INGVCENTRO​NAZIONALE​TERREMOTI
Sala Sismica

Earthquake with magnitude of ML 0.5 on date 04-12-2018 and time 14:46:30 (Italy) in region 2 km SW Bagnasco (CN)

A magnitude ML 0.5 earthquake occured in region: 2 km SW Bagnasco (CN), on

  • 04-12-2018 13:46:30 (UTC)
  • 04-12-2018 14:46:30 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.29, 8.04 at 8 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
Bagnasco CN 2 1035 1035
Massimino SV 3 113 1148
Battifollo CN 4 219 1367
Priola CN 5 701 2068
Lisio CN 5 201 2269
Viola CN 5 391 2660
Nucetto CN 6 430 3090
Scagnello CN 6 194 3284
Perlo CN 7 116 3400
Calizzano SV 9 1475 4875
Monasterolo Casotto CN 9 89 4964
Pamparato CN 10 302 5266
Garessio CN 10 3244 8510
Mombasiglio CN 10 609 9119
Murialdo SV 11 841 9960
Castelnuovo di Ceva CN 11 110 10070
Priero CN 11 529 10599
Ceva CN 11 5782 16381
Roburent CN 12 495 16876
Bardineto SV 13 756 17632
Torre Mondovì CN 13 498 18130
Sale delle Langhe CN 13 486 18616
Sale San Giovanni CN 13 183 18799
Osiglia SV 13 444 19243
Montezemolo CN 13 259 19502
Montaldo di Mondovì CN 14 557 20059
Lesegno CN 14 794 20853
San Michele Mondovì CN 14 2003 22856
Roascio CN 15 97 22953
Roccavignale SV 15 752 23705
Bormida SV 16 387 24092
Millesimo SV 16 3383 27475
Torresina CN 16 52 27527
Castellino Tanaro CN 16 312 27839
Paroldo CN 17 211 28050
Vicoforte CN 17 3136 31186
Niella Tanaro CN 17 1046 32232
Briaglia CN 18 318 32550
Erli SV 18 245 32795
Camerana CN 18 631 33426
Saliceto CN 18 1323 34749
Igliano CN 18 74 34823
Cengio SV 18 3563 38386
Monastero di Vasco CN 18 1297 39683
Ormea CN 18 1617 41300
Frabosa Soprana CN 18 759 42059
Cosseria SV 18 1105 43164
Plodio SV 18 650 43814
Castelvecchio di Rocca Barbena SV 18 145 43959
Cigliè CN 19 190 44149
Rocca Cigliè CN 19 142 44291
Nasino SV 19 207 44498
Frabosa Sottana CN 19 1497 45995
Marsaglia CN 19 245 46240
Castelbianco SV 19 330 46570
Pallare SV 20 923 47493
Alto CN 20 128 47621
Caprauna CN 20 104 47725

Municipalities with at least 50000 inhabitants

An earthquake occurred to
36 Km W of Savona (61345 inhabitants)
40 Km E of Cuneo (56081 inhabitants)
55 Km NE of Sanremo (54807 inhabitants)
70 Km S of Asti (76202 inhabitants)
73 Km W of Genova (586655 inhabitants)
84 Km SW of Alessandria (93943 inhabitants)
84 Km SE of Moncalieri (57294 inhabitants)
92 Km SE of Torino (890529 inhabitants)
Recent and historical Seismicity
Seismic hazard
Shakemap
Felt maps
The earthquake effects in MCS scale as obtained from the compiled questionnaire

The earthquake effects in MCS scale as obtained from the compiled questionnaire

This map shows the distribution of the effects of the earthquake on the territory in terms of the MCS (Mercalli-Cancani-Sieberg) intensity scale. The intensities are determined using the data provided in the questionnaire (http://www.haisentitoilterremoto.it/) that are analysed using robust statistical techniques since they are not verified individually. Specifically, the assignment of MCS intensities greater or equal the VI degree of the MCS scale require opportune in situ verification by professional experts. The purple start shows the epicenter. This map is prepared every so often that the population fill in new questionnaires. The number of questionnaires used to determine the map and the date and time of the last adjournment are shown in the upper right part of the panel.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Rev 100 ML 0.5 2018-12-04
13:46:30
44.29 8.04 8 2018-12-04
14:15:58
Sala Sismica INGV-Roma 63634741
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2018-12-04 13:46:30 ± 0.15
Latitude 44.29 ± 0.01
Longitude 8.04 ± 0.01
Depth (km) 8 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 63634741

