Earthquake with magnitude of M 2.4 on date 18-04-1985 and time 19:49:13 (Italy) in region 4 km E Amaro (UD)

A magnitude M 2.4 earthquake occured in region: 4 km E Amaro (UD), on

  • 18-04-1985 17:49:13 (UTC)
  • 18-04-1985 19:49:13 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 46.38, 13.15 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
Amaro UD 4 823 823
Venzone UD 5 2117 2940
Moggio Udinese UD 6 1714 4654
Resiutta UD 6 309 4963
Bordano UD 7 754 5717
Cavazzo Carnico UD 8 1052 6769
Tolmezzo UD 11 10440 17209
Gemona del Friuli UD 11 10964 28173
Trasaghis UD 12 2227 30400
Verzegnis UD 12 863 31263
Resia UD 12 1033 32296
Chiusaforte UD 13 672 32968
Zuglio UD 13 595 33563
Montenars UD 13 538 34101
Osoppo UD 14 2936 37037
Arta Terme UD 14 2171 39208
Artegna UD 15 2885 42093
Lusevera UD 15 643 42736
Dogna UD 15 175 42911
Magnano in Riviera UD 16 2336 45247
Lauco UD 17 729 45976
Paularo UD 18 2623 48599
Villa Santina UD 18 2233 50832
Buja UD 18 6563 57395
Tarcento UD 19 9012 66407
Pontebba UD 19 1433 67840
Ligosullo UD 19 116 67956
Treppo Carnico UD 19 618 68574
Sutrio UD 20 1332 69906
Paluzza UD 20 2217 72123

Municipalities with at least 50000 inhabitants

An earthquake occurred to
35 Km N of Udine (99169 inhabitants)
60 Km NE of Pordenone (51229 inhabitants)
94 Km NW of Trieste (204420 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 2.4 1985-04-18
17:49:13
46.38 13.15 8 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 4909
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-04-18 17:49:13 ± 0.318
Latitude 46.38 ± 0.02
Longitude 13.15 ± 0.01
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 4909

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) 2133.8
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 242
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) 0.1
Epicentral distance of station closest to the epicenter (degree) 0.00057
Epicentral distance of station farthest from the epicenter (degree) 0.00356
Number of stations at which the event was observed 7
Number of stations from which data was used for origin computation 7
Magnitude information

M:2.4

Field Value
Value 2.4
Uncertainty
Num. used stations
Type of magnitude M
Reference to an origin 4909
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
--.DRE.Z. 1985-04-18T17:49:28.50 10.0 undecidable manual SG 120 0.0036 0.32 0.1
--.RCL.Z. 1985-04-18T17:49:28.50 10.0 undecidable manual SG 237 0.0036 0.15 0.4
--.COL.Z. 1985-04-18T17:49:24.50 10.0 undecidable manual SG 146 0.0026 0.02 0.6
--.RCL.Z. 1985-04-18T17:49:21.80 10.0 undecidable manual PG 237 0.0036 -0.08 1.2
--.DRE.Z. 1985-04-18T17:49:20.90 10.0 undecidable manual PG 120 0.0036 -0.88 0.1
--.MPR.Z. 1985-04-18T17:49:19.90 10.0 undecidable manual SG 219 0.0015 -0.27 0.2
--.COL.Z. 1985-04-18T17:49:19.60 10.0 undecidable manual PG 146 0.0026 -0.04 1.5
--.BUA.Z. 1985-04-18T17:49:19.40 10.0 undecidable manual SG 185 0.0014 -0.23 0.3
--.MPR.Z. 1985-04-18T17:49:17.20 10.0 negative manual PG 219 0.0015 0.05 1.5
--.BUA.Z. 1985-04-18T17:49:16.90 10.0 undecidable manual PG 185 0.0014 0.06 1.5
--.BAD.Z. 1985-04-18T17:49:16.80 10.0 positive manual PG 154 0.0014 0.04 1.4
--.BOO.Z. 1985-04-18T17:49:15.10 10.0 negative manual PG 210 0.0006 0 3.1
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
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