Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.0 on date 09-09-2020 and time 20:22:18 (UTC) in region 2 km E Salemi (TP)

A magnitude ML 2.0 earthquake occured in region: 2 km E Salemi (TP), on

  • 09-09-2020 20:22:18 (UTC)
  • 09-09-2020 22:22:18 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.8110, 12.8280 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
Salemi TP 2 10794 10794
Gibellina TP 4 4115 14909
Santa Ninfa TP 6 5043 19952
Vita TP 7 2056 22008
Partanna TP 11 10607 32615
Calatafimi-Segesta TP 12 6712 39327
Castelvetrano TP 15 31806 71133
Salaparuta TP 17 1696 72829
Montevago AG 19 3006 75835
Poggioreale TP 19 1494 77329

Municipalities with at least 50000 inhabitants

An earthquake occurred to
27 Km NE of Mazara del Vallo (51718 inhabitants)
35 Km E of Marsala (83194 inhabitants)
36 Km SE of Trapani (68759 inhabitants)
58 Km SW of Palermo (674435 inhabitants)
67 Km W of Bagheria (55387 inhabitants)
87 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
Bulletin
Rev1000 		ML 2.0 2020-09-09
20:22:18		 37.8107 12.8282 10 2021-02-26
14:55:56		 Bollettino Sismico Italiano INGV 83267551
Reviewed
Rev100 		ML 2.1 2020-09-09
20:22:18		 37.837 12.8163 10 2020-09-09
20:35:21		 Sala Sismica INGV-Roma 82772591
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-09-09 20:22:18 ± 0.13
Latitude 37.8107 ± 0.0090
Longitude 12.8282 ± 0.0091
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 83267551

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 922
Semi-minor axis of confidence ellipse (meter) 655
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 171
Circular confidence region, given by single value of horizontal uncertainty (meter) 920.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 76
Number of associated phases, regardless of their use for origin computation 33
Number of defining phases 22
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.46
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.97846
Number of stations at which the event was observed 23
Number of stations from which data was used for origin computation 13
Magnitudes information

ML:2.0

Field Value
Value 2.0
Uncertainty 0.3
Num. used stations 14
Type of magnitude ML
Reference to an origin 83267551
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-01-25 00:56:01

