Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.7 on date 24-01-2023 and time 04:40:05 (Italy) in region Costa Siracusana (Siracusa)

A magnitude ML 1.7 earthquake occured in region: Costa Siracusana (Siracusa), on

  • 24-01-2023 03:40:05 (UTC)
  • 24-01-2023 04:40:05 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 36.9520, 15.3340 at 21 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

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.

Hai sentito il terremoto? Clicca qui

Did you feel it? Fill in the questionnaire.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Siracusa SR 13 122291 122291
Avola SR 18 31708 153999

Municipalities with at least 50000 inhabitants

An earthquake occurred to
13 Km S of Siracusa (122291 inhabitants)
52 Km E of Modica (54633 inhabitants)
54 Km E of Ragusa (73313 inhabitants)
65 Km SE of Catania (314555 inhabitants)
71 Km E of Vittoria (63339 inhabitants)
75 Km S of Acireale (52622 inhabitants)
97 Km E 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
Bulletin
Rev1000 		ML 1.7 2023-01-24
03:40:05		 36.9518 15.3338 21 2024-03-01
17:17:55		 Bollettino Sismico Italiano INGV 114413581
Reviewed
Rev100 		ML 1.6 2023-01-24
03:40:05		 36.9453 15.3533 15 2023-01-24
03:45:34		 Sala Sismica INGV-Roma 113754181
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-01-24 03:40:05 ± 0.09
Latitude 36.9518 ± 0.0018
Longitude 15.3338 ± 0.0068
Depth (km) 21 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 114413581

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 447
Semi-minor axis of confidence ellipse (meter) 396
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 273
Circular confidence region, given by single value of horizontal uncertainty (meter) 450.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 240
Number of associated phases, regardless of their use for origin computation 18
Number of defining phases 18
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.1
Epicentral distance of station closest to the epicenter (degree) 0.11062
Epicentral distance of station farthest from the epicenter (degree) 0.54049
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 9
Magnitudes information

ML:1.7

Field Value
Value 1.7
Uncertainty 0.1
Num. used stations 4
Type of magnitude ML
Reference to an origin 114413581
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2023-08-21 14:08:27

ML:1.6

Field Value
Value 1.6
Uncertainty 0.1
Num. used stations 4
Type of magnitude ML
Reference to an origin 113754181
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-01-24 03:45:34
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.HLNI.HHZ. 2023-01-24T03:40:23.71 0.6 undecidable manual S 317 59.9955 101 -0.13 45
IV.HCRL.HHZ. 2023-01-24T03:40:20.30 0.6 undecidable manual S 324 45.4212 106 0.26 45
IV.HPAC.HHE. 2023-01-24T03:40:18.34 0.6 undecidable manual S 224 37.7289 110 0.25 45
IV.HAGA.HHZ. 2023-01-24T03:40:18.77 0.6 undecidable manual S 337 40.2264 108 0.06 47
IV.AGST.EHZ. 2023-01-24T03:40:17.47 0.6 undecidable manual S 344 35.0427 112 0.04 48
IV.SSY.HHZ. 2023-01-24T03:40:16.97 0.6 undecidable manual S 315 32.4453 114 0.19 47
IV.HLNI.HHZ. 2023-01-24T03:40:15.72 0.3 undecidable manual P 317 59.9955 101 -0.2 66
IV.HCRL.HHZ. 2023-01-24T03:40:13.75 0.3 undecidable manual P 324 45.4212 106 0.02 71
IV.HAVL.HHZ. 2023-01-24T03:40:13.48 0.6 undecidable manual S 273 18.7701 131 -0.2 48
IV.HSRS.HHZ. 2023-01-24T03:40:13.54 0.6 undecidable manual S 328 18.4704 132 -0.08 49
IV.HAGA.HHZ. 2023-01-24T03:40:12.98 0.3 undecidable manual P 337 40.2264 108 0.02 71
IV.HPAC.HHE. 2023-01-24T03:40:12.59 0.1 undecidable manual P 224 37.7289 110 -0.01 96
IV.AGST.EHZ. 2023-01-24T03:40:12.23 0.1 negative manual P 344 35.0427 112 0.01 96
1J.FX01.HHN. 2023-01-24T03:40:12.58 0.6 undecidable manual S 344 12.2766 144 0.07 49
IV.SSY.HHZ. 2023-01-24T03:40:11.90 0.3 undecidable manual P 315 32.4453 114 0.06 72
1J.FX01.HHN. 2023-01-24T03:40:09.37 0.1 undecidable manual P 344 12.2766 144 -0.01 100
IV.HAVL.HHZ. 2023-01-24T03:40:09.95 0.1 undecidable manual P 273 18.7701 131 -0.11 97
IV.HSRS.HHZ. 2023-01-24T03:40:09.96 0.3 undecidable manual P 328 18.4704 132 -0.06 74
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.HAVL.HHN. ML:1.6 0.00020649999999999998 0.24 AML other m 2023-01-24T03:40:13.78
IV.HAVL.HHE. ML:1.6 0.00021349999999999999 0.24 AML other m 2023-01-24T03:40:13.91
IV.SSY.HHE. ML:1.7 0.000179 1.24 AML other m 2023-01-24T03:40:18.72
IV.SSY.HHN. ML:1.8 0.00026000000000000003 0.42 AML other m 2023-01-24T03:40:25.63
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