Earthquake with magnitude of Md 2.3 on date 21-08-1985 and time 08:16:47 (UTC) in region 6 km E Venzone (UD)

A magnitude Md 2.3 earthquake occured in region: 6 km E Venzone (UD), on

  • 21-08-1985 08:16:47 (UTC)
  • 21-08-1985 10:16:47 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 46.32, 13.21 at 15 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
Venzone UD 6 2117 2117
Gemona del Friuli UD 7 10964 13081
Montenars UD 7 538 13619
Lusevera UD 7 643 14262
Bordano UD 8 754 15016
Resiutta UD 8 309 15325
Artegna UD 9 2885 18210
Resia UD 10 1033 19243
Magnano in Riviera UD 10 2336 21579
Moggio Udinese UD 10 1714 23293
Amaro UD 11 823 24116
Trasaghis UD 11 2227 26343
Tarcento UD 12 9012 35355
Osoppo UD 12 2936 38291
Chiusaforte UD 13 672 38963
Taipana UD 13 636 39599
Buja UD 14 6563 46162
Nimis UD 14 2740 48902
Cavazzo Carnico UD 14 1052 49954
Treppo Grande UD 15 1708 51662
Cassacco UD 16 2938 54600
Attimis UD 16 1805 56405
Dogna UD 17 175 56580
Tricesimo UD 17 7600 64180
Tolmezzo UD 18 10440 74620
Colloredo di Monte Albano UD 18 2223 76843
Majano UD 18 5945 82788
Verzegnis UD 18 863 83651
Reana del Rojale UD 19 4966 88617

Municipalities with at least 50000 inhabitants

An earthquake occurred to
29 Km N of Udine (99169 inhabitants)
59 Km NE of Pordenone (51229 inhabitants)
86 Km NW of Trieste (204420 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 2.3 1985-08-21
08:16:47
46.32 13.21 15 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 12179
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-08-21 08:16:47 ± 0.218
Latitude 46.32 ± 0.01
Longitude 13.21 ± 0.01
Depth (km) 15 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 12179

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) 1490.4
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 100
Number of associated phases, regardless of their use for origin computation 10
Number of defining phases 10
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) 0.00065
Epicentral distance of station farthest from the epicenter (degree) 0.00356
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:2.3

Field Value
Value 2.3
Uncertainty
Num. used stations 2
Type of magnitude Md
Reference to an origin 12179
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:15:27
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.FO1.Z. 1985-08-21T08:17:03.00 10.0 undecidable manual SG 313 0.0036 0.32 0.2
--.RBL.Z. 1985-08-21T08:16:59.00 10.0 undecidable manual SG 63 0.0024 0.33 0.3
--.FO1.Z. 1985-08-21T08:16:56.60 10.0 undecidable manual PG 313 0.0036 0.25 0.7
--.RBL.Z. 1985-08-21T08:16:54.00 10.0 undecidable manual PG 63 0.0024 -0.04 1.4
--.UDI.Z. 1985-08-21T08:16:53.60 10.0 undecidable manual PG 175 0.0023 -0.05 1.4
--.BAD.Z. 1985-08-21T08:16:53.10 10.0 undecidable manual SG 163 0.0007 -0.35 0.4
--.ZOU.Z. 1985-08-21T08:16:53.60 10.0 undecidable manual PG 325 0.0026 -0.66 0.1
--.BUA.Z. 1985-08-21T08:16:51.50 10.0 undecidable manual PG 210 0.001 0.09 1.4
--.BOO.Z. 1985-08-21T08:16:51.10 10.0 undecidable manual PG 271 0.0006 0.19 1.2
--.BAD.Z. 1985-08-21T08:16:51.10 10.0 positive manual PG 163 0.0007 0.07 2.9
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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