Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.1 on date 24-09-2021 and time 12:58:30 (UTC) in region 5 km SE Frabosa Soprana (CN)

A magnitude ML 1.1 earthquake occured in region: 5 km SE Frabosa Soprana (CN), on

  • 24-09-2021 12:58:30 (UTC)
  • 24-09-2021 14:58:30 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.2480, 7.8300 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
Frabosa Soprana CN 5 759 759
Frabosa Sottana CN 7 1497 2256
Pamparato CN 8 302 2558
Roburent CN 8 495 3053
Montaldo di Mondovì CN 9 557 3610
Monastero di Vasco CN 10 1297 4907
Roccaforte Mondovì CN 10 2085 6992
Villanova Mondovì CN 12 5792 12784
Viola CN 12 391 13175
Ormea CN 13 1617 14792
Monasterolo Casotto CN 13 89 14881
Torre Mondovì CN 13 498 15379
Lisio CN 14 201 15580
Vicoforte CN 15 3136 18716
Chiusa di Pesio CN 15 3676 22392
Priola CN 15 701 23093
Mondovì CN 16 22484 45577
Scagnello CN 16 194 45771
San Michele Mondovì CN 16 2003 47774
Battifollo CN 17 219 47993
Pianfei CN 17 2202 50195
Briaglia CN 17 318 50513
Garessio CN 17 3244 53757
Mombasiglio CN 17 609 54366
Caprauna CN 18 104 54470
Bagnasco CN 18 1035 55505
Armo IM 19 111 55616
Cosio d'Arroscia IM 19 221 55837
Mendatica IM 19 185 56022
Peveragno CN 19 5543 61565
Briga Alta CN 19 39 61604
Beinette CN 20 3423 65027
Pornassio IM 20 685 65712
Niella Tanaro CN 20 1046 66758

Municipalities with at least 50000 inhabitants

An earthquake occurred to
27 Km SE of Cuneo (56081 inhabitants)
48 Km N of Sanremo (54807 inhabitants)
52 Km W of Savona (61345 inhabitants)
78 Km SW of Asti (76202 inhabitants)
85 Km S of Moncalieri (57294 inhabitants)
90 Km W of Genova (586655 inhabitants)
93 Km S of Torino (890529 inhabitants)
97 Km SW of Alessandria (93943 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 1.1 2021-09-24
12:58:30		 44.2483 7.8297 11 2021-09-24
13:20:24		 Sala Sismica INGV-Roma 95832731
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-24 12:58:30 ± 0.08
Latitude 44.2483 ± 0.0009
Longitude 7.8297 ± 0.0025
Depth (km) 11 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 95832731

