Earthquake with magnitude of Mwp 6.2 on date 18-04-2021 and time 14:14:39 (UTC) in region Taiwan

A magnitude Mwp 6.2 earthquake occured in region: Taiwan, on

  • 18-04-2021 14:14:39 (UTC)
  • 18-04-2021 16:14:39 (UTC +02:00) Italian time
  • 18-04-2021 22:14:39 (UTC +08:00) local time in the region of the earthquake (Asia/Taipei)

and geographic coordinates (lat, lon) 23.688, 121.465 at 18 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 5.4
Mwp 6.2

Mwpd 6.2
2021-04-18
14:14:39
23.6883 121.465 18 2021-04-18
14:30:33
Sala Sismica INGV-Roma 89213081
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-04-18 14:14:39
Latitude 23.6883
Longitude 121.4650
Depth (km) 18 (from location)
Evaluation mode of Origin automatic
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV-A
Event type earthquake
Origin ID 89213081

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 22391
Semi-minor axis of confidence ellipse (meter) 11723
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 150
Circular confidence region, given by single value of horizontal uncertainty (meter) 18080
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 35.0424
Number of associated phases, regardless of their use for origin computation 92
Number of defining phases 92
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 2.43887
Epicentral distance of station closest to the epicenter (degree) 1.28549
Epicentral distance of station farthest from the epicenter (degree) 76.84591
Number of stations at which the event was observed 85
Number of stations from which data was used for origin computation 85
Magnitudes information

Mwp:6.2

Field Value
Value 6.2
Uncertainty 0.1
Num. used stations 33
Type of magnitude Mwp
Reference to an origin 89213081
Agency INGV
Autore early-est_ee1.1.9
Time of creation (UTC) 2021-04-18 14:30:33

Mwpd:6.2

Field Value
Value 6.2
Uncertainty 0.1
Num. used stations 26
Type of magnitude Mwpd
Reference to an origin 89213081
Agency INGV
Autore early-est_ee1.1.9
Time of creation (UTC) 2021-04-18 14:30:33

