Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.2 on date 16-07-2023 and time 15:59:31 (UTC) in region Confine Italia Francia (FRANCIA)

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

  • 16-07-2023 15:59:31 (UTC)
  • 16-07-2023 17:59:31 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.4240, 6.8800 at 14 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
Argentera CN 9 83 83
Acceglio CN 11 162 245
Pietraporzio CN 15 77 322
Prazzo CN 16 170 492
Canosio CN 16 80 572
Marmora CN 18 68 640
Sambuco CN 18 92 732

Municipalities with at least 50000 inhabitants

An earthquake occurred to
54 Km W of Cuneo (56081 inhabitants)
91 Km SW of Moncalieri (57294 inhabitants)
96 Km SW of Torino (890529 inhabitants)
99 Km NW of Sanremo (54807 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 2023-07-16
15:59:31		 44.424 6.8803 14 2023-07-16
16:15:00		 Sala Sismica INGV-Roma 119318861
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-07-16 15:59:31 ± 0.22
Latitude 44.4240 ± 0.0063
Longitude 6.8803 ± 0.0139
Depth (km) 14 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 119318861

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1140
Semi-minor axis of confidence ellipse (meter) 619
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 252
Circular confidence region, given by single value of horizontal uncertainty (meter) 1140.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 221
Number of associated phases, regardless of their use for origin computation 19
Number of defining phases 13
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.29
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.70956
Number of stations at which the event was observed 13
Number of stations from which data was used for origin computation 7
Magnitude information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.1
Num. used stations 10
Type of magnitude ML
Reference to an origin 119318861
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-07-16 16:15:00
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.FDMO.HHZ. 2023-07-16T16:01:40.10 3.0 undecidable manual Sn 1.74 0
IV.CRE.HHZ. 2023-07-16T16:01:17.91 3.0 undecidable manual Sn 2.96 0
IV.PTRJ.HHZ. 2023-07-16T16:01:07.29 3.0 undecidable manual Pn 2.47 0
IV.SEI.HHZ. 2023-07-16T16:01:06.27 3.0 undecidable manual Sn 3.55 0
IV.BDI.HHZ. 2023-07-16T16:00:14.56 3.0 positive manual Pn 0.3 0
GU.RORO.HHZ. 2023-07-16T16:00:01.74 3.0 undecidable manual Sn -2.54 0
FR.SAOF.HHZ.00 2023-07-16T15:59:53.04 0.3 undecidable manual S 132 72.2721 92 -0.17 88
GU.RRL.HHZ. 2023-07-16T15:59:48.49 0.3 undecidable manual S 353 55.5999 93 -0.28 90
GU.BHB.HHZ. 2023-07-16T15:59:48.53 0.3 undecidable manual S 33 54.7008 93 0 94
GU.ENR.HHZ. 2023-07-16T15:59:46.81 0.3 undecidable manual S 117 47.8188 94 0.11 94
GU.GBOS.HHZ. 2023-07-16T15:59:45.43 0.3 undecidable manual P 105 78.7656 92 0.41 83
FR.SAOF.HHZ.00 2023-07-16T15:59:44.16 0.3 undecidable manual P 132 72.2721 92 0.15 89
GU.STV.HHZ. 2023-07-16T15:59:44.19 0.6 undecidable manual S 119 40.5261 95 -0.57 56
GU.RRL.HHZ. 2023-07-16T15:59:41.02 0.3 undecidable manual P 353 55.5999 93 -0.43 87
GU.BHB.HHZ. 2023-07-16T15:59:41.99 0.3 undecidable manual P 33 54.7008 93 0.67 79
GU.ENR.HHZ. 2023-07-16T15:59:40.14 0.3 undecidable manual P 117 47.8188 94 -0.11 93
GU.PZZ.HHZ. 2023-07-16T15:59:39.57 0.3 undecidable manual S 64 20.7681 106 0.02 100
GU.STV.HHZ. 2023-07-16T15:59:38.97 0.3 undecidable manual P 119 40.5261 95 -0.17 93
GU.PZZ.HHZ. 2023-07-16T15:59:36.28 0.3 undecidable manual P 64 20.7681 106 0.16 97
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
GU.PZZ.HHN. ML:1.2 0.00011599999999999999 1.26 AML other m 2023-07-16T15:59:40.99
GU.PZZ.HHE. ML:1.3 0.000136 0.14 AML other m 2023-07-16T15:59:40.52
GU.STV.HHE. ML:1.1 0.00004175 1.38 AML other m 2023-07-16T15:59:45.29
GU.STV.HHN. ML:1.1 0.0000432 1.42 AML other m 2023-07-16T15:59:45.93
GU.ENR.HHE. ML:1.0 0.00003035 0.16 AML other m 2023-07-16T15:59:47.47
GU.ENR.HHN. ML:1.2 0.00004615 1.24 AML other m 2023-07-16T15:59:48.05
GU.RRL.HHN. ML:1.0 0.000026450000000000003 0.9 AML other m 2023-07-16T15:59:48.74
FR.SAOF.HHN.00 ML:1.2 0.000027450000000000003 0.64 AML other m 2023-07-16T15:59:54.46
FR.SAOF.HHE.00 ML:1.2 0.00002665 0.56 AML other m 2023-07-16T15:59:55.94
GU.RRL.HHE. ML:1.0 0.00002705 0.42 AML other m 2023-07-16T15:59:58.18
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