Earthquake with magnitude of Md 2.8 on date 24-02-1985 and time 08:20:55 (UTC) in region 5 km S Aidone (EN)

A magnitude Md 2.8 earthquake occured in region: 5 km S Aidone (EN), on

  • 24-02-1985 08:20:55 (UTC)
  • 24-02-1985 09:20:55 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 37.37, 14.46 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
Aidone EN 5 4889 4889
Mirabella Imbaccari CT 6 4912 9801
Piazza Armerina EN 8 21886 31687
San Michele di Ganzaria CT 11 3245 34932
San Cono CT 12 2697 37629
Raddusa CT 13 3178 40807
Valguarnera Caropepe EN 15 7866 48673
Caltagirone CT 16 38686 87359

Municipalities with at least 50000 inhabitants

An earthquake occurred to
38 Km E of Caltanissetta (63360 inhabitants)
39 Km NE of Gela (75827 inhabitants)
48 Km N of Vittoria (63339 inhabitants)
55 Km NW of Ragusa (73313 inhabitants)
57 Km W of Catania (314555 inhabitants)
63 Km NW of Modica (54633 inhabitants)
68 Km W of Acireale (52622 inhabitants)
78 Km E of Agrigento (59770 inhabitants)
82 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 2.8 1985-02-24
08:20:55
37.37 14.46 10 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 2369
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-02-24 08:20:55 ± 0.187
Latitude 37.37 ± 0.01
Longitude 14.46 ± 0.02
Depth (km) 10 ± 4 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 2369

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) 1883.9
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 162
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) 0.00445
Epicentral distance of station farthest from the epicenter (degree) 0.01457
Number of stations at which the event was observed 4
Number of stations from which data was used for origin computation 4
Magnitude information

Md:2.8

Field Value
Value 2.8
Uncertainty
Num. used stations 2
Type of magnitude Md
Reference to an origin 2369
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:07:19
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.ERC.Z. 1985-02-24T08:21:43.50 10.0 undecidable manual SN 294 0.0146 -0.56 0.2
--.ERC.Z. 1985-02-24T08:21:24.00 10.0 undecidable manual PN 294 0.0146 0.66 0.3
--.GIB.Z. 1985-02-24T08:21:19.80 10.0 undecidable manual SG 331 0.0063 0.24 0.6
--.FA1.Z. 1985-02-24T08:21:17.00 10.0 undecidable manual SG 261 0.0057 -0.37 0.7
--.PA1.Z. 1985-02-24T08:21:13.50 10.0 undecidable manual SG 133 0.0045 0.53 0.3
--.GIB.Z. 1985-02-24T08:21:09.00 10.0 negative manual PG 331 0.0063 -0.19 3.2
--.FA1.Z. 1985-02-24T08:21:08.00 10.0 undecidable manual PG 261 0.0057 0.07 1.8
--.PA1.Z. 1985-02-24T08:21:05.00 10.0 undecidable manual PG 133 0.0045 -0.39 1.1
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
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