Earthquake with magnitude of Mwp 6.0 on date 25-11-2020 and time 22:56:06 (UTC) in region Balleny Islands region [Sea]

A magnitude Mwp 6.0 earthquake occured in region: Balleny Islands region [Sea], on

  • 25-11-2020 22:56:06 (UTC)
  • 25-11-2020 23:56:06 (UTC +01:00) Italian time
  • 26-11-2020 08:56:06 (UTC +10:00) local time in the region of the earthquake (Antarctica/DumontDUrville)

and geographic coordinates (lat, lon) -62.191, 155.039 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

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 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,
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 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
mb 5.2
Mwp 6.0

Mwpd 5.9
-62.1914 155.039 20 2020-11-25
Sala Sismica INGV-Roma 85019641
Preferred location and magnitude until now.
Origin information


Field Value
Time (UTC) 2020-11-25 22:56:06
Latitude -62.1914
Longitude 155.0390
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 85019641


Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 23251
Semi-minor axis of confidence ellipse (meter) 11645
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 229
Circular confidence region, given by single value of horizontal uncertainty (meter) 19823.4
Confidence level of the uncertainty (%) 68


Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 131.373
Number of associated phases, regardless of their use for origin computation 22
Number of defining phases 22
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 1.75338
Epicentral distance of station closest to the epicenter (degree) 15.47882
Epicentral distance of station farthest from the epicenter (degree) 80.70024
Number of stations at which the event was observed 22
Number of stations from which data was used for origin computation 22
Magnitudes information


Field Value
Value 5.9
Uncertainty 0.1
Num. used stations 2
Type of magnitude Mwpd
Reference to an origin 85019641
Agency INGV
Autore early-est_ee1.1.9
Time of creation (UTC) 2020-11-25 23:11:15


Field Value
Value 6
Uncertainty 0.1
Num. used stations 6
Type of magnitude Mwp
Reference to an origin 85019641
Agency INGV
Autore early-est_ee1.1.9
Time of creation (UTC) 2020-11-25 23:11:15


Field Value
Value 5.2
Uncertainty 0.1
Num. used stations 16
Type of magnitude mb
Reference to an origin 85019641
Agency INGV
Autore early-est_ee1.1.9
Time of creation (UTC) 2020-11-25 23:11:15
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
GT.BOSA.BHZ.00 2020-11-25T23:08:20.33 10.0 positive automatic pP 223 80.7002 -2.65864 0
AF.ALKP.BHZ. 2020-11-25T23:08:18.97 10.0 positive automatic pP 220 80.3918 -2.32534 0
MY.KUM.BHZ. 2020-11-25T23:08:07.17 10.0 positive automatic P 304 79.1062 -0.519627 0.179171
GT.PLCA.BHZ.00 2020-11-25T23:07:24.00 10.0 negative automatic pP 145 70.7409 -1.8893 0
GE.FAKI.BHZ. 2020-11-25T23:06:20.02 10.0 positive automatic P 334 61.6649 -1.11107 0.370285
G.SANVU.BHZ.00 2020-11-25T23:04:37.00 10.0 positive automatic P 16 47.5313 -1.5414 0.594968
GE.SNAA.BHZ. 2020-11-25T23:04:25.11 10.0 positive automatic P 190 45.2713 -1.93459 0
IU.CTAO.BHZ.00 2020-11-25T23:03:57.60 10.0 positive automatic P 348 42.5387 -1.30015 0.548871
ND.MARNC.BHZ.00 2020-11-25T23:03:51.10 10.0 negative automatic P 18 41.6754 -0.69538 0.682838
AU.MORW.BHZ. 2020-11-25T23:03:51.92 10.0 negative automatic P 304 41.6989 -0.112513 0.723523
AU.EIDS.BHZ. 2020-11-25T23:03:10.15 10.0 positive automatic P 354 36.9167 -1.94325 0.837878
AU.ARMA.BHZ. 2020-11-25T23:02:28.02 10.0 positive automatic P 354 31.8491 -0.351344 0.86148
AU.HTT.BHZ. 2020-11-25T23:02:16.90 10.0 negative automatic P 333 30.5321 0.194092 0.929973
NZ.URZ.HHZ.10 2020-11-25T23:01:51.60 10.0 positive automatic P 40 27.4761 2.15932 0.930233
G.CAN.BHZ.00 2020-11-25T23:01:46.35 10.0 negative automatic P 349 27.1384 -0.161299 0.930233
AU.MILA.BHZ.00 2020-11-25T23:01:30.13 10.0 positive automatic P 349 25.3989 -0.685084 0.91954
NZ.KHZ.HHZ.10 2020-11-25T23:01:04.68 10.0 positive automatic P 38 22.5964 0.821561 0.787402
II.TAU.BHZ.00 2020-11-25T23:00:33.37 10.0 positive automatic P 343 19.8108 -0.503907 0.952381
IU.CASY.BHZ.00 2020-11-25T23:00:32.37 10.0 positive automatic P 238 19.3282 3.78754 0.888889
NZ.ODZ.HHZ.10 2020-11-25T23:00:30.97 10.0 negative automatic P 35 19.3688 1.89811 0.943396
IU.SBA.BHZ.00 2020-11-25T22:59:49.05 10.0 positive automatic P 171 16.0858 -0.541433 0.909091
GT.VNDA.BHZ.00 2020-11-25T22:59:39.75 10.0 positive automatic P 174 15.4788 -1.98324 0.816327
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download