Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.0 on date 19-08-2023 and time 21:41:56 (Italy) in region 2 km S Santa Ninfa (TP)

A magnitude ML 2.0 earthquake occured in region: 2 km S Santa Ninfa (TP), on

  • 19-08-2023 19:41:56 (UTC)
  • 19-08-2023 21:41:56 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.7610, 12.8800 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
Santa Ninfa TP 2 5043 5043
Partanna TP 4 10607 15650
Gibellina TP 6 4115 19765
Salemi TP 9 10794 30559
Salaparuta TP 11 1696 32255
Montevago AG 12 3006 35261
Castelvetrano TP 12 31806 67067
Vita TP 13 2056 69123
Poggioreale TP 14 1494 70617
Santa Margherita di Belice AG 15 6363 76980
Calatafimi-Segesta TP 17 6712 83692
Campobello di Mazara TP 18 11956 95648
Menfi AG 20 12592 108240

Municipalities with at least 50000 inhabitants

An earthquake occurred to
28 Km E of Mazara del Vallo (51718 inhabitants)
39 Km E of Marsala (83194 inhabitants)
43 Km SE of Trapani (68759 inhabitants)
58 Km SW of Palermo (674435 inhabitants)
66 Km SW of Bagheria (55387 inhabitants)
80 Km NW of Agrigento (59770 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 2.0 2023-08-19
19:41:56		 37.761 12.8797 10 2023-08-19
19:52:09		 Sala Sismica INGV-Roma 120301661
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-08-19 19:41:56 ± 0.11
Latitude 37.7610 ± 0.0063
Longitude 12.8797 ± 0.0080
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 120301661

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 669
Semi-minor axis of confidence ellipse (meter) 646
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 30
Circular confidence region, given by single value of horizontal uncertainty (meter) 670.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 86
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) 0.35
Epicentral distance of station closest to the epicenter (degree) 0.04497
Epicentral distance of station farthest from the epicenter (degree) 0.36063
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 9
Magnitude information

