Earthquake (quarry blast) with magnitude of ML 0.2 on date 23-12-2020 and time 10:02:34 (Italy) in region 2 km SW Bagnasco (CN)

A magnitude ML 0.2 (quarry blast) earthquake occured in region: 2 km SW Bagnasco (CN), on

  • 23-12-2020 09:02:34 (UTC)
  • 23-12-2020 10:02:34 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.29, 8.03 at 6 km depth.

The earthquake was located by: Sala Sismica INGV-Roma.

Event type: quarry blast.

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 4 113 1148
Battifollo CN 4 219 1367
Priola CN 5 701 2068
Lisio CN 5 201 2269
Viola CN 5 391 2660
Scagnello CN 6 194 2854
Nucetto CN 6 430 3284
Perlo CN 7 116 3400
Calizzano SV 9 1475 4875
Monasterolo Casotto CN 9 89 4964
Pamparato CN 9 302 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
Torre Mondovì CN 13 498 17374
Sale delle Langhe CN 13 486 17860
Bardineto SV 13 756 18616
Sale San Giovanni CN 13 183 18799
Osiglia SV 14 444 19243
Montezemolo CN 14 259 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
Castellino Tanaro CN 16 312 24404
Torresina CN 16 52 24456
Millesimo SV 16 3383 27839
Paroldo CN 17 211 28050
Vicoforte CN 17 3136 31186
Niella Tanaro CN 17 1046 32232
Briaglia CN 17 318 32550
Camerana CN 18 631 33181
Erli SV 18 245 33426
Igliano CN 18 74 33500
Monastero di Vasco CN 18 1297 34797
Saliceto CN 18 1323 36120
Frabosa Soprana CN 18 759 36879
Cengio SV 18 3563 40442
Ormea CN 18 1617 42059
Castelvecchio di Rocca Barbena SV 19 145 42204
Cigliè CN 19 190 42394
Plodio SV 19 650 43044
Cosseria SV 19 1105 44149
Frabosa Sottana CN 19 1497 45646
Rocca Cigliè CN 19 142 45788
Marsaglia CN 19 245 46033
Nasino SV 19 207 46240
Castelbianco SV 20 330 46570
Caprauna CN 20 104 46674
Pallare SV 20 923 47597
Alto CN 20 128 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
Reviewed
Rev100
ML 0.2 2020-12-23
09:02:34
44.29 8.03 6 2020-12-23
09:10:06
Sala Sismica INGV-Roma 85645601
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-12-23 09:02:34 ± 0.17
Latitude 44.29 ± 0.02
Longitude 8.03 ± 0.01
Depth (km) 6 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type quarry blast
Origin ID 85645601

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1918
Semi-minor axis of confidence ellipse (meter) 444
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 164
Circular confidence region, given by single value of horizontal uncertainty (meter) 1920
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 153
Number of associated phases, regardless of their use for origin computation 12
Number of defining phases 12
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.39
Epicentral distance of station closest to the epicenter (degree) 0.14569
Epicentral distance of station farthest from the epicenter (degree) 0.45686
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:0.2

Field Value
Value 0.2
Uncertainty 0.3
Num. used stations 6
Type of magnitude ML
Reference to an origin 85645601
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-12-23 09:10:06
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
GU.PCP.HHZ. 2020-12-23T09:02:51.17 0.3 undecidable manual S 55 0.4452 50 -0.02 71
FR.SAOF.HHE.00 2020-12-23T09:02:51.22 0.6 undecidable manual S 229 0.4569 50 -0.31 44
GU.ENR.HHZ. 2020-12-23T09:02:50.34 0.6 undecidable manual S 262 0.4425 50 -0.76 39
FR.SAOF.HHE.00 2020-12-23T09:02:45.14 0.1 undecidable manual P 229 0.4569 50 0.84 74
GU.PCP.HHZ. 2020-12-23T09:02:44.54 0.1 undecidable manual P 55 0.4452 50 0.44 87
GU.ENR.HHZ. 2020-12-23T09:02:43.63 0.1 undecidable manual P 262 0.4425 50 -0.42 87
IV.QLNO.HHZ. 2020-12-23T09:02:42.93 0.6 undecidable manual S 80 0.2266 103 -0.48 45
GU.GBOS.HHZ. 2020-12-23T09:02:40.44 0.6 undecidable manual S 252 0.1457 111 0.05 50
GU.CANO.HHZ. 2020-12-23T09:02:40.96 0.6 undecidable manual S 118 0.1664 108 -0.2 48
IV.QLNO.HHZ. 2020-12-23T09:02:39.56 0.1 undecidable manual P 80 0.2266 103 -0.05 98
GU.CANO.HHZ. 2020-12-23T09:02:38.33 0.1 undecidable manual P 118 0.1664 108 0.02 100
GU.GBOS.HHZ. 2020-12-23T09:02:37.99 0.1 undecidable manual P 252 0.1457 111 0.12 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
GU.GBOS.HHE. ML:0 1.0296817E-5 0.2176 AML other m 2020-12-23T09:02:40.67
GU.GBOS.HHN. ML:0.2 1.3550684E-5 0.1984 AML other m 2020-12-23T09:02:40.60
GU.CANO.HHE. ML:0.9 7.190116E-5 1.12 AML other m 2020-12-23T09:02:41.26
GU.CANO.HHN. ML:0.5 2.5907385E-5 1.0432 AML other m 2020-12-23T09:02:41.50
IV.QLNO.HHE. ML:0.2 9.2613815E-6 0.8448 AML other m 2020-12-23T09:02:42.79
IV.QLNO.HHN. ML:-0.1 2.78679E-6 0.2176 AML other m 2020-12-23T09:02:43.05
GU.ENR.HHE. ML:0.3 6.087479E-6 0.5632 AML other m 2020-12-23T09:02:50.78
GU.ENR.HHN. ML:1 2.391218E-5 1.856 AML other m 2020-12-23T09:02:51.38
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