Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.4 on date 16-02-2023 and time 23:35:01 (UTC) in region 2 km SW Monterosso Grana (CN)

A magnitude ML 2.4 earthquake occured in region: 2 km SW Monterosso Grana (CN), on

  • 16-02-2023 23:35:01 (UTC)
  • 17-02-2023 00:35:01 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.3950, 7.3100 at 13 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
Monterosso Grana CN 2 505 505
Pradleves CN 4 250 755
Valgrana CN 6 786 1541
Montemale di Cuneo CN 7 241 1782
Castelmagno CN 8 66 1848
Valloriate CN 8 109 1957
Rittana CN 9 109 2066
Demonte CN 9 2003 4069
Dronero CN 9 7035 11104
Cartignano CN 9 190 11294
Roccabruna CN 10 1585 12879
Caraglio CN 10 6836 19715
Bernezzo CN 10 4104 23819
Gaiola CN 10 582 24401
Moiola CN 10 234 24635
San Damiano Macra CN 11 430 25065
Villar San Costanzo CN 11 1547 26612
Aisone CN 11 248 26860
Roccasparvera CN 12 741 27601
Cervasca CN 13 5013 32614
Vignolo CN 13 2600 35214
Celle di Macra CN 14 100 35314
Vinadio CN 14 644 35958
Valdieri CN 15 935 36893
Macra CN 16 59 36952
Borgo San Dalmazzo CN 16 12468 49420
Roccavione CN 16 2761 52181
Valmala CN 17 52 52233
Roaschia CN 18 107 52340
Marmora CN 18 68 52408
Entracque CN 18 774 53182
Busca CN 19 10181 63363
Melle CN 19 292 63655
Stroppo CN 19 103 63758
Cuneo CN 19 56081 119839
Rossana CN 19 908 120747
Canosio CN 19 80 120827
Sambuco CN 19 92 120919
Robilante CN 20 2306 123225
Frassino CN 20 265 123490
Venasca CN 20 1437 124927
Brossasco CN 20 1084 126011

Municipalities with at least 50000 inhabitants

An earthquake occurred to
19 Km W of Cuneo (56081 inhabitants)
74 Km SW of Moncalieri (57294 inhabitants)
74 Km NW of Sanremo (54807 inhabitants)
81 Km SW of Torino (890529 inhabitants)
90 Km SW of Asti (76202 inhabitants)
94 Km W of Savona (61345 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 2.4 2023-02-16
23:35:01		 44.395 7.3102 13 2024-03-01
17:17:56		 Bollettino Sismico Italiano INGV 114664091
Reviewed
Rev100 		ML 2.4 2023-02-16
23:35:01		 44.3802 7.2968 11 2023-02-16
23:45:41		 Sala Sismica INGV-Roma 114499381
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-02-16 23:35:01 ± 0.15
Latitude 44.3950 ± 0.0081
Longitude 7.3102 ± 0.0126
Depth (km) 13 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 114664091

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1050
Semi-minor axis of confidence ellipse (meter) 454
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) 1050.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 122
Number of associated phases, regardless of their use for origin computation 38
Number of defining phases 38
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) 0.15019
Epicentral distance of station farthest from the epicenter (degree) 2.82027
Number of stations at which the event was observed 25
Number of stations from which data was used for origin computation 25
Magnitudes information

ML:2.4

Field Value
Value 2.4
Uncertainty 0.3
Num. used stations 50
Type of magnitude ML
Reference to an origin 114499381
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-02-16 23:45:41

