Earthquake (quarry blast) with magnitude of ML 0.4 on date 15-09-2020 and time 08:41:05 (UTC) in region 2 km W Bagnasco (CN)

A magnitude ML 0.4 (quarry blast) earthquake occured in region: 2 km W Bagnasco (CN), on

  • 15-09-2020 08:41:05 (UTC)
  • 15-09-2020 10:41:05 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.3, 8.02 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.

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
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
Castelnuovo di Ceva CN 11 110 13289
Garessio CN 11 3244 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 12 486 21214
Sale San Giovanni CN 13 183 21397
Roascio CN 13 97 21494
Montezemolo CN 14 259 21753
Castellino Tanaro CN 15 312 22065
Vicoforte CN 15 3136 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
Roccavignale SV 16 752 28780
Monastero di Vasco CN 16 1297 30077
Igliano CN 16 74 30151
Frabosa Soprana CN 17 759 30910
Cigliè CN 17 190 31100
Millesimo SV 17 3383 34483
Rocca Cigliè CN 17 142 34625
Camerana CN 17 631 35256
Frabosa Sottana CN 17 1497 36753
Marsaglia CN 17 245 36998
Bormida SV 18 387 37385
Saliceto CN 18 1323 38708
Mondovì CN 18 22484 61192
Cengio SV 18 3563 64755
Ormea CN 19 1617 66372
Bastia Mondovì CN 19 669 67041
Cosseria SV 19 1105 68146
Erli SV 19 245 68391
Plodio SV 19 650 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)
82 Km SE of Moncalieri (57294 inhabitants)
83 Km SW of Alessandria (93943 inhabitants)
90 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
Bulletin
Rev1000
ML 0.4 2020-09-15
08:41:05
44.3 8.02 1 2021-02-26
14:55:58
Bollettino Sismico Italiano INGV 83642431
Reviewed
Rev100
ML 0.3 2020-09-15
08:41:05
44.28 8.03 9 2020-09-15
09:12:45
Sala Sismica INGV-Roma 82925041
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-09-15 08:41:05 ± 0.23
Latitude 44.30 ± 0.02
Longitude 8.02 ± 0.01
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 83642431

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 2000
Semi-minor axis of confidence ellipse (meter) 900
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 359
Circular confidence region, given by single value of horizontal uncertainty (meter) 2000
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 180
Number of associated phases, regardless of their use for origin computation 7
Number of defining phases 7
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.34
Epicentral distance of station closest to the epicenter (degree) 0.1376
Epicentral distance of station farthest from the epicenter (degree) 0.49553
Number of stations at which the event was observed 7
Number of stations from which data was used for origin computation 7
Magnitudes information

ML:0.4

Field Value
Value 0.4
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 83642431
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-11-30 09:17:59

ML:0.3

Field Value
Value 0.3
Uncertainty 0.1
Num. used stations 2
Type of magnitude ML
Reference to an origin 82925041
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-09-15 09:12:45
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
GU.STV.HHZ. 2020-09-15T08:41:16.40 0.3 undecidable manual P 264 0.4955 91 -0.21 68
GU.ENR.HHZ. 2020-09-15T08:41:14.77 0.3 undecidable manual P 261 0.4317 91 -0.41 66
GU.MGRO.HHZ. 2020-09-15T08:41:12.07 0.1 undecidable manual P 210 0.2959 91 -0.08 96
IV.QLNO.HHZ. 2020-09-15T08:41:10.94 0.3 undecidable manual P 84 0.2383 91 0.07 73
GU.RORO.HHZ. 2020-09-15T08:41:09.68 0.3 undecidable manual P 169 0.1898 91 -0.12 73
GU.CANO.HHZ. 2020-09-15T08:41:09.65 0.1 undecidable manual P 120 0.1835 91 0 100
GU.GBOS.HHZ. 2020-09-15T08:41:09.24 0.1 undecidable manual P 246 0.1376 92 0.6 87
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
GU.GBOS.HHE. ML:0 1.695E-5 0.64 AML other m 2020-09-15T08:41:14.90
GU.CANO.HHE. ML:0.8 4.7895235E-5 0.8768 AML other m 2020-09-15T08:41:12.70
GU.RORO.HHN. ML:0.4 1.8643335E-5 0.48 AML other m 2020-09-15T08:41:12.85
GU.CANO.HHN. ML:0.6 3.060619E-5 1.216 AML other m 2020-09-15T08:41:12.76
IV.QLNO.HHE. ML:0.5 2.233815E-5 1.7856 AML other m 2020-09-15T08:41:15.21
IV.QLNO.HHN. ML:0.4 1.5670815E-5 0.8384 AML other m 2020-09-15T08:41:15.03
GU.MGRO.HHN. ML:0.5 1.3425455E-5 1.1648 AML other m 2020-09-15T08:41:17.19
GU.MGRO.HHE. ML:0.5 1.5186405E-5 1.44 AML other m 2020-09-15T08:41:17.53
GU.STV.HHN. ML:0.3 6.4897655E-6 3.3408 AML other m 2020-09-15T08:41:22.28
GU.STV.HHE. ML:0.3 5.602066E-6 3.1616 AML other m 2020-09-15T08:41:22.64
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