Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.7 on date 14-08-2020 and time 09:02:32 (UTC) in region 4 km NE Castelmagno (CN)

A magnitude ML 1.7 earthquake occured in region: 4 km NE Castelmagno (CN), on

  • 14-08-2020 09:02:32 (UTC)
  • 14-08-2020 11:02:32 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.4380, 7.2390 at 12 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

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
Castelmagno CN 4 66 66
Pradleves CN 4 250 316
San Damiano Macra CN 6 430 746
Cartignano CN 6 190 936
Celle di Macra CN 7 100 1036
Monterosso Grana CN 8 505 1541
Macra CN 8 59 1600
Roccabruna CN 9 1585 3185
Dronero CN 11 7035 10220
Montemale di Cuneo CN 11 241 10461
Marmora CN 12 68 10529
Stroppo CN 12 103 10632
Valgrana CN 12 786 11418
Villar San Costanzo CN 12 1547 12965
Canosio CN 13 80 13045
Aisone CN 14 248 13293
Demonte CN 14 2003 15296
Valmala CN 15 52 15348
Caraglio CN 15 6836 22184
Frassino CN 15 265 22449
Vinadio CN 15 644 23093
Melle CN 15 292 23385
Prazzo CN 15 170 23555
Valloriate CN 16 109 23664
Rittana CN 16 109 23773
Sampeyre CN 16 1022 24795
Elva CN 16 97 24892
Bernezzo CN 17 4104 28996
Sambuco CN 17 92 29088
Gaiola CN 18 582 29670
Moiola CN 18 234 29904
Brossasco CN 18 1084 30988
Venasca CN 19 1437 32425
Cervasca CN 19 5013 37438
Roccasparvera CN 19 741 38179
Pietraporzio CN 19 77 38256
Rossana CN 19 908 39164

Municipalities with at least 50000 inhabitants

An earthquake occurred to
25 Km W of Cuneo (56081 inhabitants)
72 Km SW of Moncalieri (57294 inhabitants)
79 Km SW of Torino (890529 inhabitants)
81 Km NW of Sanremo (54807 inhabitants)
92 Km SW of Asti (76202 inhabitants)
100 Km W of Savona (61345 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 1.7 2020-08-14
09:02:32		 44.4383 7.2392 12 2020-11-19
12:36:58		 Bollettino Sismico Italiano INGV 82289821
Reviewed
Rev100 		ML 1.7 2020-08-14
09:02:32		 44.4383 7.2348 11 2020-08-14
09:10:30		 Sala Sismica INGV-Roma 81964361
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-08-14 09:02:32 ± 0.13
Latitude 44.4383 ± 0.0063
Longitude 7.2392 ± 0.0113
Depth (km) 12 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 82289821

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 856
Semi-minor axis of confidence ellipse (meter) 659
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 40
Circular confidence region, given by single value of horizontal uncertainty (meter) 860.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 149
Number of associated phases, regardless of their use for origin computation 21
Number of defining phases 21
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.28
Epicentral distance of station closest to the epicenter (degree) 0.11152
Epicentral distance of station farthest from the epicenter (degree) 1.07829
Number of stations at which the event was observed 12
Number of stations from which data was used for origin computation 12
Magnitudes information

ML:1.7

Field Value
Value 1.7
Uncertainty 0.3
Num. used stations 12
Type of magnitude ML
Reference to an origin 81964361
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-08-14 09:10:30

