Earthquake with magnitude of Mwp 6.1 on date 24-10-2021 and time 07:11:35 (Italy) in region Taiwan [Sea]

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

  • 24-10-2021 05:11:35 (UTC)
  • 24-10-2021 07:11:35 (UTC +02:00) Italian time
  • 24-10-2021 13:11:35 (UTC +08:00) local time in the region of the earthquake (Asia/Taipei)

and geographic coordinates (lat, lon) 24.451, 121.973 at 77 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 5.6
Mwp 6.1

Mwpd 6.1
2021-10-24
05:11:35
24.4512 121.973 77 2021-10-24
05:25:57
Sala Sismica INGV-Roma 96929781
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-24 05:11:35
Latitude 24.4512
Longitude 121.9730
Depth (km) 77 (from location)
Evaluation mode of Origin automatic
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV-A
Event type earthquake
Origin ID 96929781

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 6569
Semi-minor axis of confidence ellipse (meter) 3018
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 127
Circular confidence region, given by single value of horizontal uncertainty (meter) 5309.4
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 23.0457
Number of associated phases, regardless of their use for origin computation 93
Number of defining phases 93
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 1.80141
Epicentral distance of station closest to the epicenter (degree) 0.67805
Epicentral distance of station farthest from the epicenter (degree) 69.73483
Number of stations at which the event was observed 84
Number of stations from which data was used for origin computation 84
Magnitudes information

Mwpd:6.1

Field Value
Value 6.1
Uncertainty 0.2
Num. used stations 32
Type of magnitude Mwpd
Reference to an origin 96929781
Agency INGV
Autore early-est_ee1.1.9
Time of creation (UTC) 2021-10-24 05:25:57

Mwp:6.1

Field Value
Value 6.1
Uncertainty 0.1
Num. used stations 43
Type of magnitude Mwp
Reference to an origin 96929781
Agency INGV
Autore early-est_ee1.1.9
Time of creation (UTC) 2021-10-24 05:25:57

