Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.0 on date 15-10-2023 and time 14:35:16 (Italy) in region 4 km N Niscemi (CL)

A magnitude ML 2.0 earthquake occured in region: 4 km N Niscemi (CL), on

  • 15-10-2023 12:35:16 (UTC)
  • 15-10-2023 14:35:16 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.1800, 14.3900 at 21 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
Niscemi CL 4 27558 27558
San Michele di Ganzaria CT 12 3245 30803
San Cono CT 13 2697 33500
Caltagirone CT 13 38686 72186
Mirabella Imbaccari CT 17 4912 77098
Gela CL 18 75827 152925
Butera CL 18 4754 157679
Mazzarrone CT 19 4078 161757
Acate RG 19 10954 172711

Municipalities with at least 50000 inhabitants

An earthquake occurred to
18 Km NE of Gela (75827 inhabitants)
29 Km NW of Vittoria (63339 inhabitants)
41 Km NW of Ragusa (73313 inhabitants)
45 Km SE of Caltanissetta (63360 inhabitants)
49 Km NW of Modica (54633 inhabitants)
72 Km SW of Catania (314555 inhabitants)
73 Km E of Agrigento (59770 inhabitants)
81 Km W of Siracusa (122291 inhabitants)
84 Km SW 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
Reviewed
Rev100 		ML 2.0 2023-10-15
12:35:16		 37.1798 14.3898 21 2023-10-15
12:40:14		 Sala Sismica INGV-Roma 122108851
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-10-15 12:35:16 ± 0.21
Latitude 37.1798 ± 0.0081
Longitude 14.3898 ± 0.0113
Depth (km) 21 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 122108851

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 927
Semi-minor axis of confidence ellipse (meter) 583
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 48
Circular confidence region, given by single value of horizontal uncertainty (meter) 930.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 169
Number of associated phases, regardless of their use for origin computation 23
Number of defining phases 23
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.37
Epicentral distance of station closest to the epicenter (degree) 0.04766
Epicentral distance of station farthest from the epicenter (degree) 0.94339
Number of stations at which the event was observed 13
Number of stations from which data was used for origin computation 13
Magnitude information

