Earthquake with magnitude of Mwp 6.1 on date 28-04-2021 and time 02:21:25 (UTC) in region Northeastern India [Land: India]

A magnitude Mwp 6.1 earthquake occured in region: Northeastern India [Land: India], on

  • 28-04-2021 02:21:25 (UTC)
  • 28-04-2021 04:21:25 (UTC +02:00) Italian time
  • 28-04-2021 08:21:25 (UTC +06:00) local time in the region of the earthquake (Asia/Thimphu)

and geographic coordinates (lat, lon) 26.747, 92.333 at 16 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 6.3
2021-04-28
02:21:25
26.7469 92.3331 16 2021-04-28
02:37:05
Sala Sismica INGV-Roma 89545031
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-04-28 02:21:25
Latitude 26.7469
Longitude 92.3331
Depth (km) 16 (from location)
Evaluation mode of Origin automatic
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV-A
Event type earthquake
Origin ID 89545031

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 10814
Semi-minor axis of confidence ellipse (meter) 10244
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 103
Circular confidence region, given by single value of horizontal uncertainty (meter) 11851.1
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 42.3626
Number of associated phases, regardless of their use for origin computation 91
Number of defining phases 91
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 1.33566
Epicentral distance of station closest to the epicenter (degree) 5.05084
Epicentral distance of station farthest from the epicenter (degree) 63.69539
Number of stations at which the event was observed 77
Number of stations from which data was used for origin computation 77
Magnitudes information

Mwpd:6.3

Field Value
Value 6.3
Uncertainty 0.2
Num. used stations 31
Type of magnitude Mwpd
Reference to an origin 89545031
Agency INGV
Autore early-est_ee1.1.9
Time of creation (UTC) 2021-04-28 02:37:05

Mwp:6.1

Field Value
Value 6.1
Uncertainty 0.1
Num. used stations 32
Type of magnitude Mwp
Reference to an origin 89545031
Agency INGV
Autore early-est_ee1.1.9
Time of creation (UTC) 2021-04-28 02:37:05

