Earthquake with magnitude of Mwp 6.9 on date 24-01-2021 and time 00:36:55 (Italy) in region Antarctica [Sea]

A magnitude Mwp 6.9 earthquake occured in region: Antarctica [Sea], on

  • 23-01-2021 23:36:55 (UTC)
  • 24-01-2021 00:36:55 (UTC +01:00) Italian time
  • 23-01-2021 20:36:55 (UTC -03:00) local time in the region of the earthquake (Antarctica/Palmer)

and geographic coordinates (lat, lon) -61.671, -55.497 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 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 5.7
Mwp 6.9

Mwpd 7.0
2021-01-23
23:36:55
-61.6711 -55.4967 20 2021-01-23
23:53:27
Sala Sismica INGV-Roma 86509891
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-01-23 23:36:55
Latitude -61.6711
Longitude -55.4967
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 86509891

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 16665
Semi-minor axis of confidence ellipse (meter) 2147
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 250
Circular confidence region, given by single value of horizontal uncertainty (meter) 13496.7
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 61.5062
Number of associated phases, regardless of their use for origin computation 73
Number of defining phases 73
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 1.58542
Epicentral distance of station closest to the epicenter (degree) 4.9402
Epicentral distance of station farthest from the epicenter (degree) 88.13532
Number of stations at which the event was observed 66
Number of stations from which data was used for origin computation 66
Magnitudes information

Mwpd:7

Field Value
Value 7
Uncertainty 0.1
Num. used stations 42
Type of magnitude Mwpd
Reference to an origin 86509891
Agency INGV
Autore early-est_ee1.1.9
Time of creation (UTC) 2021-01-23 23:53:27

Mwp:6.9

Field Value
Value 6.9
Uncertainty 0.1
Num. used stations 44
Type of magnitude Mwp
Reference to an origin 86509891
Agency INGV
Autore early-est_ee1.1.9
Time of creation (UTC) 2021-01-23 23:53:27

