Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of Mwp 6.6 on date 01-08-2019 and time 20:28:06 (Italy) in region Chile (Peruvian point of view) [Sea]

A magnitude Mwp 6.6 earthquake occured in region: Chile (Peruvian point of view) [Sea], on

  • 01-08-2019 18:28:06 (UTC)
  • 01-08-2019 20:28:06 (UTC +02:00) Italian time
  • 01-08-2019 14:28:06 (UTC -04:00) local time in the region of the earthquake (America/Santiago)

and geographic coordinates (lat, lon) -34.17, -72.38 at 20 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
The earthquake effects in MCS scale as obtained from the compiled questionnaire

The earthquake effects in MCS scale as obtained from the compiled 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 5.5
Mwp 6.6
Mwpd 6.8 		2019-08-01
18:28:06		 -34.17 -72.38 20 2019-08-01
18:41:42		 Sala Sismica INGV-Roma 71088401
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-08-01 18:28:06
Latitude -34.17
Longitude -72.38
Depth (km) 20 (from location)
Evaluation mode of Origin automatic
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV-A
Event type earthquake
Origin ID 71088401

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 5287
Semi-minor axis of confidence ellipse (meter) 519
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 96
Circular confidence region, given by single value of horizontal uncertainty (meter) 4282.2
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 93.5884
Number of associated phases, regardless of their use for origin computation 43
Number of defining phases 43
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 1.41548
Epicentral distance of station closest to the epicenter (degree) 1.45555
Epicentral distance of station farthest from the epicenter (degree) 56.45761
Number of stations at which the event was observed 38
Number of stations from which data was used for origin computation 38
Magnitudes information

Mwp:6.6

Field Value
Value 6.6
Uncertainty 0.1
Num. used stations 23
Type of magnitude Mwp
Reference to an origin 71088401
Agency INGV
Autore early-est_ee1.1.9
Time of creation (UTC) 2019-08-01 18:41:42

Mwpd:6.8

Field Value
Value 6.8
Uncertainty 0.2
Num. used stations 11
Type of magnitude Mwpd
Reference to an origin 71088401
Agency INGV
Autore early-est_ee1.1.9
Time of creation (UTC) 2019-08-01 18:41:42

