Earthquake with magnitude of M 2.0 on date 27-02-1991 and time 20:31:53 (Italy) in region 3 km SW Valgrana (CN)

A magnitude M 2.0 earthquake occured in region: 3 km SW Valgrana (CN), on

  • 27-02-1991 19:31:53 (UTC)
  • 27-02-1991 20:31:53 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.39, 7.36 at 8 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.

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 3 786 786
Monterosso Grana CN 3 505 1291
Rittana CN 6 109 1400
Montemale di Cuneo CN 6 241 1641
Valloriate CN 6 109 1750
Bernezzo CN 6 4104 5854
Caraglio CN 7 6836 12690
Pradleves CN 7 250 12940
Gaiola CN 7 582 13522
Moiola CN 8 234 13756
Roccasparvera CN 9 741 14497
Dronero CN 9 7035 21532
Cervasca CN 9 5013 26545
Demonte CN 9 2003 28548
Vignolo CN 10 2600 31148
Roccabruna CN 10 1585 32733
Villar San Costanzo CN 11 1547 34280
Cartignano CN 11 190 34470
Castelmagno CN 12 66 34536
Borgo San Dalmazzo CN 12 12468 47004
Valdieri CN 13 935 47939
Roccavione CN 13 2761 50700
Aisone CN 14 248 50948
San Damiano Macra CN 14 430 51378
Roaschia CN 15 107 51485
Cuneo CN 16 56081 107566
Robilante CN 16 2306 109872
Entracque CN 17 774 110646
Busca CN 17 10181 120827
Vinadio CN 17 644 121471
Boves CN 17 9835 131306
Celle di Macra CN 17 100 131406
Valmala CN 17 52 131458
Rossana CN 18 908 132366
Macra CN 19 59 132425
Tarantasca CN 19 2122 134547
Melle CN 20 292 134839
Venasca CN 20 1437 136276

Municipalities with at least 50000 inhabitants

An earthquake occurred to
16 Km W of Cuneo (56081 inhabitants)
72 Km NW of Sanremo (54807 inhabitants)
73 Km SW of Moncalieri (57294 inhabitants)
80 Km SW of Torino (890529 inhabitants)
88 Km SW of Asti (76202 inhabitants)
90 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
Rev 1000 M 2.0 1991-02-27
19:31:53
44.39 7.36 8 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 136799
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1991-02-27 19:31:53 ± 0.211
Latitude 44.39 ± 0.01
Longitude 7.36 ± 0.02
Depth (km) 8 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 136799

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) 1938.2
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 87
Number of associated phases, regardless of their use for origin computation 16
Number of defining phases 16
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.4
Epicentral distance of station closest to the epicenter (degree) 0.00121
Epicentral distance of station farthest from the epicenter (degree) 0.01093
Number of stations at which the event was observed 12
Number of stations from which data was used for origin computation 12
Magnitude information

M:2

Field Value
Value 2
Uncertainty
Num. used stations
Type of magnitude M
Reference to an origin 136799
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2015-04-28 09:42:56
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.LMR.Z. 1991-02-27T19:32:32.80 10.0 undecidable manual SN 210 0.0109 -0.5 0.4
--.LRG.Z. 1991-02-27T19:32:32.50 10.0 undecidable manual SN 217 0.0105 0.19 0.5
--.FRF.Z. 1991-02-27T19:32:25.80 10.0 undecidable manual SG 211 0.0087 -1.05 0.1
--.LMR.Z. 1991-02-27T19:32:17.20 10.0 undecidable manual PN 210 0.0109 0.76 0.5
--.LRG.Z. 1991-02-27T19:32:16.80 10.0 undecidable manual PN 217 0.0105 0.91 0.4
--.FRF.Z. 1991-02-27T19:32:13.20 10.0 undecidable manual PG 211 0.0087 0.48 1.1
--.PCP.Z. 1991-02-27T19:32:11.16 10.0 undecidable manual PG 79 0.0077 0.48 1.1
--.SBF.Z. 1991-02-27T19:32:11.60 10.0 undecidable manual SG 173 0.0047 -1.01 0.1
--.FIN.Z. 1991-02-27T19:32:06.24 10.0 undecidable manual PG 106 0.0057 -0.26 1.7
--.IMI.Z. 1991-02-27T19:32:05.30 10.0 undecidable manual PG 140 0.0055 -0.79 0.7
--.SBF.Z. 1991-02-27T19:32:05.00 10.0 undecidable manual PG 173 0.0047 0.49 1.3
--.BHB.Z. 1991-02-27T19:32:02.90 10.0 undecidable manual PG 351 0.004 -0.13 1.8
--.ROB.Z. 1991-02-27T19:32:01.92 10.0 undecidable manual PG 103 0.0034 0.18 1.8
--.PZZ.Z. 1991-02-27T19:31:57.82 10.0 undecidable manual PG 302 0.0019 -0.69 0.9
--.ENR.Z. 1991-02-27T19:31:57.42 10.0 undecidable manual PG 164 0.0015 -0.13 1.8
--.STV.Z. 1991-02-27T19:31:56.94 10.0 undecidable manual PG 187 0.0012 -0.02 1.8
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
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