Istituto Nazionale di Geofisica e Vulcanologia

Earthquake (quarry blast) with magnitude of ML 0.9 on date 19-07-2021 and time 11:54:09 (Italy) in region 1 km W San Michele Mondovì (CN)

A magnitude ML 0.9 (quarry blast) earthquake occured in region: 1 km W San Michele Mondovì (CN), on

  • 19-07-2021 09:54:09 (UTC)
  • 19-07-2021 11:54:09 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.3820, 7.8930 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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Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
San Michele Mondovì CN 1 2003 2003
Briaglia CN 2 318 2321
Vicoforte CN 2 3136 5457
Torre Mondovì CN 3 498 5955
Niella Tanaro CN 4 1046 7001
Mondovì CN 6 22484 29485
Lesegno CN 6 794 30279
Cigliè CN 7 190 30469
Mombasiglio CN 7 609 31078
Bastia Mondovì CN 7 669 31747
Monasterolo Casotto CN 7 89 31836
Monastero di Vasco CN 7 1297 33133
Montaldo di Mondovì CN 7 557 33690
Rocca Cigliè CN 8 142 33832
Roburent CN 9 495 34327
Castellino Tanaro CN 9 312 34639
Scagnello CN 9 194 34833
Marsaglia CN 11 245 35078
Lisio CN 11 201 35279
Carrù CN 11 4486 39765
Roascio CN 11 97 39862
Villanova Mondovì CN 11 5792 45654
Clavesana CN 11 825 46479
Magliano Alpi CN 11 2253 48732
Ceva CN 11 5782 54514
Battifollo CN 12 219 54733
Frabosa Sottana CN 12 1497 56230
Viola CN 12 391 56621
Pamparato CN 12 302 56923
Igliano CN 12 74 56997
Frabosa Soprana CN 13 759 57756
Torresina CN 13 52 57808
Rocca de' Baldi CN 13 1662 59470
Roccaforte Mondovì CN 14 2085 61555
Nucetto CN 14 430 61985
Belvedere Langhe CN 14 366 62351
Murazzano CN 14 834 63185
Farigliano CN 15 1755 64940
Pianfei CN 15 2202 67142
Bagnasco CN 15 1035 68177
Piozzo CN 15 995 69172
Sale San Giovanni CN 15 183 69355
Morozzo CN 15 2086 71441
Sale delle Langhe CN 15 486 71927
Paroldo CN 15 211 72138
Priero CN 16 529 72667
Perlo CN 16 116 72783
Margarita CN 17 1441 74224
Bonvicino CN 17 92 74316
Massimino SV 17 113 74429
Dogliani CN 17 4781 79210
Trinità CN 18 2263 81473
San Benedetto Belbo CN 18 179 81652
Mombarcaro CN 18 268 81920
Chiusa di Pesio CN 18 3676 85596
Priola CN 18 701 86297
Bene Vagienna CN 19 3671 89968
Castelnuovo di Ceva CN 19 110 90078
Somano CN 20 356 90434
Beinette CN 20 3423 93857
Sant'Albano Stura CN 20 2422 96279
Montezemolo CN 20 259 96538
Lequio Tanaro CN 20 782 97320

Municipalities with at least 50000 inhabitants

An earthquake occurred to
27 Km E of Cuneo (56081 inhabitants)
48 Km W of Savona (61345 inhabitants)
63 Km SW of Asti (76202 inhabitants)
63 Km N of Sanremo (54807 inhabitants)
71 Km S of Moncalieri (57294 inhabitants)
79 Km S of Torino (890529 inhabitants)
82 Km SW of Alessandria (93943 inhabitants)
83 Km W of Genova (586655 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 0.9 2021-07-19
09:54:09		 44.3825 7.8933 1 2021-12-29
11:12:49		 Bollettino Sismico Italiano INGV 97204741
Reviewed
Rev100 		ML 0.9 2021-07-19
09:54:10		 44.3312 7.8933 10 2021-07-19
09:59:49		 Sala Sismica INGV-Roma 92947911
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-07-19 09:54:09 ± 0.11
Latitude 44.3825 ± 0.0072
Longitude 7.8933 ± 0.0076
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 97204741

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 830
Semi-minor axis of confidence ellipse (meter) 600
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 2
Circular confidence region, given by single value of horizontal uncertainty (meter) 830.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 116
Number of associated phases, regardless of their use for origin computation 10
Number of defining phases 10
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.23
Epicentral distance of station closest to the epicenter (degree) 0.14569
Epicentral distance of station farthest from the epicenter (degree) 0.63762
Number of stations at which the event was observed 10
Number of stations from which data was used for origin computation 10
Magnitudes information

ML:0.9

Field Value
Value 0.9
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 97204741
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-11-03 15:42:09

ML:0.9

Field Value
Value 0.9
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 92947911
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-07-19 09:59:49
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
GU.BHB.HHE. 2021-07-19T09:54:23.36 0.3 undecidable manual P 315 70.7736 50 -0.14 67
GU.PZZ.HHZ. 2021-07-19T09:54:21.97 0.3 undecidable manual P 283 63.0924 50 -0.35 65
GU.PCP.HHE. 2021-07-19T09:54:20.80 0.3 undecidable manual P 71 54.6009 91 0.05 70
GU.STV.HHZ. 2021-07-19T09:54:19.88 0.3 undecidable manual P 251 47.5191 91 0.54 64
GU.ENR.HHZ. 2021-07-19T09:54:18.18 0.3 undecidable manual P 246 41.3253 91 0.07 72
GU.MGRO.HHZ. 2021-07-19T09:54:17.21 0.3 undecidable manual P 190 38.3283 91 -0.28 69
IV.QLNO.HHZ. 2021-07-19T09:54:17.28 0.3 undecidable manual P 100 36.4413 91 0.15 71
GU.CANO.HHZ. 2021-07-19T09:54:16.61 0.3 undecidable manual P 125 33.5442 91 0.08 72
GU.RORO.HHE. 2021-07-19T09:54:16.25 0.3 undecidable manual P 155 32.9448 91 -0.18 71
GU.GBOS.HHZ. 2021-07-19T09:54:13.12 0.1 undecidable manual P 195 16.1727 92 0.05 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
GU.GBOS.HHE. ML:0.7 0.00006095 1.32 AML other m 2021-07-19T09:54:16.32
GU.GBOS.HHN. ML:0.7 0.0000532 0.46 AML other m 2021-07-19T09:54:17.87
GU.CANO.HHN. ML:1.0 0.00004124999999999999 0.54 AML other m 2021-07-19T09:54:22.71
IV.QLNO.HHE. ML:0.7 0.000021699999999999996 0.24 AML other m 2021-07-19T09:54:22.93
IV.QLNO.HHN. ML:0.9 0.0000288 1.46 AML other m 2021-07-19T09:54:23.16
GU.ENR.HHN. ML:0.8 0.000020900000000000003 1.28 AML other m 2021-07-19T09:54:25.25
GU.CANO.HHE. ML:1.1 0.000056999999999999996 1.22 AML other m 2021-07-19T09:54:25.26
GU.ENR.HHE. ML:0.8 0.00001925 0.7 AML other m 2021-07-19T09:54:26.22
GU.PZZ.HHN. ML:1.1 0.0000233 0.82 AML other m 2021-07-19T09:54:32.59
GU.PZZ.HHE. ML:1.2 0.000028049999999999997 0.2 AML other m 2021-07-19T09:54:33.14
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