Earthquake with magnitude of Md 1.7 on date 18-07-1993 and time 19:56:33 (UTC) in region 6 km SE Cefalù (PA)

A magnitude Md 1.7 earthquake occured in region: 6 km SE Cefalù (PA), on

  • 18-07-1993 19:56:33 (UTC)
  • 18-07-1993 21:56:33 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.9970, 14.0700 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
Cefalù PA 6 14393 14393
Pollina PA 7 2974 17367
Castelbuono PA 7 8943 26310
Isnello PA 8 1589 27899
Gratteri PA 9 963 28862
Lascari PA 11 3588 32450
San Mauro Castelverde PA 14 1701 34151
Collesano PA 14 4054 38205
Tusa ME 15 2925 41130
Campofelice di Roccella PA 16 7537 48667
Geraci Siculo PA 17 1945 50612
Pettineo ME 20 1350 51962

Municipalities with at least 50000 inhabitants

An earthquake occurred to
50 Km E of Bagheria (55387 inhabitants)
56 Km N of Caltanissetta (63360 inhabitants)
63 Km E of Palermo (674435 inhabitants)
87 Km NE 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 1.7 1993-07-18
19:56:33
37.997 14.07 5 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 191569
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1993-07-18 19:56:33 ± 0.301
Latitude 37.9970 ± 0.0236
Longitude 14.0700 ± 0.0184
Depth (km) 5 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 191569

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) 3074.3
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 198
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) 0.4
Epicentral distance of station closest to the epicenter (degree) 0.00024
Epicentral distance of station farthest from the epicenter (degree) 0.00097
Number of stations at which the event was observed 4
Number of stations from which data was used for origin computation 4
Magnitude information

Md:1.7

Field Value
Value 1.7
Uncertainty
Num. used stations 4
Type of magnitude Md
Reference to an origin 191569
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 19:59:59
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
--.TU9.Z. 1993-07-18T19:56:39.48 10.0 undecidable manual SG 107 0.111 0.73 0.2
--.TU9.Z. 1993-07-18T19:56:37.58 10.0 undecidable manual PG 107 0.111 0.86 0.4
--.GIB.Z. 1993-07-18T19:56:36.68 10.0 undecidable manual SG 256 0.0222 0.55 0.4
--.CS9.Z. 1993-07-18T19:56:36.65 10.0 undecidable manual SG 179 0.0555 -0.18 0.7
--.GIB.Z. 1993-07-18T19:56:35.19 10.0 positive manual PG 256 0.0222 -0.02 3.6
--.CS9.Z. 1993-07-18T19:56:35.36 10.0 undecidable manual PG 179 0.0555 -0.24 1.6
--.PL9.Z. 1993-07-18T19:56:35.95 10.0 undecidable manual SG 95 0.0555 -0.8 0.2
--.PL9.Z. 1993-07-18T19:56:34.93 10.0 undecidable manual PG 95 0.0555 -0.63 0.8
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