Earthquake with magnitude of Md 2.5 on date 01-10-1991 and time 07:54:00 (Italy) in region 5 km E Gangi (PA)

A magnitude Md 2.5 earthquake occured in region: 5 km E Gangi (PA), on

  • 01-10-1991 06:54:00 (UTC)
  • 01-10-1991 07:54:00 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 37.81, 14.26 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
Gangi PA 5 6811 6811
Sperlinga EN 9 805 7616
Castel di Lucio ME 10 1294 8910
Geraci Siculo PA 11 1945 10855
San Mauro Castelverde PA 13 1701 12556
Petralia Soprana PA 14 3360 15916
Nicosia EN 14 13899 29815
Petralia Sottana PA 15 2821 32636
Bompietro PA 16 1401 34037
Mistretta ME 16 4791 38828
Blufi PA 18 1029 39857
Pettineo ME 18 1350 41207
Alimena PA 19 2032 43239
Capizzi ME 19 3176 46415
Motta d'Affermo ME 20 739 47154
Castellana Sicula PA 20 3411 50565
Reitano ME 20 806 51371
Tusa ME 20 2925 54296

Municipalities with at least 50000 inhabitants

An earthquake occurred to
39 Km NE of Caltanissetta (63360 inhabitants)
73 Km E of Bagheria (55387 inhabitants)
80 Km W of Catania (314555 inhabitants)
82 Km NE of Agrigento (59770 inhabitants)
82 Km W of Acireale (52622 inhabitants)
83 Km N of Gela (75827 inhabitants)
86 Km E of Palermo (674435 inhabitants)
99 Km N of Vittoria (63339 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 2.5
ML-VAX 2.4
1991-10-01
06:54:00
37.81 14.26 5 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 150269
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1991-10-01 06:54:00 ± 0.324
Latitude 37.81 ± 0.02
Longitude 14.26 ± 0.02
Depth (km) 5 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 150269

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) 3312.1
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 166
Number of associated phases, regardless of their use for origin computation 13
Number of defining phases 13
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.5
Epicentral distance of station closest to the epicenter (degree) 0.00227
Epicentral distance of station farthest from the epicenter (degree) 0.01287
Number of stations at which the event was observed 8
Number of stations from which data was used for origin computation 8
Magnitudes information

Md:2.5

Field Value
Value 2.5
Uncertainty
Num. used stations 3
Type of magnitude Md
Reference to an origin 150269
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 19:20:15

ML:2.4

Field Value
Value 2.4
Uncertainty
Num. used stations 2
Type of magnitude ML
Reference to an origin 150269
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
--.SOI.Z. 1991-10-01T06:54:48.00 10.0 undecidable manual SN 78 0.0129 1.4 0.1
--.MO9.Z. 1991-10-01T06:54:40.00 10.0 undecidable manual SN 79 0.0103 0.35 0.6
--.SA1.Z. 1991-10-01T06:54:33.48 10.0 undecidable manual SG 30 0.0079 1.91 0
--.SOI.Z. 1991-10-01T06:54:27.49 10.0 undecidable manual PN 78 0.0129 0.32 1.3
--.MO9.Z. 1991-10-01T06:54:23.00 10.0 undecidable manual PN 79 0.0103 -0.16 1.6
--.AU9.Z. 1991-10-01T06:54:20.00 10.0 undecidable manual PG 125 0.0084 0.29 1.7
--.ATN.Z. 1991-10-01T06:54:19.50 10.0 undecidable manual PG 69 0.009 -1.42 0.3
--.MEU.Z. 1991-10-01T06:54:18.00 10.0 undecidable manual PG 146 0.0074 0.33 1.8
--.SA1.Z. 1991-10-01T06:54:17.61 10.0 undecidable manual PG 30 0.0079 -0.88 1
--.MNO.Z. 1991-10-01T06:54:15.50 10.0 undecidable manual SG 69 0.0032 0.86 0.4
--.GIB.Z. 1991-10-01T06:54:11.10 10.0 undecidable manual SG 313 0.0023 0.24 0.7
--.MNO.Z. 1991-10-01T06:54:08.60 10.0 undecidable manual PG 69 0.0032 -0.65 1.4
--.GIB.Z. 1991-10-01T06:54:06.60 10.0 undecidable manual PG 313 0.0023 0.12 1.9
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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Type Description Link
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