Earthquake with magnitude of ML 0.9 on date 27-11-2023 and time 10:20:31 (UTC) in region 1 km NE Rialto (SV)

A magnitude ML 0.9 earthquake occured in region: 1 km NE Rialto (SV), on

  • 27-11-2023 10:20:31 (UTC)
  • 27-11-2023 11:20:31 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.2250, 8.2790 at 12 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.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Rialto SV 1 564 564
Calice Ligure SV 3 1730 2294
Orco Feglino SV 4 890 3184
Magliolo SV 4 974 4158
Tovo San Giacomo SV 5 2582 6740
Giustenice SV 6 977 7717
Vezzi Portio SV 7 809 8526
Bormida SV 7 387 8913
Borgio Verezzi SV 7 2205 11118
Mallare SV 8 1146 12264
Finale Ligure SV 8 11711 23975
Pietra Ligure SV 8 8992 32967
Osiglia SV 9 444 33411
Loano SV 11 11407 44818
Boissano SV 11 2492 47310
Noli SV 11 2736 50046
Spotorno SV 11 3803 53849
Pallare SV 12 923 54772
Toirano SV 12 2644 57416
Bardineto SV 12 756 58172
Borghetto Santo Spirito SV 12 4948 63120
Calizzano SV 13 1475 64595
Quiliano SV 13 7232 71827
Altare SV 13 2108 73935
Vado Ligure SV 14 8336 82271
Bergeggi SV 14 1129 83400
Balestrino SV 14 595 83995
Murialdo SV 14 841 84836
Ceriale SV 15 5561 90397
Plodio SV 15 650 91047
Carcare SV 15 5587 96634
Cosseria SV 17 1105 97739
Castelvecchio di Rocca Barbena SV 17 145 97884
Millesimo SV 17 3383 101267
Roccavignale SV 17 752 102019
Erli SV 17 245 102264
Zuccarello SV 18 309 102573
Massimino SV 19 113 102686
Cisano sul Neva SV 19 2085 104771
Castelnuovo di Ceva CN 19 110 104881
Savona SV 19 61345 166226
Cengio SV 19 3563 169789
Cairo Montenotte SV 20 13269 183058
Perlo CN 20 116 183174

Municipalities with at least 50000 inhabitants

An earthquake occurred to
19 Km W of Savona (61345 inhabitants)
56 Km W of Genova (586655 inhabitants)
60 Km NE of Sanremo (54807 inhabitants)
61 Km E of Cuneo (56081 inhabitants)
75 Km S of Asti (76202 inhabitants)
81 Km SW of Alessandria (93943 inhabitants)
98 Km SE 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 0.9 2023-11-27
10:20:31
44.2248 8.2787 12 2023-11-27
10:24:34
Sala Sismica INGV-Roma 123489171
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-11-27 10:20:31 ± 0.29
Latitude 44.2248 ± 0.0216
Longitude 8.2787 ± 0.0289
Depth (km) 12 ± 3 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 123489171

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 2894
Semi-minor axis of confidence ellipse (meter) 1087
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 317
Circular confidence region, given by single value of horizontal uncertainty (meter) 2890.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 191
Number of associated phases, regardless of their use for origin computation 11
Number of defining phases 11
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.53
Epicentral distance of station closest to the epicenter (degree) 0.03417
Epicentral distance of station farthest from the epicenter (degree) 0.41908
Number of stations at which the event was observed 6
Number of stations from which data was used for origin computation 6
Magnitude information

ML:0.9

Field Value
Value 0.9
Uncertainty 0.2
Num. used stations 7
Type of magnitude ML
Reference to an origin 123489171
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-11-27 10:24:34
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
GU.PCP.HHZ. 2023-11-27T10:20:44.60 0.3 undecidable manual S 31 41.0256 92 -0.69 58
GU.GBOS.HHZ. 2023-11-27T10:20:42.70 0.6 undecidable manual S 273 34.9428 92 -0.98 36
GU.IMI.HHZ. 2023-11-27T10:20:40.64 0.1 undecidable manual P 222 46.5201 91 0.16 93
GU.PCP.HHZ. 2023-11-27T10:20:39.99 0.3 negative manual P 31 41.0256 92 0.36 68
GU.GBOS.HHZ. 2023-11-27T10:20:39.69 0.1 undecidable manual P 273 34.9428 92 0.99 72
GU.RORO.HHZ. 2023-11-27T10:20:38.96 0.6 undecidable manual S 234 20.9679 96 -1 35
IV.QLNO.HHZ. 2023-11-27T10:20:37.46 0.6 undecidable manual S 26 12.2766 116 -0.25 47
GU.RORO.HHZ. 2023-11-27T10:20:36.46 0.1 undecidable manual P 234 20.9679 96 -0.09 96
IV.QLNO.HHZ. 2023-11-27T10:20:35.55 0.1 undecidable manual P 26 12.2766 116 0.3 96
GU.CANO.HHZ. 2023-11-27T10:20:35.77 0.6 undecidable manual S 240 3.7962 157 -0.39 47
GU.CANO.HHZ. 2023-11-27T10:20:34.50 0.1 undecidable manual P 240 3.7962 157 0.14 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
GU.CANO.HHN. ML:0.9 0.00010825825 0.1408 AML other m 2023-11-27T10:20:35.99
GU.CANO.HHE. ML:1.1 0.00019304740500000002 0.256 AML other m 2023-11-27T10:20:36.34
IV.QLNO.HHE. ML:1.1 0.00014000000000000001 0.2 AML other m 2023-11-27T10:20:37.62
IV.QLNO.HHN. ML:0.9 0.00008334999999999999 0.34 AML other m 2023-11-27T10:20:37.60
GU.RORO.HHE. ML:0.7 0.000034430975 0.096 AML other m 2023-11-27T10:20:39.41
GU.RORO.HHN. ML:0.7 0.000035321464999999995 0.0768 AML other m 2023-11-27T10:20:39.09
GU.GBOS.HHE. ML:0.7 0.000021804595 0.16 AML other m 2023-11-27T10:20:42.93
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