Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of Md 2.3 on date 08-10-1987 and time 10:58:47 (UTC) in region 1 km E Roaschia (CN)

A magnitude Md 2.3 earthquake occured in region: 1 km E Roaschia (CN), on

  • 08-10-1987 10:58:47 (UTC)
  • 08-10-1987 11:58:47 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.2680, 7.4700 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
Roaschia CN 1 107 107
Robilante CN 5 2306 2413
Roccavione CN 5 2761 5174
Vernante CN 6 1178 6352
Valdieri CN 6 935 7287
Entracque CN 6 774 8061
Borgo San Dalmazzo CN 7 12468 20529
Roccasparvera CN 9 741 21270
Moiola CN 9 234 21504
Gaiola CN 9 582 22086
Boves CN 10 9835 31921
Vignolo CN 10 2600 34521
Rittana CN 11 109 34630
Valloriate CN 11 109 34739
Limone Piemonte CN 11 1485 36224
Cervasca CN 13 5013 41237
Peveragno CN 14 5543 46780
Bernezzo CN 14 4104 50884
Demonte CN 15 2003 52887
Cuneo CN 16 56081 108968
Caraglio CN 17 6836 115804
Valgrana CN 17 786 116590
Beinette CN 18 3423 120013
Chiusa di Pesio CN 18 3676 123689
Monterosso Grana CN 20 505 124194

Municipalities with at least 50000 inhabitants

An earthquake occurred to
16 Km SW of Cuneo (56081 inhabitants)
56 Km NW of Sanremo (54807 inhabitants)
81 Km W of Savona (61345 inhabitants)
83 Km S of Moncalieri (57294 inhabitants)
91 Km S of Torino (890529 inhabitants)
91 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 2.3
M 2.3 		1987-10-08
10:58:47		 44.268 7.47 10 2013-07-15
08:40:51		 Bollettino Sismico Italiano INGV 56679
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1987-10-08 10:58:47 ± 0.153
Latitude 44.2680 ± 0.0148
Longitude 7.4700 ± 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 56679

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) 1983.9
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 121
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) 0.00089
Epicentral distance of station farthest from the epicenter (degree) 0.00801
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 9
Magnitudes information

Md:2.3

Field Value
Value 2.3
Uncertainty
Num. used stations 2
Type of magnitude Md
Reference to an origin 56679
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:54:25

M:2.3

Field Value
Value 2.3
Uncertainty
Num. used stations
Type of magnitude M
Reference to an origin 56679
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
--.RSP.Z. 1987-10-08T10:59:17.00 10.0 undecidable manual SG 350 0.888 -0.77 0
--.RRL.Z. 1987-10-08T10:59:12.70 10.0 undecidable manual SG! 323 0.8103 -2.45 0
--.CKI.Z. 1987-10-08T10:59:08.30 10.0 undecidable manual SG 74 0.5883 0.09 0.7
--.FIN.Z. 1987-10-08T10:59:05.40 10.0 undecidable manual SG 96 0.5328 -0.73 0.1
--.RSP.Z. 1987-10-08T10:59:04.60 10.0 undecidable manual PG 350 0.888 -0.21 1.1
--.IMP.Z. 1987-10-08T10:59:03.10 10.0 undecidable manual SG 138 0.4551 -0.84 0
--.RRL.Z. 1987-10-08T10:59:03.20 10.0 undecidable manual PG 323 0.8103 -0.1 1.3
--.CKI.Z. 1987-10-08T10:58:59.50 10.0 undecidable manual PG 74 0.5883 0.21 1.4
--.SOO.Z. 1987-10-08T10:58:59.90 10.0 undecidable manual SG 311 0.3552 -0.48 0.3
--.DOI.Z. 1987-10-08T10:58:58.00 10.0 undecidable manual SG 325 0.2775 -0.16 1
--.ROB.Z. 1987-10-08T10:58:58.70 10.0 undecidable manual SG 83 0.2886 0.34 0.4
--.FIN.Z. 1987-10-08T10:58:58.00 10.0 undecidable manual PG 96 0.5328 -0.09 1.7
--.IMP.Z. 1987-10-08T10:58:56.90 10.0 undecidable manual PG 138 0.4551 0.07 1.9
--.SOO.Z. 1987-10-08T10:58:54.90 10.0 undecidable manual PG 311 0.3552 0.13 1.8
--.ROB.Z. 1987-10-08T10:58:53.90 10.0 undecidable manual PG 83 0.2886 0.3 1.3
--.DOI.Z. 1987-10-08T10:58:53.80 10.0 positive manual PG 325 0.2775 0.31 2.4
--.STV.Z. 1987-10-08T10:58:51.90 10.0 undecidable manual SG 260 0.0999 -0.43 0.3
--.STV.Z. 1987-10-08T10:58:50.40 10.0 undecidable manual PG 260 0.0999 0.27 1.3
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