Istituto Nazionale di Geofisica e Vulcanologia

Earthquake (landslide) with magnitude of ML 1.8 on date 03-01-2023 and time 00:13:11 (Italy) in region 3 km NW Valgrisenche (AO)

A magnitude ML 1.8 (landslide) earthquake occured in region: 3 km NW Valgrisenche (AO), on

  • 02-01-2023 23:13:11 (UTC)
  • 03-01-2023 00:13:11 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 45.6540, 7.0370 at 0 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

Event type: landslide.

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.

Hai sentito il terremoto? Clicca qui

Did you feel it? Fill in the questionnaire.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Valgrisenche AO 3 196 196
Rhêmes-Saint-Georges AO 9 194 390
La Thuile AO 10 761 1151
Avise AO 10 305 1456
La Salle AO 11 2087 3543
Rhêmes-Notre-Dame AO 11 89 3632
Morgex AO 12 2104 5736
Arvier AO 12 873 6609
Introd AO 13 658 7267
Saint-Nicolas AO 13 311 7578
Pré-Saint-Didier AO 13 1050 8628
Villeneuve AO 15 1289 9917
Valsavarenche AO 15 161 10078
Saint-Pierre AO 16 3165 13243
Courmayeur AO 16 2807 16050
Aymavilles AO 17 2086 18136
Sarre AO 19 4927 23063
Jovençan AO 20 736 23799

Municipalities with at least 50000 inhabitants

An earthquake occurred to
82 Km NW of Torino (890529 inhabitants)
89 Km NW 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 1.8 2023-01-02
23:13:11		 45.6537 7.0367 1 2024-03-01
17:18:10		 Bollettino Sismico Italiano INGV 117966461
Reviewed
Rev100 		ML 1.8 2023-01-02
23:13:17		 45.6578 7.1015 6 2023-01-02
23:20:28		 Sala Sismica INGV-Roma 113267041
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-01-02 23:13:11 ± 0.2
Latitude 45.6537 ± 0.0099
Longitude 7.0367 ± 0.0257
Depth (km) 1 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type landslide
Origin ID 117966461

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1990
Semi-minor axis of confidence ellipse (meter) 1110
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 276
Circular confidence region, given by single value of horizontal uncertainty (meter) 1990.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 101
Number of associated phases, regardless of their use for origin computation 15
Number of defining phases 15
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.44
Epicentral distance of station closest to the epicenter (degree) 0.11691
Epicentral distance of station farthest from the epicenter (degree) 1.14753
Number of stations at which the event was observed 15
Number of stations from which data was used for origin computation 15
Magnitudes information

ML:1.8

Field Value
Value 1.8
Uncertainty 0.2
Num. used stations 28
Type of magnitude ML
Reference to an origin 117966461
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2023-07-29 03:01:01

