Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.4 on date 10-12-2021 and time 08:20:09 (Italy) in region 10 km SW Vinadio (CN)

A magnitude ML 1.4 earthquake occured in region: 10 km SW Vinadio (CN), on

  • 10-12-2021 07:20:09 (UTC)
  • 10-12-2021 08:20:09 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.2220, 7.1390 at 11 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
Vinadio CN 10 644 644
Aisone CN 12 248 892
Sambuco CN 14 92 984
Pietraporzio CN 16 77 1061
Demonte CN 17 2003 3064

Municipalities with at least 50000 inhabitants

An earthquake occurred to
38 Km SW of Cuneo (56081 inhabitants)
68 Km NW of Sanremo (54807 inhabitants)
97 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
Bulletin
Rev1000 		ML 1.4 2021-12-10
07:20:09		 44.2217 7.1393 11 2022-03-30
13:04:35		 Bollettino Sismico Italiano INGV 100742011
Reviewed
Rev100 		ML 1.5 2021-12-10
07:20:09		 44.2302 7.1307 10 2021-12-10
07:25:02		 Sala Sismica INGV-Roma 98372641
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-12-10 07:20:09 ± 0.11
Latitude 44.2217 ± 0.0054
Longitude 7.1393 ± 0.0088
Depth (km) 11 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 100742011

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 728
Semi-minor axis of confidence ellipse (meter) 388
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 228
Circular confidence region, given by single value of horizontal uncertainty (meter) 730.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 163
Number of associated phases, regardless of their use for origin computation 22
Number of defining phases 22
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) 0.13580
Epicentral distance of station farthest from the epicenter (degree) 1.13494
Number of stations at which the event was observed 14
Number of stations from which data was used for origin computation 14
Magnitudes information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.3
Num. used stations 16
Type of magnitude ML
Reference to an origin 100742011
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-02-08 00:44:31

ML:1.5

Field Value
Value 1.5
Uncertainty 0.3
Num. used stations 10
Type of magnitude ML
Reference to an origin 98372641
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-12-10 07:25:02
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
GU.BHB.HHZ. 2021-12-10T07:20:29.69 0.6 undecidable manual S 8 68.7756 90 -0.46 42
RD.ORIF.BHE. 2021-12-10T07:20:29.90 0.6 undecidable manual P 308 125.9739 90 -0.27 40
GU.GBOS.HHZ. 2021-12-10T07:20:27.07 0.6 undecidable manual S 87 55.6998 90 0.41 45
MN.BNI.HHN. 2021-12-10T07:20:26.03 0.6 undecidable manual P 339 99.0231 90 0.01 44
GU.BURY.HHZ. 2021-12-10T07:20:26.77 0.6 undecidable manual S 145 58.9965 90 -0.77 38
GU.MGRO.HHZ. 2021-12-10T07:20:26.98 0.6 undecidable manual S 110 56.7987 90 0.02 47
GU.CANO.HHZ. 2021-12-10T07:20:24.64 0.6 undecidable manual P 91 87.3459 90 0.44 42
GU.RRL.HHE. 2021-12-10T07:20:23.63 0.6 undecidable manual P 341 82.3509 90 0.19 44
FR.SAOF.HHZ.00 2021-12-10T07:20:22.85 0.6 undecidable manual S 128 42.0246 90 -0.17 47
GU.RORO.HHZ. 2021-12-10T07:20:22.74 0.6 undecidable manual P 99 74.7696 90 0.47 42
GU.BHB.HHZ. 2021-12-10T07:20:21.61 0.6 undecidable manual P 8 68.7756 90 0.26 44
GU.IMI.HHZ. 2021-12-10T07:20:21.65 0.1 positive manual P 120 69.2751 90 0.22 90
GU.MGRO.HHZ. 2021-12-10T07:20:19.64 1.0 undecidable manual P 110 56.7987 90 0.13 24
GU.PZZ.HHZ. 2021-12-10T07:20:19.90 0.6 undecidable manual S 357 31.6461 91 -0.34 47
GU.GBOS.HHZ. 2021-12-10T07:20:19.70 0.6 undecidable manual P 87 55.6998 90 0.36 45
GU.BURY.HHZ. 2021-12-10T07:20:19.73 0.6 undecidable manual P 145 58.9965 90 -0.12 47
FR.SAOF.HHZ.00 2021-12-10T07:20:17.14 0.1 positive manual P 128 42.0246 90 -0.09 96
GU.ENR.HHZ. 2021-12-10T07:20:17.36 0.6 undecidable manual S 88 22.1556 91 -0.35 46
GU.PZZ.HHZ. 2021-12-10T07:20:15.49 0.1 negative manual P 357 31.6461 91 -0.14 98
GU.STV.HHZ. 2021-12-10T07:20:15.71 0.6 undecidable manual S 80 15.0738 95 -0.11 49
GU.ENR.HHZ. 2021-12-10T07:20:14.32 0.1 positive manual P 88 22.1556 91 0.15 100
GU.STV.HHZ. 2021-12-10T07:20:13.01 0.6 undecidable manual P 80 15.0738 95 -0.07 50
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
GU.STV.HHN. ML:1.7 0.000439 0.26 AML other m 2021-12-10T07:20:15.72
GU.STV.HHE. ML:1.5 0.00029 0.38 AML other m 2021-12-10T07:20:15.74
GU.ENR.HHE. ML:1.6 0.00029099999999999997 1.68 AML other m 2021-12-10T07:20:17.92
GU.ENR.HHN. ML:1.8 0.000402 0.44 AML other m 2021-12-10T07:20:18.22
GU.PZZ.HHN. ML:1.7 0.00022349999999999998 1.78 AML other m 2021-12-10T07:20:20.96
GU.PZZ.HHE. ML:1.8 0.00032250000000000003 0.16 AML other m 2021-12-10T07:20:20.30
GU.GBOS.HHN. ML:1.2 0.000033653015 1.1616 AML other m 2021-12-10T07:20:27.96
GU.GBOS.HHE. ML:1.1 0.00002891979 0.3584 AML other m 2021-12-10T07:20:27.45
GU.BHB.HHN. ML:1.2 0.00003225 0.46 AML other m 2021-12-10T07:20:33.05
GU.BHB.HHE. ML:1.4 0.000039399999999999995 0.5 AML other m 2021-12-10T07:20:33.19
FR.SAOF.HHE.00 ML:1.0 0.000031592001 0.08 AML other m 2021-12-10T07:20:23.24
FR.SAOF.HHN.00 ML:1.1 0.00004051352 0.16 AML other m 2021-12-10T07:20:23.11
GU.MGRO.HHE. ML:1.3 0.00003922349 3.1776 AML other m 2021-12-10T07:20:29.06
GU.MGRO.HHN. ML:1.4 0.000049812974500000006 1.68 AML other m 2021-12-10T07:20:30.06
GU.BHB.HNN. ML:1.4 0.000041157239999999996 1.3504 AML other m 2021-12-10T07:20:30.06
GU.BHB.HNE. ML:1.2 0.00003177264 1.312 AML other m 2021-12-10T07:20:30.81
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