Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.2 on date 06-11-2021 and time 18:05:36 (Italy) in region 3 km W Sanremo (IM)

A magnitude ML 1.2 earthquake occured in region: 3 km W Sanremo (IM), on

  • 06-11-2021 17:05:36 (UTC)
  • 06-11-2021 18:05:36 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.8330, 7.7540 at 9 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

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

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Sanremo IM 3 54807 54807
Ospedaletti IM 5 3367 58174
Seborga IM 5 315 58489
Ceriana IM 6 1250 59739
Vallebona IM 7 1310 61049
Perinaldo IM 7 870 61919
Taggia IM 8 14116 76035
Soldano IM 8 977 77012
Bajardo IM 8 312 77324
San Biagio della Cima IM 8 1329 78653
Bordighera IM 9 10469 89122
Apricale IM 9 629 89751
Vallecrosia IM 10 6956 96707
Castellaro IM 10 1256 97963
Camporosso IM 10 5632 103595
Riva Ligure IM 10 2910 106505
Dolceacqua IM 11 2074 108579
Isolabona IM 11 679 109258
Pompeiana IM 11 823 110081
Santo Stefano al Mare IM 12 2197 112278
Badalucco IM 12 1136 113414
Terzorio IM 12 216 113630
Ventimiglia IM 13 24310 137940
Castel Vittorio IM 13 287 138227
Montalto Ligure IM 13 377 138604
Pigna IM 13 859 139463
Pietrabruna IM 14 501 139964
Rocchetta Nervina IM 14 298 140262
Cipressa IM 15 1290 141552
Costarainera IM 15 828 142380
Airole IM 17 407 142787
Civezza IM 17 609 143396
Carpasio IM 17 168 143564
San Lorenzo al Mare IM 17 1297 144861
Molini di Triora IM 18 617 145478
Dolcedo IM 18 1415 146893
Triora IM 18 355 147248
Prelà IM 18 503 147751
Vasia IM 20 389 148140
Olivetta San Michele IM 20 211 148351

Municipalities with at least 50000 inhabitants

An earthquake occurred to
3 Km W of Sanremo (54807 inhabitants)
64 Km S of Cuneo (56081 inhabitants)
79 Km SW of Savona (61345 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
Bulletin
Rev1000 		ML 1.2 2021-11-06
17:05:36		 43.8333 7.754 9 2022-03-30
13:04:30		 Bollettino Sismico Italiano INGV 99736301
Reviewed
Rev100 		ML 1.1 2021-11-06
17:05:36		 43.8292 7.7563 8 2021-11-06
17:16:25		 Sala Sismica INGV-Roma 97298051
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-11-06 17:05:36 ± 0.17
Latitude 43.8333 ± 0.0081
Longitude 7.7540 ± 0.0087
Depth (km) 9 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 99736301

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 993
Semi-minor axis of confidence ellipse (meter) 202
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 149
Circular confidence region, given by single value of horizontal uncertainty (meter) 990.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 198
Number of associated phases, regardless of their use for origin computation 36
Number of defining phases 14
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.26
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.81389
Number of stations at which the event was observed 28
Number of stations from which data was used for origin computation 8
Magnitudes information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.2
Num. used stations 6
Type of magnitude ML
Reference to an origin 97298051
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-11-06 17:16:25