ML:2.1

Field Value
Value 2.1
Uncertainty 0.3
Num. used stations 21
Type of magnitude ML
Reference to an origin 82772591
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-09-09 20:35:21
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.LAV9.HHZ. 2020-09-09T20:24:16.22 3.0 undecidable manual Sg 11.43 0
GU.CARD.HHZ. 2020-09-09T20:24:15.10 3.0 negative manual Pg 21.17 0
GU.GSCL.HHZ. 2020-09-09T20:24:13.51 3.0 undecidable manual Pg 15.59 0
IV.FIR.HHZ. 2020-09-09T20:24:03.30 3.0 undecidable manual Pg 14.6 0
AC.VLO.HHZ. 2020-09-09T20:24:00.81 3.0 negative manual Pg 15.42 0
IV.CMPR.HHZ. 2020-09-09T20:23:57.20 3.0 undecidable manual Sg 9.48 0
IV.VITU.HHZ. 2020-09-09T20:23:56.03 3.0 undecidable manual Sn -3.54 0
IV.BRSN.EHZ. 2020-09-09T20:23:52.26 3.0 negative manual Pn -2.17 0
XK.GIZZ.HHZ. 2020-09-09T20:23:41.07 3.0 undecidable manual Sn -0.24 0
IV.ROSPO.HHZ. 2020-09-09T20:23:29.91 3.0 undecidable manual Pn -0.08 0
IV.CMPR.HHZ. 2020-09-09T20:23:14.08 3.0 undecidable manual Pg 5.3 0
IV.CSLB.HHZ. 2020-09-09T20:22:38.08 0.3 undecidable manual P 82 108.6135 50 1.06 46
IV.SCIAR.HHZ. 2020-09-09T20:22:34.19 0.3 undecidable manual P 80 81.9513 50 1.28 43
IV.LEVAN.EHN. 2020-09-09T20:22:33.58 0.6 undecidable manual S 296 46.7199 50 -0.31 45
IV.SCIAC.HHZ. 2020-09-09T20:22:31.73 0.6 undecidable manual S 144 40.5261 50 -0.5 44
IV.ERC.EHE. 2020-09-09T20:22:30.47 0.6 undecidable manual S 320 32.8449 50 0.29 47
IV.MPG.HHE. 2020-09-09T20:22:29.70 0.3 undecidable manual P 50 60.5949 50 0.07 70
IV.MARS.EHZ. 2020-09-09T20:22:28.02 0.1 undecidable manual S 255 23.9538 113 0.24 96
IV.LEVAN.EHN. 2020-09-09T20:22:27.57 0.3 undecidable manual P 296 46.7199 50 0.08 71
IV.MMGO.HHE. 2020-09-09T20:22:26.29 0.6 undecidable manual S 142 21.0678 116 -0.56 44
MN.CLTB.HHZ. 2020-09-09T20:22:26.91 0.6 undecidable manual P 127 42.7239 50 0.04 48
IV.ERC.EHE. 2020-09-09T20:22:25.67 0.3 undecidable manual P 320 32.8449 50 0.33 70
IV.CAVT.HHZ. 2020-09-09T20:22:25.70 0.3 undecidable manual S 204 15.9729 123 0.39 94
IV.CRJA.HHZ. 2020-09-09T20:22:25.52 0.6 undecidable manual S 94 15.4734 123 0.35 48
IV.SCIAC.HHZ. 2020-09-09T20:22:25.95 0.1 undecidable manual P 144 40.5261 50 -0.58 85
IV.MFNL.HHZ. 2020-09-09T20:22:24.22 0.3 undecidable manual S 105 8.5803 140 0.86 60
IV.MBFT.HHZ. 2020-09-09T20:22:24.94 0.6 undecidable manual S 36 18.5703 119 -1.17 34
IV.MARS.EHZ. 2020-09-09T20:22:23.55 0.1 positive manual P 255 23.9538 113 -0.42 92
IV.MMGO.HHE. 2020-09-09T20:22:22.94 0.1 undecidable manual P 142 21.0678 116 -0.49 91
IV.MBFT.HHZ. 2020-09-09T20:22:22.24 0.1 positive manual P 36 18.5703 119 -0.76 83
IV.CRJA.HHZ. 2020-09-09T20:22:22.57 0.1 positive manual P 94 15.4734 123 0.11 100
IV.CAVT.HHZ. 2020-09-09T20:22:22.41 0.1 undecidable manual P 204 15.9729 123 -0.14 99
IV.MFNL.HHZ. 2020-09-09T20:22:21.63 0.1 positive manual P 105 8.5803 140 0.22 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MFNL.HHE. ML:2.1 0.0018113964999999998 0.4864 AML other m 2020-09-09T20:22:23.43
IV.MFNL.HHN. ML:2.1 0.0017698535 0.3584 AML other m 2020-09-09T20:22:23.17
IV.CAVT.HHE. ML:2.4 0.002343528 1.6032 AML other m 2020-09-09T20:22:25.04
IV.CAVT.HHN. ML:2.0 0.0010270296999999999 0.2432 AML other m 2020-09-09T20:22:26.03
IV.CRJA.HHE. ML:1.9 0.00080883385 0.128 AML other m 2020-09-09T20:22:26.22
IV.MBFT.HHN. ML:1.8 0.0004732946 0.4608 AML other m 2020-09-09T20:22:26.76
IV.MBFT.HHE. ML:1.7 0.00038451840000000006 0.3456 AML other m 2020-09-09T20:22:26.75
IV.MARS.EHN. ML:2.3 0.0013305150000000002 0.1792 AML other m 2020-09-09T20:22:28.11
IV.MARS.EHE. ML:2.0 0.0006268277 0.1408 AML other m 2020-09-09T20:22:28.36
IV.SCIAC.HHE. ML:1.9 0.0002495107 0.1408 AML other m 2020-09-09T20:22:32.84
IV.SCIAC.HHN. ML:1.8 0.0002178753 0.4608 AML other m 2020-09-09T20:22:33.31
MN.CLTB.HHE. ML:2.7 0.0017363629999999999 0.8192 AML other m 2020-09-09T20:22:34.75
IV.CSLB.HHE. ML:1.5 0.00003223931 0.5504 AML other m 2020-09-09T20:22:55.72
IV.CSLB.HHN. ML:1.7 0.000044999999999999996 1.4 AML other m 2020-09-09T20:22:55.05
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