mb:5.6

Field Value
Value 5.6
Uncertainty 0.1
Num. used stations 47
Type of magnitude mb
Reference to an origin 89545031
Agency INGV
Autore early-est_ee1.1.9
Time of creation (UTC) 2021-04-28 02:37:05
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
MN.CEL.BHZ. 2021-04-28T02:31:54.57 10.0 positive automatic P 302 63.6954 0.30215 0
IU.KONO.BHZ.00 2021-04-28T02:31:53.32 10.0 positive automatic P 326 63.5462 0.119604 0
GE.KBS.BHZ.00 2021-04-28T02:31:42.72 10.0 positive automatic P 348 61.9435 0.226713 0.336404
MN.BLY.BHZ. 2021-04-28T02:31:39.07 10.0 positive automatic P 309 61.352 0.532011 0.392685
GE.MORC.BHZ. 2021-04-28T02:31:32.35 10.0 positive automatic P 314 60.3329 0.659744 0
HU.KOVH.BHZ. 2021-04-28T02:31:32.70 10.0 positive automatic P 310 60.4917 0.0040977 0
MN.PDG.BHZ. 2021-04-28T02:31:31.07 10.0 positive automatic P 306 60.2908 -0.212334 0.39818
AU.MANU.BHZ.00 2021-04-28T02:31:31.18 10.0 positive automatic P 109 60.3004 -0.190016 0.192314
IU.BILL.BHZ.00 2021-04-28T02:31:25.52 10.0 positive automatic P 25 59.417 0.196834 0
GE.PSZ.BHZ. 2021-04-28T02:31:23.30 10.0 positive automatic P 312 59.0267 0.569252 0
HT.AGG.HHZ. 2021-04-28T02:31:18.50 10.0 positive automatic P 301 58.6198 -1.34085 0.433874
MN.BZS.BHZ. 2021-04-28T02:31:16.82 10.0 positive automatic P 309 58.1162 0.555452 0.439221
HU.LTVH.BHZ. 2021-04-28T02:31:14.94 10.0 positive automatic P 311 57.7417 1.32302 0.434433
GE.SLIT.BHZ. 2021-04-28T02:31:08.40 10.0 positive automatic P 323 57.0888 -0.594237 0.443971
GE.KARP.BHZ. 2021-04-28T02:30:57.50 10.0 positive automatic P 296 55.4748 -0.0610875 0.447197
AU.FITZ.BHZ. 2021-04-28T02:30:53.43 10.0 positive automatic P 141 55.2785 -2.64621 0.476504
GE.VSU.BHZ. 2021-04-28T02:30:51.75 10.0 positive automatic P 324 54.7896 -0.787935 0.489778
HL.ARG.HHZ. 2021-04-28T02:30:50.98 10.0 positive automatic P 297 54.5938 -0.147378 0.118688
IU.MBWA.BHZ.00 2021-04-28T02:30:49.70 10.0 positive automatic P 148 54.7623 -2.66387 0.490204
AU.MTN.BHZ.00 2021-04-28T02:30:48.63 10.0 positive automatic P 131 54.6524 -2.92526 0.240241
GE.TIRR.BHZ. 2021-04-28T02:30:43.20 10.0 positive automatic P 307 53.455 0.39694 0.476778
AU.GIRL.BHZ.00 2021-04-28T02:30:43.80 10.0 negative automatic P 155 53.7392 -1.08849 0.494539
GE.PUL.BHZ. 2021-04-28T02:30:41.20 10.0 positive automatic P 326 53.1407 0.708411 0.49241
KO.ELL.BHZ. 2021-04-28T02:30:40.54 10.0 positive automatic P 297 53.0921 0.212824 0.497679
IU.KIEV.BHZ.00 2021-04-28T02:30:38.02 10.0 positive automatic P 315 52.8343 -0.22453 0.520779
MY.KUM.BHZ. 2021-04-28T02:30:31.97 10.0 negative automatic S 158 22.8755 -2.36815 0
KO.MDUB.BHZ. 2021-04-28T02:30:29.22 10.0 positive automatic P 302 51.6775 -0.589473 0.555437
IU.MA2.BHZ.00 2021-04-28T02:30:26.67 10.0 positive automatic P 34 51.3313 -0.418862 0.52047
GE.CSS.BHZ. 2021-04-28T02:30:21.55 10.0 positive automatic P 295 50.5929 0.00764764 0.520321
IU.ANTO.BHZ.00 2021-04-28T02:30:20.37 10.0 positive automatic P 301 50.5074 -0.644933 0.579612
GE.EIL.BHZ. 2021-04-28T02:30:18.45 10.0 positive automatic P 288 50.1294 0.450192 0.552088
GE.SALP.BHZ. 2021-04-28T02:30:14.62 10.0 positive automatic P 291 49.4918 1.42105 0.537578
II.AAK.BHZ.00 2021-04-28T02:26:13.87 10.0 positive automatic P 322 21.5329 1.64913 0.952381
KO.BZK.BHZ. 2021-04-28T02:30:14.18 10.0 positive automatic P 304 49.4897 1.05187 0.565244
IU.TIXI.BHZ.00 2021-04-28T02:30:10.37 10.0 negative automatic P 14 49.2137 -0.631309 0.530198
G.ATD.BHZ.00 2021-04-28T02:30:09.10 10.0 positive automatic P 262 48.8218 1.00494 0.548215
II.OBN.BHZ.00 2021-04-28T02:30:09.17 10.0 positive automatic P 321 48.9638 0.0663671 0.571346
KO.SNOP.BHZ. 2021-04-28T02:30:06.92 10.0 positive automatic P 304 48.5944 0.650828 0.549409
