Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.5 on date 26-09-2020 and time 14:34:00 (Italy) in region 3 km NE Salemi (TP)

A magnitude ML 2.5 earthquake occured in region: 3 km NE Salemi (TP), on

  • 26-09-2020 12:34:00 (UTC)
  • 26-09-2020 14:34:00 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.8360, 12.8180 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 9 5043 22008
Calatafimi-Segesta TP 10 6712 28720
Partanna TP 14 10607 39327
Castelvetrano TP 17 31806 71133
Salaparuta TP 19 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)
67 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 2.5 2020-09-26
12:34:00		 37.8357 12.8183 11 2021-02-26
14:55:57		 Bollettino Sismico Italiano INGV 83409571
Reviewed
Rev100 		ML 2.6 2020-09-26
12:33:59		 37.8443 12.8258 13 2020-09-26
12:50:21		 Sala Sismica INGV-Roma 83270211
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-09-26 12:34:00 ± 0.09
Latitude 37.8357 ± 0.0063
Longitude 12.8183 ± 0.0068
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 83409571

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 708
Semi-minor axis of confidence ellipse (meter) 491
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 356
Circular confidence region, given by single value of horizontal uncertainty (meter) 710.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 65
Number of associated phases, regardless of their use for origin computation 27
Number of defining phases 27
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.32
Epicentral distance of station closest to the epicenter (degree) 0.00719
Epicentral distance of station farthest from the epicenter (degree) 0.53690
Number of stations at which the event was observed 16
Number of stations from which data was used for origin computation 16
Magnitudes information

ML:2.5

Field Value
Value 2.5
Uncertainty 0.4
Num. used stations 27
Type of magnitude ML
Reference to an origin 83409571
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-12-13 11:30:14

