Earthquake with magnitude of Mwp 6.1 on date 07-10-2021 and time 20:13:06 (UTC) in region Macquarie Island, Australia, region [Sea]

A magnitude Mwp 6.1 earthquake occured in region: Macquarie Island, Australia, region [Sea], on

  • 07-10-2021 20:13:06 (UTC)
  • 07-10-2021 22:13:06 (UTC +02:00) Italian time
  • 08-10-2021 07:13:06 (UTC +11:00) local time in the region of the earthquake (Antarctica/Macquarie)

and geographic coordinates (lat, lon) -58.718, 158.138 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 5.2
Mwp 6.1

Mwpd 6.2
2021-10-07
20:13:06
-58.718 158.138 20 2021-10-07
20:34:23
Sala Sismica INGV-Roma 96332471
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-07 20:13:06
Latitude -58.7180
Longitude 158.1380
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 96332471

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 16874
Semi-minor axis of confidence ellipse (meter) 4068
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 94
Circular confidence region, given by single value of horizontal uncertainty (meter) 13626.1
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 96.5824
Number of associated phases, regardless of their use for origin computation 58
Number of defining phases 58
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 1.58697
Epicentral distance of station closest to the epicenter (degree) 4.24305
Epicentral distance of station farthest from the epicenter (degree) 96.69924
Number of stations at which the event was observed 51
Number of stations from which data was used for origin computation 51
Magnitudes information

Mwpd:6.2

Field Value
Value 6.2
Uncertainty 0.1
Num. used stations 24
Type of magnitude Mwpd
Reference to an origin 96332471
Agency INGV
Autore early-est_ee1.1.9
Time of creation (UTC) 2021-10-07 20:34:23

Mwp:6.1

Field Value
Value 6.1
Uncertainty 0.1
Num. used stations 27
Type of magnitude Mwp
Reference to an origin 96332471
Agency INGV
Autore early-est_ee1.1.9
Time of creation (UTC) 2021-10-07 20:34:23

