Earthquake with magnitude of Md 2.1 on date 20-05-1993 and time 15:07:24 (UTC) in region 2 km SE Pollina (PA)

A magnitude Md 2.1 earthquake occured in region: 2 km SE Pollina (PA), on

  • 20-05-1993 15:07:24 (UTC)
  • 20-05-1993 17:07:24 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.9760, 14.1610 at 4 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
Pollina PA 3 2974 2974
Tusa ME 7 2925 5899
San Mauro Castelverde PA 7 1701 7600
Castelbuono PA 8 8943 16543
Pettineo ME 12 1350 17893
Motta d'Affermo ME 12 739 18632
Geraci Siculo PA 13 1945 20577
Isnello PA 14 1589 22166
Cefalù PA 14 14393 36559
Reitano ME 16 806 37365
Castel di Lucio ME 16 1294 38659
Gratteri PA 16 963 39622
Santo Stefano di Camastra ME 17 4694 44316
Mistretta ME 18 4791 49107
Lascari PA 19 3588 52695
Petralia Sottana PA 20 2821 55516
Gangi PA 20 6811 62327

Municipalities with at least 50000 inhabitants

An earthquake occurred to
54 Km N of Caltanissetta (63360 inhabitants)
58 Km E of Bagheria (55387 inhabitants)
72 Km E of Palermo (674435 inhabitants)
90 Km NE of Agrigento (59770 inhabitants)
97 Km NW of Catania (314555 inhabitants)
97 Km W of Acireale (52622 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 2.1
ML-VAX 1.5
1993-05-20
15:07:24
37.976 14.161 4 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 185589
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1993-05-20 15:07:24 ± 0.197
Latitude 37.9760 ± 0.0118
Longitude 14.1610 ± 0.0088
Depth (km) 4 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 185589

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) 1521.1
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 145
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) 0.1
Epicentral distance of station closest to the epicenter (degree) 0.00016
Epicentral distance of station farthest from the epicenter (degree) 0.00380
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:2.1

Field Value
Value 2.1
Uncertainty
Num. used stations 3
Type of magnitude Md
Reference to an origin 185589
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 19:54:12

ML:1.5

Field Value
Value 1.5
Uncertainty
Num. used stations 2
Type of magnitude ML
Reference to an origin 185589
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(km) Takeoff_angle Residual Weight
--.MNO.Z. 1993-05-20T15:07:40.33 10.0 undecidable manual SG 95 0.4218 -0.22 0.1
--.MNO.Z. 1993-05-20T15:07:33.87 10.0 undecidable manual PG 95 0.4218 0.23 0.3
--.GIB.Z. 1993-05-20T15:07:28.92 10.0 undecidable manual SG 277 0.0999 0.37 0
--.CS9.Z. 1993-05-20T15:07:27.81 10.0 undecidable manual SG 241 0.0666 0.18 0.3
--.GIB.Z. 1993-05-20T15:07:26.59 10.0 undecidable manual PG 277 0.0999 -0.12 1.2
--.PL9.Z. 1993-05-20T15:07:26.10 10.0 undecidable manual SG 319 0.0222 0.13 0.5
--.CS9.Z. 1993-05-20T15:07:26.10 10.0 positive manual PG 241 0.0666 -0.07 2.8
--.PL9.Z. 1993-05-20T15:07:25.80 10.0 positive manual PG 319 0.0222 -0.09 2.7
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