ML:2.0

Field Value
Value 2.0
Uncertainty 0.3
Num. used stations 26
Type of magnitude ML
Reference to an origin 122108851
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-10-15 12:40:14
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.HAVL.HHZ. 2023-10-15T12:35:39.03 0.6 undecidable manual S 110 69.2751 100 0.91 35
IV.HSRS.HHZ. 2023-10-15T12:35:39.52 0.6 undecidable manual S 97 74.1702 99 0.09 45
IV.AGST.EHZ. 2023-10-15T12:35:39.54 0.6 undecidable manual S 83 74.4699 99 0.05 45
IV.MUCR.HHZ. 2023-10-15T12:35:34.71 0.6 positive manual P 24 104.7174 96 0.1 42
IV.CSLB.HHZ. 2023-10-15T12:35:32.13 0.1 undecidable manual P 341 88.9443 97 -0.06 88
IV.HLNI.HHZ. 2023-10-15T12:35:32.24 0.6 undecidable manual S 66 46.5201 106 0.05 48
IV.HMDC.HHZ. 2023-10-15T12:35:31.81 0.6 undecidable manual S 125 42.5241 107 0.63 41
IV.CROCE.HHZ. 2023-10-15T12:35:30.41 0.6 undecidable manual S 162 40.626 108 -0.27 46
IV.AGST.EHZ. 2023-10-15T12:35:29.31 0.1 undecidable manual P 83 74.4699 99 -0.67 77
IV.HSRS.HHZ. 2023-10-15T12:35:29.39 0.6 negative manual P 97 74.1702 99 -0.55 40
IV.RESU.HHE. 2023-10-15T12:35:28.71 0.1 undecidable manual P 331 59.496 101 1 67
IV.HAVL.HHZ. 2023-10-15T12:35:28.94 0.1 undecidable manual P 110 69.2751 100 -0.24 88
IV.HVZN.HHZ. 2023-10-15T12:35:28.28 0.3 undecidable manual S 90 28.749 117 0.51 67
IV.HVIT.HHZ. 2023-10-15T12:35:27.16 0.6 undecidable manual S 151 23.8539 123 0.54 44
IV.ACATE.EHZ. 2023-10-15T12:35:26.44 0.6 undecidable manual S 150 19.869 129 0.67 42
IV.HLNI.HHZ. 2023-10-15T12:35:25.29 0.1 positive manual P 66 46.5201 106 -0.47 87
IV.CROCE.HHZ. 2023-10-15T12:35:24.52 0.1 negative manual P 162 40.626 108 -0.37 91
IV.HMDC.HHZ. 2023-10-15T12:35:24.97 0.1 positive manual P 125 42.5241 107 -0.21 93
IV.RAFF.HHZ. 2023-10-15T12:35:23.17 0.3 undecidable manual S 333 5.2947 163 -0.39 71
IV.HVZN.HHZ. 2023-10-15T12:35:23.22 0.1 positive manual P 90 28.749 117 0.02 99
IV.HVIT.HHZ. 2023-10-15T12:35:22.36 0.1 negative manual P 151 23.8539 123 -0.18 97
IV.ACATE.EHZ. 2023-10-15T12:35:22.05 0.1 negative manual P 150 19.869 129 0 100
IV.RAFF.HHZ. 2023-10-15T12:35:20.90 0.1 undecidable manual P 333 5.2947 163 0.12 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.RAFF.HNN. ML:1.6 0.00028649999999999997 0.22 AML other m 2023-10-15T12:35:25.47
IV.RAFF.HNE. ML:1.6 0.000335 0.26 AML other m 2023-10-15T12:35:25.48
IV.RAFF.HHN. ML:2.0 0.0008065 0.24 AML other m 2023-10-15T12:35:25.48
IV.RAFF.HHE. ML:1.7 0.000381 0.3 AML other m 2023-10-15T12:35:25.49
IV.ACATE.HNE. ML:2.4 0.001355 1.58 AML other m 2023-10-15T12:35:27.14
IV.ACATE.EHE. ML:2.3 0.0012050000000000001 1.56 AML other m 2023-10-15T12:35:27.15
IV.HVIT.HHN. ML:2.2 0.0006979999999999999 0.2 AML other m 2023-10-15T12:35:27.30
IV.HVIT.HHE. ML:2.1 0.0006274999999999999 0.64 AML other m 2023-10-15T12:35:27.70
IV.ACATE.EHN. ML:2.1 0.0006745 0.28 AML other m 2023-10-15T12:35:28.27
IV.ACATE.HNN. ML:2.1 0.000669 0.28 AML other m 2023-10-15T12:35:28.27
IV.HVZN.HHN. ML:2.1 0.00055 1.04 AML other m 2023-10-15T12:35:29.08
IV.HVZN.HNN. ML:2.2 0.000634 1.04 AML other m 2023-10-15T12:35:29.09
IV.HVZN.HHE. ML:1.9 0.000301 0.56 AML other m 2023-10-15T12:35:29.96
IV.HVZN.HNE. ML:1.9 0.000352 0.42 AML other m 2023-10-15T12:35:29.97
IV.CROCE.HHN. ML:1.7 0.000157 0.46 AML other m 2023-10-15T12:35:31.10
IV.CROCE.HHE. ML:1.6 0.0001374 0.36 AML other m 2023-10-15T12:35:31.15
IV.HMDC.HHN. ML:2.2 0.00041400000000000003 1.62 AML other m 2023-10-15T12:35:32.14
IV.HMDC.HNN. ML:2.1 0.00033899999999999995 1.62 AML other m 2023-10-15T12:35:32.14
IV.HMDC.HNE. ML:2.1 0.000359 1.48 AML other m 2023-10-15T12:35:32.92
IV.HMDC.HHE. ML:2.1 0.00039600000000000003 1.48 AML other m 2023-10-15T12:35:32.18
IV.HLNI.HHN. ML:1.7 0.0001295 0.84 AML other m 2023-10-15T12:35:32.78
IV.HLNI.HHE. ML:1.6 0.000106 0.78 AML other m 2023-10-15T12:35:32.89
IV.HAVL.HHN. ML:2.2 0.0002715 1.7 AML other m 2023-10-15T12:35:42.09
IV.HAVL.HHE. ML:2.1 0.0001955 0.78 AML other m 2023-10-15T12:35:42.55
IV.CSLB.HHE. ML:1.3 0.000024 0.6 AML other m 2023-10-15T12:35:50.45
IV.CSLB.HHN. ML:1.2 0.0000213 0.34 AML other m 2023-10-15T12:35:50.58
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
Waveforms Seismic signals in miniseed + resp format Download