Earthquake with magnitude of Mwp 6.7 on date 22-08-2021 and time 02:45:12 (Italy) 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

  • 22-08-2021 00:45:12 (UTC)
  • 22-08-2021 02:45:12 (UTC +02:00) Italian time
  • 21-08-2021 22:45:12 (UTC -02:00) local time in the region of the earthquake (Atlantic/South_Georgia)

and geographic coordinates (lat, lon) -60.054, -24.258 at 20 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 6.9
2021-08-22
00:45:12
-60.0539 -24.2578 20 2021-08-22
01:08:41
Sala Sismica INGV-Roma 94479721
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-08-22 00:45:12
Latitude -60.0539
Longitude -24.2578
Depth (km) 20 (from location)
Evaluation mode of Origin automatic
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV-A
Event type earthquake
Origin ID 94479721

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 15859
Semi-minor axis of confidence ellipse (meter) 3795
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 197
Circular confidence region, given by single value of horizontal uncertainty (meter) 13159.3
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 51.5105
Number of associated phases, regardless of their use for origin computation 121
Number of defining phases 121
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 1.66326
Epicentral distance of station closest to the epicenter (degree) 8.76549
Epicentral distance of station farthest from the epicenter (degree) 113.27501
Number of stations at which the event was observed 115
Number of stations from which data was used for origin computation 115
Magnitudes information

Mwpd:6.9

Field Value
Value 6.9
Uncertainty 0.1
Num. used stations 57
Type of magnitude Mwpd
Reference to an origin 94479721
Agency INGV
Autore early-est_ee1.1.9
Time of creation (UTC) 2021-08-22 01:08:41

Mwp:6.8

Field Value
Value 6.8
Uncertainty 0.1
Num. used stations 55
Type of magnitude Mwp
Reference to an origin 94479721
Agency INGV
Autore early-est_ee1.1.9
Time of creation (UTC) 2021-08-22 01:08:41

