Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.9 on date 31-07-2023 and time 10:47:42 (UTC) in region 1 km S Castel di Lucio (ME)

A magnitude ML 1.9 earthquake occured in region: 1 km S Castel di Lucio (ME), on

  • 31-07-2023 10:47:42 (UTC)
  • 31-07-2023 12:47:42 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.8790, 14.3110 at 31 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
Castel di Lucio ME 1 1294 1294
Mistretta ME 7 4791 6085
Pettineo ME 10 1350 7435
Reitano ME 11 806 8241
San Mauro Castelverde PA 11 1701 9942
Motta d'Affermo ME 12 739 10681
Gangi PA 13 6811 17492
Sperlinga EN 13 805 18297
Tusa ME 13 2925 21222
Geraci Siculo PA 14 1945 23167
Capizzi ME 15 3176 26343
Santo Stefano di Camastra ME 16 4694 31037
Nicosia EN 16 13899 44936
Cerami EN 19 2006 46942
Pollina PA 19 2974 49916
Caronia ME 20 3364 53280
Petralia Soprana PA 20 3360 56640

Municipalities with at least 50000 inhabitants

An earthquake occurred to
48 Km NE of Caltanissetta (63360 inhabitants)
74 Km E of Bagheria (55387 inhabitants)
80 Km NW of Catania (314555 inhabitants)
81 Km W of Acireale (52622 inhabitants)
87 Km E of Palermo (674435 inhabitants)
90 Km NE of Agrigento (59770 inhabitants)
91 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
Reviewed
Rev100 		ML 1.9 2023-07-31
10:47:42		 37.8792 14.3113 31 2023-07-31
11:11:41		 Sala Sismica INGV-Roma 119729151
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-07-31 10:47:42 ± 0.36
Latitude 37.8792 ± 0.0144
Longitude 14.3113 ± 0.0125
Depth (km) 31 ± 3 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 119729151

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1396
Semi-minor axis of confidence ellipse (meter) 1051
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 210
Circular confidence region, given by single value of horizontal uncertainty (meter) 1400.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 156
Number of associated phases, regardless of their use for origin computation 13
Number of defining phases 11
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.28
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.72305
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 7
Magnitude information

ML:1.9

Field Value
Value 1.9
Uncertainty 0.2
Num. used stations 8
Type of magnitude ML
Reference to an origin 119729151
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-07-31 11:11:41
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.IVPL.HHZ. 2023-07-31T10:47:57.15 0.3 undecidable manual P 46 80.2641 106 0.37 63
IV.GALF.HHZ. 2023-07-31T10:47:55.12 0.3 undecidable manual S 130 29.1486 133 0.07 73
IV.MSFR.HHE. 2023-07-31T10:47:55.63 0.6 undecidable manual S 55 29.9478 132 0.42 45
IV.ALJA.HHZ. 2023-07-31T10:47:54.21 3.0 undecidable manual P 0
IV.CSLB.HHE. 2023-07-31T10:47:54.00 0.3 undecidable manual S 286 23.1546 140 0.06 75
IV.PLLN.EHE. 2023-07-31T10:47:53.10 0.6 undecidable manual S 311 19.3695 145 -0.23 48
IV.MUCR.HHZ. 2023-07-31T10:47:52.53 0.1 undecidable manual P 70 52.4031 116 -0.23 91
IV.GALF.HHZ. 2023-07-31T10:47:50.00 1.0 undecidable manual P 130 29.1486 133 0.24 24
IV.GIB.HHZ. 2023-07-31T10:47:49.94 0.1 undecidable manual P 296 27.8499 134 0.32 94
IV.MSFR.HHE. 2023-07-31T10:47:49.40 0.1 undecidable manual P 55 29.9478 132 -0.45 91
IV.CSLB.HHE. 2023-07-31T10:47:49.02 0.3 undecidable manual P 286 23.1546 140 -0.1 74
IV.PLLN.EHE. 2023-07-31T10:47:48.73 0.1 undecidable manual P 311 19.3695 145 -0.04 100
IV.EPZF.HHZ. 2023-07-31T10:47:45.20 3.0 undecidable manual P 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.GIB.HHE. ML:2.1 0.0004035 0.38 AML other m 2023-07-31T10:47:58.57
IV.GIB.HHN. ML:1.8 0.0002415 0.38 AML other m 2023-07-31T10:47:58.98
IV.GALF.HHN. ML:2.3 0.0006585 1.22 AML other m 2023-07-31T10:47:59.85
IV.GALF.HHE. ML:1.9 0.00028149999999999996 1.06 AML other m 2023-07-31T10:48:04.21
IV.MUCR.HHE. ML:1.7 0.00010899999999999999 0.34 AML other m 2023-07-31T10:48:05.44
IV.MUCR.HHN. ML:1.7 0.0001102 1 AML other m 2023-07-31T10:48:06.31
IV.IVPL.HHN. ML:1.9 0.00010055 1 AML other m 2023-07-31T10:48:13.78
IV.IVPL.HHE. ML:2.0 0.000127 1.16 AML other m 2023-07-31T10:48:18.37
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