mb:5.4

Field Value
Value 5.4
Uncertainty 0.1
Num. used stations 57
Type of magnitude mb
Reference to an origin 89213081
Agency INGV
Autore early-est_ee1.1.9
Time of creation (UTC) 2021-04-18 14:30:33
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
GE.ISP.BHZ.00 2021-04-18T14:26:33.60 10.0 positive automatic P 306 76.4391 7.18612 0.200257
NZ.OUZ.HHZ.10 2021-04-18T14:26:32.62 10.0 positive automatic P 139 76.8459 4.08543 0.191947
GE.DAG.BHZ. 2021-04-18T14:26:32.11 10.0 positive automatic pP 351 76.6826 -1.42133 0
GE.EIL.BHZ. 2021-04-18T14:26:29.40 10.0 positive automatic P 296 75.6814 7.45231 0.2031
GE.TIRR.BHZ. 2021-04-18T14:26:29.90 10.0 positive automatic P 313 75.7211 7.74288 0.212143
IS.AMAZ.BHZ. 2021-04-18T14:26:27.84 10.0 negative automatic sP 298 75.0992 2.32982 0
GE.TIRR.BHZ. 2021-04-18T14:26:26.35 10.0 positive automatic pP 313 75.7211 -1.71945 0
IS.AMAZ.BHZ. 2021-04-18T14:26:20.14 10.0 positive automatic P 298 75.0992 1.50272 0.16778
GE.CSS.BHZ. 2021-04-18T14:26:20.50 10.0 positive automatic P 302 75.2435 1.03395 0.212088
GE.MSBI.BHZ. 2021-04-18T14:26:18.85 10.0 positive automatic P 298 74.8129 1.97396 0.179679
GE.SALP.BHZ. 2021-04-18T14:26:17.92 10.0 positive automatic P 299 74.7043 1.55337 0
IU.ANTO.BHZ.00 2021-04-18T14:26:14.02 10.0 positive automatic P 307 74.1042 1.03745 0.23157
IS.GEM.BHZ. 2021-04-18T14:26:13.88 10.0 positive automatic P 300 73.9667 1.84302 0.210728
G.KIP.BHZ.00 2021-04-18T14:26:10.67 10.0 positive automatic P 73 73.3139 2.49894 0.224252
IU.KIEV.BHZ.00 2021-04-18T14:26:07.22 10.0 positive automatic P 319 73.2449 -0.555923 0.217773
KO.BNN.BHZ. 2021-04-18T14:26:02.64 10.0 positive automatic P 305 72.147 1.18025 0.213282
GE.VSU.BHZ. 2021-04-18T14:26:01.40 10.0 positive automatic P 327 72.3638 -1.13705 0.212938
KO.GAZ.BHZ. 2021-04-18T14:25:59.54 10.0 positive automatic P 303 71.5883 0.419165 0.136335
KO.SNOP.BHZ. 2021-04-18T14:26:00.34 10.0 negative automatic P 309 71.7367 1.549 0
II.MSVF.BHZ.00 2021-04-18T14:25:48.62 10.0 positive automatic pP 122 69.0305 0.403806 0
II.MSVF.BHZ.00 2021-04-18T14:25:43.72 10.0 negative automatic P 122 69.0305 1.36463 0.255778
IU.COLA.BHZ.00 2021-04-18T14:25:41.10 10.0 positive automatic P 27 68.9476 -0.642905 0.241556
II.KDAK.BHZ.00 2021-04-18T14:25:35.22 10.0 positive automatic P 35 68.0117 -0.658245 0.30115
II.KIV.BHZ.00 2021-04-18T14:25:24.27 10.0 positive automatic P 309 65.9713 1.20736 0.266844
AU.MILA.BHZ.00 2021-04-18T14:25:23.35 10.0 negative automatic P 156 66.1041 -0.517454 0.300097
IU.GNI.BHZ.00 2021-04-18T14:25:19.97 10.0 positive automatic P 305 65.176 1.95205 0.157225
AU.ARMA.BHZ. 2021-04-18T14:24:52.95 10.0 positive automatic P 150 61.3547 0.336275 0.401789
ND.KOUNC.BHZ.00 2021-04-18T14:24:48.30 10.0 positive automatic P 133 60.7945 -0.332488 0.258518
AK.TNA.BHZ. 2021-04-18T14:24:46.25 10.0 positive automatic P 27 60.5544 -0.740405 0.41535
G.SANVU.BHZ.00 2021-04-18T14:24:39.50 10.0 positive automatic P 127 59.3979 0.450964 0.430283
AU.HTT.BHZ. 2021-04-18T14:24:38.72 10.0 positive automatic P 163 59.4867 -1.05501 0.395229
II.UOSS.BHZ.00 2021-04-18T14:24:36.82 10.0 positive automatic P 286 58.8713 1.38426 0
AK.GAMB.BHZ. 2021-04-18T14:24:33.37 10.0 positive automatic P 28 58.6911 -0.766567 0.430317
AU.EIDS.BHZ. 2021-04-18T14:24:21.20 10.0 positive automatic P 148 56.8225 0.155159 0.463615
IU.NWAO.BHZ.00 2021-04-18T14:24:18.90 10.0 positive automatic P 184 56.7568 -1.70625 0.453688
II.ARTI.BHZ.00 2021-04-18T14:24:12.22 10.0 positive automatic P 323 55.6579 -0.525158 0.475848
AK.ATKA.BHZ. 2021-04-18T14:24:12.63 10.0 positive automatic P 42 55.9059 -1.84675 0.16304
AU.FORT.BHZ.00 2021-04-18T14:24:05.43 10.0 positive automatic P 173 54.8305 -1.3252 0.482916
AU.QLP.BHZ. 2021-04-18T14:24:05.00 10.0 negative automatic P 155 54.8755 -1.08763 0.493843
IU.ADK.BHZ.00 2021-04-18T14:24:02.62 10.0 positive automatic P 42 54.3528 -0.658776 0.479034
AU.MORW.BHZ. 2021-04-18T14:23:51.20 10.0 positive automatic P 186 53.0114 -2.28124 0.517444
IU.HNR.BHZ.00 2021-04-18T14:23:31.87 10.0 positive automatic P 127 50.1126 0.108394 0
IU.CTAO.BHZ.00 2021-04-18T14:23:30.65 10.0 positive automatic P 149 49.9973 -0.286392 0.553755
