Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of Md 2.1 on date 18-12-1987 and time 15:12:38 (UTC) in region 1 km W Rossana (CN)

A magnitude Md 2.1 earthquake occured in region: 1 km W Rossana (CN), on

  • 18-12-1987 15:12:38 (UTC)
  • 18-12-1987 16:12:38 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.5490, 7.4190 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.

Hai sentito il terremoto? Clicca qui

Did you feel it? Fill in the questionnaire.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Rossana CN 1 908 908
Venasca CN 2 1437 2345
Piasco CN 4 2774 5119
Brossasco CN 5 1084 6203
Isasca CN 5 76 6279
Costigliole Saluzzo CN 6 3375 9654
Valmala CN 6 52 9706
Busca CN 6 10181 19887
Brondello CN 6 290 20177
Pagno CN 7 585 20762
Verzuolo CN 8 6459 27221
Villar San Costanzo CN 8 1547 28768
Melle CN 8 292 29060
Castellar CN 8 295 29355
Manta CN 9 3787 33142
Martiniana Po CN 10 734 33876
Villafalletto CN 10 2925 36801
Dronero CN 10 7035 43836
Roccabruna CN 10 1585 45421
Gambasca CN 11 371 45792
Frassino CN 12 265 46057
Tarantasca CN 12 2122 48179
Revello CN 12 4262 52441
Saluzzo CN 12 16960 69401
Rifreddo CN 13 1078 70479
Montemale di Cuneo CN 13 241 70720
Vottignasco CN 13 537 71257
Cartignano CN 13 190 71447
Sanfront CN 13 2395 73842
Lagnasco CN 14 1453 75295
San Damiano Macra CN 14 430 75725
Caraglio CN 15 6836 82561
Centallo CN 15 6954 89515
Envie CN 15 2074 91589
Valgrana CN 16 786 92375
Monterosso Grana CN 17 505 92880
Bernezzo CN 18 4104 96984
Pradleves CN 18 250 97234
Sampeyre CN 19 1022 98256
Cervasca CN 19 5013 103269
Paesana CN 19 2784 106053
Scarnafigi CN 19 2162 108215
Macra CN 20 59 108274
Genola CN 20 2625 110899

Municipalities with at least 50000 inhabitants

An earthquake occurred to
20 Km NW of Cuneo (56081 inhabitants)
55 Km SW of Moncalieri (57294 inhabitants)
62 Km SW of Torino (890529 inhabitants)
73 Km SW of Asti (76202 inhabitants)
86 Km NW of Sanremo (54807 inhabitants)
89 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 2.1 1987-12-18
15:12:38		 44.549 7.419 10 2013-07-15
08:40:51		 Bollettino Sismico Italiano INGV 59759
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1987-12-18 15:12:38 ± 0.148
Latitude 44.5490 ± 0.0084
Longitude 7.4190 ± 0.0104
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 59759

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) 1249.8
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 131
Number of associated phases, regardless of their use for origin computation 18
Number of defining phases 18
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) 0.00113
Epicentral distance of station farthest from the epicenter (degree) 0.00648
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 9
Magnitude information

Md:2.1

Field Value
Value 2.1
Uncertainty
Num. used stations 2
Type of magnitude Md
Reference to an origin 59759
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:57:05
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
--.IMP.Z. 1987-12-18T15:13:03.80 10.0 undecidable manual SG 151 0.7104 0.25 0.5
--.BNI.Z. 1987-12-18T15:13:03.22 10.0 undecidable manual SG 313 0.7215 -0.66 0.1
--.FIN.Z. 1987-12-18T15:13:02.40 10.0 undecidable manual SG 120 0.6549 0.71 0.1
--.RRL.Z. 1987-12-18T15:13:00.80 10.0 undecidable manual SG 309 0.5772 0.79 0
--.RSP.Z. 1987-12-18T15:12:59.70 10.0 undecidable manual SG 349 0.6105 -0.54 0.2
--.ROB.Z. 1987-12-18T15:12:53.90 10.0 undecidable manual SG 126 0.3996 0.29 0.5
--.IMP.Z. 1987-12-18T15:12:53.10 10.0 undecidable manual PG 151 0.7104 0.11 1.5
--.BNI.Z. 1987-12-18T15:12:53.54 10.0 undecidable manual PG 313 0.7215 0.35 0.9
--.FIN.Z. 1987-12-18T15:12:51.70 10.0 undecidable manual PG 120 0.6549 -0.22 1.3
--.RRL.Z. 1987-12-18T15:12:50.80 10.0 undecidable manual PG 309 0.5772 0.26 1.3
--.RSP.Z. 1987-12-18T15:12:50.80 10.0 undecidable manual PG 349 0.6105 -0.28 1.2
--.STV.Z. 1987-12-18T15:12:49.80 10.0 undecidable manual SG 192 0.2997 -0.49 0.2
--.ROB.Z. 1987-12-18T15:12:47.10 10.0 undecidable manual PG 126 0.3996 -0.15 1.8
--.SOO.Z. 1987-12-18T15:12:47.90 10.0 undecidable manual SG 259 0.222 -0.04 0.8
--.STV.Z. 1987-12-18T15:12:45.00 10.0 undecidable manual PG 192 0.2997 -0.34 1.1
--.DOI.Z. 1987-12-18T15:12:44.72 10.0 undecidable manual SG 249 0.1221 0.05 0.8
--.SOO.Z. 1987-12-18T15:12:44.10 10.0 undecidable manual PG 259 0.222 0.12 1.9
--.DOI.Z. 1987-12-18T15:12:42.10 10.0 positive manual PG 249 0.1221 0.01 4
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