mb:5.7

Field Value
Value 5.7
Uncertainty 0.1
Num. used stations 60
Type of magnitude mb
Reference to an origin 94479721
Agency INGV
Autore early-est_ee1.1.9
Time of creation (UTC) 2021-08-22 01:08:41
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
US.AAM.BHZ.00 2021-08-22T00:59:51.80 10.0 negative automatic Pdiff 316 113.275 -1.24772 0
GE.BKB.BHZ. 2021-08-22T00:59:51.67 10.0 positive automatic Pdiff 138 111.8351 5.03663 0
GE.WLF.BHZ. 2021-08-22T00:59:49.45 10.0 negative automatic Pdiff 21 112.443 0.0810642 0
US.LONY.BHZ.00 2021-08-22T00:59:48.20 10.0 negative automatic Pdiff 324 112.439 -1.1751 0
US.PKME.BHZ.00 2021-08-22T00:59:47.88 10.0 positive automatic Pdiff 328 111.5401 2.55245 0
IU.CCM.BHZ.00 2021-08-22T00:59:47.50 10.0 negative automatic Pdiff 308 112.358 -1.48368 0
MN.BZS.BHZ. 2021-08-22T00:59:47.37 10.0 negative automatic Pdiff 33 112.1001 -0.47093 0
US.ERPA.BHZ.00 2021-08-22T00:59:45.95 10.0 negative automatic Pdiff 319 111.8721 -0.885848 0
US.ACSO.BHZ.00 2021-08-22T00:59:43.05 10.0 negative automatic Pdiff 316 111.2061 -0.822977 0
US.LBNH.BHZ.00 2021-08-22T00:59:43.70 10.0 negative automatic Pdiff 325 111.3221 -0.697103 0
US.BINY.BHZ.00 2021-08-22T00:59:43.30 10.0 positive automatic Pdiff 322 110.6651 1.80187 0
IU.ANTO.BHZ.00 2021-08-22T00:59:40.72 10.0 negative automatic Pdiff 43 110.3021 0.732391 0
IU.HRV.BHZ.00 2021-08-22T00:59:39.32 10.0 positive automatic Pdiff 325 109.6232 2.50538 0
US.MIAR.BHZ.00 2021-08-22T00:59:38.98 10.0 negative automatic Pdiff 305 110.2471 -0.612575 0
RD.ROSF.BHZ. 2021-08-22T00:59:37.00 10.0 negative automatic Pdiff 15 109.7192 -0.256748 0
RD.LOR.BHZ. 2021-08-22T00:59:37.40 10.0 negative automatic Pdiff 20 109.7332 0.038723 0
IU.SSPA.BHZ.00 2021-08-22T00:59:36.85 10.0 negative automatic Pdiff 319 109.8522 -1.00155 0
IV.MGAB.BHZ. 2021-08-22T00:59:25.05 10.0 negative automatic Pdiff 27 107.1883 -1.00585 0
IV.SALO.BHZ. 2021-08-22T00:59:35.05 10.0 negative automatic Pdiff 25 109.4172 -0.920768 0
US.JCT.BHZ.00 2021-08-22T00:59:34.73 10.0 negative automatic Pdiff 298 109.3922 -1.13136 0
IU.WVT.BHZ.00 2021-08-22T00:59:33.80 10.0 negative automatic Pdiff 310 109.3522 -1.81085 0
GE.CSS.BHZ. 2021-08-22T00:59:21.40 10.0 negative automatic Pdiff 46 106.0913 0.254853 0
MN.PDG.BHZ. 2021-08-22T00:59:31.72 10.0 negative automatic Pdiff 32 108.5032 -0.0864971 0
IV.BOB.BHZ. 2021-08-22T00:59:30.00 10.0 negative automatic Pdiff 25 108.3792 -0.415977 0
IV.MONC.BHZ. 2021-08-22T00:59:30.98 10.0 negative automatic Pdiff 23 108.3642 -0.295219 0
US.NATX.BHZ.00 2021-08-22T00:59:30.95 10.0 negative automatic Pdiff 302 108.2792 0.115099 0
GE.ISP.BHZ.00 2021-08-22T00:59:28.25 10.0 negative automatic Pdiff 43 107.7043 -0.193645 0
US.BLA.BHZ.00 2021-08-22T00:59:27.90 10.0 negative automatic Pdiff 316 107.6123 -0.0488138 0
GE.BKNI.BHZ. 2021-08-22T00:59:25.77 10.0 negative automatic Pdiff 121 107.0553 0.394333 0
GE.SOEI.BHZ. 2021-08-22T00:59:21.02 10.0 negative automatic Pdiff 148 105.8243 0.947348 0
RD.MTLF.BHZ. 2021-08-22T00:59:18.06 10.0 negative automatic Pdiff 20 105.6443 -1.092 0
MN.CUC.BHZ. 2021-08-22T00:59:16.17 10.0 positive automatic Pdiff 31 105.3184 -1.5847 0
MN.TIP.BHZ. 2021-08-22T00:59:14.57 10.0 positive automatic Pdiff 32 104.7954 -0.881347 0
HL.ITM.HHZ. 2021-08-22T00:59:13.47 10.0 negative automatic Pdiff 36 104.3694 -0.0322335 0
II.RAYN.BHZ.00 2021-08-22T00:58:58.17 10.0 negative automatic Pdiff 61 100.8016 0.496918 0
IU.PAB.BHZ.00 2021-08-22T00:58:57.72 10.0 negative automatic Pdiff 16 100.9336 -0.596039 0
II.MSVF.BHZ.00 2021-08-22T00:58:55.72 10.0 negative automatic Pdiff 202 100.1186 1.05679 0
PM.PESTR.BHZ. 2021-08-22T00:58:53.35 10.0 positive automatic Pdiff 13 99.8651 -0.126269 0
