Earthquake with magnitude of M 2.4 on date 26-02-1985 and time 11:59:42 (UTC) in region 1 km NW Duino Aurisina (TS)

A magnitude M 2.4 earthquake occured in region: 1 km NW Duino Aurisina (TS), on

  • 26-02-1985 11:59:42 (UTC)
  • 26-02-1985 12:59:42 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 45.76, 13.66 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
Duino-Aurisina TS 1 8561 8561
Sgonico TS 8 2062 10623
Monfalcone GO 11 28258 38881
Monrupino TS 12 893 39774
Doberdò del Lago GO 13 1404 41178
Staranzano GO 13 7183 48361
Ronchi dei Legionari GO 14 11963 60324
Trieste TS 15 204420 264744
Savogna d'Isonzo GO 17 1717 266461
San Canzian d'Isonzo GO 17 6195 272656
Turriaco GO 17 2826 275482
San Pier d'Isonzo GO 18 2029 277511
Fogliano Redipuglia GO 18 3054 280565
Gradisca d'Isonzo GO 18 6497 287062
Sagrado GO 18 2193 289255
Fiumicello UD 19 4971 294226
Farra d'Isonzo GO 19 1733 295959
Muggia TS 20 13137 309096
Villesse GO 20 1720 310816
Gorizia GO 20 34844 345660

Municipalities with at least 50000 inhabitants

An earthquake occurred to
15 Km NW of Trieste (204420 inhabitants)
47 Km SE of Udine (99169 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 2.4 1985-02-26
11:59:42
45.76 13.66 10 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 2579
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-02-26 11:59:42 ± 0.7
Latitude 45.76 ± 0.04
Longitude 13.66 ± 0.04
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 2579

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) 5602.9
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 190
Number of associated phases, regardless of their use for origin computation 13
Number of defining phases 13
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 1.1
Epicentral distance of station closest to the epicenter (degree) 0.00081
Epicentral distance of station farthest from the epicenter (degree) 0.00607
Number of stations at which the event was observed 8
Number of stations from which data was used for origin computation 8
Magnitude information

M:2.4

Field Value
Value 2.4
Uncertainty
Num. used stations
Type of magnitude M
Reference to an origin 2579
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
--.MPR.Z. 1985-02-26T12:00:06.50 10.0 undecidable manual SG 316 0.0059 0.87 0.5
--.BOO.Z. 1985-02-26T12:00:04.40 10.0 undecidable manual SG 325 0.0061 -1.59 0.3
--.BUA.Z. 1985-02-26T12:00:02.40 10.0 undecidable manual SG 321 0.0053 -0.68 0.5
--.BAD.Z. 1985-02-26T11:59:59.90 10.0 undecidable manual SG 329 0.0049 -2.11 0.2
--.MPR.Z. 1985-02-26T11:59:57.00 10.0 undecidable manual PG 316 0.0059 1.2 0.9
--.BOO.Z. 1985-02-26T11:59:56.60 10.0 undecidable manual PG 325 0.0061 0.59 1.3
--.BUA.Z. 1985-02-26T11:59:55.50 10.0 undecidable manual PG 321 0.0053 1.17 1
--.VOY.Z. 1985-02-26T11:59:54.40 10.0 undecidable manual SG 31 0.0028 0.01 1
--.BAD.Z. 1985-02-26T11:59:54.00 10.0 undecidable manual PG 329 0.0049 0.29 1.6
--.COL.Z. 1985-02-26T11:59:51.10 10.0 undecidable manual PG 332 0.0037 -0.09 1.7
--.VOY.Z. 1985-02-26T11:59:50.80 10.0 positive manual PG 31 0.0028 1.49 1.7
--.DRE.Z. 1985-02-26T11:59:49.30 10.0 positive manual PG 358 0.0036 -1.76 1.3
--.TRI.Z. 1985-02-26T11:59:44.00 10.0 undecidable manual PG 125 0.0008 -1.27 1
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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