Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.1 on date 18-09-2023 and time 01:10:05 (UTC) in region 9 km W Pachino (SR)

A magnitude ML 2.1 earthquake occured in region: 9 km W Pachino (SR), on

  • 18-09-2023 01:10:05 (UTC)
  • 18-09-2023 03:10:05 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 36.7140, 14.9940 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
Pachino SR 9 22205 22205
Ispica RG 11 16061 38266
Rosolini SR 12 21427 59693
Portopalo di Capo Passero SR 13 3887 63580
Pozzallo RG 13 19552 83132

Municipalities with at least 50000 inhabitants

An earthquake occurred to
26 Km SE of Modica (54633 inhabitants)
33 Km SE of Ragusa (73313 inhabitants)
47 Km SW of Siracusa (122291 inhabitants)
48 Km SE of Vittoria (63339 inhabitants)
77 Km SE of Gela (75827 inhabitants)
88 Km S of Catania (314555 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 2.1 2023-09-18
01:10:05		 36.7143 14.9937 10 2023-09-18
01:18:29		 Sala Sismica INGV-Roma 121145531
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-09-18 01:10:05 ± 0.12
Latitude 36.7143 ± 0.0072
Longitude 14.9937 ± 0.0079
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 121145531

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 856
Semi-minor axis of confidence ellipse (meter) 627
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 158
Circular confidence region, given by single value of horizontal uncertainty (meter) 860.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 108
Number of associated phases, regardless of their use for origin computation 26
Number of defining phases 26
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.32
Epicentral distance of station closest to the epicenter (degree) 0.03507
Epicentral distance of station farthest from the epicenter (degree) 0.92270
Number of stations at which the event was observed 18
Number of stations from which data was used for origin computation 18
Magnitude information

