Istituto Nazionale di Geofisica e Vulcanologia

Earthquake (quarry blast) with magnitude of ML 1.1 on date 12-05-2023 and time 11:34:19 (Italy) in region 2 km W Monasterolo Casotto (CN)

A magnitude ML 1.1 (quarry blast) earthquake occured in region: 2 km W Monasterolo Casotto (CN), on

  • 12-05-2023 09:34:19 (UTC)
  • 12-05-2023 11:34:19 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.3260, 7.9200 at 9 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.

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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
Monasterolo Casotto CN 2 89 89
Roburent CN 3 495 584
Torre Mondovì CN 3 498 1082
Montaldo di Mondovì CN 4 557 1639
Lisio CN 5 201 1840
Pamparato CN 5 302 2142
Viola CN 5 391 2533
Scagnello CN 5 194 2727
San Michele Mondovì CN 6 2003 4730
Mombasiglio CN 6 609 5339
Vicoforte CN 7 3136 8475
Battifollo CN 7 219 8694
Monastero di Vasco CN 8 1297 9991
Briaglia CN 9 318 10309
Lesegno CN 9 794 11103
Frabosa Soprana CN 10 759 11862
Frabosa Sottana CN 10 1497 13359
Niella Tanaro CN 10 1046 14405
Bagnasco CN 10 1035 15440
Mondovì CN 11 22484 37924
Nucetto CN 11 430 38354
Ceva CN 12 5782 44136
Priola CN 12 701 44837
Cigliè CN 12 190 45027
Massimino SV 12 113 45140
Castellino Tanaro CN 13 312 45452
Villanova Mondovì CN 13 5792 51244
Perlo CN 13 116 51360
Roascio CN 13 97 51457
Bastia Mondovì CN 13 669 52126
Rocca Cigliè CN 14 142 52268
Roccaforte Mondovì CN 14 2085 54353
Priero CN 15 529 54882
Marsaglia CN 15 245 55127
Torresina CN 15 52 55179
Igliano CN 15 74 55253
Sale San Giovanni CN 15 183 55436
Sale delle Langhe CN 15 486 55922
Garessio CN 17 3244 59166
Paroldo CN 17 211 59377
Castelnuovo di Ceva CN 17 110 59487
Pianfei CN 17 2202 61689
Carrù CN 17 4486 66175
Clavesana CN 18 825 67000
Magliano Alpi CN 18 2253 69253
Rocca de' Baldi CN 18 1662 70915
Murazzano CN 18 834 71749
Calizzano SV 19 1475 73224
Montezemolo CN 19 259 73483
Chiusa di Pesio CN 19 3676 77159
Murialdo SV 19 841 78000
Belvedere Langhe CN 19 366 78366
Ormea CN 20 1617 79983
Morozzo CN 20 2086 82069

Municipalities with at least 50000 inhabitants

An earthquake occurred to
30 Km E of Cuneo (56081 inhabitants)
45 Km W of Savona (61345 inhabitants)
57 Km N of Sanremo (54807 inhabitants)
68 Km SW of Asti (76202 inhabitants)
78 Km S of Moncalieri (57294 inhabitants)
81 Km W of Genova (586655 inhabitants)
85 Km S of Torino (890529 inhabitants)
86 Km SW of Alessandria (93943 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
Reviewed
Rev100 		ML 1.1 2023-05-12
09:34:19		 44.3255 7.9203 9 2023-05-12
09:41:58		 Sala Sismica INGV-Roma 117281021
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-05-12 09:34:19 ± 0.08
Latitude 44.3255 ± 0.0036
Longitude 7.9203 ± 0.0075
Depth (km) 9 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type quarry blast
Origin ID 117281021

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 618
Semi-minor axis of confidence ellipse (meter) 106
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 74
Circular confidence region, given by single value of horizontal uncertainty (meter) 620.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 98
Number of associated phases, regardless of their use for origin computation 14
Number of defining phases 14
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.2
Epicentral distance of station closest to the epicenter (degree) 0.10162
Epicentral distance of station farthest from the epicenter (degree) 0.69158
Number of stations at which the event was observed 7
Number of stations from which data was used for origin computation 7
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.3
Num. used stations 11
Type of magnitude ML
Reference to an origin 117281021
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-05-12 09:41:58
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
GU.BHB.HHZ. 2023-05-12T09:34:42.19 1.0 undecidable manual S 318 76.7676 50 -0.54 20
GU.PZZ.HHZ. 2023-05-12T09:34:40.17 0.6 undecidable manual S 288 66.8775 50 0.1 45
GU.BHB.HHZ. 2023-05-12T09:34:32.17 1.0 undecidable manual P 318 76.7676 50 -0.69 19
IV.QLNO.HHZ. 2023-05-12T09:34:31.00 0.6 undecidable manual S 90 33.744 50 -0.25 47
GU.PZZ.HHZ. 2023-05-12T09:34:31.35 0.6 positive manual P 288 66.8775 50 0.02 46
GU.MGRO.HHZ. 2023-05-12T09:34:30.86 0.6 undecidable manual S 196 32.6451 50 -0.08 48
GU.RORO.HHE. 2023-05-12T09:34:28.84 0.3 undecidable manual S 154 26.3514 109 -0.24 71
4P.IT06A.HHZ. 2023-05-12T09:34:28.31 0.6 undecidable manual S 352 23.5542 112 0.13 49
IV.QLNO.HHZ. 2023-05-12T09:34:26.55 1.0 positive manual P 90 33.744 50 0.31 23
GU.MGRO.HHZ. 2023-05-12T09:34:26.34 0.1 undecidable manual P 196 32.6451 50 0.28 93
GU.RORO.HHE. 2023-05-12T09:34:25.29 0.3 undecidable manual P 154 26.3514 109 0.31 70
GU.GBOS.HHE. 2023-05-12T09:34:24.24 0.6 undecidable manual S 214 11.2776 130 -0.23 49
4P.IT06A.HHZ. 2023-05-12T09:34:24.47 0.1 negative manual P 352 23.5542 112 0.01 100
GU.GBOS.HHE. 2023-05-12T09:34:22.31 0.3 undecidable manual P 214 11.2776 130 -0.01 77
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
4P.IT06A.HHE. ML:1.5 0.00021216905 0.224 AML other m 2023-05-12T09:34:29.11
4P.IT06A.HHN. ML:1.7 0.0002930628 0.2176 AML other m 2023-05-12T09:34:28.95
GU.MGRO.HHE. ML:1.0 0.000040835005 0.1792 AML other m 2023-05-12T09:34:31.93
GU.MGRO.HNE. ML:1.3 0.0000821432 0.8896 AML other m 2023-05-12T09:34:28.13
GU.MGRO.HNN. ML:1.0 0.000040301955 0.1664 AML other m 2023-05-12T09:34:31.86
IV.QLNO.HHE. ML:0.8 0.000030118020000000003 0.8384 AML other m 2023-05-12T09:34:26.45
IV.QLNO.HHN. ML:0.8 0.000026479135 0.4608 AML other m 2023-05-12T09:34:35.74
GU.PZZ.HHE. ML:1.2 0.00002722425 0.2816 AML other m 2023-05-12T09:34:43.73
GU.PZZ.HHN. ML:1.0 0.000022144604000000002 0.1792 AML other m 2023-05-12T09:34:42.70
GU.BHB.HNE. ML:1.3 0.000031580634999999996 0.7168 AML other m 2023-05-12T09:34:47.12
GU.BHB.HHE. ML:1.1 0.00002060425 0.2176 AML other m 2023-05-12T09:34:43.43
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