Earthquake 2 km W Bagnasco (CN), Magnitude ML 0.5, 13 December 2021 time 13:09:38 (Timezone UTC)

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

13-12-2021 13:09:38 (UTC)
13-12-2021 14:09:38 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.2980, 8.0140 at 0 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

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.

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Display location by

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).

Municipality	Region	Distance (km)	Inhabitants	Cumulative Inhabitants
Bagnasco	CN	2	1035	1035
Battifollo	CN	3	219	1254
Lisio	CN	3	201	1455
Viola	CN	4	391	1846
Scagnello	CN	5	194	2040
Massimino	SV	5	113	2153
Priola	CN	6	701	2854
Nucetto	CN	6	430	3284
Perlo	CN	7	116	3400
Monasterolo Casotto	CN	7	89	3489
Mombasiglio	CN	8	609	4098
Pamparato	CN	8	302	4400
Roburent	CN	10	495	4895
Ceva	CN	10	5782	10677
Calizzano	SV	11	1475	12152
Priero	CN	11	529	12681
Torre Mondovì	CN	11	498	13179
Garessio	CN	11	3244	16423
Castelnuovo di Ceva	CN	11	110	16533
Murialdo	SV	12	841	17374
Montaldo di Mondovì	CN	12	557	17931
Lesegno	CN	12	794	18725
San Michele Mondovì	CN	12	2003	20728
Sale delle Langhe	CN	13	486	21214
Sale San Giovanni	CN	13	183	21397
Roascio	CN	13	97	21494
Montezemolo	CN	14	259	21753
Vicoforte	CN	15	3136	24889
Castellino Tanaro	CN	15	312	25201
Bardineto	SV	15	756	25957
Osiglia	SV	15	444	26401
Niella Tanaro	CN	15	1046	27447
Torresina	CN	15	52	27499
Briaglia	CN	15	318	27817
Paroldo	CN	16	211	28028
Monastero di Vasco	CN	16	1297	29325
Roccavignale	SV	16	752	30077
Igliano	CN	16	74	30151
Frabosa Soprana	CN	16	759	30910
Cigliè	CN	17	190	31100
Frabosa Sottana	CN	17	1497	32597
Millesimo	SV	17	3383	35980
Rocca Cigliè	CN	17	142	36122
Camerana	CN	17	631	36753
Marsaglia	CN	18	245	36998
Bormida	SV	18	387	37385
Saliceto	CN	18	1323	38708
Mondovì	CN	18	22484	61192
Ormea	CN	18	1617	62809
Cengio	SV	19	3563	66372
Bastia Mondovì	CN	19	669	67041
Erli	SV	19	245	67286
Cosseria	SV	19	1105	68391
Plodio	SV	20	650	69041
Murazzano	CN	20	834	69875
Mombarcaro	CN	20	268	70143

Municipalities with at least 50000 inhabitants

An earthquake occurred to

37 Km W of Savona (61345 inhabitants)

38 Km E of Cuneo (56081 inhabitants)

56 Km NE of Sanremo (54807 inhabitants)

69 Km S of Asti (76202 inhabitants)

74 Km W of Genova (586655 inhabitants)

83 Km SE of Moncalieri (57294 inhabitants)

84 Km SW of Alessandria (93943 inhabitants)

90 Km SE of Torino (890529 inhabitants)

Recent and historical seismicity

Not available maps for this sismic event.

Seismic hazard

Not available maps for this sismic event.

Shakemap

Not available maps for this sismic event.

Felt maps

Not available maps for this sismic event.

Locations history

Type	Magnitude	Date and Time (UTC)	Latitude	Longitude	Depth (km)	Published time (UTC)	Author	Location ID
Bulletin Rev1000	ML 0.5	2021-12-13 13:09:38	44.2975	8.0142	1	2022-03-30 13:04:33	Bollettino Sismico Italiano INGV	100405481
Reviewed Rev100	ML 0.5	2021-12-13 13:09:38	44.2822	8.0337	7	2021-12-13 13:20:42	Sala Sismica INGV-Roma	98464851

Preferred location and magnitude until now.

Origin information

Origin

Field	Value
Time (UTC)	2021-12-13 13:09:38 ± 0.25
Latitude	44.2975 ± 0.0216
Longitude	8.0142 ± 0.0176
Depth (km)	1 (operator assigned)
Evaluation mode of Origin	manual
Evaluation status of Origin	reviewed
Version	1000 -> BULLETIN-INGV
Event type	quarry blast
Origin ID	100405481

Uncertainty

Field	Value
Preferred uncertainty description	uncertainty ellipse
Semi-major axis of confidence ellipse (meter)	2420
Semi-minor axis of confidence ellipse (meter)	1250
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi)	346
Circular confidence region, given by single value of horizontal uncertainty (meter)	2420.0
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	20
Number of defining phases	6
RMS of the travel time residuals of the arrivals used for the origin computation (sec)	0.45
Epicentral distance of station closest to the epicenter (degree)	0.00000
Epicentral distance of station farthest from the epicenter (degree)	0.49463
Number of stations at which the event was observed	19
Number of stations from which data was used for origin computation	6

