Istituto Nazionale di Geofisica e Vulcanologia

Earthquake (quarry blast) with magnitude of ML 1.3 on date 09-07-2021 and time 10:03:19 (Italy) in region 2 km S Robilante (CN)

A magnitude ML 1.3 (quarry blast) earthquake occured in region: 2 km S Robilante (CN), on

  • 09-07-2021 08:03:19 (UTC)
  • 09-07-2021 10:03:19 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.2810, 7.5110 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
Robilante CN 2 2306 2306
Vernante CN 4 1178 3484
Roaschia CN 4 107 3591
Roccavione CN 4 2761 6352
Borgo San Dalmazzo CN 6 12468 18820
Boves CN 7 9835 28655
Roccasparvera CN 9 741 29396
Valdieri CN 9 935 30331
Vignolo CN 9 2600 32931
Entracque CN 10 774 33705
Gaiola CN 10 582 34287
Limone Piemonte CN 10 1485 35772
Peveragno CN 10 5543 41315
Moiola CN 11 234 41549
Rittana CN 12 109 41658
Cervasca CN 12 5013 46671
Valloriate CN 13 109 46780
Cuneo CN 13 56081 102861
Bernezzo CN 13 4104 106965
Chiusa di Pesio CN 14 3676 110641
Beinette CN 14 3423 114064
Caraglio CN 17 6836 120900
Demonte CN 17 2003 122903
Valgrana CN 18 786 123689
Pianfei CN 19 2202 125891
Roccaforte Mondovì CN 19 2085 127976
Margarita CN 20 1441 129417

Municipalities with at least 50000 inhabitants

An earthquake occurred to
13 Km S of Cuneo (56081 inhabitants)
56 Km NW of Sanremo (54807 inhabitants)
77 Km W of Savona (61345 inhabitants)
81 Km S of Moncalieri (57294 inhabitants)
88 Km SW of Asti (76202 inhabitants)
89 Km S 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 1.3 2021-07-09
08:03:19		 44.2812 7.5107 1 2021-12-29
11:12:11		 Bollettino Sismico Italiano INGV 92749211
Reviewed
Rev100 		ML 1.3 2021-07-09
08:03:19		 44.2788 7.4737 9 2021-07-09
08:14:45		 Sala Sismica INGV-Roma 92479861
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-07-09 08:03:19 ± 0.18
Latitude 44.2812 ± 0.0135
Longitude 7.5107 ± 0.0138
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 92749211

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1530
Semi-minor axis of confidence ellipse (meter) 1020
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 13
Circular confidence region, given by single value of horizontal uncertainty (meter) 1530.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 88
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) 0.42
Epicentral distance of station closest to the epicenter (degree) 0.08364
Epicentral distance of station farthest from the epicenter (degree) 0.78331
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:1.3

Field Value
Value 1.3
Uncertainty 0.2
Num. used stations 6
Type of magnitude ML
Reference to an origin 92479861
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-07-09 08:14:45

ML:1.3

Field Value
Value 1.3
Uncertainty 0.2
Num. used stations 6
Type of magnitude ML
Reference to an origin 92749211
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-11-01 16:56:15
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
GU.PCP.HHZ. 2021-07-09T08:03:36.01 0.3 undecidable manual P 70 86.9463 50 0.5 59
GU.BHB.HHE. 2021-07-09T08:03:31.16 0.3 undecidable manual P 342 64.491 50 -0.89 53
GU.RORO.HHE. 2021-07-09T08:03:28.58 0.3 undecidable manual P 113 48.0186 91 -0.38 66
GU.IMI.HHE. 2021-07-09T08:03:28.77 0.3 undecidable manual P 143 51.2154 91 -0.82 56
GU.PZZ.HHE. 2021-07-09T08:03:27.66 0.3 undecidable manual P 309 40.0266 91 0.3 68
GU.MGRO.HHE. 2021-07-09T08:03:26.79 0.3 undecidable manual P 138 35.5422 91 0.34 68
FR.SAOF.HHZ.00 2021-07-09T08:03:26.00 0.3 undecidable manual P 174 32.9448 91 0.07 72
GU.GBOS.HHZ. 2021-07-09T08:03:24.95 0.1 undecidable manual P 99 26.5512 91 0.3 92
GU.STV.HHZ. 2021-07-09T08:03:22.43 0.1 undecidable manual P 255 15.1737 92 0.05 99
GU.ENR.HHZ. 2021-07-09T08:03:21.27 0.1 positive manual P 232 9.2796 93 0.06 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
GU.STV.HHE. ML:1.1 0.0001585 0.6 AML other m 2021-07-09T08:03:26.06
GU.STV.HHN. ML:1.2 0.00017999999999999998 0.54 AML other m 2021-07-09T08:03:27.63
GU.GBOS.HHE. ML:1.4 0.000136 1.52 AML other m 2021-07-09T08:03:32.77
GU.GBOS.HHN. ML:1.6 0.0002245 1.52 AML other m 2021-07-09T08:03:32.02
FR.SAOF.HHN.00 ML:1.3 0.00009045 0.74 AML other m 2021-07-09T08:03:35.51
FR.SAOF.HHE.00 ML:1.3 0.00008915000000000001 0.66 AML other m 2021-07-09T08:03:38.50
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