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1098
Semi-minor axis of confidence ellipse (meter) 780
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 162
Circular confidence region, given by single value of horizontal uncertainty (meter) 1100
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 174
Number of associated phases, regardless of their use for origin computation 24
Number of defining phases 12
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.27
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.50902
Number of stations at which the event was observed 17
Number of stations from which data was used for origin computation 7
Magnitude information

ML:0.5

Field Value
Value 0.5
Uncertainty 0.2
Num. used stations 6
Type of magnitude ML
Reference to an origin 63634741
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2018-12-04 14:15:58
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.SALB.HHZ. 2018-12-04T13:48:24.14 3.0 negative manual Pn 20.18 0
MN.TRI.HHZ. 2018-12-04T13:48:21.85 3.0 undecidable manual Sn -9.18 0
IV.RM33.HNZ. 2018-12-04T13:48:17.97 3.0 undecidable manual Sn 6.43 0
IV.BORM.HNZ. 2018-12-04T13:47:58.54 3.0 undecidable manual Sg 1.43 0
IV.VVLD.HHZ. 2018-12-04T13:47:50.29 3.0 undecidable manual Pg 23.610001 0
IV.VIVA.HHZ. 2018-12-04T13:47:49.88 3.0 undecidable manual Pg 30.860001 0
MN.TRI.HHZ. 2018-12-04T13:47:49.95 3.0 undecidable manual Pg 18.68 0
IV.RM33.HNZ. 2018-12-04T13:47:42.21 3.0 undecidable manual Pg 21.889999 0
IV.CAVE.HHZ. 2018-12-04T13:47:40.38 3.0 undecidable manual Sg 1.23 0
GU.MAIM.HHZ. 2018-12-04T13:47:18.27 3.0 undecidable manual Sn -4.02 0
IV.NDIM.HHZ. 2018-12-04T13:47:05.52 3.0 positive manual Pg 4.15 0
GU.TRAV.HHZ. 2018-12-04T13:46:49.45 3.0 undecidable manual Pn -0.13 0
FR.SAOF.HHE.00 2018-12-04T13:46:47.05 0.6 undecidable manual S 229 0.4578 50 0.15 47
GU.ENR.HHZ. 2018-12-04T13:46:46.44 0.3 undecidable manual S 263 0.4443 50 -0.06 72
GU.STV.HHZ. 2018-12-04T13:46:40.15 0.1 undecidable manual P 266 0.509 50 -0.54 84
FR.SAOF.HHE.00 2018-12-04T13:46:40.07 0.1 undecidable manual P 229 0.4578 50 0.26 91
GU.ENR.HHZ. 2018-12-04T13:46:39.68 0.1 undecidable manual P 263 0.4443 50 0.1 95
GU.RORO.HHZ. 2018-12-04T13:46:36.88 0.6 undecidable manual S 173 0.1754 111 -0.5 46
GU.GBOS.HHZ. 2018-12-04T13:46:36.44 0.6 undecidable manual S 252 0.1466 115 0.08 50
GU.CANO.HHZ. 2018-12-04T13:46:36.74 0.6 undecidable manual S 118 0.1646 113 -0.26 48
IV.QLNO.HHZ. 2018-12-04T13:46:35.42 0.3 negative manual P 80 0.2257 107 0.06 75
GU.CANO.HHZ. 2018-12-04T13:46:34.19 0.1 negative manual P 118 0.1646 113 0.1 100
GU.RORO.HHZ. 2018-12-04T13:46:34.70 0.3 negative manual P 173 0.1754 111 0.39 70
GU.GBOS.HHZ. 2018-12-04T13:46:33.71 1.0 negative manual P 252 0.1466 115 -0.01 26
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.RM33.HNE. ML:4.6 0.0014135 0.82 AML other m 2018-12-04T13:48:19.95
GU.GBOS.HHE. ML:0.2 1.29841285E-5 0.1152 AML other m 2018-12-04T13:46:36.92
GU.GBOS.HHN. ML:0.6 3.807111E-5 1.9584 AML other m 2018-12-04T13:46:35.98
GU.CANO.HHN. ML:0.7 4.3192996E-5 0.1216 AML other m 2018-12-04T13:46:37.24
GU.CANO.HHE. ML:0.9 6.2644895E-5 0.7232 AML other m 2018-12-04T13:46:38.93
GU.RORO.HHN. ML:0.4 2.16753835E-5 0.0768 AML other m 2018-12-04T13:46:38.27
GU.RORO.HHE. ML:0.4 2.071301E-5 0.1024 AML other m 2018-12-04T13:46:37.54
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download