ML:1.7

Field Value
Value 1.7
Uncertainty 0.3
Num. used stations 12
Type of magnitude ML
Reference to an origin 82289821
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-08-25 09:30:09
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
GU.PCP.HHZ. 2020-08-14T09:03:03.20 0.6 undecidable manual S 83 104.0181 90 0.11 42
IV.QLNO.HHN. 2020-08-14T09:02:58.42 0.6 undecidable manual S 98 88.6446 91 -0.58 38
IV.IMI.HHZ. 2020-08-14T09:02:56.30 0.6 undecidable manual S 138 78.366 91 0.05 45
GU.RORO.HHZ. 2020-08-14T09:02:54.90 0.6 undecidable manual S 119 74.9694 91 -0.45 41
RD.ORIF.BHZ. 2020-08-14T09:02:53.47 0.6 undecidable manual P 297 119.6913 90 0.73 35
GU.RRL.HHE. 2020-08-14T09:02:52.00 0.6 undecidable manual S 327 64.0914 91 -0.45 41
GU.LSD.HHN. 2020-08-14T09:02:51.96 0.6 undecidable manual P 356 113.5974 90 0.17 41
GU.MGRO.HHZ. 2020-08-14T09:02:51.90 0.6 undecidable manual S 134 63.0924 91 -0.26 43
GU.PCP.HHZ. 2020-08-14T09:02:50.66 0.1 negative manual P 83 104.0181 90 0.34 81
GU.GBOS.HHZ. 2020-08-14T09:02:48.80 0.3 undecidable manual S 114 52.4031 91 -0.53 62
IV.QLNO.HHN. 2020-08-14T09:02:48.35 0.3 undecidable manual P 98 88.6446 91 0.39 62
IV.IMI.HHZ. 2020-08-14T09:02:46.79 0.3 undecidable manual P 138 78.366 91 0.42 63
GU.RORO.HHZ. 2020-08-14T09:02:45.89 0.3 undecidable manual P 119 74.9694 91 0.04 68
GU.RRL.HHE. 2020-08-14T09:02:44.26 0.3 undecidable manual P 327 64.0914 91 0.08 69
GU.MGRO.HHZ. 2020-08-14T09:02:44.18 0.1 positive manual P 134 63.0924 91 0.17 90
GU.ENR.HHZ. 2020-08-14T09:02:42.20 0.3 undecidable manual S 148 27.5502 93 -0.49 66
GU.GBOS.HHZ. 2020-08-14T09:02:42.41 0.1 positive manual P 114 52.4031 91 0.04 94
GU.BHB.HHZ. 2020-08-14T09:02:40.97 0.6 undecidable manual P 2 44.0226 91 -0.11 46
GU.ENR.HHZ. 2020-08-14T09:02:38.69 0.1 negative manual P 148 27.5502 93 0.15 97
GU.PZZ.HHZ. 2020-08-14T09:02:38.30 0.3 undecidable manual S 308 12.3765 115 -0.4 69
GU.PZZ.HHZ. 2020-08-14T09:02:36.37 0.1 positive manual P 308 12.3765 115 0.13 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
GU.PZZ.HHE. ML:1.7 0.0005955 0.28 AML other m 2020-08-14T09:02:38.49
GU.PZZ.HHN. ML:2.0 0.001105 0.44 AML other m 2020-08-14T09:02:38.58
GU.ENR.HHE. ML:1.7 0.000238 0.16 AML other m 2020-08-14T09:02:42.39
GU.ENR.HHN. ML:1.6 0.0002155 0.44 AML other m 2020-08-14T09:02:42.75
GU.GBOS.HHE. ML:1.8 0.00016 1.72 AML other m 2020-08-14T09:02:49.07
GU.GBOS.HHN. ML:1.5 0.00007375 0.16 AML other m 2020-08-14T09:02:49.20
GU.MGRO.HHN. ML:1.4 0.00004425 0.42 AML other m 2020-08-14T09:02:52.86
GU.MGRO.HNN. ML:2.0 0.00019 0.4 AML other m 2020-08-14T09:02:53.67
GU.MGRO.HNE. ML:2.1 0.0002665 0.42 AML other m 2020-08-14T09:02:53.72
GU.MGRO.HHE. ML:1.3 0.00003805 0.74 AML other m 2020-08-14T09:02:54.45
IV.IMI.HHE. ML:1.5 0.00004255 0.9 AML other m 2020-08-14T09:02:57.24
IV.IMI.HHN. ML:1.6 0.0000544 0.9 AML other m 2020-08-14T09:02:57.83
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