Earthquake with magnitude of Md 2.4 on date 20-08-1994 and time 12:17:32 (Italy) in region 6 km N Menfi (AG)

A magnitude Md 2.4 earthquake occured in region: 6 km N Menfi (AG), on

  • 20-08-1994 10:17:32 (UTC)
  • 20-08-1994 12:17:32 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.653, 12.945 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
Menfi AG 6 12592 12592
Montevago AG 7 3006 15598
Santa Margherita di Belice AG 8 6363 21961
Partanna TP 9 10607 32568
Salaparuta TP 13 1696 34264
Castelvetrano TP 14 31806 66070
Poggioreale TP 15 1494 67564
Santa Ninfa TP 15 5043 72607
Sambuca di Sicilia AG 15 5877 78484
Campobello di Mazara TP 18 11956 90440
Gibellina TP 19 4115 94555

Municipalities with at least 50000 inhabitants

An earthquake occurred to
31 Km E of Mazara del Vallo (51718 inhabitants)
48 Km E of Marsala (83194 inhabitants)
56 Km SE of Trapani (68759 inhabitants)
63 Km SW of Palermo (674435 inhabitants)
68 Km NW of Agrigento (59770 inhabitants)
69 Km SW of Bagheria (55387 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 1.6
1994-08-20
10:17:32
37.653 12.945 5 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 215179
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1994-08-20 10:17:32 ± 0.236
Latitude 37.6530 ± 0.0348
Longitude 12.9450 ± 0.0127
Depth (km) 5 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 215179

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) 4032.7
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 158
Number of associated phases, regardless of their use for origin computation 9
Number of defining phases 9
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) 0.00105
Epicentral distance of station farthest from the epicenter (degree) 0.00963
Number of stations at which the event was observed 6
Number of stations from which data was used for origin computation 6
Magnitudes information

Md:2.4

Field Value
Value 2.4
Uncertainty
Num. used stations 4
Type of magnitude Md
Reference to an origin 215179
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 20:22:57

ML:1.6

Field Value
Value 1.6
Uncertainty
Num. used stations 3
Type of magnitude ML
Reference to an origin 215179
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. 1994-08-20T10:18:07.10 10.0 undecidable manual SG! 68 0.0083 2.59 0
--.USI.Z. 1994-08-20T10:17:54.45 10.0 undecidable manual PG 9 0.0096 0.73 0.3
--.MCT.Z. 1994-08-20T10:17:53.10 10.0 undecidable manual SG 93 0.0047 1.06 0
--.PL9.Z. 1994-08-20T10:17:52.60 10.0 positive manual PG 69 0.009 -0.41 1.6
--.GIB.Z. 1994-08-20T10:17:50.59 10.0 undecidable manual PG 68 0.0083 -0.26 1.1
--.FAI.Z. 1994-08-20T10:17:47.17 10.0 undecidable manual PG 123 0.0062 0.54 0.7
--.MCT.Z. 1994-08-20T10:17:43.16 10.0 undecidable manual PG 93 0.0047 -0.44 0.9
--.CVT.Z. 1994-08-20T10:17:37.50 10.0 undecidable manual SG 281 0.0011 0.24 0.5
--.CVT.Z. 1994-08-20T10:17:34.97 10.0 negative manual PG 281 0.0011 -0.15 2.8
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