mb:5.7

Field Value
Value 5.7
Uncertainty 0.1
Num. used stations 43
Type of magnitude mb
Reference to an origin 86509891
Agency INGV
Autore early-est_ee1.1.9
Time of creation (UTC) 2021-01-23 23:53:27
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
G.UNM.BHZ.00 2021-01-23T23:49:44.85 10.0 negative automatic PcP 319 88.1353 -0.615573 0
AU.FORT.BHZ.00 2021-01-23T23:49:39.65 10.0 negative automatic P 183 87.501 -0.682343 0.11335
IU.NWAO.BHZ.00 2021-01-23T23:49:28.42 10.0 negative automatic P 174 85.2136 -0.704106 0
IU.TEIG.BHZ.00 2021-01-23T23:49:29.32 10.0 positive automatic P 329 85.9799 -3.55596 0.12219
AU.HTT.BHZ. 2021-01-23T23:49:23.25 10.0 negative automatic P 192 84.1767 -0.707995 0.133428
CU.GRTK.BHZ.00 2021-01-23T23:49:20.90 10.0 positive automatic P 345 84.1207 -2.65277 0.14204
CU.GTBY.BHZ.00 2021-01-23T23:49:18.22 10.0 negative automatic P 341 83.0907 -0.0557043 0.0680054
CU.MTDJ.BHZ.00 2021-01-23T23:49:09.65 10.0 positive automatic P 339 81.8048 -2.05529 0.156697
G.RER.BHZ.00 2021-01-23T23:49:08.05 10.0 positive automatic P 118 80.9276 1.00948 0.151976
CU.SDDR.BHZ.00 2021-01-23T23:49:07.08 10.0 positive automatic P 345 81.6316 -3.66353 0.146182
G.CAN.BHZ.00 2021-01-23T23:49:07.30 10.0 negative automatic P 200 80.9905 -0.0511393 0.169923
CU.ANWB.BHZ.00 2021-01-23T23:49:01.10 10.0 positive automatic P 354 79.4947 1.91539 0.18413
IU.SJG.BHZ.00 2021-01-23T23:49:01.02 10.0 negative automatic P 350 80.229 -2.20581 0.157837
AU.MILA.BHZ.00 2021-01-23T23:48:58.38 10.0 positive automatic P 200 79.2642 0.323443 0.173663
CU.TGUH.BHZ.00 2021-01-23T23:48:57.63 10.0 negative automatic P 329 79.7708 -3.24607 0.081759
GT.DBIC.BHZ.00 2021-01-23T23:48:51.88 10.0 negative automatic P 52 78.6546 -2.71705 0.190042
GE.BOAB.BHZ. 2021-01-23T23:48:46.50 10.0 positive automatic P 330 77.8244 -3.54784 0.186986
GE.VOI.BHZ. 2021-01-23T23:48:42.90 10.0 negative automatic P 111 76.4229 0.598606 0.205088
II.JTS.BHZ.00 2021-01-23T23:48:35.07 10.0 positive automatic P 330 75.5609 -2.17655 0.211328
G.HDC.BHZ.00 2021-01-23T23:48:35.50 10.0 negative automatic P 331 75.0833 0.85144 0.218682
NZ.OUZ.HHZ.10 2021-01-23T23:48:34.89 10.0 negative automatic P 220 75.2934 -0.77106 0.224889
G.FOMA.BHZ.00 2021-01-23T23:48:29.35 10.0 positive automatic P 113 73.8116 2.29526 0.221678
II.TAU.BHZ.00 2021-01-23T23:48:27.17 10.0 positive automatic P 197 73.7994 0.168196 0.237644
CU.GRGR.BHZ.00 2021-01-23T23:48:25.75 10.0 negative automatic P 354 73.9598 -2.21299 0.230417
NZ.URZ.HHZ.10 2021-01-23T23:48:12.77 10.0 negative automatic P 221 71.4058 0.0154662 0.253522
IU.SDV.BHZ.00 2021-01-23T23:48:10.12 10.0 negative automatic P 344 71.5373 -3.6942 0.259787
IU.SNZO.BHZ.00 2021-01-23T23:48:03.15 10.0 positive automatic P 218 69.3324 3.06207 0
NZ.KHZ.HHZ.10 2021-01-23T23:47:55.74 10.0 positive automatic P 217 68.6476 -0.0782642 0.277172
NZ.ODZ.HHZ.10 2021-01-23T23:47:46.94 10.0 negative automatic P 214 67.0061 1.42086 0.294798
IU.PAYG.BHZ.00 2021-01-23T23:47:44.35 10.0 positive automatic P 322 66.4163 2.5928 0.324714
G.MPG.BHZ.00 2021-01-23T23:47:40.55 10.0 positive automatic P 3 66.8148 -3.72837 0.312234
IU.TSUM.BHZ.00 2021-01-23T23:47:32.77 10.0 positive automatic P 85 65.1668 -1.1028 0.3253
