Istituto Nazionale di Geofisica e Vulcanologia

Earthquake (quarry blast) with magnitude of ML 1.6 on date 22-06-2021 and time 09:45:24 (Italy) in region 2 km S Robilante (CN)

A magnitude ML 1.6 (quarry blast) earthquake occured in region: 2 km S Robilante (CN), on

  • 22-06-2021 07:45:24 (UTC)
  • 22-06-2021 09:45:24 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.2800, 7.5100 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.

Hai sentito il terremoto? Clicca qui

Did you feel it? Fill in the questionnaire.

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 5 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 14 4104 106965
Chiusa di Pesio CN 14 3676 110641
Beinette CN 15 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)
78 Km W of Savona (61345 inhabitants)
82 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 1.6 2021-06-22
07:45:24		 44.2802 7.5097 1 2021-12-29
11:12:37		 Bollettino Sismico Italiano INGV 96703991
Reviewed
Rev100 		ML 1.6 2021-06-22
07:45:25		 44.2592 7.4588 11 2021-06-22
07:56:56		 Sala Sismica INGV-Roma 91697171
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-06-22 07:45:24 ± 0.16
Latitude 44.2802 ± 0.0117
Longitude 7.5097 ± 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 96703991

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1320
Semi-minor axis of confidence ellipse (meter) 1050
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) 1320.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 56
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) 0.46
Epicentral distance of station closest to the epicenter (degree) 0.08274
Epicentral distance of station farthest from the epicenter (degree) 0.84716
Number of stations at which the event was observed 14
Number of stations from which data was used for origin computation 14
Magnitudes information

ML:1.6

Field Value
Value 1.6
Uncertainty 0.1
Num. used stations 12
Type of magnitude ML
Reference to an origin 96703991
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-10-31 17:07:37

ML:1.6

Field Value
Value 1.6
Uncertainty 0.2
Num. used stations 16
Type of magnitude ML
Reference to an origin 91697171
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-06-22 07:56:56
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MONC.HHE. 2021-06-22T07:45:43.43 0.3 undecidable manual P 20 94.0392 50 1.39 40
GU.RRL.HHE. 2021-06-22T07:45:41.24 0.3 undecidable manual P 322 91.0422 50 -0.34 63
GU.PCP.HHZ. 2021-06-22T07:45:41.51 0.3 undecidable manual P 70 87.0462 50 0.55 60
IV.QLNO.HHE. 2021-06-22T07:45:37.52 0.3 undecidable manual P 85 66.5778 50 -0.29 67
GU.BHB.HHZ. 2021-06-22T07:45:36.69 0.3 undecidable manual P 343 64.5909 50 -0.82 56
GU.BURY.HNN. 2021-06-22T07:45:35.38 0.3 undecidable manual P 176 55.3002 91 -0.48 66
GU.CANO.HHE. 2021-06-22T07:45:35.96 0.3 undecidable manual P 98 58.3971 90 -0.51 65
GU.RORO.HHZ. 2021-06-22T07:45:34.29 0.3 undecidable manual P 113 48.0186 91 -0.11 72
GU.IMI.HHZ. 2021-06-22T07:45:34.66 0.3 undecidable manual P 143 51.1155 91 -0.36 68
GU.PZZ.HHZ. 2021-06-22T07:45:32.43 0.3 undecidable manual P 309 40.0266 91 -0.38 69
FR.SAOF.HHZ.00 2021-06-22T07:45:31.39 0.1 positive manual P 174 32.8449 91 0.04 100
GU.GBOS.HHZ. 2021-06-22T07:45:30.67 0.1 positive manual P 99 26.5512 91 0.57 89
GU.STV.HHZ. 2021-06-22T07:45:28.08 0.1 positive manual P 255 15.0738 92 0.28 98
GU.ENR.HHZ. 2021-06-22T07:45:27.04 0.1 positive manual P 232 9.1797 93 0.42 96
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
GU.GBOS.HHE. ML:1.5 0.00019 0.32 AML other m 2021-06-22T07:45:35.71
GU.GBOS.HHN. ML:1.6 0.00022299999999999997 0.44 AML other m 2021-06-22T07:45:37.22
FR.SAOF.HHN.00 ML:1.3 0.00010115 0.38 AML other m 2021-06-22T07:45:38.91
GU.PZZ.HHN. ML:1.6 0.00016049999999999997 1.52 AML other m 2021-06-22T07:45:39.08
FR.SAOF.HHE.00 ML:1.4 0.00010869999999999999 1.62 AML other m 2021-06-22T07:45:40.90
GU.PZZ.HHE. ML:1.6 0.0001385 0.26 AML other m 2021-06-22T07:45:41.04
GU.RORO.HHE. ML:1.6 0.00010825 0.44 AML other m 2021-06-22T07:45:42.31
GU.RORO.HHN. ML:1.6 0.00010389999999999999 0.9 AML other m 2021-06-22T07:45:42.30
GU.BHB.HHE. ML:1.6 0.00007189999999999999 0.48 AML other m 2021-06-22T07:45:45.32
GU.BHB.HHN. ML:1.4 0.000051250000000000006 0.8 AML other m 2021-06-22T07:45:46.65
GU.PCP.HHE. ML:1.8 0.00007209999999999999 0.76 AML other m 2021-06-22T07:45:53.13
GU.PCP.HHN. ML:1.7 0.000060200000000000006 0.8 AML other m 2021-06-22T07:45:57.07
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