ML:2.4

Field Value
Value 2.4
Uncertainty 0.3
Num. used stations 54
Type of magnitude ML
Reference to an origin 114664091
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2023-10-31 17:54:56
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
ST.RONC.EHZ. 2023-02-16T23:35:46.66 0.3 undecidable manual P 55 313.0533 54 -0.38 18
IV.MAGA.HHZ. 2023-02-16T23:35:45.12 0.3 undecidable manual P 58 301.6758 54 -0.5 17
GU.POPM.HHZ. 2023-02-16T23:35:42.09 0.3 undecidable manual P 97 276.7119 54 -0.42 23
RD.PGF.BHZ. 2023-02-16T23:35:36.94 0.3 undecidable manual P 146 245.865 54 -1.74 16
GU.PCP.HHZ. 2023-02-16T23:35:30.93 0.6 undecidable manual S 80 99.123 91 0.36 42
IV.QLNO.HHZ. 2023-02-16T23:35:26.04 0.6 undecidable manual S 95 82.5507 92 -0.1 44
IV.MRGE.HHZ. 2023-02-16T23:35:26.41 0.6 undecidable manual P 353 153.735 91 -0.36 36
GU.CANO.HHZ. 2023-02-16T23:35:24.43 0.3 undecidable manual S 105 76.4679 92 -0.1 68
GU.RRL.HHZ. 2023-02-16T23:35:23.36 0.6 undecidable manual S 325 71.373 92 0.2 45
GU.RNCA.HHZ. 2023-02-16T23:35:23.82 0.3 undecidable manual P 86 130.2696 91 0.68 53
RD.ORIF.BHZ. 2023-02-16T23:35:23.82 0.3 undecidable manual P 298 126.873 91 1.19 42
GU.CIRO.HHZ. 2023-02-16T23:35:22.41 0.6 undecidable manual P 8 135.3645 91 -1.53 22
GU.RORO.HHZ. 2023-02-16T23:35:22.02 0.3 undecidable manual S 117 67.7766 92 -0.19 68
GU.BURY.HHZ. 2023-02-16T23:35:22.72 0.6 undecidable manual S 164 70.7736 92 -0.28 45
GU.TRAV.HHZ. 2023-02-16T23:35:21.88 0.3 undecidable manual P 15 128.5713 91 -1 44
GU.LSD.HHZ. 2023-02-16T23:35:20.76 0.3 undecidable manual P 353 118.8921 91 -0.64 53
GU.PCP.HHZ. 2023-02-16T23:35:19.05 0.3 undecidable manual P 80 99.123 91 0.7 56
GU.ROTM.HHZ. 2023-02-16T23:35:19.80 0.3 undecidable manual P 58 96.5256 91 1.86 30
GU.MGRO.HHZ. 2023-02-16T23:35:18.91 0.3 undecidable manual S 134 55.5999 93 -0.06 71
IV.QLNO.HHZ. 2023-02-16T23:35:16.44 0.1 undecidable manual P 95 82.5507 92 0.65 79
FR.SAOF.HHZ.00 2023-02-16T23:35:16.42 0.6 undecidable manual S 157 49.3173 93 -0.86 38
GU.BHB.HHZ. 2023-02-16T23:35:16.05 0.6 undecidable manual S 356 49.0176 93 -1.16 32
GU.CANO.HHZ. 2023-02-16T23:35:15.35 0.1 undecidable manual P 105 76.4679 92 0.49 84
GU.GBOS.HHZ. 2023-02-16T23:35:15.84 0.3 undecidable manual S 112 45.3213 94 -0.39 68
GU.RSP.HHZ. 2023-02-16T23:35:15.32 0.3 undecidable manual P 358 83.6496 92 -0.64 57
GU.BURY.HHZ. 2023-02-16T23:35:14.28 0.3 undecidable manual P 164 70.7736 92 0.31 66
GU.RRL.HHZ. 2023-02-16T23:35:14.36 0.3 undecidable manual P 325 71.373 92 0.29 66
