ISTITUTO NAZIONALE DI GEOFISICA E VULCANOLOGIA

Earthquake with magnitude of M 2.6 on date 16-02-1985 and time 12:34:42 (Italy) in region 7 km E Paularo (UD)

A magnitude M 2.6 earthquake occured in region: 7 km E Paularo (UD), on

  • 16-02-1985 11:34:42 (UTC)
  • 16-02-1985 12:34:42 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 46.52, 13.21 at 8 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
Paularo UD 7 2623 2623
Pontebba UD 7 1433 4056
Ligosullo UD 11 116 4172
Dogna UD 11 175 4347
Moggio Udinese UD 12 1714 6061
Treppo Carnico UD 13 618 6679
Resiutta UD 14 309 6988
Chiusaforte UD 15 672 7660
Paluzza UD 15 2217 9877
Arta Terme UD 15 2171 12048
Zuglio UD 15 595 12643
Sutrio UD 17 1332 13975
Cercivento UD 17 679 14654
Malborghetto Valbruna UD 18 951 15605
Resia UD 18 1033 16638
Amaro UD 19 823 17461
Tolmezzo UD 20 10440 27901

Municipalities with at least 50000 inhabitants

An earthquake occurred to
51 Km N of Udine (99169 inhabitants)
76 Km NE 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 2.6 1985-02-16
11:34:42
46.52 13.21 8 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 1839
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-02-16 11:34:42 ± 0.268
Latitude 46.52 ± 0.01
Longitude 13.21 ± 0.02
Depth (km) 8 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 1839

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) 1966.5
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 215
Number of associated phases, regardless of their use for origin computation 12
Number of defining phases 12
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) 0.00146
Epicentral distance of station farthest from the epicenter (degree) 0.00405
Number of stations at which the event was observed 6
Number of stations from which data was used for origin computation 6
Magnitude information

M:2.6

Field Value
Value 2.6
Uncertainty
Num. used stations
Type of magnitude M
Reference to an origin 1839
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2015-04-28 09:50:03
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.DRE.Z. 1985-02-16T11:34:59.20 10.0 undecidable manual SG 139 0.004 0.18 0.4
--.COL.Z. 1985-02-16T11:34:58.00 10.0 undecidable manual SG 163 0.0036 0.7 0
--.MPR.Z. 1985-02-16T11:34:54.90 10.0 undecidable manual SG 208 0.0028 0.36 0.3
--.FO1.Z. 1985-02-16T11:34:53.50 10.0 undecidable manual SG 283 0.0027 -0.57 0.2
--.COL.Z. 1985-02-16T11:34:51.00 10.0 undecidable manual PG 163 0.0036 0.13 1.3
--.DRE.Z. 1985-02-16T11:34:51.40 10.0 undecidable manual PG 139 0.004 -0.46 0.4
--.BOO.Z. 1985-02-16T11:34:50.50 10.0 undecidable manual SG 200 0.0019 -0.36 0.5
--.MPR.Z. 1985-02-16T11:34:49.40 10.0 undecidable manual PG 208 0.0028 0.13 1.5
--.FO1.Z. 1985-02-16T11:34:49.00 10.0 negative manual PG 283 0.0027 0 3.2
--.ZOU.Z. 1985-02-16T11:34:49.20 10.0 undecidable manual SG 282 0.0015 0.07 0.9
--.ZOU.Z. 1985-02-16T11:34:46.40 10.0 negative manual PG 282 0.0015 0.25 2.3
--.BOO.Z. 1985-02-16T11:34:46.90 10.0 undecidable manual PG 200 0.0019 -0.25 1.1
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
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