Earthquake with magnitude of M 3.0 on date 30-06-1986 and time 18:35:21 (Italy) in region 8 km E Grado (GO)

A magnitude M 3.0 earthquake occured in region: 8 km E Grado (GO), on

  • 30-06-1986 16:35:21 (UTC)
  • 30-06-1986 18:35:21 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 45.71, 13.48 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
Grado GO 8 8251 8251
Fiumicello UD 11 4971 13222
Staranzano GO 11 7183 20405
Aquileia UD 11 3359 23764
San Canzian d'Isonzo GO 12 6195 29959
Monfalcone GO 12 28258 58217
Turriaco GO 13 2826 61043
Ronchi dei Legionari GO 13 11963 73006
Villa Vicentina UD 14 1384 74390
Duino-Aurisina TS 15 8561 82951
Terzo d'Aquileia UD 15 2866 85817
San Pier d'Isonzo GO 16 2029 87846
Ruda UD 16 2935 90781
Doberdò del Lago GO 16 1404 92185
Cervignano del Friuli UD 17 13844 106029
Villesse GO 17 1720 107749
Fogliano Redipuglia GO 18 3054 110803
Campolongo Tapogliano UD 19 1167 111970
Sagrado GO 19 2193 114163

Municipalities with at least 50000 inhabitants

An earthquake occurred to
23 Km W of Trieste (204420 inhabitants)
44 Km SE of Udine (99169 inhabitants)
70 Km E of Pordenone (51229 inhabitants)
94 Km E of Venezia (263352 inhabitants)
96 Km E 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 M 3.0 1986-06-30
16:35:21
45.71 13.48 4 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 30469
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1986-06-30 16:35:21 ± 0.546
Latitude 45.71 ± 0.03
Longitude 13.48 ± 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 30469

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) 3513.8
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 196
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) 0.3
Epicentral distance of station closest to the epicenter (degree) 0.0017
Epicentral distance of station farthest from the epicenter (degree) 0.01182
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:3

Field Value
Value 3
Uncertainty
Num. used stations
Type of magnitude M
Reference to an origin 30469
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
--.CTI.Z. 1986-06-30T16:35:46.00 10.0 undecidable manual PN 285 0.0118 -0.18 1
--.CEY.Z. 1986-06-30T16:35:45.90 10.0 undecidable manual SG 87 0.0059 0.64 0.1
--.FO1.Z. 1986-06-30T16:35:42.00 10.0 undecidable manual PG 331 0.0091 0.42 0.7
--.LJU.Z. 1986-06-30T16:35:37.70 10.0 undecidable manual PG 64 0.0072 0.03 1.4
--.RBL.Z. 1986-06-30T16:35:36.50 10.0 undecidable manual PG 4 0.0066 0.02 1.4
--.CEY.Z. 1986-06-30T16:35:34.20 10.0 undecidable manual PG 87 0.0059 -0.85 0.2
--.VOY.Z. 1986-06-30T16:35:30.60 10.0 negative manual PG 41 0.0039 -0.13 2.5
--.TRI.Z. 1986-06-30T16:35:26.00 10.0 undecidable manual PG 89 0.0017 0.47 0.6
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
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