Earthquake with magnitude of ML 0.9 on date 27-11-2023 and time 11:00:13 (Italy) in region 2 km SE Osiglia (SV)

A magnitude ML 0.9 earthquake occured in region: 2 km SE Osiglia (SV), on

  • 27-11-2023 10:00:13 (UTC)
  • 27-11-2023 11:00:13 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.2700, 8.2140 at 9 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
Osiglia SV 2 444 444
Bormida SV 2 387 831
Murialdo SV 7 841 1672
Mallare SV 7 1146 2818
Rialto SV 7 564 3382
Pallare SV 8 923 4305
Calizzano SV 9 1475 5780
Magliolo SV 9 974 6754
Calice Ligure SV 10 1730 8484
Plodio SV 10 650 9134
Roccavignale SV 10 752 9886
Orco Feglino SV 11 890 10776
Millesimo SV 11 3383 14159
Bardineto SV 11 756 14915
Giustenice SV 11 977 15892
Cosseria SV 11 1105 16997
Tovo San Giacomo SV 11 2582 19579
Castelnuovo di Ceva CN 12 110 19689
Carcare SV 12 5587 25276
Massimino SV 12 113 25389
Perlo CN 13 116 25505
Vezzi Portio SV 13 809 26314
Altare SV 13 2108 28422
Cengio SV 13 3563 31985
Montezemolo CN 13 259 32244
Bagnasco CN 14 1035 33279
Borgio Verezzi SV 14 2205 35484
Pietra Ligure SV 15 8992 44476
Nucetto CN 15 430 44906
Boissano SV 15 2492 47398
Finale Ligure SV 15 11711 59109
Priero CN 15 529 59638
Cairo Montenotte SV 15 13269 72907
Priola CN 15 701 73608
Toirano SV 16 2644 76252
Loano SV 16 11407 87659
Quiliano SV 16 7232 94891
Balestrino SV 16 595 95486
Saliceto CN 16 1323 96809
Garessio CN 17 3244 100053
Erli SV 17 245 100298
Spotorno SV 17 3803 104101
Battifollo CN 17 219 104320
Castelvecchio di Rocca Barbena SV 17 145 104465
Borghetto Santo Spirito SV 17 4948 109413
Noli SV 18 2736 112149
Sale delle Langhe CN 18 486 112635
Vado Ligure SV 18 8336 120971
Sale San Giovanni CN 18 183 121154
Camerana CN 18 631 121785
Bergeggi SV 19 1129 122914
Lisio CN 19 201 123115
Ceva CN 19 5782 128897
Zuccarello SV 19 309 129206
Ceriale SV 19 5561 134767
Scagnello CN 19 194 134961
Viola CN 20 391 135352

Municipalities with at least 50000 inhabitants

An earthquake occurred to
22 Km W of Savona (61345 inhabitants)
55 Km E of Cuneo (56081 inhabitants)
59 Km W of Genova (586655 inhabitants)
61 Km NE of Sanremo (54807 inhabitants)
70 Km S of Asti (76202 inhabitants)
78 Km SW of Alessandria (93943 inhabitants)
92 Km SE of Moncalieri (57294 inhabitants)
99 Km SE of Torino (890529 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
10:00:13
44.2702 8.2145 9 2023-11-27
10:06:24
Sala Sismica INGV-Roma 123488581
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-11-27 10:00:13 ± 0.24
Latitude 44.2702 ± 0.0207
Longitude 8.2145 ± 0.0201
Depth (km) 9 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 123488581

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 2462
Semi-minor axis of confidence ellipse (meter) 971
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 153
Circular confidence region, given by single value of horizontal uncertainty (meter) 2460.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 137
Number of associated phases, regardless of their use for origin computation 13
Number of defining phases 10
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.52
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.35973
Number of stations at which the event was observed 8
Number of stations from which data was used for origin computation 5
Magnitude information

ML:0.9

Field Value
Value 0.9
Uncertainty 0.2
Num. used stations 6
Type of magnitude ML
Reference to an origin 123488581
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-11-27 10:06:24
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
GU.SATI.HHZ. 2023-11-27T10:00:45.51 3.0 undecidable manual P 1.67 0
GU.STV.HHZ. 2023-11-27T10:00:28.24 3.0 positive manual P 0.45 0
GU.PCP.HHZ. 2023-11-27T10:00:26.59 0.6 undecidable manual S 41 39.9267 50 -0.77 40
GU.GBOS.HHZ. 2023-11-27T10:00:24.60 0.6 undecidable manual S 264 29.9478 106 0.03 50
GU.IMI.HHZ. 2023-11-27T10:00:23.14 3.0 undecidable manual P -0.63 0
GU.PCP.HHZ. 2023-11-27T10:00:21.88 0.1 undecidable manual P 41 39.9267 50 0.27 93
GU.RORO.HHZ. 2023-11-27T10:00:20.84 0.6 undecidable manual S 214 21.0678 113 -0.84 40
GU.GBOS.HHZ. 2023-11-27T10:00:19.96 0.1 undecidable manual P 264 29.9478 106 -0.04 99
GU.RORO.HHZ. 2023-11-27T10:00:18.40 0.1 positive manual P 214 21.0678 113 0.07 100
IV.QLNO.HHE. 2023-11-27T10:00:18.04 0.3 undecidable manual S 60 12.0768 126 -0.88 60
GU.CANO.HHZ. 2023-11-27T10:00:17.70 0.6 undecidable manual S 165 7.1928 141 0.01 52
IV.QLNO.HHE. 2023-11-27T10:00:17.56 0.1 undecidable manual P 60 12.0768 126 0.82 81
GU.CANO.HHZ. 2023-11-27T10:00:16.45 0.6 undecidable manual P 165 7.1928 141 0.42 48
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
GU.CANO.HHE. ML:1.2 0.00027100000000000003 0.38 AML other m 2023-11-27T10:00:18.23
GU.CANO.HHN. ML:1.1 0.0001885 0.32 AML other m 2023-11-27T10:00:18.42
GU.RORO.HHN. ML:0.8 0.000048299999999999995 0.56 AML other m 2023-11-27T10:00:20.97
GU.RORO.HHE. ML:0.8 0.00004495 1.14 AML other m 2023-11-27T10:00:21.65
GU.GBOS.HHE. ML:0.8 0.000028584430000000002 0.1792 AML other m 2023-11-27T10:00:25.32
GU.GBOS.HHN. ML:0.7 0.000025951445 0.1792 AML other m 2023-11-27T10:00:25.33
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