IU.CTAO.BHZ.00 2021-08-22T00:58:52.15 10.0 negative automatic P 171 99.4808 0.393166 0.0385772
ND.KOUNC.BHZ.00 2021-08-22T00:58:50.60 10.0 negative automatic PcP 188 99.0899 0.635304 0.0385178
PM.ROSA.BHZ. 2021-08-22T00:58:49.63 10.0 negative automatic PcP 357 98.825 0.796918 0
AU.FITZ.BHZ. 2021-08-22T00:58:46.15 10.0 negative automatic P 151 98.1161 0.543889 0.0462158
II.WRAB.BHZ.00 2021-08-22T00:58:45.12 10.0 positive automatic P 160 98.134 -0.61112 0.0455943
MX.TLIG.BHZ. 2021-08-22T00:58:43.89 10.0 negative automatic P 292 97.6242 0.323711 0.0413017
ND.ONTNC.BHZ.00 2021-08-22T00:58:42.30 10.0 negative automatic P 190 97.1695 0.954828 0.0502472
MX.CCIG.BHZ. 2021-08-22T00:58:37.87 10.0 positive automatic sP 297 93.579 4.84769 0
IU.TEIG.BHZ.00 2021-08-22T00:58:32.82 10.0 negative automatic P 302 95.4111 -0.523242 0.0520501
AU.EIDS.BHZ. 2021-08-22T00:58:29.40 10.0 negative automatic P 176 94.4871 0.242682 0.0651351
MX.CCIG.BHZ. 2021-08-22T00:58:24.87 10.0 positive automatic P 297 93.579 -0.352283 0
IU.MBWA.BHZ.00 2021-08-22T00:58:24.00 10.0 negative automatic P 147 93.654 -0.320418 0.0646144
AU.QLP.BHZ. 2021-08-22T00:58:22.42 10.0 negative automatic P 170 92.8434 0.834559 0.0739004
AU.WRKA.BHZ.00 2021-08-22T00:58:18.28 10.0 negative automatic P 155 91.9822 0.595953 0.0800831
CU.GRTK.BHZ.00 2021-08-22T00:58:08.45 10.0 negative automatic P 317 90.0111 0.0265171 0.0774421
AU.ARMA.BHZ. 2021-08-22T00:58:06.82 10.0 negative automatic P 176 89.4604 0.790391 0.0978422
G.ATD.BHZ.00 2021-08-22T00:58:06.00 10.0 negative automatic P 65 89.0173 2.13015 0.100958
CU.TGUH.BHZ.00 2021-08-22T00:58:05.13 10.0 negative automatic P 300 89.4653 -0.934026 0.0966571
CU.SDDR.BHZ.00 2021-08-22T00:57:56.60 10.0 positive automatic P 316 87.7093 -1.08018 0.101946
GE.BOAB.BHZ. 2021-08-22T00:57:54.45 10.0 negative automatic P 301 87.332 -1.38205 0.103408
G.TAM.BHZ.00 2021-08-22T00:57:51.30 10.0 negative automatic P 27 86.3413 0.13013 0.105714
AU.FORT.BHZ.00 2021-08-22T00:57:51.75 10.0 positive automatic P 156 86.348 0.761842 0.119343
AU.RIV.BHZ. 2021-08-22T00:57:50.72 10.0 negative automatic P 176 86.0367 1.29131 0.123189
AU.HTT.BHZ. 2021-08-22T00:57:47.72 10.0 negative automatic P 166 85.488 0.893379 0.127523
AU.MORW.BHZ. 2021-08-22T00:57:44.97 10.0 negative automatic P 146 85.1032 0.138286 0.130606
II.JTS.BHZ.00 2021-08-22T00:57:44.30 10.0 negative automatic P 301 85.0853 -0.454386 0.120693
IU.SJG.BHZ.00 2021-08-22T00:57:43.02 10.0 negative automatic P 320 85.1859 -2.24718 0.108069
G.CAN.BHZ.00 2021-08-22T00:57:42.80 10.0 negative automatic P 174 84.4614 1.13174 0.129658
NZ.OUZ.HHZ.10 2021-08-22T00:57:38.40 10.0 positive automatic P 195 83.5898 1.2898 0.145166
CU.ANWB.BHZ.00 2021-08-22T00:57:35.15 10.0 negative automatic P 324 83.4377 -1.18904 0.121277
AU.MILA.BHZ.00 2021-08-22T00:57:33.93 10.0 negative automatic P 175 82.7359 1.09833 0.143553
IU.NWAO.BHZ.00 2021-08-22T00:57:27.62 10.0 positive automatic P 148 81.7682 -0.0750509 0.157007
NZ.URZ.HHZ.10 2021-08-22T00:57:20.51 10.0 negative automatic P 197 80.118 1.66174 0.17556
CU.GRGR.BHZ.00 2021-08-22T00:57:06.97 10.0 negative automatic P 323 78.1314 -1.02138 0.0890116
IU.SNZO.BHZ.00 2021-08-22T00:57:06.12 10.0 negative automatic P 194 77.4422 1.97721 0.195025
II.TAU.BHZ.00 2021-08-22T00:57:01.42 10.0 negative automatic P 174 76.8009 0.877604 0.176668
NZ.KHZ.HHZ.10 2021-08-22T00:57:00.13 10.0 negative automatic P 193 76.4897 1.36174 0.18943
NZ.ODZ.HHZ.10 2021-08-22T00:56:47.11 10.0 positive automatic P 191 74.1936 1.50194 0.243812
IU.OTAV.BHZ.00 2021-08-22T00:56:40.02 10.0 negative automatic P 302 73.2313 -0.495233 0.222645
