Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.8 on date 06-10-2023 and time 09:31:26 (UTC) in region 6 km E Gangi (PA)

A magnitude ML 1.8 earthquake occured in region: 6 km E Gangi (PA), on

  • 06-10-2023 09:31:26 (UTC)
  • 06-10-2023 11:31:26 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.8130, 14.2730 at 10 km depth.

The earthquake was located by: Sala Sismica INGV-Roma.

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
Gangi PA 6 6811 6811
Sperlinga EN 9 805 7616
Castel di Lucio ME 9 1294 8910
Geraci Siculo PA 12 1945 10855
Nicosia EN 13 13899 24754
San Mauro Castelverde PA 14 1701 26455
Petralia Soprana PA 15 3360 29815
Mistretta ME 15 4791 34606
Petralia Sottana PA 16 2821 37427
Bompietro PA 17 1401 38828
Pettineo ME 17 1350 40178
Blufi PA 18 1029 41207
Capizzi ME 19 3176 44383
Reitano ME 19 806 45189
Motta d'Affermo ME 19 739 45928
Alimena PA 19 2032 47960
Tusa ME 20 2925 50885

Municipalities with at least 50000 inhabitants

An earthquake occurred to
40 Km NE of Caltanissetta (63360 inhabitants)
73 Km E of Bagheria (55387 inhabitants)
80 Km W of Catania (314555 inhabitants)
82 Km W of Acireale (52622 inhabitants)
82 Km NE of Agrigento (59770 inhabitants)
83 Km N of Gela (75827 inhabitants)
87 Km E of Palermo (674435 inhabitants)
99 Km N of Vittoria (63339 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
Reviewed
Rev100 		ML 1.8 2023-10-06
09:31:26		 37.8127 14.2727 10 2023-10-06
09:42:58		 Sala Sismica INGV-Roma 121816391
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-10-06 09:31:26 ± 0.23
Latitude 37.8127 ± 0.0126
Longitude 14.2727 ± 0.0114
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 121816391

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1274
Semi-minor axis of confidence ellipse (meter) 1048
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 222
Circular confidence region, given by single value of horizontal uncertainty (meter) 1270.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 112
Number of associated phases, regardless of their use for origin computation 27
Number of defining phases 15
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.39
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.79140
Number of stations at which the event was observed 22
Number of stations from which data was used for origin computation 10
Magnitude information