mb:5.2

Field Value
Value 5.2
Uncertainty 0.2
Num. used stations 33
Type of magnitude mb
Reference to an origin 96332471
Agency INGV
Autore early-est_ee1.1.9
Time of creation (UTC) 2021-10-07 20:34:23
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IU.MAJO.BHZ.00 2021-10-07T20:26:30.82 10.0 positive automatic P 344 96.6992 -2.68913 0
GT.LPAZ.BHZ.00 2021-10-07T20:26:29.75 10.0 negative automatic P 136 96.0143 -1.40706 0
JP.JGF.BHZ. 2021-10-07T20:26:28.00 10.0 positive automatic P 343 95.8982 -1.89552 0
IU.TSUM.BHZ.00 2021-10-07T20:26:27.67 10.0 positive automatic P 217 95.5958 -0.970512 0
G.INU.BHZ.00 2021-10-07T20:26:26.66 10.0 positive automatic P 343 95.6981 -2.24637 0
JP.JMN.BHZ. 2021-10-07T20:26:22.30 10.0 positive automatic P 340 94.6349 -1.81885 0.0506076
GE.WIN.BHZ. 2021-10-07T20:26:14.35 10.0 positive automatic P 216 92.5678 -0.465918 0.073844
IU.CHTO.BHZ.00 2021-10-07T20:26:07.22 10.0 positive automatic P 306 91.3652 -1.8048 0.0850021
CX.MNMCX.BHZ. 2021-10-07T20:26:04.00 10.0 negative automatic PcP 136 92.8541 -12.8867 0
JP.JOW.BHZ. 2021-10-07T20:25:56.50 10.0 positive automatic P 334 89.08 -1.83599 0.0463912
AF.ALKP.BHZ. 2021-10-07T20:25:34.13 10.0 positive automatic P 217 84.0563 0.21136 0.139183
GT.BOSA.BHZ.00 2021-10-07T20:25:34.50 10.0 positive automatic P 220 84.3094 -0.740125 0.10374
C1.CO02.BHZ. 2021-10-07T20:25:17.85 10.0 positive automatic P 139 81.2421 -1.44118 0.163588
C1.BO02.BHZ. 2021-10-07T20:25:00.62 10.0 positive automatic P 141 78.0242 -1.13242 0.19391
GE.GSI.BHZ. 2021-10-07T20:24:52.12 10.0 positive automatic P 296 76.3646 -0.182009 0.192245
C.GO06.BHZ. 2021-10-07T20:24:34.30 10.0 positive automatic P 142 73.4225 -1.19211 0.233411
GT.PLCA.BHZ.00 2021-10-07T20:24:29.65 10.0 negative automatic P 143 72.664 -1.32264 0.241512
MY.LDM.BHZ. 2021-10-07T20:24:22.12 10.0 positive automatic P 318 71.2673 -0.325414 0.227968
MY.SBM.BHZ. 2021-10-07T20:24:20.07 10.0 positive automatic P 311 71.0743 -1.21835 0.250309
C1.LL02.BHZ. 2021-10-07T20:24:13.93 10.0 positive automatic P 144 70.0278 -1.00164 0.273892
GE.SANI.BHZ. 2021-10-07T20:23:20.52 10.0 positive automatic P 323 61.9687 -2.52875 0.358113
II.KAPI.BHZ.00 2021-10-07T20:23:16.67 10.0 positive automatic P 315 61.3021 -1.93025 0.242709
GE.FAKI.BHZ. 2021-10-07T20:23:03.82 10.0 positive automatic P 330 59.3297 -1.26183 0.401886
GE.MMRI.BHZ. 2021-10-07T20:22:48.12 10.0 positive automatic P 316 57.0297 -0.868203 0.398101
GE.SOEI.BHZ. 2021-10-07T20:22:37.02 10.0 positive automatic P 318 55.2679 0.467455 0.413031
IU.QSPA.BHZ.00 2021-10-07T20:19:22.52 10.0 positive automatic P 180 31.2116 -0.430868 0.926373
AU.MTN.BHZ.00 2021-10-07T20:21:57.10 10.0 positive automatic P 325 50.1289 -1.28486 0.456129
AU.KDU.BHZ.00 2021-10-07T20:21:54.93 10.0 positive automatic P 326 49.8854 -1.59459 0.262533
GE.SNAA.BHZ. 2021-10-07T20:21:48.31 10.0 positive automatic P 188 48.9348 -1.09112 0.54593
IU.MBWA.BHZ.00 2021-10-07T20:21:29.85 10.0 positive automatic P 307 46.5302 -0.794893 0.438668
AU.MCQ.BHZ.00 2021-10-07T20:14:04.10 10.0 negative automatic P 6 4.2431 -3.90084 0.963855
II.WRAB.BHZ.00 2021-10-07T20:20:56.20 10.0 positive automatic P 326 42.4306 -1.71047 0.692905
AU.MORW.BHZ. 2021-10-07T20:20:48.10 10.0 positive automatic P 297 41.2368 -0.0378656 0.660707
AU.MAW.BHZ. 2021-10-07T20:20:34.50 10.0 negative automatic P 217 39.4646 1.0923 0.757652
AU.WRKA.BHZ.00 2021-10-07T20:20:34.68 10.0 positive automatic P 315 39.6658 -0.517754 0.772134
IU.CTAO.BHZ.00 2021-10-07T20:20:33.92 10.0 positive automatic P 342 39.5775 -0.49238 0.634588
ND.KOUNC.BHZ.00 2021-10-07T20:20:24.65 10.0 positive automatic P 9 38.4241 -0.0571735 0.68074
IU.NWAO.BHZ.00 2021-10-07T20:20:16.92 10.0 positive automatic P 295 37.4385 0.478567 0.807112
AU.FORT.BHZ.00 2021-10-07T20:19:52.98 10.0 positive automatic P 311 34.5748 1.08824 0.855571
AU.EIDS.BHZ. 2021-10-07T20:19:44.32 10.0 positive automatic P 348 33.7159 -0.124071 0.666947
AU.QLP.BHZ. 2021-10-07T20:19:42.00 10.0 positive automatic P 337 33.5696 -0.175007 0.766882
AU.HTT.BHZ. 2021-10-07T20:18:58.80 10.0 positive automatic P 325 28.3526 1.52943 0.952381
G.CAN.BHZ.00 2021-10-07T20:18:20.20 10.0 positive automatic P 342 24.1628 0.77289 0.952381
NZ.URZ.HHZ.10 2021-10-07T20:18:19.08 10.0 positive automatic P 39 23.8237 2.85112 0.930233
IU.CASY.BHZ.00 2021-10-07T20:18:05.87 10.0 positive automatic P 231 22.5909 2.19003 0.952381
AU.TOO.BHZ.00 2021-10-07T20:18:04.70 10.0 positive automatic P 333 22.6787 -0.0129319 0.869565
AU.MILA.BHZ.00 2021-10-07T20:18:03.48 10.0 positive automatic P 341 22.438 1.28341 0.97561
NZ.KHZ.HHZ.10 2021-10-07T20:17:25.56 10.0 positive automatic P 37 18.909 1.66986 0.847458
GT.VNDA.BHZ.00 2021-10-07T20:17:21.40 10.0 positive automatic P 178 18.8404 -1.74654 0.465116
II.TAU.BHZ.00 2021-10-07T20:17:04.72 10.0 negative automatic P 332 17.1715 1.48404 0.930233
NZ.ODZ.HHZ.10 2021-10-07T20:16:44.10 10.0 negative automatic P 35 15.6444 0.287399 0.956938
AU.MCQ.BHZ.00 2021-10-07T20:14:58.08 10.0 negative automatic S 6 4.2431 2.32652 0
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