Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.1 on date 10-12-2021 and time 00:21:39 (UTC) in region Confine Italia Francia (FRANCIA)

A magnitude ML 1.1 earthquake occured in region: Confine Italia Francia (FRANCIA), on

  • 10-12-2021 00:21:39 (UTC)
  • 10-12-2021 01:21:39 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.7880, 6.7430 at 10 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
Claviere TO 17 214 214
Cesana Torinese TO 19 967 1181
Sauze di Cesana TO 20 244 1425

Municipalities with at least 50000 inhabitants

An earthquake occurred to
78 Km NW of Cuneo (56081 inhabitants)
78 Km W of Moncalieri (57294 inhabitants)
81 Km W of Torino (890529 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 1.1 2021-12-10
00:21:39		 44.7878 6.7433 10 2022-03-30
13:04:34		 Bollettino Sismico Italiano INGV 100486731
Reviewed
Rev100 		ML 1.4 2021-12-10
00:21:39		 44.7857 6.7873 8 2021-12-10
00:25:59		 Sala Sismica INGV-Roma 98366211
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-12-10 00:21:39 ± 0.17
Latitude 44.7878 ± 0.0063
Longitude 6.7433 ± 0.0101
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 100486731

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 765
Semi-minor axis of confidence ellipse (meter) 602
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 257
Circular confidence region, given by single value of horizontal uncertainty (meter) 770.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 145
Number of associated phases, regardless of their use for origin computation 14
Number of defining phases 14
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.31
Epicentral distance of station closest to the epicenter (degree) 0.13670
Epicentral distance of station farthest from the epicenter (degree) 0.72575
Number of stations at which the event was observed 7
Number of stations from which data was used for origin computation 7
Magnitudes information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.2
Num. used stations 11
Type of magnitude ML
Reference to an origin 100486731
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-02-01 15:47:50

ML:1.4

Field Value
Value 1.4
Uncertainty 0.1
Num. used stations 4
Type of magnitude ML
Reference to an origin 98366211
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-12-10 00:25:59
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
GU.LSD.HHZ. 2021-12-10T00:22:03.62 0.1 undecidable manual S 22 80.5638 50 0.35 86
RD.ORIF.BHE. 2021-12-10T00:21:59.88 0.6 undecidable manual S 282 69.375 50 -0.42 43
GU.RSP.HHZ. 2021-12-10T00:21:57.18 0.1 undecidable manual S 45 57.1983 50 0.14 94
GU.LSD.HHZ. 2021-12-10T00:21:53.47 1.0 undecidable manual P 22 80.5638 50 0.45 21
GU.PZZ.HHZ. 2021-12-10T00:21:53.06 0.1 undecidable manual S 137 42.8238 50 -0.15 96
GU.BHB.HHZ. 2021-12-10T00:21:52.53 0.1 undecidable manual S 82 41.2254 50 -0.24 95
RD.ORIF.BHE. 2021-12-10T00:21:51.82 0.1 undecidable manual P 282 69.375 50 0.51 85
GU.RSP.HHZ. 2021-12-10T00:21:49.79 0.6 undecidable manual P 45 57.1983 50 0.37 45
MN.BNI.HHZ. 2021-12-10T00:21:49.18 0.6 undecidable manual S 350 29.748 50 -0.53 45
GU.PZZ.HHZ. 2021-12-10T00:21:47.19 0.1 undecidable manual P 137 42.8238 50 -0.02 99
GU.BHB.HHZ. 2021-12-10T00:21:47.11 0.3 undecidable manual P 82 41.2254 50 0.15 72
GU.RRL.HHZ. 2021-12-10T00:21:45.04 0.1 undecidable manual S 14 15.1737 123 -0.26 99
MN.BNI.HHZ. 2021-12-10T00:21:44.79 0.1 undecidable manual P 350 29.748 50 -0.4 93
GU.RRL.HHZ. 2021-12-10T00:21:42.84 0.1 undecidable manual P 14 15.1737 123 0.2 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
GU.RRL.HHE. ML:1.3 0.00019710509999999997 0.32 AML other m 2021-12-10T00:21:45.34
GU.RRL.HHN. ML:1.3 0.000179850815 0.12 AML other m 2021-12-10T00:21:45.24
GU.PZZ.HHN. ML:1.6 0.000127 0.92 AML other m 2021-12-10T00:21:53.15
GU.PZZ.HHE. ML:1.5 0.00009685 1.02 AML other m 2021-12-10T00:21:54.03
GU.BHB.HHN. ML:1.0 0.000027943900000000002 0.14 AML other m 2021-12-10T00:21:53.73
GU.BHB.HNN. ML:0.9 0.000025077737499999998 0.15 AML other m 2021-12-10T00:21:53.73
GU.BHB.HHE. ML:1.0 0.000031384379999999996 0.08 AML other m 2021-12-10T00:21:53.27
GU.BHB.HNE. ML:1.0 0.000028683069999999998 0.07 AML other m 2021-12-10T00:21:53.27
GU.RSP.HHN. ML:0.8 0.000016964004999999996 0.16 AML other m 2021-12-10T00:22:00.96
GU.RSP.HHE. ML:1.0 0.000018293384499999998 1.16 AML other m 2021-12-10T00:21:57.92
GU.LSD.HHE. ML:1.2 0.00002140328 1.9 AML other m 2021-12-10T00:22:03.66
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