IU.OTAV.BHZ.00 2021-01-23T23:47:27.07 10.0 positive automatic P 334 64.3198 -1.66704 0.335915
GT.LBTB.BHZ.00 2021-01-23T23:47:25.05 10.0 negative automatic P 95 63.9703 -0.98239 0.356551
GE.WIN.BHZ. 2021-01-23T23:47:12.65 10.0 negative automatic P 86 62.0307 -0.597599 0.365452
GT.BOSA.BHZ.00 2021-01-23T23:47:03.75 10.0 negative automatic P 97 60.7553 -0.797534 0.386843
AF.ALKP.BHZ. 2021-01-23T23:46:46.66 10.0 negative automatic P 95 58.2188 -0.347959 0.427107
II.SHEL.BHZ.00 2021-01-23T23:46:42.47 10.0 negative automatic P 60 57.5308 0.388061 0.447484
IU.RCBR.BHZ.00 2021-01-23T23:46:42.32 10.0 positive automatic P 23 57.7138 -1.02567 0.424542
II.SUR.BHZ.00 2021-01-23T23:46:28.77 10.0 positive automatic P 95 55.5086 0.872532 0.478169
II.NNA.BHZ.00 2021-01-23T23:46:02.32 10.0 positive automatic P 333 52.0337 0.0578429 0.52087
IU.CASY.BHZ.00 2021-01-23T23:45:59.47 10.0 negative automatic P 173 51.6361 0.27142 0.527215
II.RPN.BHZ.00 2021-01-23T23:45:45.27 10.0 positive automatic P 289 49.4139 2.84355 0.515441
GT.LPAZ.BHZ.00 2021-01-23T23:45:17.90 10.0 positive automatic P 343 46.2623 -0.914727 0.624005
BL.PMNB.HHZ. 2021-01-23T23:44:56.28 10.0 positive automatic P 12 43.5972 -0.658557 0.634253
AU.MAW.BHZ. 2021-01-23T23:44:55.50 10.0 positive automatic P 151 43.284 1.24941 0.654177
GT.VNDA.BHZ.00 2021-01-23T23:44:19.83 10.0 negative automatic P 192 38.9302 1.37377 0.701299
G.SPB.BHZ.00 2021-01-23T23:44:14.55 10.0 positive automatic P 12 38.475 -0.168366 0.777014
IU.SBA.BHZ.00 2021-01-23T23:44:13.35 10.0 negative automatic P 193 38.1305 1.62305 0.756774
GT.CPUP.BHZ.00 2021-01-23T23:43:46.93 10.0 positive automatic P 357 35.3604 -1.21391 0.829587
IU.LCO.BHZ.00 2021-01-23T23:43:37.87 10.0 negative automatic P 336 34.1698 -0.356183 0.281294
C.GO04.BHZ. 2021-01-23T23:43:28.28 10.0 negative automatic P 335 33.0574 -0.241297 0.292251
C1.CO02.BHZ. 2021-01-23T23:43:20.18 10.0 negative automatic P 335 32.0957 0.243157 0.29547
WA.ZON.HHZ. 2021-01-23T23:43:12.87 10.0 positive automatic P 338 31.3202 -0.167547 0.471006
G.PEL.BHZ.00 2021-01-23T23:43:02.90 10.0 positive automatic P 334 30.1471 0.226295 0.886105
C.GO05.BHZ. 2021-01-23T23:42:48.85 10.0 negative automatic P 331 28.6209 -0.186564 0.888889
C1.BO02.BHZ. 2021-01-23T23:42:48.82 10.0 positive automatic P 333 28.575 0.0550446 0.888889
C.GO06.BHZ. 2021-01-23T23:42:07.78 10.0 positive automatic P 329 24.1473 -1.0941 0.720721
GT.PLCA.BHZ.00 2021-01-23T23:41:54.60 10.0 positive automatic P 330 22.8342 -1.32592 0.91954
GE.SNAA.BHZ. 2021-01-23T23:41:48.46 10.0 negative automatic P 138 22.1648 -0.319947 0.930233
C1.LL02.BHZ. 2021-01-23T23:41:35.33 10.0 positive automatic P 325 20.8617 0.614607 0.898876
G.COYC.BHZ.00 2021-01-23T23:41:13.75 10.0 positive automatic P 322 18.7422 2.17569 0.930233
II.HOPE.BHZ.00 2021-01-23T23:39:51.22 10.0 positive automatic P 62 12.4206 1.58366 0.909091
C1.MG02.BHZ. 2021-01-23T23:39:38.83 10.0 negative automatic P 314 11.539 1.23451 0.97561
II.EFI.BHZ.00 2021-01-23T23:39:20.27 10.0 negative automatic P 351 10.0924 2.47395 0.987654
IU.PMSA.BHZ.00 2021-01-23T23:38:05.02 10.0 negative automatic P 227 4.9402 -2.05638 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