ISTITUTO NAZIONALE DI GEOFISICA E VULCANOLOGIA

Earthquake with magnitude of Md 2.5 on date 04-08-1985 and time 08:59:12 (Italy) in region 4 km S Forni di Sopra (UD)

A magnitude Md 2.5 earthquake occured in region: 4 km S Forni di Sopra (UD), on

  • 04-08-1985 06:59:12 (UTC)
  • 04-08-1985 08:59:12 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 46.39, 12.59 at 10 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 Sopra UD 4 993 993
Forni di Sotto UD 6 600 1593
Sauris UD 13 416 2009
Claut PN 14 956 2965
Lorenzago di Cadore BL 15 549 3514
Vigo di Cadore BL 16 1440 4954
Lozzo di Cadore BL 16 1383 6337
Ampezzo UD 16 1006 7343
Domegge di Cadore BL 16 2441 9784
Cimolais PN 16 397 10181
Tramonti di Sopra PN 17 321 10502
Pieve di Cadore BL 17 3794 14296
Calalzo di Cadore BL 18 2085 16381
Socchieve UD 18 908 17289
Perarolo di Cadore BL 18 380 17669
Tramonti di Sotto PN 19 387 18056
Santo Stefano di Cadore BL 20 2609 20665

Municipalities with at least 50000 inhabitants

An earthquake occurred to
48 Km N of Pordenone (51229 inhabitants)
61 Km NW of Udine (99169 inhabitants)
84 Km NE of Treviso (83731 inhabitants)
96 Km E of Bolzano (106441 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 1985-08-04
06:59:12
46.39 12.59 10 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 11289
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-08-04 06:59:12 ± 0.406
Latitude 46.39 ± 0.03
Longitude 12.59 ± 0.02
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 11289

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) 3231.6
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 201
Number of associated phases, regardless of their use for origin computation 15
Number of defining phases 15
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.5
Epicentral distance of station closest to the epicenter (degree) 0.00162
Epicentral distance of station farthest from the epicenter (degree) 0.00947
Number of stations at which the event was observed 8
Number of stations from which data was used for origin computation 8
Magnitude information

Md:2.5

Field Value
Value 2.5
Uncertainty
Num. used stations 2
Type of magnitude Md
Reference to an origin 11289
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:14:44
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.CTI.Z. 1985-08-04T06:59:40.00 10.0 undecidable manual SG 242 0.0066 1.54 0
--.RBL.Z. 1985-08-04T06:59:37.50 10.0 undecidable manual SG 84 0.006 1 0.2
--.TRI.Z. 1985-08-04T06:59:35.00 10.0 undecidable manual PN 129 0.0095 1.47 0.1
--.BAD.Z. 1985-08-04T06:59:29.80 10.0 undecidable manual SG 107 0.0042 -0.26 0.6
--.BUA.Z. 1985-08-04T06:59:28.60 10.0 undecidable manual SG 114 0.0036 0.8 0.3
--.CTI.Z. 1985-08-04T06:59:28.50 10.0 undecidable manual PG 242 0.0066 0.81 0.6
--.RBL.Z. 1985-08-04T06:59:26.00 10.0 undecidable manual PG 84 0.006 -0.56 1
--.MPR.Z. 1985-08-04T06:59:25.00 10.0 undecidable manual SG 117 0.0028 0.22 0.9
--.RCL.Z. 1985-08-04T06:59:22.30 10.0 undecidable manual SG 169 0.002 0.05 1
--.BAD.Z. 1985-08-04T06:59:22.50 10.0 undecidable manual PG 107 0.0042 -0.34 1.4
--.BUA.Z. 1985-08-04T06:59:21.10 10.0 undecidable manual PG 114 0.0036 -0.43 1.3
--.ERT.Z. 1985-08-04T06:59:20.50 10.0 undecidable manual SG 233 0.0016 -0.33 0.9
--.MPR.Z. 1985-08-04T06:59:19.40 10.0 undecidable manual PG 117 0.0028 -0.39 1.4
--.RCL.Z. 1985-08-04T06:59:18.00 10.0 negative manual PG 169 0.002 -0.33 2.9
--.ERT.Z. 1985-08-04T06:59:16.90 10.0 negative manual PG 233 0.0016 -0.61 2.2
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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