mb:5.5

Field Value
Value 5.5
Uncertainty 0.2
Num. used stations 19
Type of magnitude mb
Reference to an origin 71088401
Agency INGV
Autore early-est_ee1.1.9
Time of creation (UTC) 2019-08-01 18:41:42
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IU.TEIG.BHZ.00 2019-08-01T18:37:51.42 10.0 negative automatic pP 342 56.4576 -0.954749 0
IU.TEIG.BHZ.00 2019-08-01T18:37:45.47 10.0 negative automatic P 342 56.4576 -0.592251 0.46351
IU.QSPA.BHZ.00 2019-08-01T18:37:44.42 10.0 positive automatic P 180 55.8878 1.94836 0.461221
CU.GRTK.BHZ.00 2019-08-01T18:37:39.97 10.0 positive automatic P 1 55.6882 -0.58378 0
CU.GTBY.BHZ.00 2019-08-01T18:37:28.67 10.0 positive automatic P 357 54.1537 -0.791693 0.230382
CU.SDDR.BHZ.00 2019-08-01T18:37:20.55 10.0 positive automatic P 1 53.1565 -1.69499 0.237693
CU.MTDJ.BHZ.00 2019-08-01T18:37:17.85 10.0 positive automatic P 354 52.6202 -0.494557 0.241671
CU.ANWB.BHZ.00 2019-08-01T18:37:16.70 10.0 positive automatic P 13 52.805 -2.86357 0.240297
IU.SJG.BHZ.00 2019-08-01T18:37:15.05 10.0 positive automatic P 7 52.6086 -3.12696 0.241758
GE.SNAA.BHZ. 2019-08-01T18:37:09.66 10.0 positive automatic P 158 51.3836 0.542739 0.543771
G.FDF.BHZ.00 2019-08-01T18:36:57.25 10.0 positive automatic P 14 50.0541 -1.77639 0.261167
GE.BOAB.BHZ. 2019-08-01T18:36:45.20 10.0 positive automatic P 343 48.2966 -0.368748 0.424085
CU.GRGR.BHZ.00 2019-08-01T18:36:37.77 10.0 positive automatic P 14 47.4059 -0.864526 0.596958
II.JTS.BHZ.00 2019-08-01T18:36:29.55 10.0 positive automatic P 343 46.0315 1.65298 0.29325
IU.RCBR.BHZ.00 2019-08-01T18:36:12.12 10.0 positive automatic P 58 44.0327 0.106124 0.6558
CU.BCIP.BHZ.00 2019-08-01T18:36:11.87 10.0 positive automatic P 349 43.9057 0.939658 0.432015
G.MPG.BHZ.00 2019-08-01T18:36:06.25 10.0 positive automatic P 29 43.4701 -1.18931 0.665883
IU.OTAV.BHZ.00 2019-08-01T18:34:57.92 10.0 positive automatic P 349 34.8711 1.74526 0.829566
IU.PMSA.BHZ.00 2019-08-01T18:34:23.47 10.0 positive automatic P 173 31.0222 1.51795 0
BL.PMNB.HHZ. 2019-08-01T18:33:53.30 10.0 positive automatic P 63 27.8664 -0.822627 0.83682
G.SPB.BHZ.00 2019-08-01T18:33:19.95 10.0 positive automatic P 71 24.1789 -0.766386 0.851064
II.NNA.BHZ.00 2019-08-01T18:33:06.17 10.0 positive automatic P 349 22.5482 1.693 0.43956
II.EFI.BHZ.00 2019-08-01T18:32:38.90 10.0 negative automatic P 154 20.3225 -1.59233 0.963855
C1.MG02.BHZ. 2019-08-01T18:32:23.75 10.0 positive automatic P 174 18.7488 0.465565 0.43956
GT.LPAZ.BHZ.00 2019-08-01T18:32:18.60 10.0 positive automatic P 13 18.2802 -0.291174 0.963855
G.COYC.BHZ.00 2019-08-01T18:30:49.95 10.0 positive automatic P 179 11.4081 2.46151 0.952381
C1.LL02.BHZ. 2019-08-01T18:30:16.55 10.0 positive automatic P 178 9.0329 1.57053 0.963855
C.GO02.BHZ. 2019-08-01T18:30:16.85 10.0 positive automatic P 16 9.3219 -2.47631 0.434783
C1.LL01.BHZ. 2019-08-01T18:30:02.20 10.0 positive automatic P 180 8.2118 -1.46697 0.952381
C.GO03.BHZ. 2019-08-01T18:29:44.20 10.0 negative automatic P 16 6.824 -0.539251 0.963855
GT.PLCA.BHZ.00 2019-08-01T18:29:42.93 10.0 positive automatic P 168 6.7233 -0.489445 0.869565
C.GO06.BHZ. 2019-08-01T18:29:25.28 10.0 negative automatic P 173 5.465 -0.883927 0.952381
C1.VA04.BHZ. 2019-08-01T18:29:24.03 10.0 negative automatic P 274 5.3811 -0.789917 0.43956
IU.LCO.BHZ.00 2019-08-01T18:29:24.77 10.0 positive automatic P 16 5.3489 0.0240455 0.952381
WA.ZON.HHZ. 2019-08-01T18:29:09.02 10.0 positive automatic P 51 4.0595 2.25767 0.888889
C.GO04.BHZ. 2019-08-01T18:29:09.53 10.0 positive automatic P 19 4.2106 0.453298 0.987654
C1.CO02.BHZ. 2019-08-01T18:28:55.58 10.0 positive automatic P 22 3.1808 0.82156 0.987654
G.PEL.BHZ.00 2019-08-01T18:28:36.00 10.0 positive automatic P 55 1.7465 1.05639 0.97561
C1.BO02.BHZ. 2019-08-01T18:28:30.05 10.0 negative automatic P 116 1.4555 -0.929785 0.658436
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download