Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.2 on date 30-09-2020 and time 04:39:43 (UTC) in region 3 km NE Salemi (TP)

A magnitude ML 2.2 earthquake occured in region: 3 km NE Salemi (TP), on

  • 30-09-2020 04:39:43 (UTC)
  • 30-09-2020 06:39:43 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.8330, 12.8240 at 11 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 3 10794 10794
Vita TP 4 2056 12850
Gibellina TP 5 4115 16965
Santa Ninfa TP 8 5043 22008
Calatafimi-Segesta TP 10 6712 28720
Partanna TP 14 10607 39327
Castelvetrano TP 17 31806 71133
Salaparuta TP 18 1696 72829

Municipalities with at least 50000 inhabitants

An earthquake occurred to
29 Km NE of Mazara del Vallo (51718 inhabitants)
34 Km SE of Trapani (68759 inhabitants)
34 Km E of Marsala (83194 inhabitants)
57 Km SW of Palermo (674435 inhabitants)
66 Km W of Bagheria (55387 inhabitants)
89 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 2.2 2020-09-30
04:39:43		 37.833 12.8238 11 2021-02-26
14:55:57		 Bollettino Sismico Italiano INGV 83444511
Reviewed
Rev100 		ML 2.2 2020-09-30
04:39:43		 37.8332 12.8352 13 2020-09-30
04:50:40		 Sala Sismica INGV-Roma 83378091
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-09-30 04:39:43 ± 0.08
Latitude 37.8330 ± 0.0063
Longitude 12.8238 ± 0.0057
Depth (km) 11 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 83444511

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 659
Semi-minor axis of confidence ellipse (meter) 485
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 180
Circular confidence region, given by single value of horizontal uncertainty (meter) 660.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 54
Number of associated phases, regardless of their use for origin computation 29
Number of defining phases 29
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.34
Epicentral distance of station closest to the epicenter (degree) 0.00899
Epicentral distance of station farthest from the epicenter (degree) 0.53510
Number of stations at which the event was observed 17
Number of stations from which data was used for origin computation 17
Magnitudes information

ML:2.2

Field Value
Value 2.2
Uncertainty 0.3
Num. used stations 32
Type of magnitude ML
Reference to an origin 83378091
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-09-30 04:50:40