ML:1.8

Field Value
Value 1.8
Uncertainty 0.3
Num. used stations 28
Type of magnitude ML
Reference to an origin 113267041
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-01-02 23:20:28
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
GU.PZZ.HHZ. 2023-01-02T23:13:34.07 0.3 undecidable manual P 177 127.3725 50 -0.27 80
RD.ORIF.BHZ. 2023-01-02T23:13:34.99 1.0 undecidable manual P 228 121.6893 50 1.54 16
CH.GIMEL.HHZ. 2023-01-02T23:13:33.12 0.3 undecidable manual P 329 114.1968 50 0.81 69
GU.BHB.HHZ. 2023-01-02T23:13:29.25 0.3 undecidable manual P 169 92.4408 50 0.3 86
CH.MMK.HHN. 2023-01-02T23:13:27.05 0.6 undecidable manual P 58 84.0492 50 -0.62 53
GU.RRL.HHZ. 2023-01-02T23:13:26.89 0.3 undecidable manual P 193 83.5497 50 -0.68 78
GU.SATI.HHZ. 2023-01-02T23:13:26.54 0.6 undecidable manual P 69 68.8755 50 1.22 42
GU.RSP.HHZ. 2023-01-02T23:13:24.46 0.6 undecidable manual P 162 58.7967 90 0.75 53
MN.BNI.HHZ. 2023-01-02T23:13:24.92 0.6 undecidable manual P 203 72.372 50 -0.93 48
GU.TRAV.HHZ. 2023-01-02T23:13:23.48 0.6 undecidable manual P 106 57.2982 90 0.07 64
CH.DIX.HHZ. 2023-01-02T23:13:23.52 0.6 undecidable manual P 31 55.3002 91 0.51 58
GU.CIRO.HHZ. 2023-01-02T23:13:20.02 0.3 undecidable manual P 98 41.625 91 -0.25 95
GU.REMY.HHZ. 2023-01-02T23:13:16.10 0.3 undecidable manual P 24 22.4553 91 -0.32 97
GU.LSD.HHZ. 2023-01-02T23:13:16.67 0.3 undecidable manual P 161 22.8549 91 0.17 100
IV.MRGE.HHZ. 2023-01-02T23:13:14.13 0.3 undecidable manual P 8 12.9759 92 -0.41 97
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
GU.LSD.HHE. ML:1.6 0.00028300000000000005 0.54 AML other m 2023-01-02T23:13:27.46
GU.LSD.HHN. ML:1.6 0.000259 1.02 AML other m 2023-01-02T23:13:27.25
GU.CIRO.HHN. ML:1.4 0.0000969 1.68 AML other m 2023-01-02T23:13:32.02
GU.TRAV.HHE. ML:1.7 0.0001125 0.74 AML other m 2023-01-02T23:13:36.65
GU.TRAV.HHN. ML:1.9 0.00016499999999999997 1.6 AML other m 2023-01-02T23:13:37.12
GU.CIRO.HHE. ML:1.3 0.00007364999999999999 0.76 AML other m 2023-01-02T23:13:37.30
GU.RSP.HNN. ML:2.2 0.00036650000000000007 1.18 AML other m 2023-01-02T23:13:37.04
GU.RSP.HNE. ML:2.3 0.000397 1.3 AML other m 2023-01-02T23:13:37.00
CH.DIX.HHN. ML:2.1 0.0003135 0.68 AML other m 2023-01-02T23:13:37.45
CH.DIX.HHE. ML:2.0 0.000243 1.38 AML other m 2023-01-02T23:13:39.08
GU.RSP.HHN. ML:1.4 0.000055 1.36 AML other m 2023-01-02T23:13:40.09
MN.BNI.HHN. ML:1.4 0.00004455 0.36 AML other m 2023-01-02T23:13:41.61
MN.BNI.HHE. ML:1.5 0.00005 1.06 AML other m 2023-01-02T23:13:42.26
GU.RSP.HHE. ML:1.4 0.0000557 1.46 AML other m 2023-01-02T23:13:42.99
GU.SATI.HHN. ML:1.6 0.0000642 1.22 AML other m 2023-01-02T23:13:43.10
GU.RRL.HHN. ML:1.8 0.00007885 1.02 AML other m 2023-01-02T23:13:44.31
GU.SATI.HHE. ML:1.5 0.000056349999999999994 0.66 AML other m 2023-01-02T23:13:45.94
GU.RRL.HHE. ML:1.9 0.00010095 0.86 AML other m 2023-01-02T23:13:47.47
GU.BHB.HHE. ML:1.8 0.000072 0.54 AML other m 2023-01-02T23:13:47.20
GU.BHB.HNE. ML:1.9 0.00008265 1.36 AML other m 2023-01-02T23:13:47.21
GU.BHB.HHN. ML:1.9 0.00009295000000000001 0.42 AML other m 2023-01-02T23:13:48.09
GU.BHB.HNN. ML:1.9 0.00009145 0.44 AML other m 2023-01-02T23:13:48.09
GU.PZZ.HHN. ML:2.0 0.00007035 1.06 AML other m 2023-01-02T23:13:56.44
CH.GIMEL.HHN. ML:1.7 0.0000399 1.04 AML other m 2023-01-02T23:13:56.47
RD.ORIF.BHE. ML:1.8 0.000048549999999999994 1.56 AML other m 2023-01-02T23:14:00.07
CH.GIMEL.HHE. ML:1.8 0.0000499 0.4 AML other m 2023-01-02T23:14:00.58
GU.PZZ.HHE. ML:2.1 0.0000897 0.44 AML other m 2023-01-02T23:14:03.44
RD.ORIF.BHN. ML:1.7 0.0000407 0.68 AML other m 2023-01-02T23:14:07.39
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