Earthquake with magnitude of ML 2.0 on date 18-09-2021 and time 12:22:00 (UTC) in region Costa Siciliana nord occidentale (Trapani)

A magnitude ML 2.0 earthquake occured in region: Costa Siciliana nord occidentale (Trapani), on

  • 18-09-2021 12:22:00 (UTC)
  • 18-09-2021 14:22:00 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 38.3070, 12.6210 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.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
San Vito Lo Capo TP 18 4654 4654

Municipalities with at least 50000 inhabitants

An earthquake occurred to
33 Km N of Trapani (68759 inhabitants)
59 Km N of Marsala (83194 inhabitants)
68 Km W of Palermo (674435 inhabitants)
73 Km N of Mazara del Vallo (51718 inhabitants)
82 Km W of Bagheria (55387 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 2021-09-18
12:22:00
38.3068 12.621 10 2022-03-30
13:04:07
Bollettino Sismico Italiano INGV 95777561
Reviewed
Rev100
ML 2.1 2021-09-18
12:22:00
38.3582 12.6232 10 2021-09-18
12:47:47
Sala Sismica INGV-Roma 95586481
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-18 12:22:00 ± 0.53
Latitude 38.3068 ± 0.0288
Longitude 12.6210 ± 0.0229
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 95777561

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 3480
Semi-minor axis of confidence ellipse (meter) 1470
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 335
Circular confidence region, given by single value of horizontal uncertainty (meter) 3480.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 249
Number of associated phases, regardless of their use for origin computation 15
Number of defining phases 15
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.49
Epicentral distance of station closest to the epicenter (degree) 0.27070
Epicentral distance of station farthest from the epicenter (degree) 1.18890
Number of stations at which the event was observed 10
Number of stations from which data was used for origin computation 10
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 95777561
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-03-01 16:12:31

ML:2.1

Field Value
Value 2.1
Uncertainty 0.2
Num. used stations 8
Type of magnitude ML
Reference to an origin 95586481
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-09-18 12:47:47
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.SOLUN.HHE. 2021-09-18T12:22:24.98 0.6 undecidable manual S 106 82.9503 50 -0.14 60
IV.CSLB.HHZ. 2021-09-18T12:22:21.28 0.3 undecidable manual P 108 131.9679 50 -0.88 65
IV.MPG.HHE. 2021-09-18T12:22:20.99 0.6 undecidable manual S 104 66.378 50 0.3 60
IV.SCIAC.HHZ. 2021-09-18T12:22:18.37 0.6 undecidable manual P 154 97.2249 50 1.55 33
IV.SCIAR.HNE. 2021-09-18T12:22:18.46 0.3 undecidable manual P 112 106.5156 50 0.21 85
IV.MBFT.HHZ. 2021-09-18T12:22:15.97 0.3 undecidable manual S 144 49.4172 50 -0.2 96
IV.MMGO.HHZ. 2021-09-18T12:22:15.19 0.3 undecidable manual P 156 77.9664 50 1.34 58
IV.SOLUN.HHE. 2021-09-18T12:22:14.35 0.3 undecidable manual P 106 82.9503 50 -0.27 88
IV.LEVAN.EHE. 2021-09-18T12:22:14.34 0.6 undecidable manual S 215 42.4242 50 0.04 67
IV.MPG.HHE. 2021-09-18T12:22:12.18 0.3 undecidable manual P 104 66.378 50 0.12 94
IV.CRJA.HHZ. 2021-09-18T12:22:12.86 0.3 undecidable manual P 149 65.2902 50 0.96 72
IV.ERC.EHE. 2021-09-18T12:22:10.58 0.6 undecidable manual S 186 30.0477 50 -0.41 63
IV.MBFT.HHZ. 2021-09-18T12:22:08.44 0.3 undecidable manual P 144 49.4172 50 -1.01 72
IV.LEVAN.EHE. 2021-09-18T12:22:08.34 0.3 undecidable manual P 215 42.4242 50 -0.04 100
IV.ERC.EHE. 2021-09-18T12:22:06.08 0.3 undecidable manual P 186 30.0477 50 -0.38 95
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MBFT.HHE. ML:2.0 0.0002816927 0.16 AML other m 2021-09-18T12:22:16.83
IV.MBFT.HHN. ML:2.1 0.00032293645000000006 0.64 AML other m 2021-09-18T12:22:18.14
IV.CRJA.HHE. ML:2.2 0.00030881235 0.5248 AML other m 2021-09-18T12:22:25.27
IV.CRJA.HHN. ML:2.1 0.00025309925 0.48 AML other m 2021-09-18T12:22:27.10
IV.MMGO.HHN. ML:1.8 0.00008096859500000001 0.4992 AML other m 2021-09-18T12:22:29.11
IV.MMGO.HHE. ML:1.8 0.00008649999999999999 0.34 AML other m 2021-09-18T12:22:31.40
IV.SCIAC.HHE. ML:2.0 0.00010323585499999998 0.6016 AML other m 2021-09-18T12:22:38.51
IV.SCIAC.HHN. ML:2.0 0.00010762765000000001 0.5408 AML other m 2021-09-18T12:22:42.65
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
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