Earthquake with magnitude of Md 2.8 on date 18-01-1985 and time 12:04:30 (Italy) in region 4 km SW Preone (UD)

A magnitude Md 2.8 earthquake occured in region: 4 km SW Preone (UD), on

  • 18-01-1985 11:04:30 (UTC)
  • 18-01-1985 12:04:30 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 46.36, 12.85 at 0 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
Preone UD 4 246 246
Socchieve UD 5 908 1154
Enemonzo UD 6 1319 2473
Tramonti di Sopra PN 7 321 2794
Ampezzo UD 8 1006 3800
Raveo UD 9 458 4258
Villa Santina UD 9 2233 6491
Tramonti di Sotto PN 9 387 6878
Lauco UD 10 729 7607
Verzegnis UD 12 863 8470
Tolmezzo UD 14 10440 18910
Ovaro UD 14 1922 20832
Forni di Sotto UD 14 600 21432
Cavazzo Carnico UD 15 1052 22484
Clauzetto PN 15 380 22864
Sauris UD 16 416 23280
Vito d'Asio PN 16 769 24049
Meduno PN 17 1574 25623
Comeglians UD 17 516 26139
Forgaria nel Friuli UD 18 1786 27925
Zuglio UD 18 595 28520
Travesio PN 18 1776 30296
Castelnovo del Friuli PN 18 880 31176
Prato Carnico UD 18 904 32080
Arta Terme UD 19 2171 34251
Frisanco PN 19 622 34873
Amaro UD 19 823 35696
Cavasso Nuovo PN 19 1525 37221
Ravascletto UD 19 536 37757
Trasaghis UD 19 2227 39984

Municipalities with at least 50000 inhabitants

An earthquake occurred to
44 Km NW of Udine (99169 inhabitants)
47 Km NE of Pordenone (51229 inhabitants)
90 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 2.8 1985-01-18
11:04:30
46.36 12.85 0 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 609
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-01-18 11:04:30 ± 0.722
Latitude 46.36 ± 0.03
Longitude 12.85 ± 0.03
Depth (km) 0 ± 8 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 609

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) 4570.1
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 110
Number of associated phases, regardless of their use for origin computation 8
Number of defining phases 8
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) 0.0021
Epicentral distance of station farthest from the epicenter (degree) 0.01595
Number of stations at which the event was observed 4
Number of stations from which data was used for origin computation 4
Magnitude information

Md:2.8

Field Value
Value 2.8
Uncertainty
Num. used stations 2
Type of magnitude Md
Reference to an origin 609
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:05:51
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.SAL.Z. 1985-01-18T11:05:25.50 10.0 undecidable manual SN 245 0.0159 -0.46 0.1
--.TRI.Z. 1985-01-18T11:05:04.50 10.0 undecidable manual SG 135 0.0082 1.03 0
--.SAL.Z. 1985-01-18T11:05:02.50 10.0 undecidable manual PN 245 0.0159 0 0.8
--.RBL.Z. 1985-01-18T11:04:50.00 10.0 undecidable manual SG 80 0.0045 0.21 0.6
--.TRI.Z. 1985-01-18T11:04:49.30 10.0 undecidable manual PG 135 0.0082 -0.21 2
--.RBL.Z. 1985-01-18T11:04:41.30 10.0 positive manual PG 80 0.0045 -0.31 1.6
--.FO1.Z. 1985-01-18T11:04:40.00 10.0 undecidable manual SG 348 0.0021 0.38 0.4
--.FO1.Z. 1985-01-18T11:04:35.80 10.0 undecidable manual PG 348 0.0021 0.05 2.4
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
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