Earthquake with magnitude of Md 3.1 on date 05-05-1985 and time 19:55:30 (Italy) in region 6 km S Forni di Sotto (UD)

A magnitude Md 3.1 earthquake occured in region: 6 km S Forni di Sotto (UD), on

  • 05-05-1985 17:55:30 (UTC)
  • 05-05-1985 19:55:30 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 46.34, 12.65 at 5 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
Forni di Sotto UD 6 600 600
Forni di Sopra UD 11 993 1593
Tramonti di Sopra PN 11 321 1914
Tramonti di Sotto PN 13 387 2301
Claut PN 13 956 3257
Ampezzo UD 14 1006 4263
Sauris UD 15 416 4679
Socchieve UD 15 908 5587
Frisanco PN 15 622 6209
Andreis PN 16 259 6468
Cimolais PN 17 397 6865
Meduno PN 17 1574 8439
Preone UD 18 246 8685
Barcis PN 18 256 8941
Cavasso Nuovo PN 19 1525 10466
Fanna PN 19 1583 12049
Enemonzo UD 19 1319 13368
Maniago PN 19 11698 25066
Raveo UD 20 458 25524

Municipalities with at least 50000 inhabitants

An earthquake occurred to
43 Km N of Pordenone (51229 inhabitants)
55 Km NW of Udine (99169 inhabitants)
81 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
Rev 1000 Md 3.1 1985-05-05
17:55:30
46.34 12.65 5 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 5879
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-05-05 17:55:30 ± 0.244
Latitude 46.34 ± 0.02
Longitude 12.65 ± 0.02
Depth (km) 5 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 5879

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) 2481.4
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 118
Number of associated phases, regardless of their use for origin computation 14
Number of defining phases 14
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.6
Epicentral distance of station closest to the epicenter (degree) 0.00235
Epicentral distance of station farthest from the epicenter (degree) 0.03254
Number of stations at which the event was observed 10
Number of stations from which data was used for origin computation 10
Magnitude information

Md:3.1

Field Value
Value 3.1
Uncertainty
Num. used stations 4
Type of magnitude Md
Reference to an origin 5879
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:10:17
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.CK1.Z. 1985-05-05T17:56:28.50 10.0 undecidable manual PN 239 0.0325 1.16 0.3
--.VAI.Z. 1985-05-05T17:56:15.00 10.0 undecidable manual PN? 261 0.0245 -0.12 0.5
--.TRI.Z. 1985-05-05T17:56:07.00 10.0 undecidable manual SG 128 0.009 1.28 0.2
--.BG1.Z. 1985-05-05T17:56:06.30 10.0 undecidable manual PN? 255 0.019 -0.38 0.5
--.CEY.Z. 1985-05-05T17:55:57.40 10.0 undecidable manual PN 115 0.0123 0.93 0.9
--.LJU.Z. 1985-05-05T17:55:56.80 10.0 undecidable manual PN 102 0.012 0.87 1
--.CTI.Z. 1985-05-05T17:55:56.50 10.0 undecidable manual SG 247 0.0067 -1.3 0.2
--.RBL.Z. 1985-05-05T17:55:53.50 10.0 undecidable manual SG 80 0.0057 -0.71 0.5
--.TRI.Z. 1985-05-05T17:55:50.50 10.0 undecidable manual PG 128 0.009 -0.47 1.6
--.VOY.Z. 1985-05-05T17:55:48.60 10.0 undecidable manual PG 109 0.0082 -0.8 1.1
--.CTI.Z. 1985-05-05T17:55:46.00 10.0 undecidable manual PG 247 0.0067 -0.39 1.7
--.RBL.Z. 1985-05-05T17:55:43.20 10.0 undecidable manual PG 80 0.0057 -1.13 0.7
--.FO1.Z. 1985-05-05T17:55:41.50 10.0 undecidable manual SG 19 0.0023 0.23 0.7
--.FO1.Z. 1985-05-05T17:55:37.00 10.0 positive manual PG 19 0.0023 0.15 3.9
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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