 10.0 negative automatic P 57 50.9332 -0.456666 0.538507
IU.CASY.BHZ.00 2021-08-06T19:30:56.97 10.0 positive automatic P 159 50.2782 -0.278193 0.549156
GT.LBTB.BHZ.00 2021-08-06T19:30:50.63 10.0 positive automatic P 69 49.5073 -0.990014 0.561822
GE.WIN.BHZ. 2021-08-06T19:30:38.10 10.0 positive automatic P 59 47.7352 -0.0675066 0.605572
GT.BOSA.BHZ.00 2021-08-06T19:30:25.98 10.0 negative automatic P 72 46.3097 -1.04632 0.63057
II.SHEL.BHZ.00 2021-08-06T19:30:24.92 10.0 negative automatic P 28 45.9551 0.802202 0.636866
C.GO03.BHZ. 2021-08-06T19:30:06.33 10.0 positive automatic P 297 43.7031 0.0111956 0.694114
AF.ALKP.BHZ. 2021-08-06T19:30:05.84 10.0 negative automatic P 70 43.7566 -0.964565 0.579948
BL.PMNB.HHZ. 2021-08-06T19:30:03.77 10.0 positive automatic P 331 43.4134 -0.264093 0.689484
AF.GRHM.BHZ. 2021-08-06T19:30:00.22 10.0 positive automatic P 77 43.0308 -0.68102 0.658626
C1.VA04.BHZ. 2021-08-06T19:30:00.68 10.0 positive automatic P 283 42.7776 1.89867 0.703057
IU.LCO.BHZ.00 2021-08-06T19:29:59.37 10.0 negative automatic P 295 42.7046 0.812753 0.679859
GT.VNDA.BHZ.00 2021-08-06T19:29:59.98 10.0 positive automatic P 183 42.9831 -0.456869 0.109912
IU.SBA.BHZ.00 2021-08-06T19:29:56.47 10.0 positive automatic P 184 42.5116 -0.146922 0.638803
C.GO04.BHZ. 2021-08-06T19:29:51.45 10.0 positive automatic P 294 41.7662 0.522462 0.174256
II.SUR.BHZ.00 2021-08-06T19:29:45.12 10.0 positive automatic P 70 41.0488 0.106948 0.727203
C1.CO02.BHZ. 2021-08-06T19:29:45.18 10.0 positive automatic P 293 40.9932 0.718689 0.184259
WA.ZON.HHZ. 2021-08-06T19:29:33.60 10.0 positive automatic P 295 39.6324 0.415181 0.772796
GT.CPUP.BHZ.00 2021-08-06T19:29:30.88 10.0 positive automatic P 313 39.4471 -0.659287 0.740364
G.PEL.BHZ.00 2021-08-06T19:29:30.35 10.0 positive automatic P 292 39.227 0.544157 0.711453
C.GO05.BHZ. 2021-08-06T19:29:21.63 10.0 positive automatic P 289 38.3004 -0.349868 0.789827
C1.BO02.BHZ. 2021-08-06T19:29:18.72 10.0 negative automatic P 290 37.9258 -0.254337 0.797315
C.GO06.BHZ. 2021-08-06T19:28:49.05 10.0 positive automatic P 285 34.4639 -0.541356 0.809667
GT.PLCA.BHZ.00 2021-08-06T19:28:37.13 10.0 negative automatic P 284 33.1319 -0.906132 0.875183
C1.LL02.BHZ. 2021-08-06T19:28:27.15 10.0 negative automatic P 280 31.9521 -0.470823 0.89983
C1.MG02.BHZ. 2021-08-06T19:27:18.50 10.0 positive automatic P 267 24.4276 -2.08639 0.97561
II.EFI.BHZ.00 2021-08-06T19:26:29.82 10.0 positive automatic P 279 19.3847 0.107645 0.97561
IU.PMSA.BHZ.00 2021-08-06T19:26:16.17 10.0 positive automatic P 237 18.203 -0.662129 0.930233
II.HOPE.BHZ.00 2021-08-06T19:24:02.52 10.0 positive automatic P 308 7.6003 0.879212 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