Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.5 on date 20-08-2013 and time 20:52:10 (Italy) in region 4 km NW San Mauro Castelverde (PA)

A magnitude ML 1.5 earthquake occured in region: 4 km NW San Mauro Castelverde (PA), on

  • 20-08-2013 18:52:10 (UTC)
  • 20-08-2013 20:52:10 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.9420, 14.1680 at 3 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.

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Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
San Mauro Castelverde PA 4 1701 1701
Pollina PA 6 2974 4675
Castelbuono PA 7 8943 13618
Tusa ME 8 2925 16543
Geraci Siculo PA 9 1945 18488
Pettineo ME 11 1350 19838
Motta d'Affermo ME 13 739 20577
Castel di Lucio ME 14 1294 21871
Isnello PA 14 1589 23460
Reitano ME 16 806 24266
Gangi PA 16 6811 31077
Petralia Sottana PA 16 2821 33898
Cefalù PA 17 14393 48291
Petralia Soprana PA 17 3360 51651
Mistretta ME 17 4791 56442
Gratteri PA 17 963 57405
Santo Stefano di Camastra ME 18 4694 62099

Municipalities with at least 50000 inhabitants

An earthquake occurred to
51 Km N of Caltanissetta (63360 inhabitants)
60 Km E of Bagheria (55387 inhabitants)
73 Km E of Palermo (674435 inhabitants)
87 Km NE of Agrigento (59770 inhabitants)
95 Km NW of Catania (314555 inhabitants)
95 Km W of Acireale (52622 inhabitants)
98 Km N of Gela (75827 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 		ML 1.5 2013-08-20
18:52:10		 37.9423 14.1678 3 2015-01-20
11:28:30		 Bollettino Sismico Italiano INGV 4734811
Reviewed
Rev100 		ML 1.5 2013-08-20
18:52:09		 37.9572 14.1743 4 2014-10-21
12:08:56		 Sala Sismica INGV-Roma 4303421
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2013-08-20 18:52:10 ± 0.12
Latitude 37.9423 ± 0.0072
Longitude 14.1678 ± 0.0057
Depth (km) 3 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 4734811

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 667
Semi-minor axis of confidence ellipse (meter) 469
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 350
Circular confidence region, given by single value of horizontal uncertainty (meter) 670.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 142
Number of associated phases, regardless of their use for origin computation 18
Number of defining phases 18
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) 0.11691
Epicentral distance of station farthest from the epicenter (degree) 0.67269
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 9
Magnitudes information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.3
Num. used stations 6
Type of magnitude ML
Reference to an origin 4303421
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2013-08-20 19:03:17

ML:1.5

Field Value
Value 1.5
Uncertainty 0.2
Num. used stations 6
Type of magnitude ML
Reference to an origin 4734811
Agency INGV
Autore Manually reviewed by Franco Mele
Time of creation (UTC) 2015-01-15 13:25:30
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MPG.SHZ. 2013-08-20T18:52:35.04 0.1 undecidable manual S 289 74.6697 50 0.66 79
IV.MUCR.HHZ. 2013-08-20T18:52:31.17 0.1 undecidable manual S 80 62.6928 50 -0.03 95
IV.MNO.SHZ. 2013-08-20T18:52:26.10 0.1 undecidable manual S 91 46.1205 93 -0.05 98
IV.GALF.HHZ. 2013-08-20T18:52:25.02 0.1 undecidable manual S 126 43.3233 93 -0.16 96
IV.MSFR.HHZ. 2013-08-20T18:52:24.07 0.1 undecidable manual S 75 38.4282 94 0.6 87
IV.ALJA.HHZ. 2013-08-20T18:52:24.74 0.1 undecidable manual S 240 42.1245 93 -0.02 99
IV.MPG.SHZ. 2013-08-20T18:52:23.87 0.1 undecidable manual P 289 74.6697 50 -0.25 89
IV.RESU.HHZ. 2013-08-20T18:52:21.96 0.1 undecidable manual S 197 34.2435 94 -0.05 100
IV.MUCR.HHZ. 2013-08-20T18:52:21.40 0.1 undecidable manual P 80 62.6928 50 -0.89 74
IV.MNO.SHZ. 2013-08-20T18:52:19.09 0.1 undecidable manual P 91 46.1205 93 -0.28 93
IV.GALF.HHZ. 2013-08-20T18:52:18.74 0.1 undecidable manual P 126 43.3233 93 -0.07 98
IV.ALJA.HHZ. 2013-08-20T18:52:18.63 0.1 undecidable manual P 240 42.1245 93 0.06 98
IV.MSFR.HHZ. 2013-08-20T18:52:18.36 0.1 undecidable manual P 75 38.4282 94 0.54 89
IV.RESU.HHZ. 2013-08-20T18:52:17.58 0.1 undecidable manual P 197 34.2435 94 0.6 88
IV.GIB.HHZ. 2013-08-20T18:52:14.86 0.3 undecidable manual S 293 13.4754 101 -0.01 78
IV.PETRA.HHZ. 2013-08-20T18:52:14.94 0.3 undecidable manual S 201 12.9759 101 0.25 75
IV.GIB.HHZ. 2013-08-20T18:52:12.32 0.1 undecidable manual P 293 13.4754 101 -0.54 93
IV.PETRA.HHZ. 2013-08-20T18:52:12.43 0.1 undecidable manual P 201 12.9759 101 -0.32 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ALJA.HHE. ML:1.5 0.00011035 0.74 AML other m 2013-08-20T18:52:27.16
IV.ALJA.HHN. ML:1.6 0.0001225 0.66 AML other m 2013-08-20T18:52:27.34
IV.GALF.HHN. ML:1.1 0.000044 0.58 AML other m 2013-08-20T18:52:35.88
IV.GALF.HHE. ML:1.2 0.00004685 0.62 AML other m 2013-08-20T18:52:40.38
IV.GIB.HHN. ML:1.6 0.0005665000000000001 0.36 AML other m 2013-08-20T18:52:16.51
IV.GIB.HHE. ML:1.6 0.0005204999999999999 0.8 AML other m 2013-08-20T18:52:18.16
IV.MNO.SHN. ML:1.4 0.00007390000000000001 1 AML other m 2013-08-20T18:52:38.50
IV.MNO.SHE. ML:1.5 0.00010145000000000001 1.44 AML other m 2013-08-20T18:52:29.12
IV.PETRA.HHN. ML:1.9 0.000989 0.94 AML other m 2013-08-20T18:52:15.31
IV.PETRA.HHE. ML:1.8 0.000887 0.76 AML other m 2013-08-20T18:52:15.85
IV.RESU.HHE. ML:1.3 0.00007955 1.28 AML other m 2013-08-20T18:52:36.02
IV.RESU.HHN. ML:1.3 0.00008135000000000001 0.46 AML other m 2013-08-20T18:52:29.21
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