Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.1 on date 18-05-2023 and time 19:02:42 (UTC) in region Costa Agrigentina (Agrigento)

A magnitude ML 2.1 earthquake occured in region: Costa Agrigentina (Agrigento), on

  • 18-05-2023 19:02:42 (UTC)
  • 18-05-2023 21:02:42 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.3820, 12.9910 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
Sciacca AG 16 40928 40928

Municipalities with at least 50000 inhabitants

An earthquake occurred to
46 Km SE of Mazara del Vallo (51718 inhabitants)
53 Km W of Agrigento (59770 inhabitants)
68 Km SE of Marsala (83194 inhabitants)
82 Km SE of Trapani (68759 inhabitants)
88 Km SW of Palermo (674435 inhabitants)
90 Km SW of Bagheria (55387 inhabitants)
95 Km W of Caltanissetta (63360 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 2023-05-18
19:02:42		 37.3817 12.9913 10 2023-05-18
20:09:48		 Sala Sismica INGV-Roma 117461831
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-05-18 19:02:42 ± 0.89
Latitude 37.3817 ± 0.0396
Longitude 12.9913 ± 0.0362
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 117461831

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 4460
Semi-minor axis of confidence ellipse (meter) 3180
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 11
Circular confidence region, given by single value of horizontal uncertainty (meter) 4460.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 295
Number of associated phases, regardless of their use for origin computation 14
Number of defining phases 14
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.58
Epicentral distance of station closest to the epicenter (degree) 0.16098
Epicentral distance of station farthest from the epicenter (degree) 0.56837
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:2.1

Field Value
Value 2.1
Uncertainty 0.3
Num. used stations 16
Type of magnitude ML
Reference to an origin 117461831
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-05-18 20:09:48
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CORL.HHZ. 2023-05-18T19:03:03.91 0.6 undecidable manual S 26 63.0924 50 2.07 18
IV.MBFT.HHZ. 2023-05-18T19:03:02.43 0.3 undecidable manual S 357 62.6928 50 0.71 61
IV.MFNL.HHZ. 2023-05-18T19:02:57.31 0.6 undecidable manual S 352 45.8208 50 0.11 50
IV.CRJA.HHZ. 2023-05-18T19:02:57.72 1.0 undecidable manual S 1 46.62 50 0.3 24
IV.CORL.HHZ. 2023-05-18T19:02:55.66 0.1 undecidable manual P 26 63.0924 50 2.09 35
IV.CAVT.HHZ. 2023-05-18T19:02:55.36 0.6 undecidable manual S 328 38.9277 50 -0.02 51
IV.MBFT.HHZ. 2023-05-18T19:02:53.34 0.3 undecidable manual P 357 62.6928 50 -0.16 71
IV.MMGO.HHZ. 2023-05-18T19:02:52.05 0.6 undecidable manual S 358 31.1466 50 -1.24 34
IV.CRJA.HHZ. 2023-05-18T19:02:51.10 1.0 positive manual P 1 46.62 50 0.08 25
IV.MFNL.HHZ. 2023-05-18T19:02:51.12 0.6 negative manual P 352 45.8208 50 0.22 48
IV.CAVT.HHZ. 2023-05-18T19:02:49.73 1.0 positive manual P 328 38.9277 50 -0.12 25
IV.SCIAC.HHZ. 2023-05-18T19:02:48.31 0.6 undecidable manual S 33 17.871 119 -1.06 38
IV.MMGO.HHZ. 2023-05-18T19:02:48.05 0.1 undecidable manual P 358 31.1466 50 -0.59 90
IV.SCIAC.HHZ. 2023-05-18T19:02:46.07 0.1 positive manual P 33 17.871 119 -0.31 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SCIAC.HHE. ML:2.5 0.0024699999999999995 0.24 AML other m 2023-05-18T19:02:48.87
IV.SCIAC.HNE. ML:2.5 0.0025099999999999996 0.22 AML other m 2023-05-18T19:02:48.86
IV.SCIAC.HNN. ML:2.7 0.003785 0.14 AML other m 2023-05-18T19:02:49.21
IV.SCIAC.HHN. ML:2.6 0.0037199999999999998 0.14 AML other m 2023-05-18T19:02:49.21
IV.MMGO.HHN. ML:1.9 0.000341 0.96 AML other m 2023-05-18T19:02:54.07
IV.MMGO.HNN. ML:1.9 0.000343 0.94 AML other m 2023-05-18T19:02:54.08
IV.MMGO.HHE. ML:1.8 0.000305 0.66 AML other m 2023-05-18T19:02:54.71
IV.MMGO.HNE. ML:1.8 0.000314 0.66 AML other m 2023-05-18T19:02:54.71
IV.CRJA.HHN. ML:2.1 0.000367 0.5 AML other m 2023-05-18T19:03:00.37
IV.CRJA.HNN. ML:2.1 0.0003735 0.52 AML other m 2023-05-18T19:03:00.36
IV.CAVT.HHN. ML:2.2 0.0005164999999999999 0.6 AML other m 2023-05-18T19:03:01.50
IV.CRJA.HNE. ML:2.2 0.00040100000000000004 1.44 AML other m 2023-05-18T19:03:01.11
IV.CRJA.HHE. ML:2.1 0.0003855 1.46 AML other m 2023-05-18T19:03:01.11
IV.MFNL.HHE. ML:1.6 0.00013000000000000002 0.42 AML other m 2023-05-18T19:03:02.38
IV.MFNL.HHN. ML:1.7 0.00014450000000000002 0.32 AML other m 2023-05-18T19:03:04.59
IV.CAVT.HHE. ML:2.2 0.0005394999999999999 0.6 AML other m 2023-05-18T19:03:06.58
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