GU.RORO.HHZ. 2023-02-16T23:35:13.68 0.1 undecidable manual P 117 67.7766 92 0.16 91
GU.MGRO.HHZ. 2023-02-16T23:35:11.89 0.1 positive manual P 134 55.5999 93 0.24 92
GU.BHB.HHZ. 2023-02-16T23:35:10.45 0.1 undecidable manual P 356 49.0176 93 -0.18 93
FR.SAOF.HHZ.00 2023-02-16T23:35:10.86 0.1 positive manual P 157 49.3173 93 0.18 94
GU.GBOS.HHZ. 2023-02-16T23:35:10.42 0.1 positive manual P 112 45.3213 94 0.35 91
GU.PZZ.HHZ. 2023-02-16T23:35:09.50 0.3 undecidable manual S 309 19.7691 106 0.04 76
GU.ENR.HHZ. 2023-02-16T23:35:08.99 0.1 undecidable manual S 155 20.2686 105 -0.6 90
GU.STV.HHZ. 2023-02-16T23:35:07.92 0.1 undecidable manual S 176 16.6722 112 -0.76 86
GU.ENR.HHZ. 2023-02-16T23:35:06.41 0.1 undecidable manual P 155 20.2686 105 0.17 99
GU.PZZ.HHZ. 2023-02-16T23:35:06.60 0.1 positive manual P 309 19.7691 106 0.44 94
GU.STV.HHZ. 2023-02-16T23:35:05.83 0.1 positive manual P 176 16.6722 112 0.12 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
GU.STV.HHE. ML:3.0 0.008645 0.14 AML other m 2023-02-16T23:35:08.11
GU.STV.HHN. ML:2.7 0.00377 0.36 AML other m 2023-02-16T23:35:08.10
GU.ENR.HHE. ML:3.2 0.009505 0.06 AML other m 2023-02-16T23:35:09.40
GU.ENR.HHN. ML:3.0 0.007730000000000001 0.06 AML other m 2023-02-16T23:35:09.52
GU.PZZ.HHN. ML:3.2 0.01008 0.3 AML other m 2023-02-16T23:35:09.77
GU.PZZ.HHE. ML:3.0 0.00718 0.14 AML other m 2023-02-16T23:35:09.90
GU.GBOS.HHE. ML:2.8 0.00191 0.26 AML other m 2023-02-16T23:35:16.32
GU.GBOS.HHN. ML:2.9 0.0024 0.4 AML other m 2023-02-16T23:35:16.46
GU.BHB.HHE. ML:2.3 0.0005545 0.1 AML other m 2023-02-16T23:35:17.42
GU.BHB.HNN. ML:2.2 0.00043149999999999997 0.34 AML other m 2023-02-16T23:35:17.55
FR.SAOF.HHN.00 ML:2.3 0.0005785 0.66 AML other m 2023-02-16T23:35:17.43
GU.BHB.HHN. ML:2.2 0.00043400000000000003 0.12 AML other m 2023-02-16T23:35:17.71
FR.SAOF.HHE.00 ML:2.5 0.000833 0.46 AML other m 2023-02-16T23:35:17.55
GU.BHB.HNE. ML:2.3 0.000524 1.36 AML other m 2023-02-16T23:35:18.22
GU.MGRO.HHE. ML:2.6 0.0010465 0.3 AML other m 2023-02-16T23:35:19.33
GU.MGRO.HNN. ML:2.6 0.0009235 0.32 AML other m 2023-02-16T23:35:19.32
GU.MGRO.HNE. ML:2.6 0.001001 0.42 AML other m 2023-02-16T23:35:20.30
GU.MGRO.HHN. ML:2.6 0.0010409999999999998 0.44 AML other m 2023-02-16T23:35:20.32
GU.RORO.HHN. ML:2.6 0.0007740000000000001 0.18 AML other m 2023-02-16T23:35:23.10
GU.BURY.HHN. ML:2.4 0.0004185 0.58 AML other m 2023-02-16T23:35:23.07
GU.RORO.HHE. ML:2.6 0.000745 0.54 AML other m 2023-02-16T23:35:23.48
GU.BURY.HNE. ML:2.4 0.0003835 1.1 AML other m 2023-02-16T23:35:23.16
