Earthquake with magnitude of Md 2.4 on date 20-04-1996 and time 23:19:45 (Italy) in region 3 km SW Gibellina (TP)

A magnitude Md 2.4 earthquake occured in region: 3 km SW Gibellina (TP), on

  • 20-04-1996 21:19:45 (UTC)
  • 20-04-1996 23:19:45 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.789, 12.85 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
Gibellina TP 3 4115 4115
Santa Ninfa TP 3 5043 9158
Salemi TP 5 10794 19952
Partanna TP 8 10607 30559
Vita TP 10 2056 32615
Castelvetrano TP 13 31806 64421
Calatafimi-Segesta TP 14 6712 71133
Salaparuta TP 14 1696 72829
Montevago AG 16 3006 75835
Poggioreale TP 17 1494 77329
Santa Margherita di Belice AG 19 6363 83692
Campobello di Mazara TP 19 11956 95648

Municipalities with at least 50000 inhabitants

An earthquake occurred to
27 Km NE of Mazara del Vallo (51718 inhabitants)
36 Km E of Marsala (83194 inhabitants)
39 Km SE of Trapani (68759 inhabitants)
58 Km SW of Palermo (674435 inhabitants)
66 Km SW of Bagheria (55387 inhabitants)
84 Km NW of Agrigento (59770 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
Bulletin
Rev1000
Md 2.4
ML-VAX 1.8
1996-04-20
21:19:45
37.789 12.85 5 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 244729
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1996-04-20 21:19:45 ± 0.505
Latitude 37.7890 ± 0.0516
Longitude 12.8500 ± 0.0213
Depth (km) 5 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 244729

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) 6033.5
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 215
Number of associated phases, regardless of their use for origin computation 7
Number of defining phases 7
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.4
Epicentral distance of station closest to the epicenter (degree) 0.00283
Epicentral distance of station farthest from the epicenter (degree) 0.00874
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:2.4

Field Value
Value 2.4
Uncertainty
Num. used stations 3
Type of magnitude Md
Reference to an origin 244729
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 20:51:36

ML:1.8

Field Value
Value 1.8
Uncertainty
Num. used stations 3
Type of magnitude ML
Reference to an origin 244729
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
--.GIB.Z. 1996-04-20T21:20:18.35 10.0 undecidable manual SG 77 0.0085 -0.36 0.6
--.GIB.Z. 1996-04-20T21:20:05.10 10.0 undecidable manual PG 77 0.0085 0.39 1.4
--.CS9.Z. 1996-04-20T21:20:05.18 10.0 undecidable manual PG 80 0.0087 0.09 1.7
--.LVI.Z. 1996-04-20T21:20:03.73 10.0 undecidable manual SG 295 0.004 1.05 0.2
--.ERC.Z. 1996-04-20T21:19:58.72 10.0 undecidable manual SG 320 0.0028 0.81 0.3
--.LVI.Z. 1996-04-20T21:19:55.10 10.0 undecidable manual PG 295 0.004 -0.25 2
--.ERC.Z. 1996-04-20T21:19:51.76 10.0 undecidable manual PG 320 0.0028 -0.84 0.7
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download