Earthquake with magnitude of M 2.5 on date 15-02-1985 and time 12:40:20 (Italy) in region Confine Italia Slovenia (SLOVENIA)

A magnitude M 2.5 earthquake occured in region: Confine Italia Slovenia (SLOVENIA), on

  • 15-02-1985 11:40:20 (UTC)
  • 15-02-1985 12:40:20 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 46.03, 13.69 at 4 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
San Floriano del Collio GO 10 796 796
Gorizia GO 11 34844 35640
Stregna UD 14 356 35996
Mossa GO 15 1584 37580
Grimacco UD 16 342 37922
Dolegna del Collio GO 16 370 38292
San Lorenzo Isontino GO 17 1564 39856
Capriva del Friuli GO 17 1713 41569
Prepotto UD 17 769 42338
Savogna d'Isonzo GO 17 1717 44055
San Leonardo UD 17 1129 45184
Drenchia UD 17 115 45299
Cormons GO 18 7414 52713
Moraro GO 19 768 53481
Farra d'Isonzo GO 19 1733 55214
Savogna UD 19 411 55625
San Pietro al Natisone UD 20 2171 57796
Corno di Rosazzo UD 20 3219 61015

Municipalities with at least 50000 inhabitants

An earthquake occurred to
36 Km E of Udine (99169 inhabitants)
42 Km N of Trieste (204420 inhabitants)
80 Km E of Pordenone (51229 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 M 2.5 1985-02-15
11:40:20
46.03 13.69 4 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 1769
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-02-15 11:40:20 ± 0.398
Latitude 46.03 ± 0.02
Longitude 13.69 ± 0.02
Depth (km) 4 ± 3 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 1769

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) 2407.2
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 307
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) 0.1
Epicentral distance of station closest to the epicenter (degree) 0.0013
Epicentral distance of station farthest from the epicenter (degree) 0.00478
Number of stations at which the event was observed 4
Number of stations from which data was used for origin computation 4
Magnitude information

M:2.5

Field Value
Value 2.5
Uncertainty
Num. used stations
Type of magnitude M
Reference to an origin 1769
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2015-04-28 09:39:34
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.MPR.Z. 1985-02-15T11:40:40.90 10.0 undecidable manual SG 293 0.0048 0.46 0
--.BAD.Z. 1985-02-15T11:40:34.50 10.0 undecidable manual SG 303 0.0033 -0.24 0.3
--.MPR.Z. 1985-02-15T11:40:31.60 10.0 undecidable manual PG 293 0.0048 -0.29 0.4
--.COL.Z. 1985-02-15T11:40:29.90 10.0 undecidable manual SG 295 0.0021 0.23 0.3
--.BAD.Z. 1985-02-15T11:40:28.50 10.0 undecidable manual PG 303 0.0033 -0.1 1.3
--.COL.Z. 1985-02-15T11:40:25.70 10.0 negative manual PG 295 0.0021 0.03 3
--.DRE.Z. 1985-02-15T11:40:25.90 10.0 undecidable manual SG 346 0.0013 -0.25 0.4
--.DRE.Z. 1985-02-15T11:40:23.80 10.0 positive manual PG 346 0.0013 0.16 2.2
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
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