GE.FAKI.BHZ. 2021-04-28T02:30:04.22 10.0 positive automatic P 121 48.613 -2.18492 0.577208
KO.GAZ.BHZ. 2021-04-28T02:29:57.16 10.0 positive automatic P 297 47.2474 1.18211 0.620509
GE.SOEI.BHZ. 2021-04-28T02:29:57.27 10.0 positive automatic P 135 47.8815 -9.44817 0
IU.YSS.BHZ.00 2021-04-28T02:29:31.55 10.0 positive automatic P 49 44.1736 0.0120101 0.624896
II.ERM.BHZ.00 2021-04-28T02:29:29.22 10.0 positive automatic P 56 43.9148 -0.224591 0.643614
JP.JKA.BHZ. 2021-04-28T02:29:27.70 10.0 positive automatic P 57 43.4418 2.03144 0.31521
II.KIV.BHZ.00 2021-04-28T02:29:25.07 10.0 positive automatic P 307 43.2267 0.997364 0.67095
GE.SANI.BHZ. 2021-04-28T02:29:22.12 10.0 positive automatic P 126 43.383 -3.04158 0.684039
IU.YAK.BHZ.00 2021-04-28T02:29:22.42 10.0 positive automatic P 25 43.0757 -0.270843 0.658369
JP.JTM.BHZ. 2021-04-28T02:29:15.45 10.0 negative automatic P 58 42.27 -0.70104 0.672693
GE.JAGI.BHZ. 2021-04-28T02:29:04.72 10.0 negative automatic P 146 41.0864 -1.74602 0.727066
GE.LUWI.BHZ. 2021-04-28T02:28:58.87 10.0 positive automatic P 129 40.3916 -1.83214 0
IU.MAJO.BHZ.00 2021-04-28T02:28:55.27 10.0 positive automatic P 64 39.8671 -1.15226 0.685187
JP.JGF.BHZ. 2021-04-28T02:28:49.65 10.0 positive automatic P 66 39.1727 -1.01125 0.746157
G.INU.BHZ.00 2021-04-28T02:28:47.81 10.0 negative automatic P 66 38.9075 -0.555391 0.769101
II.ARTI.BHZ.00 2021-04-28T02:28:43.17 10.0 positive automatic P 330 38.2889 -0.0332999 0.78125
GE.SMRI.BHZ. 2021-04-28T02:28:41.57 10.0 positive automatic P 150 38.0801 0.149542 0.36248
JP.JMN.BHZ. 2021-04-28T02:28:28.40 10.0 negative automatic P 69 36.3142 1.90988 0.765961
MY.LDM.BHZ. 2021-04-28T02:27:57.77 10.0 positive automatic P 126 32.9806 0.160339 0.830125
II.UOSS.BHZ.00 2021-04-28T02:27:52.52 10.0 positive automatic P 275 32.4555 -0.510426 0.39397
GE.KAAM.BHZ. 2021-04-28T02:27:51.92 10.0 positive automatic P 218 32.17 1.44095 0.885473
JP.JOW.BHZ. 2021-04-28T02:27:47.35 10.0 negative automatic P 82 31.97 -1.40585 0.889628
MY.KKM.BHZ. 2021-04-28T02:27:38.02 10.0 positive automatic P 128 30.7496 -0.0982127 0.936975
MY.SBM.BHZ. 2021-04-28T02:27:38.42 10.0 positive automatic P 139 30.8753 -0.706326 0.912535
JP.YOJ.BHZ. 2021-04-28T02:27:11.70 10.0 positive automatic P 88 27.6915 0.86812 0.930233
GE.HMDM.BHZ. 2021-04-28T02:27:06.72 10.0 positive automatic P 226 27.0282 1.84769 0.869565
IU.TATO.BHZ.00 2021-04-28T02:27:00.32 10.0 negative automatic P 87 26.2455 2.47464 0.740741
II.TLY.BHZ.00 2021-04-28T02:26:59.97 10.0 positive automatic P 16 26.3563 1.05533 0.888889
II.KURK.BHZ.00 2021-04-28T02:26:56.67 10.0 positive automatic P 340 26.1477 -0.295113 0.952381
GE.GSI.BHZ. 2021-04-28T02:26:54.72 10.0 negative automatic P 168 25.9355 -0.309614 0.930233
IU.ULN.BHZ.00 2021-04-28T02:26:37.47 10.0 positive automatic P 25 24.0509 -0.678535 0.952381
GE.HALK.BHZ. 2021-04-28T02:26:33.60 10.0 positive automatic P 210 23.4508 1.26823 0.952381
MY.KUM.BHZ. 2021-04-28T02:26:24.72 10.0 positive automatic P 158 22.8755 -1.54554 0.888889
II.PALK.BHZ.00 2021-04-28T02:26:21.95 10.0 positive automatic P 212 22.3903 0.758916 0.930233
GE.LHMI.BHZ. 2021-04-28T02:26:17.17 10.0 negative automatic P 168 21.9629 0.618118 0
IU.MAKZ.BHZ.00 2021-04-28T02:26:13.02 10.0 positive automatic P 341 21.6621 -0.4096 0.930233
GE.MALK.BHZ. 2021-04-28T02:26:12.67 10.0 positive automatic P 213 21.4844 1.22962 0.930233
RM.DLV.BHZ. 2021-04-28T02:26:08.82 10.0 positive automatic P 131 21.1908 0.353553 0.930233
II.NIL.BHZ.00 2021-04-28T02:25:27.22 10.0 positive automatic P 297 17.8277 -3.7568 0.851064
IO.EVN.BHZ. 2021-04-28T02:22:42.05 10.0 positive automatic P 285 5.0508 2.61123 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