Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.4 on date 28-11-2023 and time 07:39:51 (Italy) in region Confine Italia Francia (FRANCIA)

A magnitude ML 1.4 earthquake occured in region: Confine Italia Francia (FRANCIA), on

  • 28-11-2023 06:39:51 (UTC)
  • 28-11-2023 07:39:51 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.1730, 7.1910 at 11 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 15 644 644
Aisone CN 16 248 892
Demonte CN 18 2003 2895
Entracque CN 18 774 3669

Municipalities with at least 50000 inhabitants

An earthquake occurred to
38 Km SW of Cuneo (56081 inhabitants)
62 Km NW of Sanremo (54807 inhabitants)
100 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 1.4 2023-11-28
06:39:51		 44.1733 7.1912 11 2023-11-28
06:48:39		 Sala Sismica INGV-Roma 123516221
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-11-28 06:39:51 ± 0.1
Latitude 44.1733 ± 0.0396
Longitude 7.1912 ± 0.0464
Depth (km) 11 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 123516221

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 5620
Semi-minor axis of confidence ellipse (meter) 960
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 320
Circular confidence region, given by single value of horizontal uncertainty (meter) 5620.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 193
Number of associated phases, regardless of their use for origin computation 20
Number of defining phases 20
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.34
Epicentral distance of station closest to the epicenter (degree) 0.12051
Epicentral distance of station farthest from the epicenter (degree) 0.97576
Number of stations at which the event was observed 13
Number of stations from which data was used for origin computation 13
Magnitude information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.2
Num. used stations 4
Type of magnitude ML
Reference to an origin 123516221
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-11-28 06:48:39
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
GU.CANO.HHZ. 2023-11-28T06:40:15.75 0.3 undecidable manual S 87 83.25 90 -0.27 64
GU.RORO.HHZ. 2023-11-28T06:40:12.56 0.1 undecidable manual S 95 69.9744 90 0.08 91
GU.IMI.HHZ. 2023-11-28T06:40:10.13 0.3 undecidable manual S 117 63.0924 90 -0.49 62
GU.RSP.HHE. 2023-11-28T06:40:09.84 0.3 undecidable manual P 3 108.3138 90 0.42 59
GU.RRL.HHE. 2023-11-28T06:40:06.67 0.1 undecidable manual P 339 88.7445 90 0.25 85
GU.CANO.HHZ. 2023-11-28T06:40:06.05 0.1 undecidable manual P 87 83.25 90 0.47 82
4P.IT06A.HHE. 2023-11-28T06:40:04.10 0.3 undecidable manual P 53 67.8765 90 0.9 54
GU.RORO.HHZ. 2023-11-28T06:40:03.72 0.1 undecidable manual P 95 69.9744 90 0.18 90
GU.BHB.HHZ. 2023-11-28T06:40:03.52 0.3 undecidable manual P 4 73.6707 90 -0.57 59
GU.PZZ.HHE. 2023-11-28T06:40:03.07 0.6 undecidable manual S 351 37.4292 90 -0.7 40
FR.SAOF.HHE.00 2023-11-28T06:40:02.37 0.6 undecidable manual S 126 35.5422 90 -0.9 37
GU.IMI.HHZ. 2023-11-28T06:40:02.54 0.1 undecidable manual P 117 63.0924 90 0.07 93
GU.GBOS.HHZ. 2023-11-28T06:40:00.88 0.1 undecidable manual P 81 52.1034 90 0.11 94
GU.BURY.HHE. 2023-11-28T06:40:00.32 0.3 undecidable manual P 146 52.3032 90 -0.48 64
FR.SAOF.HHE.00 2023-11-28T06:39:58.06 0.3 undecidable manual P 126 35.5422 90 -0.16 71
GU.ENR.HHZ. 2023-11-28T06:39:58.76 0.3 undecidable manual S 71 19.0698 90 -0.12 74
GU.PZZ.HHE. 2023-11-28T06:39:58.35 0.3 undecidable manual P 351 37.4292 90 -0.16 71
GU.STV.HHZ. 2023-11-28T06:39:57.26 0.1 undecidable manual S 53 13.3755 95 -0.09 100
GU.ENR.HHZ. 2023-11-28T06:39:55.83 0.1 undecidable manual P 71 19.0698 90 0.15 99
GU.STV.HHZ. 2023-11-28T06:39:54.96 0.1 undecidable manual P 53 13.3755 95 0.16 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
GU.GBOS.HHE. ML:1.6 0.00011009674 0.1184 AML other m 2023-11-28T06:40:09.01
GU.BHB.HHE. ML:1.3 0.000028942490000000002 0.0992 AML other m 2023-11-28T06:40:14.72
GU.BHB.HHN. ML:1.3 0.000031531685 0.2208 AML other m 2023-11-28T06:40:14.43
GU.BHB.HNE. ML:1.4 0.000035425895 0.2304 AML other m 2023-11-28T06:40:14.46
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