Earthquake with magnitude of Mwp 6.5 on date 21-09-2021 and time 13:14:31 (UTC) 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) -36.761, -73.962 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.

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

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 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 ( 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
mb 5.4
Mwp 6.5

Mwpd 6.7
-36.7611 -73.9622 13 2021-09-21
Sala Sismica INGV-Roma 95709591
Preferred location and magnitude until now.
Origin information


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


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


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


Field Value
Value 6.7
Uncertainty 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


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


Field Value
Value 5.4
Uncertainty 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 Takeoff_angle Residual Weight
CU.GRGR.BHZ.00 2021-09-21T13:23:26.82 10.0 positive automatic P 16 50.2464 0.0274896 0.259679
GE.SNAA.BHZ. 2021-09-21T13:23:22.56 10.0 positive automatic pP 157 49.4846 -2.68843 0
G.MPG.BHZ.00 2021-09-21T13:22:56.30 10.0 negative automatic P 30 46.3639 -0.520754 0.57474
IU.OTAV.BHZ.00 2021-09-21T13:21:47.52 10.0 positive automatic pP 353 37.2304 0.779831 0
BL.PMNB.HHZ. 2021-09-21T13:20:42.82 10.0 positive automatic P 60 30.2415 1.28884 0.326606
G.SPB.BHZ.00 2021-09-21T13:20:11.25 10.0 negative automatic sP 67 26.3143 -0.562818 0
II.EFI.BHZ.00 2021-09-21T13:18:49.12 10.0 positive automatic P 148 18.6815 0.332486 0.43956
CX.MNMCX.BHZ. 2021-09-21T13:18:42.05 10.0 negative automatic P 13 18.0402 0.357 0.930233
C.GO10.BHZ. 2021-09-21T13:18:33.08 10.0 negative automatic sP 174 16.5183 2.93109 0
G.COYC.BHZ.00 2021-09-21T13:16:40.70 10.0 negative automatic P 171 8.9237 1.13884 0.909091
IU.LCO.BHZ.00 2021-09-21T13:16:30.47 10.0 positive automatic P 20 8.2179 0.237485 0.952381
WA.ZON.HHZ. 2021-09-21T13:16:11.68 10.0 positive automatic P 41 6.7999 1.16404 0.966184
C1.LL02.BHZ. 2021-09-21T13:16:07.93 10.0 negative automatic P 167 6.6294 -0.17615 0.930233
C1.CO02.BHZ. 2021-09-21T13:15:59.83 10.0 negative automatic P 25 6.0747 -0.803153 0.952381
C1.LL01.BHZ. 2021-09-21T13:15:55.10 10.0 positive automatic P 168 5.7426 -0.767429 0.941176
C1.VA04.BHZ. 2021-09-21T13:15:46.33 10.0 positive automatic P 307 5.0528 -0.0746342 0.963855
G.PEL.BHZ.00 2021-09-21T13:15:38.70 10.0 positive automatic P 38 4.5097 -0.335454 0.851064
C.GO06.BHZ. 2021-09-21T13:15:24.05 10.0 positive automatic P 146 3.4347 -0.301729 0.963855
C1.BO02.BHZ. 2021-09-21T13:15:21.22 10.0 positive automatic P 54 3.2453 -0.465359 0.97561
C.GO05.BHZ. 2021-09-21T13:15:09.43 10.0 positive automatic P 44 2.4033 -0.545712 0.43956
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download