Earthquake with magnitude of ML 0.9 on date 23-09-2020 and time 23:04:08 (Italy) in region 3 km SE Vita (TP)

A magnitude ML 0.9 earthquake occured in region: 3 km SE Vita (TP), on

  • 23-09-2020 21:04:08 (UTC)
  • 23-09-2020 23:04:08 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.8430, 12.8350 at 18 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
Vita TP 4 2056 2056
Salemi TP 4 10794 12850
Gibellina TP 5 4115 16965
Calatafimi-Segesta TP 8 6712 23677
Santa Ninfa TP 9 5043 28720
Partanna TP 14 10607 39327
Salaparuta TP 18 1696 41023
Castelvetrano TP 18 31806 72829
Alcamo TP 19 45307 118136
Poggioreale TP 20 1494 119630

Municipalities with at least 50000 inhabitants

An earthquake occurred to
30 Km NE of Mazara del Vallo (51718 inhabitants)
34 Km SE of Trapani (68759 inhabitants)
35 Km E of Marsala (83194 inhabitants)
55 Km SW of Palermo (674435 inhabitants)
65 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 0.9 2020-09-23
21:04:08
37.8427 12.8352 18 2021-02-26
14:56:17
Bollettino Sismico Italiano INGV 86701491
Reviewed
Rev100
ML 0.7 2020-09-23
21:04:08
37.84 12.8342 11 2020-09-23
21:42:53
Sala Sismica INGV-Roma 83170121
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-09-23 21:04:08 ± 0.34
Latitude 37.8427 ± 0.0108
Longitude 12.8352 ± 0.0102
Depth (km) 18 ± 3 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 86701491

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1116
Semi-minor axis of confidence ellipse (meter) 769
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 142
Circular confidence region, given by single value of horizontal uncertainty (meter) 1120.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 92
Number of associated phases, regardless of their use for origin computation 13
Number of defining phases 13
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.31
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.23113
Number of stations at which the event was observed 7
Number of stations from which data was used for origin computation 7
Magnitudes information

ML:0.7

Field Value
Value 0.7
Uncertainty 0.4
Num. used stations 10
Type of magnitude ML
Reference to an origin 83170121
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-09-23 21:42:53

ML:0.9

Field Value
Value 0.9
Uncertainty 0.4
Num. used stations 10
Type of magnitude ML
Reference to an origin 86701491
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-01-30 01:22:25
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MARS.EHE. 2020-09-23T21:04:18.43 0.3 undecidable manual S 247 25.6521 114 0.38 70
IV.MMGO.HHE. 2020-09-23T21:04:17.01 0.6 undecidable manual S 148 23.5542 117 -0.54 45
IV.CAVT.HHZ. 2020-09-23T21:04:16.27 0.3 undecidable manual S 201 19.4694 123 -0.32 71
IV.CRJA.HHZ. 2020-09-23T21:04:16.33 0.6 undecidable manual S 107 15.4734 131 0.57 44
IV.MBFT.HHZ. 2020-09-23T21:04:15.37 0.6 undecidable manual S 42 15.4734 131 -0.38 46
IV.MARS.EHE. 2020-09-23T21:04:14.06 0.1 undecidable manual P 247 25.6521 114 0.12 98
IV.MFNL.HHZ. 2020-09-23T21:04:14.68 0.3 undecidable manual S 127 9.5793 147 -0.03 77
IV.CAVT.HHZ. 2020-09-23T21:04:13.15 0.1 undecidable manual P 201 19.4694 123 0.05 100
IV.CRJA.HHZ. 2020-09-23T21:04:13.06 0.3 undecidable manual P 107 15.4734 131 0.45 70
IV.MMGO.HHE. 2020-09-23T21:04:13.42 0.6 undecidable manual P 148 23.5542 117 -0.22 48
IV.MFNL.HHZ. 2020-09-23T21:04:12.16 0.1 undecidable manual P 127 9.5793 147 0.15 100
IV.MBFT.HHZ. 2020-09-23T21:04:12.72 0.3 undecidable manual P 42 15.4734 131 0.11 76
IV.MTGR.HHZ. 2020-09-23T21:04:11.50 0.1 undecidable manual P -0.01 2.22
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MBFT.HNE. ML:1.1 0.00008708255500000001 0.5248 AML other m 2020-09-23T21:04:13.08
IV.MFNL.HHN. ML:0.8 0.00005715825 0.0896 AML other m 2020-09-23T21:04:14.77
IV.MFNL.HHE. ML:1.0 0.000082246425 0.1024 AML other m 2020-09-23T21:04:14.82
IV.CAVT.HHE. ML:1.4 0.00015574835 1.7792 AML other m 2020-09-23T21:04:14.05
IV.MBFT.HHE. ML:0.2 0.000009110043 0.3584 AML other m 2020-09-23T21:04:15.49
IV.MBFT.HNN. ML:1.2 0.00009885631 0.6912 AML other m 2020-09-23T21:04:17.56
IV.CRJA.HHN. ML:0.5 0.000021534705000000003 0.3584 AML other m 2020-09-23T21:04:17.34
IV.MBFT.HHN. ML:-0.1 0.0000074592335 0.6016 AML other m 2020-09-23T21:04:22.32
IV.CRJA.HHE. ML:0.6 0.0000307740835 0.6656 AML other m 2020-09-23T21:04:22.68
IV.CAVT.HHN. ML:1.2 0.00010102097500000001 0.6816 AML other m 2020-09-23T21:04:23.87
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