Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.9 on date 03-11-2023 and time 21:21:58 (UTC) in region Costa Siracusana (Siracusa)

A magnitude ML 1.9 earthquake occured in region: Costa Siracusana (Siracusa), on

  • 03-11-2023 21:21:58 (UTC)
  • 03-11-2023 22:21:58 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 37.2330, 15.5910 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

No Italian municipalities within 20 km distance.

Municipalities with at least 50000 inhabitants

An earthquake occurred to
33 Km NE of Siracusa (122291 inhabitants)
54 Km SE of Catania (314555 inhabitants)
57 Km SE of Acireale (52622 inhabitants)
84 Km E of Ragusa (73313 inhabitants)
85 Km NE of Modica (54633 inhabitants)
98 Km S of Reggio di Calabria (183035 inhabitants)
99 Km E 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 1.9 2023-11-03
21:21:58		 37.2327 15.5912 21 2023-11-03
21:32:09		 Sala Sismica INGV-Roma 122749561
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-11-03 21:21:58 ± 0.15
Latitude 37.2327 ± 0.0063
Longitude 15.5912 ± 0.0113
Depth (km) 21 ± 3 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 122749561

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 867
Semi-minor axis of confidence ellipse (meter) 645
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 129
Circular confidence region, given by single value of horizontal uncertainty (meter) 870.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 196
Number of associated phases, regardless of their use for origin computation 21
Number of defining phases 14
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.21
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 15
Number of stations from which data was used for origin computation 9
Magnitude information

ML:1.9

Field Value
Value 1.9
Uncertainty 0.1
Num. used stations 12
Type of magnitude ML
Reference to an origin 122749561
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-11-03 21:32:09
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.SPS2.HHZ. 2023-11-03T21:22:30.71 3.0 positive manual Pn -0.56 0
IV.RAFF.HHZ. 2023-11-03T21:22:29.22 3.0 undecidable manual S 0.25 0
IV.HMDC.HHZ. 2023-11-03T21:22:21.79 3.0 undecidable manual S -0.6 0
IV.HLNI.HHZ. 2023-11-03T21:22:18.14 3.0 undecidable manual S -1.08 0
IV.HAVL.HHZ. 2023-11-03T21:22:15.20 0.3 undecidable manual S 234 51.4152 105 0.24 69
IV.MPAZ.HHE. 2023-11-03T21:22:13.25 0.1 undecidable manual P 24 87.8454 98 -0.25 85
IV.SSY.HHZ. 2023-11-03T21:22:13.69 0.3 undecidable manual S 260 46.5201 106 -0.01 73
IV.HVZN.HHZ. 2023-11-03T21:22:12.09 3.0 positive manual P 0.53 0
IV.HPAC.HHZ. 2023-11-03T21:22:11.69 0.1 undecidable manual P 220 76.0683 99 -0.02 93
IV.HAGA.HHE. 2023-11-03T21:22:11.46 0.3 undecidable manual S 279 38.9277 110 -0.33 69
IV.HSRS.HHZ. 2023-11-03T21:22:11.07 0.3 undecidable manual S 245 36.1416 112 -0.02 75
IV.ISPIC.HHZ. 2023-11-03T21:22:11.92 3.0 negative manual P 0 0
IV.EPMN.HHE. 2023-11-03T21:22:11.99 0.1 undecidable manual P 331 74.6697 99 0.5 85
IV.AGST.EHZ. 2023-11-03T21:22:09.94 0.1 undecidable manual S 275 32.2455 115 -0.2 96
IV.HLNI.HHZ. 2023-11-03T21:22:09.68 3.0 positive manual P -0.21 0
IT.LNT.HGE. 2023-11-03T21:22:08.14 0.1 undecidable manual P 277 52.4031 104 0.02 97
IV.HAVL.HHZ. 2023-11-03T21:22:08.05 0.1 positive manual P 234 51.4152 105 0.07 95
IV.SSY.HHZ. 2023-11-03T21:22:07.14 0.1 undecidable manual P 260 46.5201 106 -0.11 95
IV.HAGA.HHE. 2023-11-03T21:22:06.06 0.1 undecidable manual P 279 38.9277 110 -0.08 97
IV.HSRS.HHZ. 2023-11-03T21:22:05.86 0.1 undecidable manual P 245 36.1416 112 0.12 97
IV.AGST.EHZ. 2023-11-03T21:22:05.20 0.1 positive manual P 275 32.2455 115 0.01 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.HAVL.HHN. ML:2.1 0.0002845 0.32 AML other m 2023-11-03T21:22:15.61
IV.HAVL.HHE. ML:1.8 0.000155307305 0.1024 AML other m 2023-11-03T21:22:15.60
IV.HLNI.HHN. ML:2.0 0.000162 0.8 AML other m 2023-11-03T21:22:18.00
IV.HLNI.HHE. ML:1.8 0.00010564999999999999 0.42 AML other m 2023-11-03T21:22:18.23
IV.AGST.EHE. ML:1.8 0.00025026848000000003 0.2176 AML other m 2023-11-03T21:22:10.14
IV.AGST.EHN. ML:1.9 0.00030263565000000005 0.7168 AML other m 2023-11-03T21:22:10.04
IV.SSY.HHE. ML:1.6 0.00011636415 1.024 AML other m 2023-11-03T21:22:14.39
IV.SSY.HHN. ML:2.0 0.00023924605 0.2432 AML other m 2023-11-03T21:22:14.18
IV.SSY.HNE. ML:1.9 0.00019707550000000001 0.2176 AML other m 2023-11-03T21:22:14.11
IV.SSY.HNN. ML:1.9 0.0002157827 0.5248 AML other m 2023-11-03T21:22:13.94
IV.HLNI.HNE. ML:2.0 0.00015648630000000003 0.9856 AML other m 2023-11-03T21:22:18.23
IV.HLNI.HNN. ML:2.0 0.00016251945 0.2688 AML other m 2023-11-03T21:22:18.01
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
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QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download