Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.0 on date 28-03-2023 and time 08:44:11 (Italy) in region 6 km E Menfi (AG)

A magnitude ML 2.0 earthquake occured in region: 6 km E Menfi (AG), on

  • 28-03-2023 06:44:11 (UTC)
  • 28-03-2023 08:44:11 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.5950, 13.0330 at 10 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.

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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
Menfi AG 6 12592 12592
Sambuca di Sicilia AG 9 5877 18469
Sciacca AG 11 40928 59397
Santa Margherita di Belice AG 11 6363 65760
Montevago AG 13 3006 68766
Caltabellotta AG 16 3681 72447
Salaparuta TP 18 1696 74143
Poggioreale TP 19 1494 75637
Partanna TP 19 10607 86244
Contessa Entellina PA 20 1766 88010

Municipalities with at least 50000 inhabitants

An earthquake occurred to
40 Km E of Mazara del Vallo (51718 inhabitants)
57 Km E of Marsala (83194 inhabitants)
58 Km NW of Agrigento (59770 inhabitants)
65 Km SW of Palermo (674435 inhabitants)
66 Km SE of Trapani (68759 inhabitants)
68 Km SW of Bagheria (55387 inhabitants)
92 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
Bulletin
Rev1000 		ML 2.0 2023-03-28
06:44:11		 37.5952 13.033 10 2024-03-01
17:18:10		 Bollettino Sismico Italiano INGV 118151381
Reviewed
Rev100 		ML 2.0 2023-03-28
06:44:11		 37.595 13.0318 8 2023-03-28
07:01:37		 Sala Sismica INGV-Roma 115814601
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-03-28 06:44:11 ± 0.19
Latitude 37.5952 ± 0.0099
Longitude 13.0330 ± 0.0136
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 118151381

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1395
Semi-minor axis of confidence ellipse (meter) 514
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 231
Circular confidence region, given by single value of horizontal uncertainty (meter) 1400.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 146
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) 0.36
Epicentral distance of station closest to the epicenter (degree) 0.08004
Epicentral distance of station farthest from the epicenter (degree) 0.47844
Number of stations at which the event was observed 8
Number of stations from which data was used for origin computation 8
Magnitudes information

ML:2.0

Field Value
Value 2.0
Uncertainty 0.2
Num. used stations 8
Type of magnitude ML
Reference to an origin 118151381
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2023-06-06 13:35:30

ML:2.0

Field Value
Value 2.0
Uncertainty 0.2
Num. used stations 16
Type of magnitude ML
Reference to an origin 115814601
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-03-28 07:01:37
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MBFT.HNZ. 2023-03-28T06:44:24.28 0.6 undecidable manual S 350 39.5271 50 -0.43 45
IV.CAVT.HHZ. 2023-03-28T06:44:21.39 0.3 undecidable manual S 291 26.0517 110 0.36 70
IV.MARIO.HHE. 2023-03-28T06:44:21.64 1.0 undecidable manual P 41 53.1024 50 0.47 22
IV.CRJA.HHZ. 2023-03-28T06:44:20.66 0.3 undecidable manual S 354 23.0547 113 0.61 65
IV.MFNL.HHZ. 2023-03-28T06:44:20.38 0.6 undecidable manual S 336 23.754 112 0.09 49
IV.CORL.HHE. 2023-03-28T06:44:19.24 0.3 undecidable manual P 36 40.8258 50 -0.03 73
IV.MBFT.HNZ. 2023-03-28T06:44:18.60 0.6 undecidable manual P 350 39.5271 50 -0.48 44
IV.CAVT.HHZ. 2023-03-28T06:44:17.09 0.3 undecidable manual P 291 26.0517 110 0.13 73
IV.MFNL.HHZ. 2023-03-28T06:44:16.82 0.6 undecidable manual P 336 23.754 112 0.29 47
IV.SCIAC.HHZ. 2023-03-28T06:44:16.32 0.3 undecidable manual S 145 10.6782 132 -0.05 76
IV.CRJA.HHZ. 2023-03-28T06:44:16.56 0.1 undecidable manual P 354 23.0547 113 0.17 97
IV.MMGO.HNZ. 2023-03-28T06:44:14.95 0.3 undecidable manual S 326 8.88 137 -1 57
IV.SCIAC.HHZ. 2023-03-28T06:44:14.41 0.1 negative manual P 145 10.6782 132 0.15 100
IV.MMGO.HNZ. 2023-03-28T06:44:13.69 0.1 undecidable manual P 326 8.88 137 -0.33 97
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MMGO.HHE. ML:2.0 0.0012930934999999999 0.2016 AML other m 2023-03-28T06:44:15.07
IV.MMGO.HHN. ML:2.1 0.0016467774999999998 0.2016 AML other m 2023-03-28T06:44:15.12
IV.SCIAC.HHE. ML:2.4 0.0032021655 0.1184 AML other m 2023-03-28T06:44:16.90
IV.SCIAC.HHN. ML:2.2 0.0021152379999999998 0.2016 AML other m 2023-03-28T06:44:17.22
IV.CRJA.HHN. ML:1.8 0.0004035 0.24 AML other m 2023-03-28T06:44:21.00
IV.CRJA.HHE. ML:1.9 0.000479 0.18 AML other m 2023-03-28T06:44:21.33
IV.CAVT.HHN. ML:2.0 0.0005062714999999999 1.3984 AML other m 2023-03-28T06:44:22.72
IV.CAVT.HHE. ML:1.7 0.00030976195000000003 1.28 AML other m 2023-03-28T06:44:22.05
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