Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.1 on date 09-08-2023 and time 20:15:27 (Italy) in region Castel di Lucio (ME)

A magnitude ML 1.1 earthquake occured in region: Castel di Lucio (ME), on

  • 09-08-2023 18:15:27 (UTC)
  • 09-08-2023 20:15:27 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.8860, 14.3070 at 6 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 9 1350 7435
Reitano ME 10 806 8241
Motta d'Affermo ME 11 739 8980
San Mauro Castelverde PA 11 1701 10681
Tusa ME 13 2925 13606
Gangi PA 13 6811 20417
Geraci Siculo PA 14 1945 22362
Sperlinga EN 14 805 23167
Santo Stefano di Camastra ME 15 4694 27861
Capizzi ME 16 3176 31037
Nicosia EN 17 13899 44936
Pollina PA 19 2974 47910
Cerami EN 19 2006 49916
Caronia ME 20 3364 53280
Castelbuono PA 20 8943 62223
Petralia Soprana PA 20 3360 65583

Municipalities with at least 50000 inhabitants

An earthquake occurred to
49 Km NE of Caltanissetta (63360 inhabitants)
73 Km E of Bagheria (55387 inhabitants)
81 Km NW of Catania (314555 inhabitants)
82 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 1.1 2023-08-09
18:15:27		 37.8858 14.307 6 2023-08-09
19:29:38		 Sala Sismica INGV-Roma 119975571
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-08-09 18:15:27 ± 0.15
Latitude 37.8858 ± 0.0117
Longitude 14.3070 ± 0.0080
Depth (km) 6 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 119975571

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1227
Semi-minor axis of confidence ellipse (meter) 510
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 189
Circular confidence region, given by single value of horizontal uncertainty (meter) 1230.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 123
Number of associated phases, regardless of their use for origin computation 10
Number of defining phases 10
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.33
Epicentral distance of station closest to the epicenter (degree) 0.16727
Epicentral distance of station farthest from the epicenter (degree) 0.47304
Number of stations at which the event was observed 7
Number of stations from which data was used for origin computation 7
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.2
Num. used stations 8
Type of magnitude ML
Reference to an origin 119975571
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-08-09 19:29:38
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MSFR.HHE. 2023-08-09T18:15:38.37 0.6 undecidable manual S 57 29.8479 102 -0.11 51
IV.GALF.HHZ. 2023-08-09T18:15:38.80 0.6 undecidable manual S 130 29.9478 102 0.29 49
IV.ALJA.HHE. 2023-08-09T18:15:38.09 0.3 undecidable manual P 253 50.8158 50 0.33 70
IV.MUCR.HHZ. 2023-08-09T18:15:37.58 0.6 undecidable manual P 70 52.503 50 -0.45 45
IV.CSLB.HHZ. 2023-08-09T18:15:36.03 0.6 undecidable manual S 285 22.5552 106 0.01 53
IV.MSFR.HHE. 2023-08-09T18:15:34.24 0.1 undecidable manual P 57 29.8479 102 0.24 99
IV.GIB.HHZ. 2023-08-09T18:15:33.28 0.6 positive manual P 295 27.1506 103 -0.2 50
IV.GALF.HHZ. 2023-08-09T18:15:33.58 0.6 negative manual P 130 29.9478 102 -0.45 47
IV.PLLN.EHZ. 2023-08-09T18:15:32.12 0.1 positive manual P 310 18.5703 109 0.29 100
IV.CSLB.HHZ. 2023-08-09T18:15:31.82 0.6 positive manual P 285 22.5552 106 -0.77 43
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CSLB.HHE. ML:0.9 0.000056965635 0.2048 AML other m 2023-08-09T18:15:37.23
IV.CSLB.HHN. ML:0.9 0.0000543321 0.2304 AML other m 2023-08-09T18:15:39.43
IV.PLLN.EHN. ML:1.3 0.000179 0.48 AML other m 2023-08-09T18:15:38.31
IV.PLLN.EHE. ML:1.3 0.000177 0.64 AML other m 2023-08-09T18:15:38.59
IV.GIB.HHN. ML:1.4 0.000143 1.14 AML other m 2023-08-09T18:15:39.35
IV.GIB.HHE. ML:1.3 0.0001185 0.48 AML other m 2023-08-09T18:15:43.98
IV.CSLB.HNE. ML:0.9 0.0000618489 0.3712 AML other m 2023-08-09T18:15:40.83
IV.CSLB.HNN. ML:1.0 0.000063434925 0.256 AML other m 2023-08-09T18:15:37.56
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