Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of M 2.3 on date 23-03-1986 and time 01:27:10 (UTC) in region 4 km W Valdieri (CN)

A magnitude M 2.3 earthquake occured in region: 4 km W Valdieri (CN), on

  • 23-03-1986 01:27:10 (UTC)
  • 23-03-1986 02:27:10 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.2920, 7.3500 at 19 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
Valdieri CN 4 935 935
Moiola CN 5 234 1169
Demonte CN 5 2003 3172
Valloriate CN 6 109 3281
Gaiola CN 7 582 3863
Entracque CN 7 774 4637
Rittana CN 8 109 4746
Roaschia CN 9 107 4853
Roccasparvera CN 9 741 5594
Aisone CN 11 248 5842
Roccavione CN 11 2761 8603
Borgo San Dalmazzo CN 12 12468 21071
Vignolo CN 12 2600 23671
Bernezzo CN 13 4104 27775
Robilante CN 13 2306 30081
Monterosso Grana CN 13 505 30586
Valgrana CN 13 786 31372
Cervasca CN 14 5013 36385
Vinadio CN 14 644 37029
Pradleves CN 15 250 37279
Caraglio CN 15 6836 44115
Vernante CN 16 1178 45293
Montemale di Cuneo CN 16 241 45534
Boves CN 17 9835 55369
Castelmagno CN 17 66 55435
Dronero CN 20 7035 62470
Cuneo CN 20 56081 118551

Municipalities with at least 50000 inhabitants

An earthquake occurred to
20 Km SW of Cuneo (56081 inhabitants)
63 Km NW of Sanremo (54807 inhabitants)
83 Km SW of Moncalieri (57294 inhabitants)
90 Km W of Savona (61345 inhabitants)
91 Km SW of Torino (890529 inhabitants)
96 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 		M 2.3 1986-03-23
01:27:10		 44.292 7.35 19 2013-07-15
08:40:51		 Bollettino Sismico Italiano INGV 24719
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1986-03-23 01:27:10 ± 0.283
Latitude 44.2920 ± 0.0159
Longitude 7.3500 ± 0.0181
Depth (km) 19 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 24719

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) 2282.1
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 120
Number of associated phases, regardless of their use for origin computation 15
Number of defining phases 15
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) 0.00032
Epicentral distance of station farthest from the epicenter (degree) 0.00664
Number of stations at which the event was observed 8
Number of stations from which data was used for origin computation 8
Magnitude information

M:2.3

Field Value
Value 2.3
Uncertainty
Num. used stations
Type of magnitude M
Reference to an origin 24719
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
--.RRL.Z. 1986-03-23T01:27:35.80 10.0 undecidable manual SG 327 0.7326 -0.87 0
--.CKI.Z. 1986-03-23T01:27:34.50 10.0 undecidable manual SG 78 0.6771 0.07 0.5
--.FIN.Z. 1986-03-23T01:27:32.00 10.0 undecidable manual SG 97 0.6105 -0.7 0.1
--.IMP.Z. 1986-03-23T01:27:29.40 10.0 undecidable manual SG 133 0.5439 -0.76 0.1
--.RRL.Z. 1986-03-23T01:27:25.80 10.0 undecidable manual PG 327 0.7326 0.12 1
--.ROB.Z. 1986-03-23T01:27:25.40 10.0 undecidable manual SG 88 0.3663 0.42 0.4
--.CKI.Z. 1986-03-23T01:27:24.00 10.0 undecidable manual PG 78 0.6771 -0.38 0.6
--.FIN.Z. 1986-03-23T01:27:23.20 10.0 undecidable manual PG 97 0.6105 -0.18 1.1
--.IMP.Z. 1986-03-23T01:27:22.00 10.0 undecidable manual PG 133 0.5439 0.08 2.5
--.SOO.Z. 1986-03-23T01:27:21.70 10.0 undecidable manual SG 320 0.2664 -0.35 0.3
--.ROB.Z. 1986-03-23T01:27:19.20 10.0 undecidable manual PG 88 0.3663 0.27 2.1
--.SOO.Z. 1986-03-23T01:27:17.50 10.0 undecidable manual PG 320 0.2664 0.26 1.1
--.STV.Z. 1986-03-23T01:27:16.20 10.0 undecidable manual SG 199 0.0333 -0.65 0.1
--.STV.Z. 1986-03-23T01:27:14.40 10.0 undecidable manual PG 199 0.0333 0.17 2.6
--.ENR.Z. 1986-03-23T01:27:14.70 10.0 undecidable manual PG 142 0.0777 0.19 2.5
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