ML:1.2

Field Value
Value 1.2
Uncertainty 0.2
Num. used stations 6
Type of magnitude ML
Reference to an origin 99736301
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-01-13 11:12:25
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.SGO.HHZ. 2021-11-06T17:07:27.49 3.0 undecidable manual Pg 24 0
IV.MILZ.HHZ. 2021-11-06T17:07:26.04 3.0 undecidable manual Pn 3.3 0
SI.MOSI.HHZ. 2021-11-06T17:07:24.24 3.0 undecidable manual Sg 14.56 0
IV.PIPA.HHZ. 2021-11-06T17:07:23.87 3.0 positive manual Pn -1.09 0
IV.CTI.HHZ. 2021-11-06T17:07:23.81 3.0 undecidable manual Sg 12.94 0
IV.GAVE.EHZ. 2021-11-06T17:07:11.59 3.0 undecidable manual Sn -1.65 0
IV.ZEN8.EHZ. 2021-11-06T17:07:02.22 3.0 undecidable manual Sg 9.61 0
IV.GIUL.HHZ. 2021-11-06T17:06:55.03 3.0 undecidable manual Pg 16.92 0
IV.BRSN.EHZ. 2021-11-06T17:06:54.91 3.0 undecidable manual Sn -2.32 0
IV.MBAL.EHZ. 2021-11-06T17:06:54.61 3.0 undecidable manual Sn -0.58 0
IV.RIBO.EHZ.01 2021-11-06T17:06:52.17 3.0 undecidable manual Sg 12.63 0
IV.VOBA.EHZ. 2021-11-06T17:06:51.03 3.0 undecidable manual Sn 0.99 0
IV.VIVA.HHZ. 2021-11-06T17:06:49.39 3.0 negative manual Pg 16.93 0
CH.DIX.HHZ. 2021-11-06T17:06:47.26 3.0 undecidable manual Sg 1.88 0
IV.MF5.EHZ. 2021-11-06T17:06:36.91 3.0 undecidable manual Pn 3.49 0
IV.IMOL.HNZ. 2021-11-06T17:06:28.78 3.0 undecidable manual Pg 12.03 0
IV.MBAL.EHZ. 2021-11-06T17:06:25.23 3.0 positive manual Pg 6.64 0
IV.VOBA.EHZ. 2021-11-06T17:06:24.76 3.0 negative manual Pg 9.06 0
IV.ZCCA.HHZ. 2021-11-06T17:06:14.44 3.0 undecidable manual Pg 4.94 0
IV.MRGE.HHZ. 2021-11-06T17:06:08.61 3.0 undecidable manual Pn -1.11 0
IV.PII.HHZ. 2021-11-06T17:06:04.75 3.0 undecidable manual Pn 1.41 0
IV.PCN.HNZ. 2021-11-06T17:06:01.87 3.0 undecidable manual Pn -2.59 0
GU.ENR.HHZ. 2021-11-06T17:05:52.87 0.6 undecidable manual S 329 51.4152 50 -0.53 42
GU.PZZ.HHZ. 2021-11-06T17:05:52.83 0.1 undecidable manual P 326 90.3429 50 0.51 79
GU.GBOS.HHZ. 2021-11-06T17:05:51.25 0.6 undecidable manual S 9 45.8208 50 -0.64 41
GU.STV.HHZ. 2021-11-06T17:05:47.24 0.3 undecidable manual P 323 56.9985 50 0.05 69
GU.ENR.HHZ. 2021-11-06T17:05:46.43 0.3 undecidable manual P 329 51.4152 50 0.1 70
GU.GBOS.HHZ. 2021-11-06T17:05:45.51 0.3 undecidable manual P 9 45.8208 50 0.05 71
GU.MGRO.HHZ. 2021-11-06T17:05:45.28 0.3 undecidable manual S 11 23.5542 110 -0.13 73
FR.SAOF.HHZ.00 2021-11-06T17:05:45.47 0.3 undecidable manual S 317 23.3544 110 0.15 72
GU.IMI.HHZ. 2021-11-06T17:05:42.22 0.3 undecidable manual S 52 14.0748 122 -0.19 73
GU.MGRO.HHZ. 2021-11-06T17:05:42.11 0.3 undecidable manual P 11 23.5542 110 0.39 69
GU.BURY.HHZ. 2021-11-06T17:05:42.93 0.3 undecidable manual S 250 16.7721 117 -0.3 71
FR.SAOF.HHZ.00 2021-11-06T17:05:41.67 0.3 undecidable manual P 317 23.3544 110 0 75
GU.BURY.HHZ. 2021-11-06T17:05:40.42 0.1 undecidable manual P 250 16.7721 117 -0.04 100
GU.IMI.HHZ. 2021-11-06T17:05:40.04 0.1 negative manual P 52 14.0748 122 0.05 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
GU.IMI.HHN. ML:1.0 0.000121253983 0.1024 AML other m 2021-11-06T17:05:42.63
GU.IMI.HHE. ML:0.9 0.00008193763500000001 0.0896 AML other m 2021-11-06T17:05:42.69
GU.BURY.HNN. ML:1.1 0.00011777784999999999 0.1536 AML other m 2021-11-06T17:05:43.01
GU.BURY.HHN. ML:1.4 0.00020600000000000002 0.16 AML other m 2021-11-06T17:05:43.10
GU.BURY.HNE. ML:1.3 0.00016819455 0.1536 AML other m 2021-11-06T17:05:43.09
GU.BURY.HHE. ML:1.2 0.00015099999999999998 0.46 AML other m 2021-11-06T17:05:43.21
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