Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of Md 2.1 on date 12-02-1985 and time 23:04:24 (Italy) in region 3 km NW Bordano (UD)

A magnitude Md 2.1 earthquake occured in region: 3 km NW Bordano (UD), on

  • 12-02-1985 22:04:24 (UTC)
  • 12-02-1985 23:04:24 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 46.3400, 13.0970 at 12 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
Bordano UD 3 754 754
Venzone UD 3 2117 2871
Amaro UD 4 823 3694
Cavazzo Carnico UD 5 1052 4746
Trasaghis UD 7 2227 6973
Gemona del Friuli UD 8 10964 17937
Osoppo UD 10 2936 20873
Verzegnis UD 10 863 21736
Tolmezzo UD 10 10440 32176
Moggio Udinese UD 11 1714 33890
Montenars UD 11 538 34428
Resiutta UD 11 309 34737
Artegna UD 12 2885 37622
Magnano in Riviera UD 14 2336 39958
Zuglio UD 15 595 40553
Buja UD 15 6563 47116
Lusevera UD 15 643 47759
Lauco UD 16 729 48488
Villa Santina UD 16 2233 50721
Vito d'Asio PN 16 769 51490
Arta Terme UD 16 2171 53661
Forgaria nel Friuli UD 16 1786 55447
Resia UD 17 1033 56480
Tarcento UD 17 9012 65492
Treppo Grande UD 17 1708 67200
Majano UD 17 5945 73145
Chiusaforte UD 18 672 73817
Enemonzo UD 18 1319 75136
Clauzetto PN 19 380 75516
Preone UD 19 246 75762
Colloredo di Monte Albano UD 20 2223 77985
Cassacco UD 20 2938 80923

Municipalities with at least 50000 inhabitants

An earthquake occurred to
33 Km NW of Udine (99169 inhabitants)
54 Km NE of Pordenone (51229 inhabitants)
93 Km NW of Trieste (204420 inhabitants)
100 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 		Md 2.1
M 2.6 		1985-02-12
22:04:24		 46.34 13.097 12 2013-07-15
08:40:51		 Bollettino Sismico Italiano INGV 1599
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-02-12 22:04:24 ± 0.118
Latitude 46.3400 ± 0.0050
Longitude 13.0970 ± 0.0084
Depth (km) 12 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 1599

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) 851.6
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 94
Number of associated phases, regardless of their use for origin computation 19
Number of defining phases 19
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) 0.00016
Epicentral distance of station farthest from the epicenter (degree) 0.00316
Number of stations at which the event was observed 10
Number of stations from which data was used for origin computation 10
Magnitudes information

Md:2.1

Field Value
Value 2.1
Uncertainty
Num. used stations 1
Type of magnitude Md
Reference to an origin 1599
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:06:41

M:2.6

Field Value
Value 2.6
Uncertainty
Num. used stations
Type of magnitude M
Reference to an origin 1599
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(km) Takeoff_angle Residual Weight
--.RBL.Z. 1985-02-12T22:04:37.00 10.0 undecidable manual SG 72 0.333 -0.11 0.4
--.RCL.Z. 1985-02-12T22:04:37.90 10.0 undecidable manual SG 239 0.3552 0.25 0.3
--.FO1.Z. 1985-02-12T22:04:36.50 10.0 undecidable manual SG 319 0.333 -0.45 0.1
--.UDI.Z. 1985-02-12T22:04:35.00 10.0 undecidable manual SG 160 0.2886 -0.59 0
--.COL.Z. 1985-02-12T22:04:35.30 10.0 undecidable manual SG 136 0.2775 -0.06 0.5
--.ZOU.Z. 1985-02-12T22:04:33.60 10.0 undecidable manual SG 338 0.222 -0.11 0.8
--.RBL.Z. 1985-02-12T22:04:32.00 10.0 undecidable manual PG 72 0.333 0.3 0.5
--.RCL.Z. 1985-02-12T22:04:32.40 10.0 undecidable manual PG 239 0.3552 0.39 0.3
--.FO1.Z. 1985-02-12T22:04:31.00 10.0 undecidable manual PG 319 0.333 -0.6 0.1
--.BAD.Z. 1985-02-12T22:04:30.80 10.0 undecidable manual SG 135 0.1443 -0.22 0.6
--.COL.Z. 1985-02-12T22:04:30.70 10.0 undecidable manual PG 136 0.2775 0.02 1.3
--.BUA.Z. 1985-02-12T22:04:30.20 10.0 undecidable manual SG 171 0.1221 -0.2 0.6
--.MPR.Z. 1985-02-12T22:04:30.20 10.0 undecidable manual SG 217 0.1221 -0.23 0.6
--.UDI.Z. 1985-02-12T22:04:30.70 10.0 undecidable manual PG 160 0.2886 -0.12 1.1
--.ZOU.Z. 1985-02-12T22:04:29.90 10.0 negative manual PG 338 0.222 0.17 2.2
--.BAD.Z. 1985-02-12T22:04:28.20 10.0 negative manual PG 135 0.1443 0.03 2.9
--.MPR.Z. 1985-02-12T22:04:27.90 10.0 positive manual PG 217 0.1221 0.06 2.8
--.BUA.Z. 1985-02-12T22:04:27.90 10.0 undecidable manual PG 171 0.1221 0.08 1.4
--.BOO.Z. 1985-02-12T22:04:26.80 10.0 positive manual PG 174 0.0222 0.13 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