ML:2.2

Field Value
Value 2.2
Uncertainty 0.3
Num. used stations 30
Type of magnitude ML
Reference to an origin 83444511
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-12-28 11:45:07
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.LEVAN.EHZ. 2020-09-30T04:39:58.82 0.3 undecidable manual S 293 45.4212 50 0.43 64
IV.MPG.HHZ. 2020-09-30T04:39:55.10 0.3 undecidable manual P 52 59.3961 50 0.73 56
IV.ERC.EHZ. 2020-09-30T04:39:55.38 0.6 undecidable manual S 318 30.747 50 0.91 37
IV.MARS.EHZ. 2020-09-30T04:39:53.10 0.3 undecidable manual S 249 24.3534 50 0.32 69
IV.LEVAN.EHZ. 2020-09-30T04:39:52.64 0.3 undecidable manual P 293 45.4212 50 0.43 64
IV.CORL.HHZ. 2020-09-30T04:39:51.78 0.3 undecidable manual P 81 42.624 50 0 71
IV.CRJA.HHZ. 2020-09-30T04:39:51.14 0.6 undecidable manual S 102 16.1727 124 0.6 43
MN.CLTB.HHZ. 2020-09-30T04:39:51.82 0.3 undecidable manual P 129 44.5221 50 -0.26 67
IV.SCIAC.HHZ. 2020-09-30T04:39:51.24 0.3 undecidable manual P 145 42.7239 50 -0.57 62
IV.MBFT.HHZ. 2020-09-30T04:39:50.06 0.6 undecidable manual S 42 16.872 123 -0.69 41
IV.CAVT.HHZ. 2020-09-30T04:39:50.95 0.3 undecidable manual S 199 18.1707 121 -0.15 72
X3.T1581.EHZ. 2020-09-30T04:39:49.41 0.3 undecidable manual S 281 12.1767 132 -0.01 75
IV.ERC.EHZ. 2020-09-30T04:39:49.52 0.3 undecidable manual P 318 30.747 50 -0.43 66
IV.MFNL.HHZ. 2020-09-30T04:39:49.40 0.3 undecidable manual S 118 9.7791 138 0.55 66
X3.T1582.EHZ. 2020-09-30T04:39:49.36 0.3 undecidable manual S 203 10.4784 136 0.36 70
X3.T1573.HNZ. 2020-09-30T04:39:48.95 0.3 undecidable manual S 70 9.879 138 0.08 74
IV.MTGR.HHZ. 2020-09-30T04:39:48.01 0.3 undecidable manual S 320 8.7801 141 -0.6 65
IV.MARS.EHZ. 2020-09-30T04:39:48.81 0.1 positive manual P 249 24.3534 50 -0.16 94
IV.MMGO.HHZ. 2020-09-30T04:39:48.15 0.3 undecidable manual P 145 23.2545 50 -0.65 62
X3.T1574.HNZ. 2020-09-30T04:39:48.11 0.3 undecidable manual S 352 0.999 175 0.55 67
IV.CRJA.HHZ. 2020-09-30T04:39:47.80 0.3 undecidable manual P 102 16.1727 124 0.12 72
IV.MBFT.HHZ. 2020-09-30T04:39:47.49 0.1 positive manual P 42 16.872 123 -0.31 93
IV.CAVT.HHZ. 2020-09-30T04:39:47.62 0.3 undecidable manual P 199 18.1707 121 -0.38 68
IV.MTGR.HHZ. 2020-09-30T04:39:46.25 0.1 negative manual P 320 8.7801 141 -0.32 94
X3.T1582.EHZ. 2020-09-30T04:39:46.72 0.1 undecidable manual P 203 10.4784 136 -0.07 99
X3.T1574.HNZ. 2020-09-30T04:39:46.09 0.1 undecidable manual P 352 0.999 175 0.13 99
X3.T1581.EHZ. 2020-09-30T04:39:46.91 0.1 negative manual P 281 12.1767 132 -0.12 97
X3.T1573.HNZ. 2020-09-30T04:39:46.71 0.1 positive manual P 70 9.879 138 0 100
IV.MFNL.HHZ. 2020-09-30T04:39:46.86 0.1 negative manual P 118 9.7791 138 0.15 97
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MTGR.HHE. ML:1.9 0.0010255000000000002 0.58 AML other m 2020-09-30T04:39:48.22
IV.MTGR.HHN. ML:2.0 0.0014550000000000001 0.58 AML other m 2020-09-30T04:39:48.17
X3.T1574.HNN. ML:2.8 0.0111 0.18 AML other m 2020-09-30T04:39:48.85
X3.T1574.HHN. ML:2.8 0.011550000000000001 0.18 AML other m 2020-09-30T04:39:48.87
X3.T1574.HHE. ML:2.8 0.010539999999999999 0.96 AML other m 2020-09-30T04:39:49.15
X3.T1573.HNN. ML:2.2 0.001765 0.22 AML other m 2020-09-30T04:39:49.11
X3.T1573.HHN. ML:2.2 0.00175 0.2 AML other m 2020-09-30T04:39:49.13
X3.T1582.EHE. ML:2.8 0.00811 0.46 AML other m 2020-09-30T04:39:49.67
IV.MFNL.HHE. ML:2.4 0.002885 0.1 AML other m 2020-09-30T04:39:49.52
IV.MFNL.HHN. ML:2.3 0.00225 0.78 AML other m 2020-09-30T04:39:49.52
X3.T1574.HNE. ML:2.8 0.010324999999999999 0.94 AML other m 2020-09-30T04:39:49.14
X3.T1581.EHN. ML:2.1 0.0014 0.46 AML other m 2020-09-30T04:39:49.67
X3.T1582.EHN. ML:2.8 0.008095000000000001 1.64 AML other m 2020-09-30T04:39:50.96
IV.CRJA.HHN. ML:2.1 0.001067 0.38 AML other m 2020-09-30T04:39:51.50
IV.CRJA.HHE. ML:2.0 0.0009845 0.34 AML other m 2020-09-30T04:39:51.41
IV.CAVT.HHE. ML:2.2 0.0014199999999999998 0.54 AML other m 2020-09-30T04:39:51.65
IV.MBFT.HHN. ML:1.5 0.000247 0.22 AML other m 2020-09-30T04:39:51.87
IV.CAVT.HHN. ML:2.2 0.001265 0.34 AML other m 2020-09-30T04:39:52.01
IV.MBFT.HHE. ML:1.5 0.000282 0.48 AML other m 2020-09-30T04:39:52.83
IV.MARS.EHN. ML:2.6 0.0024249999999999996 0.22 AML other m 2020-09-30T04:39:53.38
IV.MARS.EHE. ML:2.2 0.0009845000000000001 0.22 AML other m 2020-09-30T04:39:53.40
X3.T1573.HNE. ML:2.2 0.0020150000000000003 0.26 AML other m 2020-09-30T04:39:54.38
X3.T1573.HHE. ML:2.2 0.00204 0.26 AML other m 2020-09-30T04:39:54.39
X3.T1581.EHE. ML:2.0 0.000992 0.4 AML other m 2020-09-30T04:39:55.47
MN.CLTB.HHE. ML:2.6 0.00111 0.42 AML other m 2020-09-30T04:40:02.98
IV.SCIAC.HHN. ML:1.8 0.00022499999999999997 0.7 AML other m 2020-09-30T04:40:03.38
IV.SCIAC.HHE. ML:1.8 0.000194 0.9 AML other m 2020-09-30T04:40:03.43
MN.CLTB.HHN. ML:2.9 0.002275 0.62 AML other m 2020-09-30T04:40:04.21
IV.CORL.HHE. ML:1.9 0.00027350000000000003 0.48 AML other m 2020-09-30T04:40:04.29
IV.CORL.HHN. ML:1.8 0.000203 0.54 AML other m 2020-09-30T04:40:04.70
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
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QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download
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