Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of Md 2.0 on date 02-05-1991 and time 20:55:37 (Italy) in region 3 km W Demonte (CN)

A magnitude Md 2.0 earthquake occured in region: 3 km W Demonte (CN), on

  • 02-05-1991 18:55:37 (UTC)
  • 02-05-1991 20:55:37 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.3250, 7.2650 at 13 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
Demonte CN 3 2003 2003
Aisone CN 4 248 2251
Vinadio CN 7 644 2895
Valloriate CN 9 109 3004
Moiola CN 10 234 3238
Castelmagno CN 10 66 3304
Monterosso Grana CN 11 505 3809
Pradleves CN 11 250 4059
Rittana CN 11 109 4168
Gaiola CN 11 582 4750
Valdieri CN 12 935 5685
Valgrana CN 13 786 6471
Entracque CN 14 774 7245
Roccasparvera CN 14 741 7986
Sambuco CN 15 92 8078
Montemale di Cuneo CN 15 241 8319
Bernezzo CN 15 4104 12423
Roaschia CN 16 107 12530
Caraglio CN 17 6836 19366
Vignolo CN 17 2600 21966
Cartignano CN 17 190 22156
Roccavione CN 17 2761 24917
Cervasca CN 18 5013 29930
Dronero CN 18 7035 36965
Borgo San Dalmazzo CN 18 12468 49433
Roccabruna CN 18 1585 51018
San Damiano Macra CN 18 430 51448
Pietraporzio CN 19 77 51525
Celle di Macra CN 19 100 51625
Villar San Costanzo CN 20 1547 53172
Robilante CN 20 2306 55478

Municipalities with at least 50000 inhabitants

An earthquake occurred to
24 Km W of Cuneo (56081 inhabitants)
70 Km NW of Sanremo (54807 inhabitants)
82 Km SW of Moncalieri (57294 inhabitants)
90 Km SW of Torino (890529 inhabitants)
97 Km W of Savona (61345 inhabitants)
98 Km SW of Asti (76202 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 		Md 2.0
M 2.2 		1991-05-02
18:55:37		 44.325 7.265 13 2013-07-15
08:40:51		 Bollettino Sismico Italiano INGV 140419
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1991-05-02 18:55:37 ± 0.171
Latitude 44.3250 ± 0.0107
Longitude 7.2650 ± 0.0214
Depth (km) 13 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 140419

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) 2074.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 110
Number of associated phases, regardless of their use for origin computation 20
Number of defining phases 20
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) 0.00073
Epicentral distance of station farthest from the epicenter (degree) 0.01012
Number of stations at which the event was observed 10
Number of stations from which data was used for origin computation 10
Magnitudes information

Md:2.0

Field Value
Value 2.0
Uncertainty
Num. used stations 1
Type of magnitude Md
Reference to an origin 140419
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 19:11:06

M:2.2

Field Value
Value 2.2
Uncertainty
Num. used stations
Type of magnitude M
Reference to an origin 140419
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(km) Takeoff_angle Residual Weight
--.LMR.Z. 1991-05-02T18:56:13.60 10.0 undecidable manual SN 209 1.1211 -0.75 0.2
--.LRG.Z. 1991-05-02T18:56:12.90 10.0 undecidable manual SN 217 1.0767 -0.41 0.4
--.FRF.Z. 1991-05-02T18:56:06.10 10.0 undecidable manual SG 210 0.8769 -1.68 0
--.FIN.Z. 1991-05-02T18:56:00.50 10.0 undecidable manual SG 99 0.6882 -1.41 0
--.LMR.Z. 1991-05-02T18:55:59.40 10.0 undecidable manual PN 209 1.1211 0.62 0.7
--.LRG.Z. 1991-05-02T18:55:58.60 10.0 undecidable manual PN 217 1.0767 0.42 1
--.FRF.Z. 1991-05-02T18:55:55.40 10.0 undecidable manual PG 210 0.8769 0.41 1.2
--.SBF.Z. 1991-05-02T18:55:54.20 10.0 undecidable manual SG 165 0.4773 -0.55 0.5
--.ROB.Z. 1991-05-02T18:55:53.60 10.0 undecidable manual SG 92 0.4329 0.16 0.8
--.FIN.Z. 1991-05-02T18:55:50.70 10.0 undecidable manual PG 99 0.6882 -0.63 1
--.ROB.Z. 1991-05-02T18:55:47.20 10.0 undecidable manual PG 92 0.4329 0.5 1.4
--.SBF.Z. 1991-05-02T18:55:47.80 10.0 undecidable manual PG 165 0.4773 0.33 1.7
--.DOI.Z. 1991-05-02T18:55:45.30 10.0 undecidable manual SG 355 0.1665 -0.3 0.7
--.PZZ.Z. 1991-05-02T18:55:45.30 10.0 undecidable manual SG 327 0.2109 -1.13 0.1
--.ENR.Z. 1991-05-02T18:55:44.20 10.0 undecidable manual SG 131 0.1443 -0.21 0.8
--.DOI.Z. 1991-05-02T18:55:42.27 10.0 negative manual PG 355 0.1665 0.25 3.7
--.STV.Z. 1991-05-02T18:55:42.80 10.0 undecidable manual SG 147 0.0777 -0.01 0.8
--.PZZ.Z. 1991-05-02T18:55:42.40 10.0 undecidable manual PG 327 0.2109 -0.26 1.8
--.STV.Z. 1991-05-02T18:55:41.10 10.0 undecidable manual PG 147 0.0777 0.53 1.3
--.ENR.Z. 1991-05-02T18:55:41.60 10.0 undecidable manual PG 131 0.1443 0.11 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