Earthquake with magnitude of M 2.0 on date 04-02-1986 and time 23:24:37 (Italy) in region 3 km E Aisone (CN)

A magnitude M 2.0 earthquake occured in region: 3 km E Aisone (CN), on

  • 04-02-1986 22:24:37 (UTC)
  • 04-02-1986 23:24:37 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.33, 7.25 at 13 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.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Aisone CN 3 248 248
Demonte CN 4 2003 2251
Vinadio CN 7 644 2895
Castelmagno CN 10 66 2961
Valloriate CN 10 109 3070
Pradleves CN 11 250 3320
Monterosso Grana CN 11 505 3825
Moiola CN 11 234 4059
Rittana CN 12 109 4168
Gaiola CN 12 582 4750
Valdieri CN 13 935 5685
Valgrana CN 14 786 6471
Sambuco CN 14 92 6563
Entracque CN 15 774 7337
Roccasparvera CN 15 741 8078
Montemale di Cuneo CN 16 241 8319
Bernezzo CN 16 4104 12423
Cartignano CN 17 190 12613
Caraglio CN 17 6836 19449
Roaschia CN 17 107 19556
Pietraporzio CN 18 77 19633
Vignolo CN 18 2600 22233
Dronero CN 18 7035 29268
San Damiano Macra CN 18 430 29698
Roccabruna CN 18 1585 31283
Cervasca CN 18 5013 36296
Roccavione CN 18 2761 39057
Celle di Macra CN 18 100 39157
Borgo San Dalmazzo CN 19 12468 51625
Marmora CN 19 68 51693
Canosio CN 20 80 51773

Municipalities with at least 50000 inhabitants

An earthquake occurred to
25 Km W of Cuneo (56081 inhabitants)
70 Km NW of Sanremo (54807 inhabitants)
83 Km SW of Moncalieri (57294 inhabitants)
90 Km SW of Torino (890529 inhabitants)
98 Km W of Savona (61345 inhabitants)
99 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
Rev 1000 M 2.0 1986-02-04
22:24:37
44.33 7.25 13 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 22069
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1986-02-04 22:24:37 ± 0.265
Latitude 44.33 ± 0.02
Longitude 7.25 ± 0.03
Depth (km) 13 ± 3 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 22069

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) 2907.7
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 184
Number of associated phases, regardless of their use for origin computation 8
Number of defining phases 8
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) 0.00081
Epicentral distance of station farthest from the epicenter (degree) 0.00623
Number of stations at which the event was observed 4
Number of stations from which data was used for origin computation 4
Magnitude information

M:2

Field Value
Value 2
Uncertainty
Num. used stations
Type of magnitude M
Reference to an origin 22069
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2015-04-28 09:50:03
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.FIN.-. 1986-02-04T22:25:01.90 10.0 undecidable manual SG 99 0.0062 -0.08 0.7
--.IMP.-. 1986-02-04T22:24:59.00 10.0 undecidable manual SG 131 0.0055 -0.45 0.3
--.FIN.-. 1986-02-04T22:24:52.00 10.0 undecidable manual PG 99 0.0062 0.25 1.4
--.IMP.-. 1986-02-04T22:24:50.10 10.0 undecidable manual PG 131 0.0055 -0.19 1.7
--.SOO.-. 1986-02-04T22:24:46.00 10.0 undecidable manual SG 328 0.0019 -0.51 0.3
--.SOO.-. 1986-02-04T22:24:42.90 10.0 undecidable manual PG 328 0.0019 0.09 2.4
--.STV.-. 1986-02-04T22:24:42.80 10.0 undecidable manual SG 144 0.0008 -0.47 0.3
--.STV.-. 1986-02-04T22:24:41.40 10.0 undecidable manual PG 144 0.0008 0.45 0.9
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
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QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download