INGVCENTRO​NAZIONALE​TERREMOTI
Sala Sismica

Earthquake with magnitude of Mwp 6.1 on date 31-01-2016 and time 17:39:02 (UTC) in region Balleny Islands region [Sea]

A magnitude Mwp 6.1 earthquake occured in region: Balleny Islands region [Sea], on

  • 31-01-2016 17:39:02 (UTC)
  • 31-01-2016 18:39:02 (UTC +01:00) Italian time
  • 01-02-2016 04:39:02 (UTC +11:00) local time in the region of the earthquake (Antarctica/Macquarie)

and geographic coordinates (lat, lon) -63.23, 169.44 at 1 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
The earthquake effects in MCS scale as obtained from the compiled questionnaire

The earthquake effects in MCS scale as obtained from the compiled 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
Rev 100 mb 5.5
Mwp 6.1

Mwpd 6.4
2016-01-31
17:39:02
-63.23 169.44 1 2016-01-31
18:00:09
Sala Sismica INGV-Roma 23320671
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2016-01-31 17:39:02
Latitude -63.23
Longitude 169.44
Depth (km) 1 (from location)
Evaluation mode of Origin automatic
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV-A
Event type earthquake
Origin ID 23320671

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 28418
Semi-minor axis of confidence ellipse (meter) 1946
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 91
Circular confidence region, given by single value of horizontal uncertainty (meter) 22947.7
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 113.475
Number of associated phases, regardless of their use for origin computation 30
Number of defining phases 30
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 1.43776
Epicentral distance of station closest to the epicenter (degree) 14.48096
Epicentral distance of station farthest from the epicenter (degree) 85.41064
Number of stations at which the event was observed 28
Number of stations from which data was used for origin computation 28
Magnitudes information

Mwpd:6.4

Field Value
Value 6.4
Uncertainty 0.3
Num. used stations 13
Type of magnitude Mwpd
Reference to an origin 23320671
Agency INGV
Autore Auto added
Time of creation (UTC) 2016-01-31 18:00:10

Mwp:6.1

Field Value
Value 6.1
Uncertainty 0.2
Num. used stations 16
Type of magnitude Mwp
Reference to an origin 23320671
Agency INGV
Autore Auto added
Time of creation (UTC) 2016-01-31 18:00:10

mb:5.5

Field Value
Value 5.5
Uncertainty 0.3
Num. used stations 22
Type of magnitude mb
Reference to an origin 23320671
Agency INGV
Autore Auto added
Time of creation (UTC) 2016-01-31 18:00:10
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
MY.KUM.BHZ. 2016-01-31T17:51:38.47 10.0 negative automatic P 291 85.4106 -1.01239 0.112127
GT.BOSA.BHZ.00 2016-01-31T17:51:30.88 10.0 positive automatic P 211 83.8543 -0.949345 0.142572
GT.CPUP.BHZ.00 2016-01-31T17:51:27.35 10.0 negative automatic P 139 83.1312 -0.553901 0.146994
GE.LVC.BHZ.00 2016-01-31T17:51:29.57 10.0 positive automatic P 128 82.8035 2.88204 0.146327
GE.GSI.BHZ. 2016-01-31T17:51:28.92 10.0 positive automatic P 287 83.1122 1.11209 0.13436
II.SUR.BHZ.00 2016-01-31T17:51:17.72 10.0 negative automatic P 206 81.1722 -0.195585 0.156761
MY.LDM.BHZ. 2016-01-31T17:51:07.07 10.0 positive automatic P 308 78.3381 4.81077 0.190845
MY.SBM.BHZ. 2016-01-31T17:51:02.77 10.0 negative automatic P 301 78.1442 1.57719 0.179891
IU.LCO.BHZ.00 2016-01-31T17:50:51.97 10.0 negative automatic P 129 76.2937 0.81414 0.211288
GT.PLCA.BHZ.00 2016-01-31T17:49:47.93 10.0 positive automatic P 134 65.6729 1.46747 0.308515
GE.SOEI.BHZ. 2016-01-31T17:49:27.87 10.0 positive automatic P 308 62.3378 3.35248 0.361409
AU.KDU.BHZ. 2016-01-31T17:48:45.72 10.0 positive automatic P 316 56.825 -0.590204 0
GE.PMG.BHZ.00 2016-01-31T17:48:41.57 10.0 positive automatic P 333 56.1417 0.122918 0.437214
AU.COEN.BHZ. 2016-01-31T17:48:15.32 10.0 positive automatic P 327 52.6017 -0.397118 0.50023
II.WRAB.BHZ.00 2016-01-31T17:47:52.07 10.0 positive automatic P 315 49.3885 0.518584 0.563799
G.SANVU.BHZ.00 2016-01-31T17:47:37.75 10.0 positive automatic P 357 47.8083 -1.57903 0.488101
AU.WRKA.BHZ. 2016-01-31T17:47:30.02 10.0 positive automatic P 305 46.7492 -1.14774 0.630325
IU.CTAO.BHZ.00 2016-01-31T17:47:25.07 10.0 positive automatic P 329 45.9319 0.369845 0.622472
GE.SNAA.BHZ. 2016-01-31T17:47:16.21 10.0 positive automatic P 183 44.9912 -1.11091 0.638941
ND.KOUNC.BHZ.00 2016-01-31T17:46:57.59 10.0 negative automatic P 353 42.8231 -2.17476 0.677719
G.DZM.BHZ.00 2016-01-31T17:46:45.85 10.0 positive automatic P 356 41.2081 -0.854626 0.608319
AU.EIDS.BHZ. 2016-01-31T17:46:34.90 10.0 positive automatic P 334 39.7539 0.336517 0.734567
NZ.URZ.HHZ.10 2016-01-31T17:44:29.08 10.0 positive automatic P 14 25.3964 -0.112882 0.961538
IU.SNZO.BHZ.00 2016-01-31T17:43:56.32 10.0 positive automatic P 11 22.1406 -1.06743 0.43956
NZ.KHZ.HHZ.10 2016-01-31T17:43:45.59 10.0 positive automatic P 8 20.9521 0.987997 0.952381
NZ.ODZ.HHZ.10 2016-01-31T17:43:14.46 10.0 negative automatic P 3 18.2002 0.20284 0.980392
IU.SBA.BHZ.00 2016-01-31T17:42:28.15 10.0 positive automatic P 182 14.6401 -0.363715 0.963855
GT.VNDA.BHZ.00 2016-01-31T17:42:26.20 10.0 positive automatic P 187 14.481 -0.152601 0.930233
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download