Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.0 on date 23-09-2019 and time 11:18:47 (Italy) in region 3 km E Petralia Soprana (PA)

A magnitude ML 1.0 earthquake occured in region: 3 km E Petralia Soprana (PA), on

  • 23-09-2019 09:18:47 (UTC)
  • 23-09-2019 11:18:47 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.7950, 14.1390 at 13 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
Petralia Soprana PA 3 3360 3360
Petralia Sottana PA 4 2821 6181
Gangi PA 6 6811 12992
Bompietro PA 6 1401 14393
Blufi PA 7 1029 15422
Geraci Siculo PA 7 1945 17367
Castellana Sicula PA 8 3411 20778
Alimena PA 12 2032 22810
Polizzi Generosa PA 12 3407 26217
San Mauro Castelverde PA 14 1701 27918
Resuttano CL 16 2038 29956
Castelbuono PA 16 8943 38899
Castel di Lucio ME 18 1294 40193
Sperlinga EN 19 805 40998

Municipalities with at least 50000 inhabitants

An earthquake occurred to
34 Km N of Caltanissetta (63360 inhabitants)
64 Km SE of Bagheria (55387 inhabitants)
73 Km NE of Agrigento (59770 inhabitants)
77 Km SE of Palermo (674435 inhabitants)
82 Km N of Gela (75827 inhabitants)
90 Km W of Catania (314555 inhabitants)
93 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 		ML 1.0 2019-09-23
09:18:47		 37.7953 14.1388 13 2020-02-28
16:42:11		 Bollettino Sismico Italiano INGV 74338921
Reviewed
Rev100 		ML 1.2 2019-09-23
09:18:46		 37.8447 14.1043 27 2019-09-23
09:25:25		 Sala Sismica INGV-Roma 72689201
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-09-23 09:18:47 ± 0.24
Latitude 37.7953 ± 0.0108
Longitude 14.1388 ± 0.0205
Depth (km) 13 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 74338921

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1350
Semi-minor axis of confidence ellipse (meter) 1261
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 56
Circular confidence region, given by single value of horizontal uncertainty (meter) 1350.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 130
Number of associated phases, regardless of their use for origin computation 11
Number of defining phases 11
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.35
Epicentral distance of station closest to the epicenter (degree) 0.04227
Epicentral distance of station farthest from the epicenter (degree) 0.63042
Number of stations at which the event was observed 8
Number of stations from which data was used for origin computation 8
Magnitudes information

ML:1.0

Field Value
Value 1.0
Uncertainty 0.3
Num. used stations 4
Type of magnitude ML
Reference to an origin 74338921
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2019-12-05 11:35:46

ML:1.2

Field Value
Value 1.2
Uncertainty 0.4
Num. used stations 4
Type of magnitude ML
Reference to an origin 72689201
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-09-23 09:25:25
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MUCR.HHE. 2019-09-23T09:18:59.66 0.3 undecidable manual P 67 69.9744 92 0.38 66
IV.PLLN.EHZ. 2019-09-23T09:18:56.11 0.6 undecidable manual S 1 21.867 102 0.68 44
IV.MSFR.HHZ. 2019-09-23T09:18:55.45 0.3 undecidable manual P 56 47.619 93 -0.4 69
IV.CSLB.HHZ. 2019-09-23T09:18:54.58 0.6 undecidable manual S 336 17.2716 109 0.33 49
IV.GALF.HHZ. 2019-09-23T09:18:54.54 0.3 undecidable manual P 104 38.628 94 0.07 75
IV.GIB.HHE. 2019-09-23T09:18:52.39 0.3 undecidable manual P 335 23.754 100 0.2 74
IV.PLLN.EHZ. 2019-09-23T09:18:51.53 0.3 undecidable manual P 1 21.867 102 -0.37 73
IV.PETRA.HHN. 2019-09-23T09:18:51.84 0.6 undecidable manual S 334 4.6953 155 0.13 53
IV.RESU.HHZ. 2019-09-23T09:18:51.66 0.3 undecidable manual P 204 17.9709 108 0.34 73
IV.CSLB.HHZ. 2019-09-23T09:18:50.86 0.1 undecidable manual P 336 17.2716 109 -0.36 98
IV.PETRA.HHN. 2019-09-23T09:18:49.41 0.1 undecidable manual P 334 4.6953 155 -0.34 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CSLB.HHE. ML:0.7 0.00003875 1.2 AML other m 2019-09-23T09:18:55.81
IV.CSLB.HHN. ML:0.8 0.00004935000000000001 0.86 AML other m 2019-09-23T09:18:55.44
IV.RESU.HHE. ML:1.3 0.0001379 0.36 AML other m 2019-09-23T09:19:00.16
IV.RESU.HHN. ML:1.4 0.00017649999999999998 1.04 AML other m 2019-09-23T09:19:02.94
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