ML:2.0

Field Value
Value 2.0
Uncertainty 0.3
Num. used stations 30
Type of magnitude ML
Reference to an origin 120301661
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-08-19 19:52:09
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CORL.HHZ. 2023-08-19T19:42:10.62 0.3 undecidable manual S 68 40.0266 50 0.41 65
IV.SCIAC.HHZ. 2023-08-19T19:42:08.02 0.3 undecidable manual S 144 33.4443 50 -0.43 67
IV.MARS.HHZ. 2023-08-19T19:42:07.17 0.6 undecidable manual S 268 27.6501 109 0.3 46
IV.MBFT.HHZ. 2023-08-19T19:42:04.34 0.3 undecidable manual S 17 21.5673 114 -0.55 66
IV.CORL.HHZ. 2023-08-19T19:42:04.67 0.6 negative manual P 68 40.0266 50 0.16 46
IV.MTGR.HHZ. 2023-08-19T19:42:03.36 0.3 undecidable manual S 324 18.0708 118 -0.46 68
IV.SCIAC.HHZ. 2023-08-19T19:42:03.07 0.3 negative manual P 144 33.4443 50 -0.43 67
IV.CAVT.HHZ. 2023-08-19T19:42:03.09 0.6 undecidable manual S 230 14.1747 124 0.44 46
IV.MMGO.HHZ. 2023-08-19T19:42:02.15 0.3 undecidable manual S 142 13.875 124 -0.43 69
IV.CRJA.HHZ. 2023-08-19T19:42:02.03 0.3 undecidable manual S 68 11.7771 129 0.04 76
IV.MARS.HHZ. 2023-08-19T19:42:02.64 0.1 positive manual P 268 27.6501 109 0.06 97
IV.MBFT.HHZ. 2023-08-19T19:42:01.25 0.6 negative manual P 17 21.5673 114 -0.19 48
IV.MFNL.HHZ. 2023-08-19T19:42:00.32 0.1 undecidable manual S 49 4.995 152 -0.14 99
IV.CRJA.HHZ. 2023-08-19T19:42:00.45 0.1 undecidable manual P 68 11.7771 129 0.69 85
IV.MTGR.HHZ. 2023-08-19T19:42:00.75 0.1 negative manual P 324 18.0708 118 -0.07 99
IV.MMGO.HHZ. 2023-08-19T19:42:00.08 0.1 undecidable manual P 142 13.875 124 -0.03 100
IV.CAVT.HHZ. 2023-08-19T19:42:00.28 1.0 undecidable manual P 230 14.1747 124 0.13 25
IV.MFNL.HHZ. 2023-08-19T19:41:59.51 0.1 undecidable manual P 49 4.995 152 0.63 88
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MFNL.HHN. ML:2.1 0.00236 0.08 AML other m 2023-08-19T19:42:01.90
IV.MFNL.HHE. ML:2.2 0.002815 0.38 AML other m 2023-08-19T19:42:01.76
IV.MMGO.HNE. ML:2.4 0.002415 0.22 AML other m 2023-08-19T19:42:02.41
IV.MMGO.HHE. ML:2.4 0.00246 0.22 AML other m 2023-08-19T19:42:02.41
IV.MMGO.HHN. ML:2.3 0.0021000000000000003 0.22 AML other m 2023-08-19T19:42:02.40
IV.MMGO.HNN. ML:2.3 0.002105 0.24 AML other m 2023-08-19T19:42:02.41
IV.CAVT.HNN. ML:2.0 0.0011945 0.2 AML other m 2023-08-19T19:42:03.23
IV.CAVT.HHN. ML:2.4 0.00242 0.2 AML other m 2023-08-19T19:42:03.23
IV.CRJA.HHN. ML:2.0 0.0011400000000000002 0.38 AML other m 2023-08-19T19:42:03.78
IV.CRJA.HNN. ML:2.0 0.0011400000000000002 0.36 AML other m 2023-08-19T19:42:03.78
IV.CAVT.HNE. ML:2.0 0.0010455 0.28 AML other m 2023-08-19T19:42:03.74
IV.CAVT.HHE. ML:2.3 0.002075 0.26 AML other m 2023-08-19T19:42:03.75
IV.CRJA.HNE. ML:1.7 0.0006445000000000001 0.64 AML other m 2023-08-19T19:42:03.54
IV.CRJA.HHE. ML:1.7 0.00063 0.66 AML other m 2023-08-19T19:42:03.53
IV.MBFT.HHE. ML:1.4 0.000176 1.62 AML other m 2023-08-19T19:42:04.86
IV.MBFT.HHN. ML:1.4 0.000178 1.24 AML other m 2023-08-19T19:42:05.93
IV.MTGR.HHE. ML:1.5 0.00023349999999999998 0.36 AML other m 2023-08-19T19:42:05.62
IV.MTGR.HHN. ML:1.6 0.000323 0.98 AML other m 2023-08-19T19:42:05.29
IV.MARS.HHN. ML:2.0 0.0005985000000000001 0.16 AML other m 2023-08-19T19:42:07.49
IV.MARS.HNN. ML:2.0 0.0005955 0.16 AML other m 2023-08-19T19:42:07.49
IV.MARS.HHE. ML:1.8 0.0003075 0.96 AML other m 2023-08-19T19:42:08.28
IV.MARS.HNE. ML:1.8 0.0003155 0.96 AML other m 2023-08-19T19:42:08.28
IV.SCIAC.HHE. ML:1.9 0.0003645 1.52 AML other m 2023-08-19T19:42:08.87
IV.SCIAC.HNE. ML:1.9 0.000371 1.52 AML other m 2023-08-19T19:42:08.11
IV.SCIAC.HHN. ML:1.9 0.0003255 0.16 AML other m 2023-08-19T19:42:09.58
IV.SCIAC.HNN. ML:1.9 0.000325 0.16 AML other m 2023-08-19T19:42:09.59
IV.CORL.HHN. ML:2.0 0.000316 0.24 AML other m 2023-08-19T19:42:12.58
IV.CORL.HNE. ML:2.0 0.00031 0.76 AML other m 2023-08-19T19:42:13.00
IV.CORL.HHE. ML:1.9 0.000294 1.76 AML other m 2023-08-19T19:42:13.01
IV.CORL.HNN. ML:2.0 0.00032 1.12 AML other m 2023-08-19T19:42:13.67
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