ML:2.1

Field Value
Value 2.1
Uncertainty 0.2
Num. used stations 25
Type of magnitude ML
Reference to an origin 121145531
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-09-18 01:18:29
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
ML.MSDA.BHE. 2023-09-18T01:10:22.68 0.1 undecidable manual P 207 101.0211 50 0.46 76
ML.XLND.BHE. 2023-09-18T01:10:22.20 0.1 undecidable manual P 223 102.4197 50 -0.23 80
IV.HVIT.HHZ. 2023-09-18T01:10:21.99 0.3 undecidable manual S 307 52.0035 50 0.35 64
IV.HSRS.HHZ. 2023-09-18T01:10:20.89 0.3 undecidable manual S 26 46.62 50 0.7 58
IV.CROCE.HHZ. 2023-09-18T01:10:19.32 0.3 undecidable manual S 288 42.8238 50 0.14 68
IV.RAFF.HHZ. 2023-09-18T01:10:19.53 0.1 undecidable manual P 315 79.4649 50 0.65 75
IV.HAGA.HHE. 2023-09-18T01:10:16.48 0.1 undecidable manual P 13 64.8906 50 -0.17 87
IV.AGST.EHZ. 2023-09-18T01:10:16.38 0.1 undecidable manual P 19 63.5919 50 -0.07 89
IT.LNT.HGE. 2023-09-18T01:10:16.70 0.1 undecidable manual P 1 63.6918 50 0.24 86
IV.HMDC.HHZ. 2023-09-18T01:10:16.53 0.1 undecidable manual S 326 32.9448 50 -0.01 95
IV.SCIC.HHE. 2023-09-18T01:10:16.18 0.1 undecidable manual S 288 29.9478 50 0.43 88
IV.HCRL.HHE. 2023-09-18T01:10:16.44 0.1 undecidable manual P 3 63.1923 50 0.06 89
IV.HAVL.HHZ. 2023-09-18T01:10:15.58 0.1 undecidable manual S 23 29.5482 50 -0.04 95
IV.HVZN.HHZ. 2023-09-18T01:10:15.61 0.1 undecidable manual P 334 57.0984 50 0.17 88
IV.SSY.HHZ. 2023-09-18T01:10:14.46 0.1 undecidable manual P 8 49.7169 50 0.16 90
IV.ACATE.EHE. 2023-09-18T01:10:14.96 0.1 undecidable manual P 308 55.5999 50 -0.26 87
IV.HVIT.HHZ. 2023-09-18T01:10:14.09 0.1 undecidable manual P 307 52.0035 50 -0.57 81
IV.HSRS.HHZ. 2023-09-18T01:10:13.54 0.3 undecidable manual P 26 46.62 50 -0.29 66
IV.CROCE.HHZ. 2023-09-18T01:10:12.79 0.3 undecidable manual P 288 42.8238 50 -0.46 64
IV.HMDC.HHZ. 2023-09-18T01:10:11.10 0.1 undecidable manual P 326 32.9448 50 -0.62 82
IV.SCIC.HHE. 2023-09-18T01:10:11.08 0.1 undecidable manual P 288 29.9478 50 -0.18 92
IV.ISPIC.HHZ. 2023-09-18T01:10:10.45 0.1 undecidable manual S 312 10.878 134 0.08 98
IV.HAVL.HHZ. 2023-09-18T01:10:10.76 0.1 undecidable manual P 23 29.5482 50 -0.43 88
IV.HPAC.HHZ. 2023-09-18T01:10:09.35 0.3 undecidable manual S 99 3.8961 159 0.35 70
IV.HPAC.HHZ. 2023-09-18T01:10:07.39 0.1 undecidable manual P 99 3.8961 159 0.02 100
IV.ISPIC.HHZ. 2023-09-18T01:10:07.97 0.1 undecidable manual P 312 10.878 134 -0.19 96
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.HPAC.HHE. ML:2.2 0.00285 0.1 AML other m 2023-09-18T01:10:09.47
IV.HPAC.HHN. ML:2.5 0.005925 0.16 AML other m 2023-09-18T01:10:09.51
IV.ISPIC.HHE. ML:2.2 0.001701627 0.22 AML other m 2023-09-18T01:10:10.64
IV.ISPIC.HNN. ML:2.1 0.0015049999999999998 0.2 AML other m 2023-09-18T01:10:10.65
IV.ISPIC.HNE. ML:2.1 0.0016691055 0.24 AML other m 2023-09-18T01:10:10.65
IV.ISPIC.HHN. ML:2.1 0.0014570005 0.2 AML other m 2023-09-18T01:10:10.65
IV.HAVL.HHN. ML:1.9 0.000419 0.14 AML other m 2023-09-18T01:10:16.57
IV.HMDC.HHE. ML:1.7 0.00023741735 0.1 AML other m 2023-09-18T01:10:18.26
IV.HAVL.HHE. ML:1.8 0.0003480549 0.16 AML other m 2023-09-18T01:10:18.24
IV.HMDC.HHN. ML:2.0 0.00042985465 0.18 AML other m 2023-09-18T01:10:19.24
IV.SSY.HHE. ML:2.1 0.0003622035 0.34 AML other m 2023-09-18T01:10:23.37
IV.SSY.HNE. ML:2.4 0.000619 1.84 AML other m 2023-09-18T01:10:25.96
IV.SSY.HNN. ML:2.3 0.0005729999999999999 0.3 AML other m 2023-09-18T01:10:25.20
IV.SSY.HHN. ML:2.5 0.0007825 0.32 AML other m 2023-09-18T01:10:25.03
IV.HVZN.HHN. ML:0.0 0.00039275555000000003 0.4 AML other m 2023-09-18T01:10:24.99
IV.HVZN.HNN. ML:0.0 0.00049732865 0.42 AML other m 2023-09-18T01:10:25.04
IV.AGST.EHE. ML:0.0 0.00018552774999999999 0.24 AML other m 2023-09-18T01:10:28.81
IV.HVZN.HHE. ML:0.0 0.00046224665 0.36 AML other m 2023-09-18T01:10:28.03
IV.HVZN.HNE. ML:0.0 0.0004823286 0.3696 AML other m 2023-09-18T01:10:28.06
IV.AGST.EHN. ML:0.0 0.00021490445000000002 0.12 AML other m 2023-09-18T01:10:28.20
IV.RAFF.HHN. ML:2.1 0.000174 0.62 AML other m 2023-09-18T01:10:33.43
IV.RAFF.HHE. ML:1.9 0.00010675 1.52 AML other m 2023-09-18T01:10:33.09
IV.HMDC.HNE. ML:1.6 0.0001886097 0.2192 AML other m 2023-09-18T01:10:20.97
IV.RAFF.HNE. ML:1.6 0.00005065794 0.3896 AML other m 2023-09-18T01:10:32.46
IV.RAFF.HNN. ML:1.7 0.000073603495 0.6296 AML other m 2023-09-18T01:10:33.44
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