GU.BURY.HNN. ML:2.5 0.000493 1.3 AML other m 2023-02-16T23:35:23.07
GU.BURY.HHE. ML:2.5 0.0004755 1.28 AML other m 2023-02-16T23:35:23.72
GU.CANO.HHN. ML:2.9 0.001105 1.34 AML other m 2023-02-16T23:35:26.88
GU.RRL.HHE. ML:2.1 0.00021550000000000003 1.36 AML other m 2023-02-16T23:35:26.30
GU.CANO.HHE. ML:2.9 0.001135 0.82 AML other m 2023-02-16T23:35:26.38
GU.RRL.HHN. ML:2.2 0.000229 1.06 AML other m 2023-02-16T23:35:26.89
IV.QLNO.HHE. ML:2.6 0.0004934999999999999 0.42 AML other m 2023-02-16T23:35:27.14
IV.QLNO.HHN. ML:2.5 0.00043799999999999997 0.32 AML other m 2023-02-16T23:35:27.40
GU.RSP.HNE. ML:2.4 0.00033299999999999996 0.48 AML other m 2023-02-16T23:35:28.51
GU.RSP.HHE. ML:1.7 0.0000637 0.46 AML other m 2023-02-16T23:35:29.30
GU.RSP.HHN. ML:1.7 0.00006805 0.96 AML other m 2023-02-16T23:35:31.18
GU.RSP.HNN. ML:2.4 0.00036350000000000005 1.54 AML other m 2023-02-16T23:35:31.18
GU.PCP.HHE. ML:2.5 0.00029099999999999997 0.48 AML other m 2023-02-16T23:35:32.70
GU.ROTM.HHE. ML:3.2 0.001695 0.42 AML other m 2023-02-16T23:35:32.99
GU.ROTM.HHN. ML:3.3 0.002205 1.2 AML other m 2023-02-16T23:35:33.05
GU.PCP.HHN. ML:2.5 0.00033850000000000004 0.4 AML other m 2023-02-16T23:35:33.79
GU.LSD.HHN. ML:2.1 0.0001007 0.42 AML other m 2023-02-16T23:35:38.22
GU.LSD.HHE. ML:2.3 0.000152 0.24 AML other m 2023-02-16T23:35:40.35
GU.TRAV.HHE. ML:2.1 0.00007285 0.32 AML other m 2023-02-16T23:35:43.32
GU.RNCA.HHN. ML:2.3 0.00011795 0.42 AML other m 2023-02-16T23:35:43.47
RD.ORIF.BHE. ML:2.2 0.00011530000000000001 0.32 AML other m 2023-02-16T23:35:43.65
RD.ORIF.BHN. ML:2.2 0.00010059999999999999 0.96 AML other m 2023-02-16T23:35:44.69
GU.TRAV.HHN. ML:1.9 0.000056049999999999994 1.06 AML other m 2023-02-16T23:35:45.03
GU.CIRO.HHN. ML:1.6 0.0000231 0.42 AML other m 2023-02-16T23:35:45.14
GU.CIRO.HHE. ML:1.8 0.000033849999999999996 0.6 AML other m 2023-02-16T23:35:45.69
GU.RNCA.HHE. ML:2.3 0.00014150000000000002 0.52 AML other m 2023-02-16T23:35:46.65
IV.MRGE.HHE. ML:1.9 0.000036200000000000006 0.42 AML other m 2023-02-16T23:35:48.77
IV.MRGE.HHN. ML:2.0 0.000045600000000000004 0.54 AML other m 2023-02-16T23:35:49.58
ST.RONC.EHE. ML:2.5 0.0000367 1.16 AML other m 2023-02-16T23:36:05.21
RD.PGF.BHE. ML:2.0 0.0000222 0.44 AML other m 2023-02-16T23:36:05.90
RD.PGF.BHN. ML:1.9 0.00001635 1.04 AML other m 2023-02-16T23:36:06.94
ST.RONC.EHN. ML:2.7 0.00005665 0.9 AML other m 2023-02-16T23:36:08.66
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
Waveforms Seismic signals in miniseed + resp format Download