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 719
Semi-minor axis of confidence ellipse (meter) 203
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 310
Circular confidence region, given by single value of horizontal uncertainty (meter) 200.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 55
Number of associated phases, regardless of their use for origin computation 26
Number of defining phases 26
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.31
Epicentral distance of station closest to the epicenter (degree) 0.00989
Epicentral distance of station farthest from the epicenter (degree) 0.82828
Number of stations at which the event was observed 14
Number of stations from which data was used for origin computation 14
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.2
Num. used stations 17
Type of magnitude ML
Reference to an origin 95832731
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-09-24 13:20:24
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
GU.BHB.HHZ. 2021-09-24T12:58:53.60 0.6 undecidable manual S 326 79.0653 50 -0.69 39
GU.PCP.HHZ. 2021-09-24T12:58:50.78 0.6 undecidable manual S 60 65.3901 50 0.14 45
GU.PZZ.HHE. 2021-09-24T12:58:50.39 0.6 undecidable manual S 297 63.492 50 0.27 45
IV.MONC.HHE. 2021-09-24T12:58:46.87 0.1 undecidable manual P 5 91.9413 50 0.57 77
GU.BHB.HHZ. 2021-09-24T12:58:44.55 0.3 negative manual P 326 79.0653 50 0.23 65
GU.STV.HHE. 2021-09-24T12:58:43.22 0.6 undecidable manual S 270 40.0266 50 -0.65 42
GU.IMI.HHZ. 2021-09-24T12:58:43.25 0.6 undecidable manual S 172 37.8288 50 -0.03 49
IV.QLNO.HHZ. 2021-09-24T12:58:43.72 0.6 undecidable manual S 78 41.8248 50 -0.64 43
GU.PCP.HHZ. 2021-09-24T12:58:42.53 0.6 undecidable manual P 60 65.3901 50 0.32 43
FR.SAOF.HHE. 2021-09-24T12:58:42.89 0.6 undecidable manual S 217 36.5412 50 -0.04 49
GU.BURY.HHE. 2021-09-24T12:58:41.28 0.1 undecidable manual P 203 56.0994 50 0.51 86
GU.ENR.HHE. 2021-09-24T12:58:41.27 0.6 undecidable manual S 266 32.745 50 -0.67 42
GU.CANO.HHZ. 2021-09-24T12:58:41.15 0.3 undecidable manual S 98 32.745 50 -0.77 62
GU.PZZ.HHE. 2021-09-24T12:58:41.75 0.1 undecidable manual P 297 63.492 50 -0.16 91
GU.MGRO.HHZ. 2021-09-24T12:58:39.32 0.6 undecidable manual S 184 22.8549 50 0.02 50
GU.IMI.HHZ. 2021-09-24T12:58:38.34 0.6 undecidable manual P 172 37.8288 50 0.38 46
IV.QLNO.HHZ. 2021-09-24T12:58:38.73 0.1 negative manual P 78 41.8248 50 0.15 94
GU.STV.HHE. 2021-09-24T12:58:38.41 0.1 undecidable manual P 270 40.0266 50 0.11 96
GU.RORO.HHZ. 2021-09-24T12:58:38.98 0.6 undecidable manual S 129 24.1536 50 -0.65 44
FR.SAOF.HHE. 2021-09-24T12:58:37.81 0.1 undecidable manual P 217 36.5412 50 0.05 98
GU.ENR.HHE. 2021-09-24T12:58:37.02 0.1 undecidable manual P 266 32.745 50 -0.17 96
GU.CANO.HHZ. 2021-09-24T12:58:37.12 1.0 undecidable manual P 98 32.745 50 -0.05 25
GU.RORO.HHZ. 2021-09-24T12:58:35.88 0.1 undecidable manual P 129 24.1536 50 0.03 100
GU.MGRO.HHZ. 2021-09-24T12:58:35.95 0.1 positive manual P 184 22.8549 50 0.29 95
GU.GBOS.HHZ. 2021-09-24T12:58:34.05 0.6 undecidable manual S 132 1.0989 174 -0.45 47
GU.GBOS.HHZ. 2021-09-24T12:58:32.83 0.6 undecidable manual P 132 1.0989 174 -0.06 52
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
GU.GBOS.HHN. ML:1.2 0.000292 0.12 AML other m 2021-09-24T12:58:34.13
GU.GBOS.HHE. ML:1.4 0.000443 0.14 AML other m 2021-09-24T12:58:34.14
GU.MGRO.HHE. ML:1.1 0.00008125 1.86 AML other m 2021-09-24T12:58:40.99
GU.MGRO.HHN. ML:0.8 0.00004031362 0.1216 AML other m 2021-09-24T12:58:40.69
IV.QLNO.HHN. ML:1.2 0.000055885319 0.1408 AML other m 2021-09-24T12:58:43.70
IV.QLNO.HHE. ML:1.0 0.00003400508 0.1408 AML other m 2021-09-24T12:58:43.85
GU.RORO.HHE. ML:1.8 0.00033689544999999997 0.7232 AML other m 2021-09-24T12:58:40.37
GU.RORO.HHN. ML:1.1 0.0000692228 0.1024 AML other m 2021-09-24T12:58:39.23
GU.MGRO.HNN. ML:0.9 0.000051335199999999996 0.2688 AML other m 2021-09-24T12:58:40.56
GU.CANO.HHN. ML:1.2 0.000071933475 0.16 AML other m 2021-09-24T12:58:41.49
GU.CANO.HHE. ML:1.4 0.00010525175000000001 0.6784 AML other m 2021-09-24T12:58:41.29
GU.IMI.HHN. ML:0.8 0.00002533247 0.1216 AML other m 2021-09-24T12:58:43.76
GU.IMI.HHE. ML:0.9 0.000029525385000000003 0.224 AML other m 2021-09-24T12:58:44.36
GU.PCP.HHN. ML:0.7 0.000012190471000000002 0.864 AML other m 2021-09-24T12:58:51.72
GU.BHB.HHE. ML:1.0 0.000016916435000000002 0.2048 AML other m 2021-09-24T12:58:53.76
GU.BHB.HHN. ML:0.8 0.000007906699 0.4992 AML other m 2021-09-24T12:58:54.36
GU.BHB.HNE. ML:1.2 0.000020042515000000004 1.1584 AML other m 2021-09-24T12:58:53.77
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