mb:5.6

Field Value
Value 5.6
Uncertainty 0.2
Num. used stations 59
Type of magnitude mb
Reference to an origin 96929781
Agency INGV
Autore early-est_ee1.1.9
Time of creation (UTC) 2021-10-24 05:25:57
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
GE.KBS.BHZ.00 2021-10-24T05:22:36.77 10.0 negative automatic P 349 69.7348 0.640312 0
IU.KEV.BHZ.00 2021-10-24T05:22:31.12 10.0 negative automatic P 338 68.8314 0.565207 0.28127
IU.COLA.BHZ.00 2021-10-24T05:22:26.70 10.0 positive automatic P 27 68.057 0.949819 0.307779
AU.LHI.BHZ.00 2021-10-24T05:22:16.43 10.0 negative automatic P 146 66.2544 2.108 0
AU.TOO.BHZ.00 2021-10-24T05:22:11.63 10.0 positive automatic P 160 65.8429 -0.143139 0.331963
AT.TTA.BHZ. 2021-10-24T05:22:06.30 10.0 positive automatic P 30 64.7756 1.36106 0.352536
IU.GNI.BHZ.00 2021-10-24T05:22:08.52 10.0 positive automatic P 305 65.1209 1.23123 0.341307
G.CAN.BHZ.00 2021-10-24T05:22:06.65 10.0 positive automatic P 156 65.0121 0.223654 0.327147
IU.JOHN.BHZ.00 2021-10-24T05:22:02.25 10.0 positive automatic P 83 63.9757 2.69797 0.344105
ND.ONTNC.BHZ.00 2021-10-24T05:21:59.05 10.0 positive automatic P 134 63.6522 1.61049 0.34432
AU.ARMA.BHZ. 2021-10-24T05:21:46.55 10.0 positive automatic P 151 61.7933 1.2847 0
ND.KOUNC.BHZ.00 2021-10-24T05:21:41.60 10.0 positive automatic P 134 60.9836 1.97309 0.379294
AT.AKUT.BHZ. 2021-10-24T05:21:35.26 10.0 positive automatic P 40 60.1304 1.44907 0.387311
AU.HTT.BHZ. 2021-10-24T05:21:32.87 10.0 positive automatic P 164 60.0853 -0.751139 0.405264
II.UOSS.BHZ.00 2021-10-24T05:21:27.57 10.0 negative automatic P 286 59.1117 0.716576 0.106028
AU.EIDS.BHZ. 2021-10-24T05:21:14.10 10.0 positive automatic P 148 57.2252 0.41315 0.446644
IU.NWAO.BHZ.00 2021-10-24T05:21:14.10 10.0 positive automatic P 185 57.5535 -1.92396 0.457955
AU.KDU.BHZ.00 2021-10-24T05:18:47.20 10.0 positive automatic P 163 38.5255 -2.09175 0.76677
AU.FORT.BHZ.00 2021-10-24T05:21:00.20 10.0 positive automatic P 174 55.5346 -1.45872 0.483426
AU.QLP.BHZ. 2021-10-24T05:21:00.10 10.0 positive automatic P 156 55.3751 -0.428735 0.468968
II.ARTI.BHZ.00 2021-10-24T05:20:59.67 10.0 negative automatic P 323 55.3264 -0.52225 0.469703
IU.TARA.BHZ.00 2021-10-24T05:20:55.85 10.0 positive automatic P 107 54.3269 2.92082 0.479352
IU.MIDW.BHZ.00 2021-10-24T05:20:52.62 10.0 positive automatic P 72 53.9274 2.60229 0.491078
AU.MORW.BHZ. 2021-10-24T05:20:46.67 10.0 positive automatic P 186 53.8198 -2.60951 0.432407
IU.ADK.BHZ.00 2021-10-24T05:20:46.72 10.0 positive automatic P 42 53.476 -0.021358 0.419947
IU.BILL.BHZ.00 2021-10-24T05:20:29.22 10.0 positive automatic P 20 51.1997 -0.704183 0.54684
IU.CTAO.BHZ.00 2021-10-24T05:20:25.22 10.0 positive automatic P 150 50.419 1.1477 0.573448
JP.JTM.BHZ. 2021-10-24T05:16:26.90 10.0 positive automatic P 40 22.8219 -3.98082 0.43956
AU.WRKA.BHZ.00 2021-10-24T05:20:18.30 10.0 positive automatic P 173 49.8635 -1.61708 0.569105
AT.SMY.BHZ. 2021-10-24T05:20:07.64 10.0 positive automatic P 40 48.101 1.28889 0.206944
AU.GIRL.BHZ.00 2021-10-24T05:20:02.03 10.0 positive automatic P 190 47.6878 -1.14301 0.578748
IU.TIXI.BHZ.00 2021-10-24T05:19:59.32 10.0 negative automatic P 3 47.3426 -1.16331 0.598078
II.SIMI.BHZ.00 2021-10-24T05:19:55.80 10.0 negative automatic P 301 46.6287 0.876737 0.603296
II.WRAB.BHZ.00 2021-10-24T05:19:48.85 10.0 positive automatic P 164 45.9917 -1.14349 0.643791
IU.MBWA.BHZ.00 2021-10-24T05:19:44.80 10.0 positive automatic P 183 45.6602 -2.55436 0.657697
GE.HALK.BHZ. 2021-10-24T05:19:33.00 10.0 negative automatic P 252 43.612 1.96253 0.648299
II.AAK.BHZ.00 2021-10-24T05:19:26.32 10.0 negative automatic P 307 42.8614 1.06385 0.693039
GE.MALK.BHZ. 2021-10-24T05:19:24.97 10.0 negative automatic P 255 42.6365 1.79746 0.697221
AU.FITZ.BHZ. 2021-10-24T05:19:21.25 10.0 positive automatic P 175 42.7011 -2.44444 0.687831
II.KURK.BHZ.00 2021-10-24T05:19:19.00 10.0 negative automatic P 320 42.3101 -0.546129 0.642156
IU.WAKE.BHZ.00 2021-10-24T05:19:17.45 10.0 positive automatic P 88 41.6098 2.63865 0.691772
