Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of M 2.3 on date 11-02-1985 and time 04:06:07 (UTC) in region 4 km SE Preone (UD)

A magnitude M 2.3 earthquake occured in region: 4 km SE Preone (UD), on

  • 11-02-1985 04:06:07 (UTC)
  • 11-02-1985 05:06:07 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 46.3730, 12.9070 at 9 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
Preone UD 4 246 246
Enemonzo UD 5 1319 1565
Villa Santina UD 5 2233 3798
Lauco UD 6 729 4527
Verzegnis UD 7 863 5390
Socchieve UD 7 908 6298
Raveo UD 8 458 6756
Tolmezzo UD 9 10440 17196
Ampezzo UD 10 1006 18202
Cavazzo Carnico UD 10 1052 19254
Tramonti di Sopra PN 11 321 19575
Ovaro UD 13 1922 21497
Tramonti di Sotto PN 13 387 21884
Zuglio UD 14 595 22479
Arta Terme UD 14 2171 24650
Amaro UD 15 823 25473
Clauzetto PN 16 380 25853
Vito d'Asio PN 16 769 26622
Comeglians UD 16 516 27138
Trasaghis UD 16 2227 29365
Bordano UD 17 754 30119
Sutrio UD 17 1332 31451
Forgaria nel Friuli UD 17 1786 33237
Ravascletto UD 17 536 33773
Forni di Sotto UD 18 600 34373
Cercivento UD 18 679 35052
Prato Carnico UD 18 904 35956
Venzone UD 18 2117 38073
Sauris UD 19 416 38489
Osoppo UD 19 2936 41425
Castelnovo del Friuli PN 19 880 42305
Paluzza UD 19 2217 44522
Meduno PN 20 1574 46096
Travesio PN 20 1776 47872

Municipalities with at least 50000 inhabitants

An earthquake occurred to
43 Km NW of Udine (99169 inhabitants)
50 Km NE of Pordenone (51229 inhabitants)
94 Km NE of Treviso (83731 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 1985-02-11
04:06:07		 46.373 12.907 9 2013-07-15
08:40:51		 Bollettino Sismico Italiano INGV 1479
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-02-11 04:06:07 ± 0.082
Latitude 46.3730 ± 0.0045
Longitude 12.9070 ± 0.0081
Depth (km) 9 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 1479

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) 799.1
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 116
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) 0.1
Epicentral distance of station closest to the epicenter (degree) 0.00121
Epicentral distance of station farthest from the epicenter (degree) 0.00437
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 9
Magnitude information

M:2.3

Field Value
Value 2.3
Uncertainty
Num. used stations
Type of magnitude M
Reference to an origin 1479
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2015-04-28 09:39:34
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
--.CAE.Z. 1985-02-11T04:06:25.90 10.0 undecidable manual SG 221 0.4884 0.42 0
--.COL.Z. 1985-02-11T04:06:23.30 10.0 undecidable manual SG 126 0.3996 0.55 0
--.BAD.Z. 1985-02-11T04:06:18.20 10.0 undecidable manual SG 120 0.2553 -0.21 0.4
--.RCL.Z. 1985-02-11T04:06:18.70 10.0 undecidable manual SG 219 0.2664 0.09 0.7
--.FO1.Z. 1985-02-11T04:06:17.50 10.0 undecidable manual SG 338 0.2331 0.21 0.3
--.CAE.Z. 1985-02-11T04:06:17.70 10.0 undecidable manual PG 221 0.4884 -0.24 0.4
--.BUA.Z. 1985-02-11T04:06:17.10 10.0 undecidable manual SG 135 0.2109 0.62 0
--.COL.Z. 1985-02-11T04:06:16.40 10.0 positive manual PG 126 0.3996 0.04 2.1
--.ZOU.Z. 1985-02-11T04:06:15.70 10.0 undecidable manual SG 14 0.1887 0.14 0.6
--.RCL.Z. 1985-02-11T04:06:14.00 10.0 undecidable manual PG 219 0.2664 0.03 1.3
--.MPR.Z. 1985-02-11T04:06:13.70 10.0 undecidable manual SG 156 0.1332 -0.24 0.4
--.BOO.Z. 1985-02-11T04:06:13.70 10.0 undecidable manual SG 111 0.1332 -0.27 0.3
--.FO1.Z. 1985-02-11T04:06:13.00 10.0 undecidable manual PG 338 0.2331 -0.21 0.7
--.BAD.Z. 1985-02-11T04:06:13.70 10.0 undecidable manual PG 120 0.2553 -0.16 1.9
--.BUA.Z. 1985-02-11T04:06:12.70 10.0 negative manual PG 135 0.2109 -0.04 2.6
--.ZOU.Z. 1985-02-11T04:06:12.30 10.0 undecidable manual PG 14 0.1887 0.08 1.2
--.MPR.Z. 1985-02-11T04:06:11.30 10.0 negative manual PG 156 0.1332 0.02 2.7
--.BOO.Z. 1985-02-11T04:06:11.40 10.0 negative manual PG 111 0.1332 0.1 2.3
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