Magnitudes information

ML:0.5

Field	Value
Value	0.5
Uncertainty	0.4
Num. used stations	4
Type of magnitude	ML
Reference to an origin	100405481
Agency	INGV
Autore	Bollettino Sismico Italiano INGV
Time of creation (UTC)	2022-01-31 14:28:47

ML:0.5

Field	Value
Value	0.5
Uncertainty	0.3
Num. used stations	4
Type of magnitude	ML
Reference to an origin	98464851
Agency	INGV
Autore	Sala Sismica INGV-Roma
Time of creation (UTC)	2021-12-13 13:20:42

Picking and Arrival

SCNL	Time	Uncertainty	Polarity	Evaluation_mode	Phase	Azimuth	Distance(km)	Takeoff_angle	Residual	Weight
IV.FREG.EHZ.	2021-12-13T13:11:36.98	3.0	undecidable	manual	Sg				16.32	0
OX.CIMO.HHZ.	2021-12-13T13:11:27.21	3.0	undecidable	manual	Sn				1	0
IV.CRTC.HHZ.	2021-12-13T13:11:25.98	3.0	undecidable	manual	Sn				4	0
IV.SENA.HHZ.	2021-12-13T13:11:22.73	3.0	undecidable	manual	Sn				-8.56	0
IV.BRSN.EHZ.	2021-12-13T13:11:11.31	3.0	undecidable	manual	Sg				4.68	0
IV.FIR.HHZ.	2021-12-13T13:10:49.57	3.0	undecidable	manual	Sn				-4.09	0
IV.CRTC.HHZ.	2021-12-13T13:10:44.05	3.0	undecidable	manual	Pg				6.65	0
IV.ARVD.HHZ.	2021-12-13T13:10:43.91	3.0	positive	manual	Pn				5.18	0
IV.BRES.EHZ.	2021-12-13T13:10:39.11	3.0	undecidable	manual	Pn				1.69	0
GU.FIVI.HNZ.	2021-12-13T13:10:29.57	3.0	undecidable	manual	S				-2.8	0
GU.CIRO.HHZ.	2021-12-13T13:10:22.32	3.0	undecidable	manual	S				-4.53	0
IV.VOBA.EHZ.	2021-12-13T13:10:17.98	3.0	undecidable	manual	Pn				-1.22	0
GU.GSCL.HHZ.	2021-12-13T13:10:12.15	3.0	undecidable	manual	Pn				-1.92	0
IV.SARZ.HHZ.	2021-12-13T13:10:08.55	3.0	undecidable	manual	S				-5.95	0
GU.PCP.HHE.	2021-12-13T13:09:48.71	0.3	undecidable	manual	P	57	50.0166	91	0.13	71
GU.STV.HHZ.	2021-12-13T13:09:48.80	0.3	undecidable	manual	P	264	54.9006	91	-0.76	59
IV.QLNO.HHZ.	2021-12-13T13:09:43.93	0.1	undecidable	manual	P	83	26.5512	91	0.06	100
GU.CANO.HHZ.	2021-12-13T13:09:42.39	0.3	undecidable	manual	P	119	20.3685	91	-0.24	73
GU.GBOS.HHZ.	2021-12-13T13:09:42.10	0.1	undecidable	manual	P	246	15.1737	92	0.51	93
GU.RORO.HHZ.	2021-12-13T13:09:42.75	0.3	undecidable	manual	P	168	20.9679	91	0	77

Station Magnitude and Amplitude

SCNL	mag	Generic_amplitude	Period	Type	Category	Unit	Time_window_reference
GU.GBOS.HHN.	ML:0.2	0.00001756238	0.2048	AML	other	m	2021-12-13T13:09:45.17
GU.CANO.HHE.	ML:0.9	0.000068364985	0.6656	AML	other	m	2021-12-13T13:09:45.61
GU.GBOS.HHE.	ML:0.1	0.000012729235	0.6176	AML	other	m	2021-12-13T13:09:45.74
GU.CANO.HHN.	ML:0.7	0.000042041195000000006	0.2816	AML	other	m	2021-12-13T13:09:45.48

TDMT - Time Domain Moment Tensor

Not available TDMT solution for this seismic event.

Fault Plane solutions in the area

Not available maps for this sismic event.

Download

Type	Description	Link
QuakeML - small	Event, Origin, FocalMechanism	Download
QuakeML - full	Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude	Download

Earthquake (quarry blast) with magnitude of ML 0.5 on date 13-12-2021 and time 13:09:38 (UTC) in region 2 km W Bagnasco (CN)

Municipalities within 20 km from the epicenter

Municipalities with at least 50000 inhabitants

Origin

Uncertainty

Quality

ML:0.5

ML:0.5