ML:2.6

Field Value
Value 2.6
Uncertainty 0.3
Num. used stations 28
Type of magnitude ML
Reference to an origin 83270211
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-09-26 12:50:21
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.ERC.EHN. 2020-09-26T12:34:12.03 0.6 undecidable manual S 318 30.1476 50 1.23 32
IV.MPG.HHE. 2020-09-26T12:34:11.62 0.6 undecidable manual P 52 59.5959 50 0.77 37
IV.MARS.EHZ. 2020-09-26T12:34:09.57 0.6 undecidable manual S 248 24.0537 50 0.41 45
MN.CLTB.HHZ. 2020-09-26T12:34:08.67 0.6 undecidable manual P 129 45.1215 50 0.05 47
IV.CORL.HHZ. 2020-09-26T12:34:08.68 0.6 undecidable manual P 81 43.0236 50 0.38 44
IV.CRJA.HHZ. 2020-09-26T12:34:07.70 0.6 undecidable manual S 103 16.7721 123 0.59 43
IV.CAVT.HHZ. 2020-09-26T12:34:07.40 0.6 undecidable manual S 198 18.2706 121 -0.16 48
IV.SCIAC.HHZ. 2020-09-26T12:34:07.72 0.6 undecidable manual P 145 43.3233 50 -0.62 41
IV.MBFT.HHZ. 2020-09-26T12:34:06.52 0.6 undecidable manual S 44 17.0718 122 -0.68 42
IV.MARS.EHZ. 2020-09-26T12:34:05.26 0.1 positive manual P 248 24.0537 50 -0.12 96
IV.ERC.EHN. 2020-09-26T12:34:05.89 0.6 undecidable manual P 318 30.1476 50 -0.43 45
IV.MFNL.HHZ. 2020-09-26T12:34:05.86 0.6 undecidable manual S 119 10.3785 136 0.46 46
X3.T1573.HHZ. 2020-09-26T12:34:05.41 0.6 undecidable manual S 73 10.2786 136 0.05 50
X3.T1581.EHZ. 2020-09-26T12:34:05.92 0.6 undecidable manual S 280 11.5773 133 0.22 48
X3.T1582.HNZ. 2020-09-26T12:34:05.78 0.6 undecidable manual S 200 10.5783 136 0.35 47
IV.MMGO.HHE. 2020-09-26T12:34:04.52 0.6 undecidable manual P 144 23.754 50 -0.81 39
IV.CAVT.HHZ. 2020-09-26T12:34:04.07 0.3 undecidable manual P 198 18.2706 121 -0.38 69
X3.T1574.HHZ. 2020-09-26T12:34:04.46 0.6 undecidable manual S 26 0.7992 176 0.51 46
IV.MTGR.HHZ. 2020-09-26T12:34:04.63 0.6 undecidable manual S 321 8.2806 143 -0.28 48
IV.CRJA.HHZ. 2020-09-26T12:34:04.22 0.1 positive manual P 103 16.7721 123 0.02 99
X3.T1573.HHZ. 2020-09-26T12:34:03.13 0.1 positive manual P 73 10.2786 136 -0.06 100
X3.T1581.EHZ. 2020-09-26T12:34:03.34 0.1 negative manual P 280 11.5773 133 -0.04 100
X3.T1582.HNZ. 2020-09-26T12:34:03.17 0.3 undecidable manual P 200 10.5783 136 -0.05 75
IV.MBFT.HHZ. 2020-09-26T12:34:03.86 0.3 undecidable manual P 44 17.0718 122 -0.39 69
IV.MFNL.HHZ. 2020-09-26T12:34:03.27 0.1 positive manual P 119 10.3785 136 0.06 100
X3.T1574.HHZ. 2020-09-26T12:34:02.53 0.1 undecidable manual P 26 0.7992 176 0.16 99
IV.MTGR.HHZ. 2020-09-26T12:34:02.64 0.1 negative manual P 321 8.2806 143 -0.28 96
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
X3.T1574.HHE. ML:3.0 0.017148159999999996 0.256 AML other m 2020-09-26T12:34:04.64
X3.T1574.HNE. ML:3.0 0.017236449999999997 0.256 AML other m 2020-09-26T12:34:04.63
IV.MTGR.HHE. ML:1.9 0.0010097321 0.1216 AML other m 2020-09-26T12:34:04.89
IV.MTGR.HHN. ML:2.3 0.0025586280000000003 0.0576 AML other m 2020-09-26T12:34:04.86
IV.MFNL.HHN. ML:2.5 0.0034150590000000002 0.0576 AML other m 2020-09-26T12:34:05.17
X3.T1574.HNN. ML:3.1 0.021998425 0.1728 AML other m 2020-09-26T12:34:05.27
X3.T1574.HHN. ML:3.1 0.022692875 0.1792 AML other m 2020-09-26T12:34:05.29
X3.T1573.HNE. ML:2.6 0.004425981 0.1664 AML other m 2020-09-26T12:34:05.55
X3.T1573.HHE. ML:2.6 0.0044593015 0.1792 AML other m 2020-09-26T12:34:05.57
X3.T1582.HNE. ML:2.4 0.0032438859999999996 0.4672 AML other m 2020-09-26T12:34:06.13
X3.T1582.EHE. ML:3.1 0.014028655000000001 0.3392 AML other m 2020-09-26T12:34:05.92
IV.MFNL.HHE. ML:2.6 0.0044081445 0.1152 AML other m 2020-09-26T12:34:05.92
X3.T1581.EHN. ML:2.3 0.0023988128 0.4224 AML other m 2020-09-26T12:34:06.09
X3.T1581.HNN. ML:1.8 0.0007562940999999999 0.4608 AML other m 2020-09-26T12:34:06.33
X3.T1582.EHN. ML:3.1 0.015866285 0.1792 AML other m 2020-09-26T12:34:06.24
IV.MBFT.HNE. ML:1.2 0.0001282283 0.448 AML other m 2020-09-26T12:34:06.73
X3.T1573.HNN. ML:2.4 0.0034172679999999998 0.1216 AML other m 2020-09-26T12:34:06.53
X3.T1573.HHN. ML:2.5 0.0034545895 0.1216 AML other m 2020-09-26T12:34:06.55
IV.MBFT.HHE. ML:1.9 0.0007403374999999999 0.2944 AML other m 2020-09-26T12:34:06.69
IV.CAVT.HHE. ML:2.6 0.003297847 0.3392 AML other m 2020-09-26T12:34:07.72
IV.CRJA.HHE. ML:2.2 0.001503381 0.32 AML other m 2020-09-26T12:34:07.85
IV.MBFT.HHN. ML:1.8 0.0005665078 0.3392 AML other m 2020-09-26T12:34:08.40
IV.CAVT.HHN. ML:2.5 0.0024742475 0.16 AML other m 2020-09-26T12:34:08.48
IV.CRJA.HHN. ML:2.3 0.001552478 0.2432 AML other m 2020-09-26T12:34:08.61
IV.MARS.EHN. ML:2.9 0.004825998000000001 0.2432 AML other m 2020-09-26T12:34:09.84
IV.MARS.EHE. ML:2.6 0.0022014145000000002 0.1984 AML other m 2020-09-26T12:34:09.85
IV.SCIAC.HHN. ML:2.2 0.0004795968 0.1984 AML other m 2020-09-26T12:34:15.45
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
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