Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of Md 2.0 on date 13-10-1987 and time 06:40:52 (Italy) in region 2 km SW Pradleves (CN)

A magnitude Md 2.0 earthquake occured in region: 2 km SW Pradleves (CN), on

  • 13-10-1987 05:40:52 (UTC)
  • 13-10-1987 06:40:52 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.4010, 7.2750 at 10 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
Pradleves CN 2 250 250
Monterosso Grana CN 4 505 755
Castelmagno CN 5 66 821
Valgrana CN 9 786 1607
Cartignano CN 9 190 1797
Montemale di Cuneo CN 9 241 2038
Demonte CN 10 2003 4041
San Damiano Macra CN 10 430 4471
Roccabruna CN 10 1585 6056
Dronero CN 10 7035 13091
Aisone CN 11 248 13339
Valloriate CN 11 109 13448
Rittana CN 12 109 13557
Celle di Macra CN 12 100 13657
Caraglio CN 12 6836 20493
Villar San Costanzo CN 13 1547 22040
Moiola CN 13 234 22274
Gaiola CN 13 582 22856
Bernezzo CN 13 4104 26960
Vinadio CN 13 644 27604
Macra CN 13 59 27663
Roccasparvera CN 15 741 28404
Cervasca CN 16 5013 33417
Marmora CN 16 68 33485
Vignolo CN 16 2600 36085
Canosio CN 17 80 36165
Stroppo CN 17 103 36268
Valdieri CN 17 935 37203
Valmala CN 17 52 37255
Sambuco CN 17 92 37347
Melle CN 18 292 37639
Borgo San Dalmazzo CN 19 12468 50107
Roccavione CN 19 2761 52868
Frassino CN 19 265 53133
Prazzo CN 20 170 53303

Municipalities with at least 50000 inhabitants

An earthquake occurred to
22 Km W of Cuneo (56081 inhabitants)
74 Km SW of Moncalieri (57294 inhabitants)
76 Km NW of Sanremo (54807 inhabitants)
82 Km SW of Torino (890529 inhabitants)
92 Km SW of Asti (76202 inhabitants)
97 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 		Md 2.0
M 2.2 		1987-10-13
05:40:52		 44.401 7.275 10 2013-07-15
08:40:51		 Bollettino Sismico Italiano INGV 56869
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1987-10-13 05:40:52 ± 0.114
Latitude 44.4010 ± 0.0079
Longitude 7.2750 ± 0.0139
Depth (km) 10 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 56869

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) 1412.1
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 107
Number of associated phases, regardless of their use for origin computation 28
Number of defining phases 28
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.3
Epicentral distance of station closest to the epicenter (degree) 0.00089
Epicentral distance of station farthest from the epicenter (degree) 0.01077
Number of stations at which the event was observed 14
Number of stations from which data was used for origin computation 14
Magnitudes information

Md:2.0

Field Value
Value 2.0
Uncertainty
Num. used stations 1
Type of magnitude Md
Reference to an origin 56869
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:54:34

M:2.2

Field Value
Value 2.2
Uncertainty
Num. used stations
Type of magnitude M
Reference to an origin 56869
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. 1987-10-13T05:41:31.00 10.0 undecidable manual SN 207 1.1988 -0.28 0.5
--.LRG.Z. 1987-10-13T05:41:30.20 10.0 undecidable manual SN 215 1.1544 0.07 0.6
--.LPL.Z. 1987-10-13T05:41:30.50 10.0 undecidable manual SN 341 1.1766 -0.24 0.6
--.LPG.Z. 1987-10-13T05:41:29.79 10.0 undecidable manual SN 341 1.1544 -0.42 0.4
--.LSD.Z. 1987-10-13T05:41:26.80 10.0 undecidable manual SN 355 1.0545 -1.09 0.1
--.FRF.Z. 1987-10-13T05:41:23.79 10.0 undecidable manual SG 208 0.9546 -0.99 0.1
--.FIN.Z. 1987-10-13T05:41:16.40 10.0 undecidable manual SG 105 0.6882 -0.06 0.8
--.LMR.Z. 1987-10-13T05:41:15.40 10.0 undecidable manual PN 207 1.1988 0.62 0.7
--.LPL.Z. 1987-10-13T05:41:15.10 10.0 undecidable manual PN 341 1.1766 0.63 0.7
--.LPG.Z. 1987-10-13T05:41:14.60 10.0 undecidable manual PN 341 1.1544 0.43 1.1
--.LRG.Z. 1987-10-13T05:41:14.90 10.0 undecidable manual PN 215 1.1544 0.78 0.5
--.IMP.Z. 1987-10-13T05:41:14.40 10.0 undecidable manual SG 137 0.6438 -0.85 0.2
--.RRL.Z. 1987-10-13T05:41:13.60 10.0 undecidable manual SG 326 0.6216 -0.63 0.4
--.LSD.Z. 1987-10-13T05:41:12.40 10.0 undecidable manual PN 355 1.0545 -0.43 1.2
--.FRF.Z. 1987-10-13T05:41:11.30 10.0 undecidable manual PG 208 0.9546 0.27 1.5
--.SBF.Z. 1987-10-13T05:41:10.50 10.0 undecidable manual SG 167 0.5439 -1.31 0
--.ROB.Z. 1987-10-13T05:41:08.00 10.0 undecidable manual SG 102 0.4329 -0.23 0.7
--.FIN.Z. 1987-10-13T05:41:06.20 10.0 undecidable manual PG 105 0.6882 -0.03 2
--.IMP.Z. 1987-10-13T05:41:05.60 10.0 undecidable manual PG 137 0.6438 0.07 2
--.RRL.Z. 1987-10-13T05:41:04.70 10.0 undecidable manual PG 326 0.6216 -0.24 1.9
--.SBF.Z. 1987-10-13T05:41:04.00 10.0 undecidable manual PG 167 0.5439 0.46 1.4
--.ROB.Z. 1987-10-13T05:41:01.80 10.0 undecidable manual PG 102 0.4329 0.32 1.7
--.STV.Z. 1987-10-13T05:40:58.20 10.0 undecidable manual SG 165 0.1554 -0.94 0.1
--.SOO.Z. 1987-10-13T05:40:58.50 10.0 undecidable manual SG 309 0.1554 -0.85 0.2
--.DOI.Z. 1987-10-13T05:40:57.40 10.0 undecidable manual SG 348 0.0999 -0.16 1.2
--.STV.Z. 1987-10-13T05:40:56.10 10.0 undecidable manual PG 165 0.1554 -0.12 2
--.SOO.Z. 1987-10-13T05:40:56.20 10.0 undecidable manual PG 309 0.1554 -0.15 2
--.DOI.Z. 1987-10-13T05:40:55.60 10.0 negative manual PG 348 0.0999 0.29 3.5
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