Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of Mwp 6.5 on date 21-09-2021 and time 15:14:31 (Italy) in region Chile (Peruvian point of view) [Sea]

A magnitude Mwp 6.5 earthquake occured in region: Chile (Peruvian point of view) [Sea], on

  • 21-09-2021 13:14:31 (UTC)
  • 21-09-2021 15:14:31 (UTC +02:00) Italian time
  • 21-09-2021 10:14:31 (UTC -03:00) local time in the region of the earthquake (America/Santiago)

and geographic coordinates (lat, lon) -36.7610, -73.9620 at 13 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.

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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
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100 		mb 5.4
Mwp 6.5
Mwpd 6.7 		2021-09-21
13:14:31		 -36.7611 -73.9622 13 2021-09-21
16:55:59		 Sala Sismica INGV-Roma 95709591
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-21 13:14:31
Latitude -36.7611
Longitude -73.9622
Depth (km) 13 (from location)
Evaluation mode of Origin automatic
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV-A
Event type earthquake
Origin ID 95709591

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 3733
Semi-minor axis of confidence ellipse (meter) 2129
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 287
Circular confidence region, given by single value of horizontal uncertainty (meter) 3439.8
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 135.189
Number of associated phases, regardless of their use for origin computation 20
Number of defining phases 20
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.760693
Epicentral distance of station closest to the epicenter (degree) 2.40325
Epicentral distance of station farthest from the epicenter (degree) 50.24639
Number of stations at which the event was observed 20
Number of stations from which data was used for origin computation 20
Magnitudes information

Mwpd:6.7

Field Value
Value 6.7
Uncertainty 0.0
Num. used stations 3
Type of magnitude Mwpd
Reference to an origin 95709591
Agency INGV
Autore early-est_ee1.1.9
Time of creation (UTC) 2021-09-21 16:55:59

Mwp:6.5

Field Value
Value 6.5
Uncertainty 0.1
Num. used stations 14
Type of magnitude Mwp
Reference to an origin 95709591
Agency INGV
Autore early-est_ee1.1.9
Time of creation (UTC) 2021-09-21 16:55:59

mb:5.4

Field Value
Value 5.4
Uncertainty 0.0
Num. used stations 10
Type of magnitude mb
Reference to an origin 95709591
Agency INGV
Autore early-est_ee1.1.9
Time of creation (UTC) 2021-09-21 16:55:59
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
CU.GRGR.BHZ.00 2021-09-21T13:23:26.82 10.0 positive automatic P 16 5577.3504 0.0274896 0.259679
GE.SNAA.BHZ. 2021-09-21T13:23:22.56 10.0 positive automatic pP 157 5492.7906 -2.68843 0
G.MPG.BHZ.00 2021-09-21T13:22:56.30 10.0 negative automatic P 30 5146.3929 -0.520754 0.57474
IU.OTAV.BHZ.00 2021-09-21T13:21:47.52 10.0 positive automatic pP 353 4132.5744 0.779831 0
BL.PMNB.HHZ. 2021-09-21T13:20:42.82 10.0 positive automatic P 60 3356.8065 1.28884 0.326606
G.SPB.BHZ.00 2021-09-21T13:20:11.25 10.0 negative automatic sP 67 2920.8873 -0.562818 0
II.EFI.BHZ.00 2021-09-21T13:18:49.12 10.0 positive automatic P 148 2073.6465 0.332486 0.43956
CX.MNMCX.BHZ. 2021-09-21T13:18:42.05 10.0 negative automatic P 13 2002.4622 0.357 0.930233
C.GO10.BHZ. 2021-09-21T13:18:33.08 10.0 negative automatic sP 174 1833.5313 2.93109 0
G.COYC.BHZ.00 2021-09-21T13:16:40.70 10.0 negative automatic P 171 990.5307 1.13884 0.909091
IU.LCO.BHZ.00 2021-09-21T13:16:30.47 10.0 positive automatic P 20 912.1869 0.237485 0.952381
WA.ZON.HHZ. 2021-09-21T13:16:11.68 10.0 positive automatic P 41 754.7889 1.16404 0.966184
C1.LL02.BHZ. 2021-09-21T13:16:07.93 10.0 negative automatic P 167 735.8634 -0.17615 0.930233
C1.CO02.BHZ. 2021-09-21T13:15:59.83 10.0 negative automatic P 25 674.2917 -0.803153 0.952381
C1.LL01.BHZ. 2021-09-21T13:15:55.10 10.0 positive automatic P 168 637.4286 -0.767429 0.941176
C1.VA04.BHZ. 2021-09-21T13:15:46.33 10.0 positive automatic P 307 560.8608 -0.0746342 0.963855
G.PEL.BHZ.00 2021-09-21T13:15:38.70 10.0 positive automatic P 38 500.5767 -0.335454 0.851064
C.GO06.BHZ. 2021-09-21T13:15:24.05 10.0 positive automatic P 146 381.2517 -0.301729 0.963855
C1.BO02.BHZ. 2021-09-21T13:15:21.22 10.0 positive automatic P 54 360.2283 -0.465359 0.97561
C.GO05.BHZ. 2021-09-21T13:15:09.43 10.0 positive automatic P 44 266.7663 -0.545712 0.43956
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