Earthquake with magnitude of Md 3.3 on date 11-01-1985 and time 20:30:36 (UTC) in region 2 km SW Aidone (EN)

A magnitude Md 3.3 earthquake occured in region: 2 km SW Aidone (EN), on

  • 11-01-1985 20:30:36 (UTC)
  • 11-01-1985 21:30:36 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 37.4, 14.44 at 5 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
Aidone EN 2 4889 4889
Piazza Armerina EN 7 21886 26775
Mirabella Imbaccari CT 9 4912 31687
Raddusa CT 11 3178 34865
Valguarnera Caropepe EN 12 7866 42731
San Michele di Ganzaria CT 14 3245 45976
San Cono CT 14 2697 48673
Caltagirone CT 19 38686 87359

Municipalities with at least 50000 inhabitants

An earthquake occurred to
35 Km E of Caltanissetta (63360 inhabitants)
41 Km NE of Gela (75827 inhabitants)
51 Km N of Vittoria (63339 inhabitants)
58 Km W of Catania (314555 inhabitants)
59 Km NW of Ragusa (73313 inhabitants)
67 Km NW of Modica (54633 inhabitants)
68 Km W of Acireale (52622 inhabitants)
77 Km E of Agrigento (59770 inhabitants)
84 Km W of Siracusa (122291 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 Md 3.3
ML-VAX 3.0
1985-01-11
20:30:36
37.4 14.44 5 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 399
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-01-11 20:30:36 ± 0.129
Latitude 37.40 ± 0.01
Longitude 14.44 ± 0.01
Depth (km) 5 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 399

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) 1501.6
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 199
Number of associated phases, regardless of their use for origin computation 6
Number of defining phases 6
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) 0.00478
Epicentral distance of station farthest from the epicenter (degree) 0.02898
Number of stations at which the event was observed 4
Number of stations from which data was used for origin computation 4
Magnitudes information

Md:3.3

Field Value
Value 3.3
Uncertainty
Num. used stations 2
Type of magnitude Md
Reference to an origin 399
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:05:40

ML:3

Field Value
Value 3
Uncertainty
Num. used stations 3
Type of magnitude ML
Reference to an origin 399
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2015-04-28 13:07:13
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.SGO.Z. 1985-01-11T20:31:28.00 10.0 undecidable manual PN 12 0.029 0.36 0.1
--.MSI.Z. 1985-01-11T20:31:16.50 10.0 undecidable manual SN 47 0.0107 -0.12 0.4
--.MSI.Z. 1985-01-11T20:30:59.50 10.0 undecidable manual PN 47 0.0107 -0.17 0.9
--.PZI.Z. 1985-01-11T20:30:56.50 10.0 undecidable manual SG 131 0.0048 0.06 0.8
--.GIB.Z. 1985-01-11T20:30:50.50 10.0 undecidable manual PG 331 0.006 -0.14 1
--.PZI.Z. 1985-01-11T20:30:48.00 10.0 positive manual PG 131 0.0048 -0.02 2.8
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
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