AU.WRKA.BHZ.00 2021-04-18T14:23:23.33 10.0 positive automatic P 172 49.1711 -1.35823 0.567391
IU.TIXI.BHZ.00 2021-04-18T14:23:13.62 10.0 positive automatic P 3 48.129 -2.94691 0.52391
AU.GIRL.BHZ.00 2021-04-18T14:23:05.95 10.0 negative automatic P 189 46.8593 -0.75735 0.628352
II.WRAB.BHZ.00 2021-04-18T14:22:52.82 10.0 positive automatic P 163 45.3945 -2.39547 0.646886
IU.MBWA.BHZ.00 2021-04-18T14:22:48.65 10.0 negative automatic P 182 44.877 -2.43059 0.664108
II.AAK.BHZ.00 2021-04-18T14:22:37.72 10.0 positive automatic P 308 42.958 1.81221 0.691338
II.KURK.BHZ.00 2021-04-18T14:22:32.67 10.0 positive automatic P 320 42.5983 -0.0721677 0.598307
GE.MALK.BHZ. 2021-04-18T14:22:30.82 10.0 positive automatic P 256 41.9945 3.01046 0.607991
AU.FITZ.BHZ. 2021-04-18T14:22:26.45 10.0 positive automatic P 174 41.9865 -1.29311 0
AU.RABL.BHZ.00 2021-04-18T14:22:20.93 10.0 positive automatic P 129 40.89 2.14868 0.705046
IU.MA2.BHZ.00 2021-04-18T14:22:19.77 10.0 positive automatic P 22 41.3363 -2.68971 0.594378
IU.PET.BHZ.00 2021-04-18T14:22:13.62 10.0 positive automatic P 34 40.5531 -2.34725 0.687552
IU.MAKZ.BHZ.00 2021-04-18T14:22:03.95 10.0 positive automatic P 316 39.0452 0.43532 0.618544
IU.YAK.BHZ.00 2021-04-18T14:21:56.62 10.0 positive automatic P 6 38.7463 -4.29925 0.540164
AU.KDU.BHZ.00 2021-04-18T14:21:51.35 10.0 positive automatic P 162 37.9329 -2.71496 0.787684
AU.MTN.BHZ.00 2021-04-18T14:21:49.13 10.0 positive automatic P 164 37.7337 -3.2727 0.782319
AU.MANU.BHZ.00 2021-04-18T14:21:39.13 10.0 negative automatic P 132 36.009 1.40444 0.807019
GE.SOEI.BHZ. 2021-04-18T14:21:17.92 10.0 positive automatic P 175 33.5541 1.24214 0.898144
GE.FAKI.BHZ. 2021-04-18T14:20:32.27 10.0 positive automatic P 157 28.6034 -0.628901 0.930233
MY.KUM.BHZ. 2021-04-18T14:20:22.57 10.0 positive automatic P 231 27.2047 2.1822 0.714286
IN.SHL.HHZ. 2021-04-18T14:20:19.89 10.0 positive automatic P 280 26.9248 2.03392 0.49505
IU.ULN.BHZ.00 2021-04-18T14:20:15.52 10.0 positive automatic P 338 26.752 -1.05836 0.930233
JP.JKA.BHZ. 2021-04-18T14:20:13.75 10.0 positive automatic sP 40 24.8088 8.52405 0
GE.SANI.BHZ. 2021-04-18T14:20:09.07 10.0 positive automatic P 170 26.1102 -1.44143 0.909091
GE.BKB.BHZ. 2021-04-18T14:20:07.02 10.0 negative automatic sP 191 25.1875 -0.590076 0
II.ERM.BHZ.00 2021-04-18T14:20:03.42 10.0 negative automatic P 39 25.6963 -3.34568 0.930233
GE.LUWI.BHZ. 2021-04-18T14:19:57.27 10.0 positive automatic P 177 24.7616 -0.993619 0.952381
IU.GUMO.BHZ.00 2021-04-18T14:19:55.42 10.0 negative automatic P 110 24.3165 1.18032 0.851064
GE.TNTI.BHZ. 2021-04-18T14:19:50.17 10.0 negative automatic P 165 23.6194 2.32281 0.833333
JP.JTM.BHZ. 2021-04-18T14:19:45.65 10.0 positive automatic P 39 23.7059 -3.00449 0.952381
MY.SBM.BHZ. 2021-04-18T14:19:42.07 10.0 positive automatic P 204 23.0435 0.075031 0.43956
IU.CHTO.BHZ.00 2021-04-18T14:19:29.12 10.0 positive automatic P 261 21.5202 3.31514 0.740741
MY.LDM.BHZ. 2021-04-18T14:19:02.47 10.0 positive automatic P 189 18.7291 7.05775 0.833333
IU.MAJO.BHZ.00 2021-04-18T14:19:01.12 10.0 negative automatic P 44 19.3075 -0.674043 0.952381
JP.JCJ.BHZ. 2021-04-18T14:18:58.35 10.0 positive automatic P 75 19.0016 -0.0450016 0.43956
JP.JHJ2.BHZ. 2021-04-18T14:18:56.30 10.0 negative automatic P 56 18.6477 1.80265 0.930233
MY.KKM.BHZ. 2021-04-18T14:18:55.82 10.0 positive automatic P 197 18.3516 4.46883 0.952381
JP.JGF.BHZ. 2021-04-18T14:18:47.65 10.0 positive automatic P 45 18.1932 -1.76144 0.888889
G.INU.BHZ.00 2021-04-18T14:18:45.16 10.0 positive automatic P 46 17.8292 0.304574 0.952381
IU.INCN.BHZ.00 2021-04-18T14:18:03.57 10.0 negative automatic P 17 14.4797 1.86459 0.754717
JP.JTU.BHZ. 2021-04-18T14:17:39.80 10.0 positive automatic P 31 12.853 0.289275 0.5
JP.JSU.BHZ. 2021-04-18T14:17:15.70 10.0 positive automatic P 44 11.1532 -0.626341 0.952381
JP.JOW.BHZ. 2021-04-18T14:16:15.85 10.0 negative automatic P 61 6.9126 -2.30628 0.930233
JP.YOJ.BHZ. 2021-04-18T14:15:04.55 10.0 positive automatic P 61 1.6124 -0.728529 0.952381
IU.TATO.BHZ.00 2021-04-18T14:15:00.33 10.0 positive automatic P 1 1.2855 -1.13169 0.909091
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