Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of Md 2.0 on date 02-02-1987 and time 19:23:07 (Italy) in region 1 km W Melle (CN)

A magnitude Md 2.0 earthquake occured in region: 1 km W Melle (CN), on

  • 02-02-1987 18:23:07 (UTC)
  • 02-02-1987 19:23:07 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.5600, 7.3090 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
Melle CN 1 292 292
Frassino CN 3 265 557
Valmala CN 3 52 609
Brossasco CN 4 1084 1693
Isasca CN 7 76 1769
Venasca CN 7 1437 3206
Gambasca CN 8 371 3577
Martiniana Po CN 9 734 4311
Brondello CN 9 290 4601
San Damiano Macra CN 9 430 5031
Cartignano CN 9 190 5221
Roccabruna CN 10 1585 6806
Sanfront CN 10 2395 9201
Sampeyre CN 10 1022 10223
Rossana CN 10 908 11131
Villar San Costanzo CN 10 1547 12678
Rifreddo CN 11 1078 13756
Dronero CN 11 7035 20791
Pagno CN 11 585 21376
Piasco CN 12 2774 24150
Macra CN 12 59 24209
Castellar CN 12 295 24504
Revello CN 12 4262 28766
Celle di Macra CN 13 100 28866
Costigliole Saluzzo CN 14 3375 32241
Busca CN 14 10181 42422
Paesana CN 14 2784 45206
Montemale di Cuneo CN 14 241 45447
Envie CN 15 2074 47521
Verzuolo CN 15 6459 53980
Manta CN 15 3787 57767
Stroppo CN 16 103 57870
Pradleves CN 16 250 58120
Oncino CN 16 76 58196
Monterosso Grana CN 17 505 58701
Elva CN 17 97 58798
Saluzzo CN 18 16960 75758
Valgrana CN 18 786 76544
Ostana CN 18 83 76627
Castelmagno CN 18 66 76693
Villafalletto CN 18 2925 79618
Caraglio CN 18 6836 86454
Barge CN 19 7774 94228
Casteldelfino CN 19 157 94385
Crissolo CN 20 168 94553

Municipalities with at least 50000 inhabitants

An earthquake occurred to
27 Km NW of Cuneo (56081 inhabitants)
58 Km SW of Moncalieri (57294 inhabitants)
64 Km SW of Torino (890529 inhabitants)
80 Km W of Asti (76202 inhabitants)
90 Km NW of Sanremo (54807 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 		1987-02-02
18:23:07		 44.56 7.309 10 2013-07-15
08:40:51		 Bollettino Sismico Italiano INGV 40329
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1987-02-02 18:23:07 ± 0.203
Latitude 44.5600 ± 0.0141
Longitude 7.3090 ± 0.0206
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 40329

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) 2261.2
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 104
Number of associated phases, regardless of their use for origin computation 31
Number of defining phases 31
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.7
Epicentral distance of station closest to the epicenter (degree) 0.00065
Epicentral distance of station farthest from the epicenter (degree) 0.01214
Number of stations at which the event was observed 16
Number of stations from which data was used for origin computation 16
Magnitudes information

Md:2.0

Field Value
Value 2.0
Uncertainty
Num. used stations 2
Type of magnitude Md
Reference to an origin 40329
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:40:17

M:2.2

Field Value
Value 2.2
Uncertainty
Num. used stations
Type of magnitude M
Reference to an origin 40329
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
--.LMR.Z. 1987-02-02T18:23:50.20 10.0 undecidable manual SN 205 1.3431 -0.19 0.6
--.LRG.Z. 1987-02-02T18:23:49.20 10.0 undecidable manual SN 211 1.2987 0.13 0.6
--.LPL.Z. 1987-02-02T18:23:41.50 10.0 undecidable manual SN 337 1.0323 -1.41 0.2
--.LPG.Z. 1987-02-02T18:23:40.89 10.0 undecidable manual SG 337 1.0101 -1.41 0.2
--.LSD.Z. 1987-02-02T18:23:38.50 10.0 undecidable manual SG 353 0.8991 -0.2 0.7
--.LMR.Z. 1987-02-02T18:23:33.30 10.0 undecidable manual PN 205 1.3431 0.91 0.9
--.IMP.Z. 1987-02-02T18:23:32.60 10.0 undecidable manual SG 146 0.7659 -1.7 0.2
--.LRG.Z. 1987-02-02T18:23:32.50 10.0 undecidable manual PN 211 1.2987 0.88 0.9
--.FIN.Z. 1987-02-02T18:23:31.80 10.0 undecidable manual SG 118 0.7326 -1.4 0.3
--.CKI.Z. 1987-02-02T18:23:31.50 10.0 undecidable manual SG 101 0.6993 -0.82 0.6
--.SBF.Z. 1987-02-02T18:23:30.50 10.0 undecidable manual SG 172 0.6993 -1.75 0.1
--.LPL.Z. 1987-02-02T18:23:29.10 10.0 undecidable manual PN 337 1.0323 1.04 0.9
--.FRF.Z. 1987-02-02T18:23:29.60 10.0 undecidable manual PN 205 1.11 0.62 1.3
--.LPG.Z. 1987-02-02T18:23:28.80 10.0 undecidable manual PG 337 1.0101 1.09 0.9
--.RSP.Z. 1987-02-02T18:23:27.00 10.0 undecidable manual SG 356 0.5883 -1.7 0.2
--.LSD.Z. 1987-02-02T18:23:26.60 10.0 undecidable manual PG 353 0.8991 0.97 1.1
--.RRL.Z. 1987-02-02T18:23:25.10 10.0 undecidable manual SG 314 0.5106 -1.24 0.3
--.ROB.Z. 1987-02-02T18:23:24.60 10.0 undecidable manual SG 122 0.4773 -0.42 0.8
--.FIN.Z. 1987-02-02T18:23:22.40 10.0 undecidable manual PG 118 0.7326 -0.05 2.1
--.CKI.Z. 1987-02-02T18:23:22.50 10.0 undecidable manual PG 101 0.6993 0.55 1.8
--.IMP.Z. 1987-02-02T18:23:22.50 10.0 undecidable manual PG 146 0.7659 -0.59 1.7
--.SBF.Z. 1987-02-02T18:23:22.90 10.0 undecidable manual PG 172 0.6993 0.99 1.2
--.ROB.Z. 1987-02-02T18:23:18.10 10.0 undecidable manual PG 122 0.4773 0.37 1.9
--.RRL.Z. 1987-02-02T18:23:18.20 10.0 undecidable manual PG 314 0.5106 -0.29 2
--.RSP.Z. 1987-02-02T18:23:18.40 10.0 undecidable manual PG 356 0.5883 -1.45 0.6
--.STV.Z. 1987-02-02T18:23:17.90 10.0 undecidable manual SG 177 0.3108 -1.7 0.2
--.STV.Z. 1987-02-02T18:23:14.10 10.0 undecidable manual PG 177 0.3108 -0.5 1.8
--.SOO.Z. 1987-02-02T18:23:13.00 10.0 undecidable manual SG 249 0.1554 -1.77 0.2
--.DA9.Z. 1987-02-02T18:23:12.00 10.0 undecidable manual SG 218 0.0666 -0.27 1.2
--.SOO.Z. 1987-02-02T18:23:11.10 10.0 undecidable manual PG 249 0.1554 -0.71 1.6
--.DA9.Z. 1987-02-02T18:23:10.50 10.0 negative manual PG 218 0.0666 0.13 4.2
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
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QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download