Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.2 on date 01-09-2021 and time 20:35:02 (UTC) in region Confine Italia Francia (FRANCIA)

A magnitude ML 1.2 earthquake occured in region: Confine Italia Francia (FRANCIA), on

  • 01-09-2021 20:35:02 (UTC)
  • 01-09-2021 22:35:02 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.7850, 6.5990 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

No Italian municipalities within 20 km distance.

Municipalities with at least 50000 inhabitants

An earthquake occurred to
87 Km W of Cuneo (56081 inhabitants)
89 Km W of Moncalieri (57294 inhabitants)
91 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 1.2 2021-09-01
20:35:02		 44.785 6.5987 10 2022-03-30
13:04:41		 Bollettino Sismico Italiano INGV 102055561
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-01 20:35:02 ± 0.26
Latitude 44.7850 ± 0.0099
Longitude 6.5987 ± 0.0139
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 102055561

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 982
Semi-minor axis of confidence ellipse (meter) 932
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 47
Circular confidence region, given by single value of horizontal uncertainty (meter) 980.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 149
Number of associated phases, regardless of their use for origin computation 27
Number of defining phases 14
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.36
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.77252
Number of stations at which the event was observed 21
Number of stations from which data was used for origin computation 8
Magnitude information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.2
Num. used stations 6
Type of magnitude ML
Reference to an origin 102055561
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-03-17 03:05:28
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.PTRJ.HHZ. 2021-09-01T20:36:28.13 3.0 undecidable manual Pn -0.32 0
IV.LPEL.HHZ. 2021-09-01T20:36:25.62 3.0 undecidable manual Pg 5.36 0
IV.FAGN.HHZ. 2021-09-01T20:36:24.50 3.0 positive manual Pg 11.04 0
IT.FIE.HGZ. 2021-09-01T20:36:17.00 3.0 undecidable manual Sg 1.96 0
IV.ARVD.HHZ. 2021-09-01T20:36:10.21 3.0 negative manual Pg 9.87 0
IV.GAVE.EHZ. 2021-09-01T20:36:04.73 3.0 undecidable manual Pn 0.31 0
IV.ZONE.HHZ. 2021-09-01T20:35:58.31 3.0 undecidable manual Sn 0.38 0
IV.AGLI.HHZ. 2021-09-01T20:35:48.95 3.0 undecidable manual Pn -8.47 0
GU.GSCL.HHZ. 2021-09-01T20:35:38.69 3.0 positive manual Pg 4.08 0
IV.NDIM.HHZ. 2021-09-01T20:35:37.47 3.0 negative manual Pg 0.18 0
IV.VARE.HHZ. 2021-09-01T20:35:31.83 3.0 undecidable manual Pg 6.29 0
GU.STV.HHN. 2021-09-01T20:35:28.36 0.6 undecidable manual S 136 83.0502 50 0.48 42
GU.LSD.HHZ. 2021-09-01T20:35:28.74 0.6 undecidable manual S 29 85.7475 50 0.14 44
RD.ORIF.BHE. 2021-09-01T20:35:20.70 0.6 undecidable manual S 285 58.3971 50 -0.6 42
GU.LSD.HHZ. 2021-09-01T20:35:18.25 0.3 undecidable manual P 29 85.7475 50 0.5 62
GU.PZZ.HHZ. 2021-09-01T20:35:18.43 0.6 undecidable manual S 127 51.2154 50 -0.94 37
IV.EUCT.HNZ. 2021-09-01T20:35:17.73 3.0 undecidable manual P -3.96 0
GU.STV.HHN. 2021-09-01T20:35:17.74 0.3 undecidable manual P 136 83.0502 50 0.4 63
GU.RSP.HHZ. 2021-09-01T20:35:15.34 0.3 undecidable manual P 52 65.9895 50 0.63 61
GU.RNCA.HHZ. 2021-09-01T20:35:13.49 3.0 negative manual P -5.03 0
RD.ORIF.BHE. 2021-09-01T20:35:13.81 0.1 undecidable manual P 285 58.3971 50 0.27 91
MN.BNI.HHN. 2021-09-01T20:35:13.43 0.6 undecidable manual S 12 30.2475 50 -0.35 47
GU.PZZ.HHZ. 2021-09-01T20:35:12.08 0.3 undecidable manual P 127 51.2154 50 -0.35 68
GU.BHB.HHZ. 2021-09-01T20:35:12.42 0.3 undecidable manual P 84 52.6029 50 -0.22 70
GU.RRL.HHE. 2021-09-01T20:35:10.94 0.6 undecidable manual S 45 21.2676 114 -0.12 50
MN.BNI.HHN. 2021-09-01T20:35:09.03 0.3 undecidable manual P 12 30.2475 50 -0.17 74
GU.RRL.HHE. 2021-09-01T20:35:07.48 0.1 undecidable manual P 45 21.2676 114 -0.15 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
GU.PZZ.HHN. ML:1.3 0.0000538 0.42 AML other m 2021-09-01T20:35:19.27
GU.PZZ.HHE. ML:1.3 0.0000564 0.26 AML other m 2021-09-01T20:35:19.67
GU.RSP.HHN. ML:0.9 0.0000162 0.48 AML other m 2021-09-01T20:35:24.70
GU.RSP.HHE. ML:1.0 0.000017899999999999998 0.68 AML other m 2021-09-01T20:35:25.49
GU.LSD.HHN. ML:1.1 0.00001415 0.22 AML other m 2021-09-01T20:35:29.30
GU.LSD.HHE. ML:1.3 0.000023800000000000003 0.26 AML other m 2021-09-01T20:35:30.20
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