Earthquake with magnitude of Md 2.5 on date 23-05-1998 and time 12:26:19 (Italy) in region 3 km SE Santa Ninfa (TP)

A magnitude Md 2.5 earthquake occured in region: 3 km SE Santa Ninfa (TP), on

  • 23-05-1998 10:26:19 (UTC)
  • 23-05-1998 12:26:19 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.76, 12.914 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
Santa Ninfa TP 3 5043 5043
Partanna TP 5 10607 15650
Gibellina TP 7 4115 19765
Salaparuta TP 8 1696 21461
Montevago AG 9 3006 24467
Poggioreale TP 11 1494 25961
Salemi TP 12 10794 36755
Santa Margherita di Belice AG 12 6363 43118
Castelvetrano TP 14 31806 74924
Vita TP 15 2056 76980
Calatafimi-Segesta TP 18 6712 83692
Menfi AG 19 12592 96284

Municipalities with at least 50000 inhabitants

An earthquake occurred to
31 Km E of Mazara del Vallo (51718 inhabitants)
42 Km E of Marsala (83194 inhabitants)
45 Km SE of Trapani (68759 inhabitants)
56 Km SW of Palermo (674435 inhabitants)
63 Km SW of Bagheria (55387 inhabitants)
77 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 2.5
ML-VAX 1.9
1998-05-23
10:26:19
37.76 12.914 5 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 339419
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1998-05-23 10:26:19 ± 0.45
Latitude 37.7600 ± 0.0486
Longitude 12.9140 ± 0.0146
Depth (km) 5 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 339419

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) 5558.4
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 217
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) 0.0034
Epicentral distance of station farthest from the epicenter (degree) 0.00834
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:2.5

Field Value
Value 2.5
Uncertainty
Num. used stations 1
Type of magnitude Md
Reference to an origin 339419
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 22:17:56

ML:1.9

Field Value
Value 1.9
Uncertainty
Num. used stations 4
Type of magnitude ML
Reference to an origin 339419
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
--.CS9.Z. 1998-05-23T10:26:51.46 10.0 undecidable manual SG 78 0.0083 -0.51 0.4
--.GIB.Z. 1998-05-23T10:26:50.75 10.0 undecidable manual SG 74 0.0081 -0.48 0.4
--.GIB.Z. 1998-05-23T10:26:38.18 10.0 undecidable manual PG 74 0.0081 0.47 1.1
--.CS9.Z. 1998-05-23T10:26:38.33 10.0 undecidable manual PG 78 0.0083 0.19 1.8
--.LVI.Z. 1998-05-23T10:26:38.34 10.0 undecidable manual SG 296 0.0045 -0.09 0.9
--.ERC.Z. 1998-05-23T10:26:34.78 10.0 undecidable manual SG 316 0.0034 0.88 0.1
--.LVI.Z. 1998-05-23T10:26:30.32 10.0 undecidable manual PG 296 0.0045 0 2.3
--.ERC.Z. 1998-05-23T10:26:27.13 10.0 undecidable manual PG 316 0.0034 -0.58 1
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