II.MBAR.BHZ.00 2021-08-22T00:56:39.22 10.0 negative automatic P 59 72.8131 1.53801 0.242698
GT.DBIC.BHZ.00 2021-08-22T00:56:10.13 10.0 negative automatic P 21 68.4659 -0.846774 0.302771
G.RER.BHZ.00 2021-08-22T00:56:02.20 10.0 positive automatic P 92 66.8065 1.58082 0.305222
GE.VOI.BHZ. 2021-08-22T00:55:28.00 10.0 positive automatic P 85 61.7241 0.641252 0.338695
II.NNA.BHZ.00 2021-08-22T00:55:25.07 10.0 negative automatic P 298 61.53 -0.879168 0.341055
GT.LPAZ.BHZ.00 2021-08-22T00:54:32.55 10.0 negative automatic P 305 53.9519 -0.863966 0.502461
CX.MNMCX.BHZ. 2021-08-22T00:54:18.15 10.0 negative automatic P 302 52.0103 -0.50861 0.487229
IU.TSUM.BHZ.00 2021-08-22T00:54:07.12 10.0 negative automatic P 55 50.4894 0.0494653 0.572331
IU.CASY.BHZ.00 2021-08-22T00:53:59.52 10.0 negative automatic P 158 49.3197 1.55459 0.578377
GT.LBTB.BHZ.00 2021-08-22T00:53:54.20 10.0 negative automatic P 67 48.8461 -0.336809 0.593504
GE.WIN.BHZ. 2021-08-22T00:53:42.55 10.0 negative automatic P 56 47.2638 0.147814 0.572862
II.SHEL.BHZ.00 2021-08-22T00:53:34.22 10.0 negative automatic P 25 46.1014 1.13304 0.605434
GT.BOSA.BHZ.00 2021-08-22T00:53:29.08 10.0 negative automatic P 69 45.6116 -0.271792 0.628042
C.GO03.BHZ. 2021-08-22T00:53:22.48 10.0 negative automatic P 295 44.86 -0.813616 0.65651
BL.PMNB.HHZ. 2021-08-22T00:53:19.51 10.0 negative automatic P 329 44.4558 -0.593047 0.61958
IU.LCO.BHZ.00 2021-08-22T00:53:14.77 10.0 negative automatic P 294 43.8569 -0.76004 0.659074
AF.ALKP.BHZ. 2021-08-22T00:53:09.51 10.0 negative automatic P 67 43.0936 0.340528 0.688825
C.GO04.BHZ. 2021-08-22T00:53:06.78 10.0 negative automatic P 293 42.915 -1.12403 0.538328
GT.VNDA.BHZ.00 2021-08-22T00:53:05.20 10.0 negative automatic P 182 42.3748 2.03107 0.310445
IU.SBA.BHZ.00 2021-08-22T00:53:02.15 10.0 negative automatic P 183 41.9294 2.61722 0.355275
AF.GRHM.BHZ. 2021-08-22T00:53:02.42 10.0 negative automatic P 74 42.2555 0.136876 0.672409
C1.CO02.BHZ. 2021-08-22T00:53:01.15 10.0 negative automatic P 292 42.1381 -0.275364 0.682262
II.SUR.BHZ.00 2021-08-22T00:52:48.07 10.0 negative automatic P 67 40.3781 1.00494 0.690683
G.PEL.BHZ.00 2021-08-22T00:52:46.65 10.0 negative automatic P 291 40.3665 -0.134397 0.758293
GT.CPUP.BHZ.00 2021-08-22T00:52:46.35 10.0 negative automatic P 311 40.601 -2.27317 0.671769
G.SPB.BHZ.00 2021-08-22T00:52:42.95 10.0 positive automatic P 326 39.8804 0.208745 0.629662
C.GO05.BHZ. 2021-08-22T00:52:38.25 10.0 negative automatic P 288 39.4251 -0.605815 0.749496
C1.BO02.BHZ. 2021-08-22T00:52:34.67 10.0 negative automatic P 289 39.058 -1.25486 0.698996
AU.MAW.BHZ. 2021-08-22T00:52:09.08 10.0 negative automatic P 139 35.8375 0.580574 0.839712
C.GO06.BHZ. 2021-08-22T00:52:05.05 10.0 positive automatic P 283 35.563 -1.29709 0.825475
C1.LL01.BHZ. 2021-08-22T00:51:49.78 10.0 positive automatic P 279 33.8953 -1.96341 0.839661
C1.LL02.BHZ. 2021-08-22T00:51:43.15 10.0 positive automatic P 279 33.0157 -0.971651 0.85742
G.COYC.BHZ.00 2021-08-22T00:51:30.00 10.0 negative automatic P 276 31.4136 -0.0395321 0.880128
C.GO10.BHZ. 2021-08-22T00:50:42.73 10.0 negative automatic P 264 26.0554 0.338215 0.43956
C1.MG02.BHZ. 2021-08-22T00:50:34.83 10.0 negative automatic P 266 25.3578 -1.14129 0.941176
II.EFI.BHZ.00 2021-08-22T00:49:46.92 10.0 negative automatic P 279 20.4471 0.473249 0.941176
IU.PMSA.BHZ.00 2021-08-22T00:49:29.97 10.0 negative automatic P 238 18.6773 2.86964 0.930233
GE.SNAA.BHZ. 2021-08-22T00:48:28.61 10.0 positive automatic P 152 14.3786 -4.16965 0.851064
II.HOPE.BHZ.00 2021-08-22T00:47:20.62 10.0 positive automatic P 306 8.7655 4.75607 0.833333
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