Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of M 2.3 on date 18-11-1991 and time 15:45:51 (Italy) in region 2 km SE Valgrana (CN)

A magnitude M 2.3 earthquake occured in region: 2 km SE Valgrana (CN), on

  • 18-11-1991 14:45:51 (UTC)
  • 18-11-1991 15:45:51 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.3980, 7.4000 at 7 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
Valgrana CN 2 786 786
Bernezzo CN 3 4104 4890
Caraglio CN 3 6836 11726
Montemale di Cuneo CN 5 241 11967
Rittana CN 5 109 12076
Cervasca CN 6 5013 17089
Monterosso Grana CN 6 505 17594
Valloriate CN 7 109 17703
Gaiola CN 7 582 18285
Vignolo CN 7 2600 20885
Roccasparvera CN 7 741 21626
Dronero CN 8 7035 28661
Moiola CN 9 234 28895
Pradleves CN 10 250 29145
Villar San Costanzo CN 10 1547 30692
Roccabruna CN 10 1585 32277
Borgo San Dalmazzo CN 10 12468 44745
Roccavione CN 11 2761 47506
Cuneo CN 12 56081 103587
Demonte CN 12 2003 105590
Cartignano CN 13 190 105780
Valdieri CN 13 935 106715
Boves CN 14 9835 116550
Busca CN 14 10181 126731
Robilante CN 15 2306 129037
Roaschia CN 15 107 129144
Castelmagno CN 15 66 129210
San Damiano Macra CN 15 430 129640
Tarantasca CN 16 2122 131762
Rossana CN 16 908 132670
Valmala CN 17 52 132722
Aisone CN 17 248 132970
Entracque CN 17 774 133744
Venasca CN 18 1437 135181
Peveragno CN 19 5543 140724
Centallo CN 19 6954 147678
Melle CN 19 292 147970
Brossasco CN 20 1084 149054
Piasco CN 20 2774 151828
Costigliole Saluzzo CN 20 3375 155203
Castelletto Stura CN 20 1351 156554
Celle di Macra CN 20 100 156654
Villafalletto CN 20 2925 159579
Beinette CN 20 3423 163002
Vernante CN 20 1178 164180

Municipalities with at least 50000 inhabitants

An earthquake occurred to
12 Km W of Cuneo (56081 inhabitants)
71 Km SW of Moncalieri (57294 inhabitants)
71 Km NW of Sanremo (54807 inhabitants)
78 Km SW of Torino (890529 inhabitants)
85 Km SW of Asti (76202 inhabitants)
87 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 		M 2.3 1991-11-18
14:45:51		 44.398 7.4 7 2013-07-15
08:40:51		 Bollettino Sismico Italiano INGV 153489
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1991-11-18 14:45:51 ± 0.093
Latitude 44.3980 ± 0.0071
Longitude 7.4000 ± 0.0173
Depth (km) 7 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 153489

Uncertainty

Field Value
Preferred uncertainty description horizontal uncertainty
Semi-major axis of confidence ellipse (meter)
Semi-minor axis of confidence ellipse (meter)
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi)
Circular confidence region, given by single value of horizontal uncertainty (meter) 1584.6
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 113
Number of associated phases, regardless of their use for origin computation 17
Number of defining phases 17
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) 0.00130
Epicentral distance of station farthest from the epicenter (degree) 0.00680
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 9
Magnitude information

M:2.3

Field Value
Value 2.3
Uncertainty
Num. used stations
Type of magnitude M
Reference to an origin 153489
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2015-04-28 09:48:29
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
--.RSP.Z. 1991-11-18T14:46:18.40 10.0 undecidable manual SG 352 0.7548 -0.37 0.2
--.IMI.Z. 1991-11-18T14:46:13.12 10.0 undecidable manual SG 143 0.5883 -0.23 0.5
--.FIN.Z. 1991-11-18T14:46:13.60 10.0 undecidable manual SG 107 0.5994 -0.51 0.1
--.RSP.Z. 1991-11-18T14:46:07.58 10.0 undecidable manual PG 352 0.7548 0.52 0.4
--.ROB.Z. 1991-11-18T14:46:05.69 10.0 undecidable manual SG 105 0.3552 0.39 0.4
--.IMI.Z. 1991-11-18T14:46:04.10 10.0 undecidable manual PG 143 0.5883 -0.04 1.7
--.FIN.Z. 1991-11-18T14:46:04.10 10.0 undecidable manual PG 107 0.5994 -0.16 1.4
--.BHB.Z. 1991-11-18T14:46:01.17 10.0 undecidable manual PG 347 0.444 -0.08 1.8
--.PZZ.Z. 1991-11-18T14:46:01.00 10.0 undecidable manual SG 296 0.2331 -0.05 0.8
--.ROB.Z. 1991-11-18T14:45:59.91 10.0 undecidable manual PG 105 0.3552 0.42 0.8
--.ENR.Z. 1991-11-18T14:45:58.13 10.0 undecidable manual SG 175 0.1665 -0.5 0.3
--.STV.Z. 1991-11-18T14:45:58.50 10.0 undecidable manual SG 198 0.1554 0.04 0.8
--.DOI.Z. 1991-11-18T14:45:58.00 10.0 undecidable manual SG 313 0.1443 0.09 0.9
--.PZZ.Z. 1991-11-18T14:45:57.11 10.0 undecidable manual PG 296 0.2331 0.07 2.2
--.DOI.Z. 1991-11-18T14:45:55.00 10.0 undecidable manual PG 313 0.1443 -0.22 1.4
--.ENR.Z. 1991-11-18T14:45:55.57 10.0 undecidable manual PG 175 0.1665 -0.06 2.2
--.STV.Z. 1991-11-18T14:45:55.57 10.0 undecidable manual PG 198 0.1554 0.29 1.2
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