AU.RABL.BHZ.00 2021-10-24T05:19:13.20 10.0 positive automatic P 130 41.0181 3.19089 0.719132
IU.MA2.BHZ.00 2021-10-24T05:19:05.57 10.0 positive automatic P 22 40.455 0.187085 0.721274
IU.PET.BHZ.00 2021-10-24T05:18:57.22 10.0 positive automatic P 34 39.6614 -1.55825 0.688198
IU.MAKZ.BHZ.00 2021-10-24T05:18:51.70 10.0 negative automatic P 315 38.8208 -0.165879 0.710867
AU.MTN.BHZ.00 2021-10-24T05:18:45.50 10.0 positive automatic P 166 38.3505 -2.33913 0.770171
IU.YAK.BHZ.00 2021-10-24T05:18:42.77 10.0 positive automatic P 6 37.939 -1.60698 0.769151
GE.MNAI.BHZ. 2021-10-24T05:18:13.47 10.0 positive automatic P 215 34.2406 0.639853 0.842322
GE.JAGI.BHZ. 2021-10-24T05:18:08.32 10.0 positive automatic P 194 33.7926 -0.631664 0.832061
GE.GSI.BHZ. 2021-10-24T05:18:02.17 10.0 positive automatic P 229 33.045 -0.270649 0.887322
IO.EVN.BHZ. 2021-10-24T05:17:51.75 10.0 negative automatic P 284 31.6332 0.817862 0.917237
GE.LHMI.BHZ. 2021-10-24T05:17:43.77 10.0 positive automatic P 235 30.7784 1.22002 0.935588
II.TLY.BHZ.00 2021-10-24T05:17:40.77 10.0 negative automatic P 337 30.621 -0.492994 0.896309
II.KAPI.BHZ.00 2021-10-24T05:17:30.25 10.0 positive automatic P 184 29.5434 -1.44678 0.869565
GE.FAKI.BHZ. 2021-10-24T05:17:27.67 10.0 positive automatic P 159 29.1342 -0.370973 0.909091
MY.IPM.BHZ. 2021-10-24T05:17:21.42 10.0 positive automatic P 229 28.3707 0.1324 0.816327
IU.YSS.BHZ.00 2021-10-24T05:17:16.15 10.0 positive automatic P 31 27.9454 -1.33461 0.909091
IN.SHL.HHZ. 2021-10-24T05:17:12.04 10.0 negative automatic P 279 27.2569 0.729005 0.888889
GE.SANI.BHZ. 2021-10-24T05:17:04.77 10.0 positive automatic P 171 26.7848 -2.31379 0.930233
GE.BKB.BHZ. 2021-10-24T05:17:01.87 10.0 positive automatic P 192 26.026 1.60641 0.930233
IU.ULN.BHZ.00 2021-10-24T05:17:01.97 10.0 negative automatic P 337 26.2234 -0.332833 0.952381
JP.JKA.BHZ. 2021-10-24T05:16:56.80 10.0 positive automatic pP 41 23.9275 -1.80548 0
GE.LUWI.BHZ. 2021-10-24T05:16:52.82 10.0 positive automatic P 178 25.5036 -2.70477 0
II.ERM.BHZ.00 2021-10-24T05:16:47.17 10.0 positive automatic P 40 24.8126 -2.09212 0.909091
GE.TNTI.BHZ. 2021-10-24T05:16:43.97 10.0 positive automatic P 167 24.2468 -0.144459 0.930233
MY.SBM.BHZ. 2021-10-24T05:16:38.82 10.0 positive automatic P 205 23.93 -2.4415 0.952381
IU.CHTO.BHZ.00 2021-10-24T05:16:24.45 10.0 negative automatic P 260 22.104 1.09047 0.941176
MY.LDM.BHZ. 2021-10-24T05:15:58.17 10.0 positive automatic P 190 19.5599 2.1944 0.869565
JP.JCJ.BHZ. 2021-10-24T05:15:45.20 10.0 positive automatic P 77 18.3706 2.2231 0.909091
IU.MAJO.BHZ.00 2021-10-24T05:15:42.57 10.0 positive automatic P 45 18.4394 -1.20549 0.909091
RM.DLV.BHZ. 2021-10-24T05:15:40.47 10.0 positive automatic P 228 17.8752 2.75289 0.869565
JP.JHJ2.BHZ. 2021-10-24T05:15:38.15 10.0 positive automatic P 57 17.8378 1.04032 0.43956
JP.JSG.BHZ. 2021-10-24T05:15:30.40 10.0 positive automatic P 50 17.3776 -1.40838 0.43956
JP.JGF.BHZ. 2021-10-24T05:15:29.05 10.0 positive automatic P 46 17.3292 -2.24384 0.43956
RM.SLV.BHZ. 2021-10-24T05:15:26.62 10.0 negative automatic P 263 16.9208 0.334824 0.869565
G.INU.BHZ.00 2021-10-24T05:15:24.41 10.0 positive automatic P 47 16.9659 -2.34228 0.43956
IU.INCN.BHZ.00 2021-10-24T05:14:46.02 10.0 positive automatic P 16 13.6175 1.92553 0.909091
JP.JMN.BHZ. 2021-10-24T05:14:44.40 10.0 positive automatic P 45 13.9195 -3.74182 0.888889
JP.JTU.BHZ. 2021-10-24T05:14:23.65 10.0 positive automatic P 31 11.9602 1.77693 0.43956
JP.JSU.BHZ. 2021-10-24T05:14:01.30 10.0 positive automatic P 45 10.2825 2.22629 0.952381
JP.JMZ.BHZ. 2021-10-24T05:13:34.10 10.0 positive automatic P 79 8.4834 -0.366996 0.909091
JP.JOW.BHZ. 2021-10-24T05:13:04.15 10.0 positive automatic P 66 6.158 1.40313 0.930233
JP.YOJ.BHZ. 2021-10-24T05:11:54.40 10.0 negative automatic P 89 0.9451 1.78445 0.97561
IU.TATO.BHZ.00 2021-10-24T05:11:46.72 10.0 positive automatic P 320 0.678 -2.90138 0.97561
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