ML:1.8

Field Value
Value 1.8
Uncertainty 0.3
Num. used stations 20
Type of magnitude ML
Reference to an origin 121816391
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-10-06 09:42:58
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.RNI2.HHZ. 2023-10-06T09:33:14.28 3.0 undecidable manual Sn 1.94 0
CR.STON.BHZ. 2023-10-06T09:33:07.18 3.0 undecidable manual Pg 17.200001 0
IV.CAFI.HHZ. 2023-10-06T09:33:06.18 3.0 positive manual Pg 15.43 0
IV.ARVD.HHZ. 2023-10-06T09:33:04.76 3.0 undecidable manual Pg 14.06 0
AC.VLO.HHZ. 2023-10-06T09:32:56.13 3.0 undecidable manual Pg 17.959999 0
IV.FIAM.HHZ. 2023-10-06T09:32:46.38 3.0 positive manual Pg 12.6 0
IV.AGLI.HHZ. 2023-10-06T09:32:46.75 3.0 undecidable manual Pn 5.57 0
IY.MCDA.HHZ.00 2023-10-06T09:32:35.43 3.0 undecidable manual Sn 0.91 0
IV.PANTE.HHZ. 2023-10-06T09:32:21.27 3.0 undecidable manual Sn -0.52 0
IV.SALB.HHZ. 2023-10-06T09:32:12.57 3.0 undecidable manual Pg 4.79 0
IV.IVPL.HHZ. 2023-10-06T09:31:42.32 0.6 negative manual P 44 87.8454 50 0.74 39
IV.ACATE.EHZ. 2023-10-06T09:31:39.11 3.0 positive manual P 0.81 0
IV.MSFR.HHE. 2023-10-06T09:31:39.77 0.6 undecidable manual S 49 37.1295 50 0.68 44
IV.ECTS.HHZ. 2023-10-06T09:31:39.95 0.1 undecidable manual P 84 74.6697 50 0.4 91
IV.ALJA.HHZ. 2023-10-06T09:31:38.66 3.0 undecidable manual S 0.3 0
IV.LIBRI.HHZ. 2023-10-06T09:31:37.79 0.6 positive manual P 62 64.7907 50 -0.23 48
IV.MUCR.HHZ. 2023-10-06T09:31:36.77 0.6 undecidable manual P 64 58.497 50 -0.28 48
IV.PLLN.EHZ. 2023-10-06T09:31:36.05 0.6 undecidable manual S 330 22.9548 114 0.87 42
IV.GIB.HHE. 2023-10-06T09:31:36.88 0.3 undecidable manual S 312 29.2485 50 -0.08 79
IV.GALF.HHZ. 2023-10-06T09:31:36.56 0.3 undecidable manual S 114 28.1496 50 -0.12 78
IV.CSLB.HHZ. 2023-10-06T09:31:34.94 0.6 undecidable manual S 306 23.3544 113 -0.36 50
IV.MSFR.HHE. 2023-10-06T09:31:33.30 0.1 undecidable manual P 49 37.1295 50 -0.46 96
IV.GIB.HHE. 2023-10-06T09:31:32.17 0.1 undecidable manual P 312 29.2485 50 -0.36 99
IV.GALF.HHZ. 2023-10-06T09:31:32.03 0.1 undecidable manual P 114 28.1496 50 -0.34 100
IV.RESU.HNZ. 2023-10-06T09:31:32.72 0.1 undecidable manual P 226 26.3514 50 0.62 93
IV.PLLN.EHZ. 2023-10-06T09:31:31.54 0.3 negative manual P 330 22.9548 114 0.04 81
IV.CSLB.HHZ. 2023-10-06T09:31:31.16 0.6 positive manual P 306 23.3544 113 -0.42 50
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CSLB.HHE. ML:1.4 0.00015999999999999999 0.62 AML other m 2023-10-06T09:31:36.75
IV.CSLB.HNE. ML:1.4 0.000158 0.6 AML other m 2023-10-06T09:31:36.44
IV.PLLN.EHN. ML:1.9 0.00045850000000000003 0.32 AML other m 2023-10-06T09:31:37.70
IV.GALF.HHN. ML:2.2 0.0007955000000000001 0.32 AML other m 2023-10-06T09:31:38.32
IV.GALF.HNN. ML:1.9 0.0004355 0.28 AML other m 2023-10-06T09:31:38.32
IV.CSLB.HNN. ML:1.3 0.0001185 0.72 AML other m 2023-10-06T09:31:40.68
IV.CSLB.HHN. ML:1.2 0.00011235000000000001 0.7 AML other m 2023-10-06T09:31:40.68
IV.PLLN.EHE. ML:1.7 0.000311 0.64 AML other m 2023-10-06T09:31:42.23
IV.GALF.HHE. ML:2.2 0.0009065000000000001 0.56 AML other m 2023-10-06T09:31:43.84
IV.GALF.HNE. ML:1.9 0.0004515 0.5 AML other m 2023-10-06T09:31:43.84
IV.MUCR.HHE. ML:1.9 0.000168 0.42 AML other m 2023-10-06T09:31:46.35
IV.MUCR.HHN. ML:1.8 0.000136 0.86 AML other m 2023-10-06T09:31:48.69
IV.ALJA.HHE. ML:1.6 0.000131 0.44 AML other m 2023-10-06T09:31:49.09
IV.ALJA.HHN. ML:1.6 0.000115 0.26 AML other m 2023-10-06T09:31:50.30
IV.LIBRI.HNN. ML:1.9 0.00014749999999999998 0.26 AML other m 2023-10-06T09:31:51.77
IV.LIBRI.HHE. ML:1.8 0.00010449999999999999 0.48 AML other m 2023-10-06T09:31:53.13
IV.LIBRI.HNE. ML:1.9 0.000157 1.52 AML other m 2023-10-06T09:31:53.17
IV.LIBRI.HHN. ML:1.5 0.000058700000000000004 1.58 AML other m 2023-10-06T09:31:54.11
IV.IVPL.HHN. ML:2.0 0.00011615 0.88 AML other m 2023-10-06T09:31:56.55
IV.IVPL.HHE. ML:2.2 0.000179 1.06 AML other m 2023-10-06T09:32:02.95
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