Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.2 on date 03-12-2021 and time 18:57:50 (UTC) in region 9 km SW Vinadio (CN)

A magnitude ML 1.2 earthquake occured in region: 9 km SW Vinadio (CN), on

  • 03-12-2021 18:57:50 (UTC)
  • 03-12-2021 19:57:50 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.2320, 7.1440 at 10 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

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Vinadio CN 9 644 644
Aisone CN 11 248 892
Sambuco CN 13 92 984
Pietraporzio CN 15 77 1061
Demonte CN 16 2003 3064

Municipalities with at least 50000 inhabitants

An earthquake occurred to
37 Km W of Cuneo (56081 inhabitants)
69 Km NW of Sanremo (54807 inhabitants)
96 Km SW of Moncalieri (57294 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 		ML 1.2 2021-12-03
18:57:50		 44.2323 7.1435 11 2021-12-03
19:04:58		 Sala Sismica INGV-Roma 98101351
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-12-03 18:57:50 ± 0.19
Latitude 44.2323 ± 0.0099
Longitude 7.1435 ± 0.0126
Depth (km) 11 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 98101351

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1320
Semi-minor axis of confidence ellipse (meter) 566
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 46
Circular confidence region, given by single value of horizontal uncertainty (meter) 1320.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 178
Number of associated phases, regardless of their use for origin computation 15
Number of defining phases 15
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.22
Epicentral distance of station closest to the epicenter (degree) 0.13130
Epicentral distance of station farthest from the epicenter (degree) 1.13135
Number of stations at which the event was observed 11
Number of stations from which data was used for origin computation 11
Magnitude information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.3
Num. used stations 11
Type of magnitude ML
Reference to an origin 98101351
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-12-03 19:04:58
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
RD.ORIF.BHE. 2021-12-03T18:58:11.45 0.6 undecidable manual P 308 125.5743 50 -0.29 39
GU.GBOS.HHZ. 2021-12-03T18:58:08.22 0.6 undecidable manual S 89 55.4001 50 -0.05 47
GU.RRL.HHE. 2021-12-03T18:58:05.36 0.3 undecidable manual P 340 81.3519 50 0.43 61
GU.RORO.HHE. 2021-12-03T18:58:04.26 0.3 undecidable manual P 100 74.6697 50 0.36 63
GU.IMI.HHZ. 2021-12-03T18:58:03.10 0.3 undecidable manual P 121 69.5748 50 -0.02 69
GU.BHB.HHE. 2021-12-03T18:58:03.09 0.6 undecidable manual P 8 67.5768 50 0.29 43
GU.GBOS.HHZ. 2021-12-03T18:58:01.16 0.3 undecidable manual P 89 55.4001 50 0.23 67
GU.MGRO.HHZ. 2021-12-03T18:58:01.16 0.3 undecidable manual P 111 56.8986 50 -0.01 70
GU.PZZ.HHZ. 2021-12-03T18:58:01.16 0.6 undecidable manual S 356 30.4473 50 -0.47 45
GU.ENR.HHZ. 2021-12-03T18:57:59.10 0.6 undecidable manual S 91 21.867 116 -0.19 48
FR.SAOF.HHE.00 2021-12-03T18:57:58.55 0.3 undecidable manual P 130 42.5241 50 -0.4 67
GU.STV.HHZ. 2021-12-03T18:57:57.08 0.6 undecidable manual S 84 14.5743 126 -0.04 50
GU.PZZ.HHZ. 2021-12-03T18:57:56.90 0.6 negative manual P 356 30.4473 50 -0.19 47
GU.ENR.HHZ. 2021-12-03T18:57:55.73 0.1 positive manual P 91 21.867 116 -0.01 100
GU.STV.HHZ. 2021-12-03T18:57:54.54 0.3 undecidable manual P 84 14.5743 126 0.05 75
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
GU.STV.HHN. ML:1.1 0.000119893235 0.0768 AML other m 2021-12-03T18:57:57.13
GU.STV.HHE. ML:0.8 0.000066067195 0.0768 AML other m 2021-12-03T18:57:57.15
GU.ENR.HHE. ML:1.1 0.000083872615 0.1408 AML other m 2021-12-03T18:57:59.32
GU.ENR.HHN. ML:1.2 0.00010330977499999999 0.064 AML other m 2021-12-03T18:57:59.40
GU.PZZ.HHE. ML:1.3 0.00008473120000000001 0.1536 AML other m 2021-12-03T18:58:01.72
GU.PZZ.HHN. ML:1.1 0.000056730625 0.2176 AML other m 2021-12-03T18:58:01.38
GU.MGRO.HNN. ML:1.7 0.00011099599999999999 1.7536 AML other m 2021-12-03T18:58:13.82
GU.GBOS.HHE. ML:0.9 0.000022475185 1.4208 AML other m 2021-12-03T18:58:24.20
GU.GBOS.HHN. ML:1.0 0.000027259415000000003 1.6128 AML other m 2021-12-03T18:58:15.97
GU.MGRO.HHE. ML:1.4 0.000058163405 1.4592 AML other m 2021-12-03T18:58:27.23
GU.MGRO.HHN. ML:1.6 0.00009731069000000001 1.92 AML other m 2021-12-03T18:58:13.83
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