Earthquake with magnitude of Md 2.5 on date 11-02-1985 and time 11:47:26 (UTC) in region 6 km SE Entracque (CN)

A magnitude Md 2.5 earthquake occured in region: 6 km SE Entracque (CN), on

  • 11-02-1985 11:47:26 (UTC)
  • 11-02-1985 12:47:26 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.21, 7.46 at 14 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
Entracque CN 6 774 774
Roaschia CN 7 107 881
Vernante CN 7 1178 2059
Limone Piemonte CN 9 1485 3544
Valdieri CN 9 935 4479
Robilante CN 10 2306 6785
Roccavione CN 12 2761 9546
Borgo San Dalmazzo CN 14 12468 22014
Moiola CN 14 234 22248
Gaiola CN 15 582 22830
Roccasparvera CN 15 741 23571
Boves CN 15 9835 33406
Valloriate CN 16 109 33515
Rittana CN 17 109 33624
Vignolo CN 17 2600 36224
Demonte CN 18 2003 38227
Peveragno CN 18 5543 43770
Cervasca CN 20 5013 48783

Municipalities with at least 50000 inhabitants

An earthquake occurred to
22 Km SW of Cuneo (56081 inhabitants)
50 Km NW of Sanremo (54807 inhabitants)
82 Km W of Savona (61345 inhabitants)
90 Km S of Moncalieri (57294 inhabitants)
97 Km SW of Asti (76202 inhabitants)
98 Km S of Torino (890529 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 Md 2.5 1985-02-11
11:47:26
44.21 7.46 14 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 1509
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-02-11 11:47:26 ± 0.192
Latitude 44.21 ± 0.03
Longitude 7.46 ± 0.01
Depth (km) 14 ± 3 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 1509

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) 3168.9
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 135
Number of associated phases, regardless of their use for origin computation 13
Number of defining phases 13
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) 0.00089
Epicentral distance of station farthest from the epicenter (degree) 0.00979
Number of stations at which the event was observed 7
Number of stations from which data was used for origin computation 7
Magnitude information

Md:2.5

Field Value
Value 2.5
Uncertainty
Num. used stations 1
Type of magnitude Md
Reference to an origin 1509
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:06:37
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.LRG.Z. 1985-02-11T11:48:01.80 10.0 undecidable manual SN 226 0.0098 -0.64 0.3
--.FRF.Z. 1985-02-11T11:47:56.20 10.0 undecidable manual SG 222 0.0079 -0.53 0.4
--.LRG.Z. 1985-02-11T11:47:47.40 10.0 undecidable manual PN 226 0.0098 0.06 1.4
--.FIN.Z. 1985-02-11T11:47:45.50 10.0 undecidable manual SG 89 0.0048 -0.35 0.7
--.FRF.Z. 1985-02-11T11:47:44.60 10.0 undecidable manual PG 222 0.0079 0.56 0.9
--.IMP.Z. 1985-02-11T11:47:41.00 10.0 undecidable manual SG 133 0.0038 -1.37 0
--.CK1.Z. 1985-02-11T11:47:39.00 10.0 undecidable manual PG 69 0.0056 -0.34 1.6
--.FIN.Z. 1985-02-11T11:47:38.20 10.0 undecidable manual PG 89 0.0048 0.44 1.4
--.ROB.Z. 1985-02-11T11:47:38.60 10.0 undecidable manual SG 72 0.0028 -0.05 0.8
--.IMP.Z. 1985-02-11T11:47:36.50 10.0 undecidable manual PG 133 0.0038 0.75 0.7
--.ROB.Z. 1985-02-11T11:47:33.60 10.0 undecidable manual PG 72 0.0028 -0.01 2.1
--.STV.Z. 1985-02-11T11:47:32.50 10.0 undecidable manual SG 293 0.0009 -0.2 0.8
--.STV.Z. 1985-02-11T11:47:30.00 10.0 undecidable manual PG 293 0.0009 -0.17 2
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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