Earthquake with magnitude of ML 1.6 on date 25-09-2020 and time 11:56:02 (UTC) in region 2 km S Vita (TP)

A magnitude ML 1.6 earthquake occured in region: 2 km S Vita (TP), on

  • 25-09-2020 11:56:02 (UTC)
  • 25-09-2020 13:56:02 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.85, 12.82 at 14 km depth.

The earthquake was located by: Sala Sismica INGV-Roma.

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 2 2056 2056
Salemi TP 4 10794 12850
Gibellina TP 7 4115 16965
Calatafimi-Segesta TP 8 6712 23677
Santa Ninfa TP 10 5043 28720
Partanna TP 16 10607 39327
Alcamo TP 19 45307 84634
Castelvetrano TP 20 31806 116440
Salaparuta TP 20 1696 118136
Buseto Palizzolo TP 20 2957 121093
Castellammare del Golfo TP 20 15394 136487

Municipalities with at least 50000 inhabitants

An earthquake occurred to
30 Km NE of Mazara del Vallo (51718 inhabitants)
32 Km SE of Trapani (68759 inhabitants)
34 Km E of Marsala (83194 inhabitants)
56 Km SW of Palermo (674435 inhabitants)
66 Km W of Bagheria (55387 inhabitants)
91 Km NW of Agrigento (59770 inhabitants)
Recent and historical Seismicity
Seismic hazard
Shakemap
Felt maps
The earthquake effects in MCS scale as obtained from the compiled questionnaire

The earthquake effects in MCS scale as obtained from the compiled questionnaire

This map shows the distribution of the effects of the earthquake on the territory in terms of the MCS (Mercalli-Cancani-Sieberg) intensity scale. The intensities are determined using the data provided in the questionnaire (http://www.haisentitoilterremoto.it/) that are analysed using robust statistical techniques since they are not verified individually. Specifically, the assignment of MCS intensities greater or equal the VI degree of the MCS scale require opportune in situ verification by professional experts. The purple start shows the epicenter. This map is prepared every so often that the population fill in new questionnaires. The number of questionnaires used to determine the map and the date and time of the last adjournment are shown in the upper right part of the panel.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100
ML 1.6 2020-09-25
11:56:02
37.85 12.82 14 2020-09-25
12:02:56
Sala Sismica INGV-Roma 83238101
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-09-25 11:56:02 ± 0.18
Latitude 37.85 ± 0.01
Longitude 12.82 ± 0.01
Depth (km) 14 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 83238101

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 952
Semi-minor axis of confidence ellipse (meter) 579
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 329
Circular confidence region, given by single value of horizontal uncertainty (meter) 950
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 140
Number of associated phases, regardless of their use for origin computation 11
Number of defining phases 11
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.2
Epicentral distance of station closest to the epicenter (degree) 0.01259
Epicentral distance of station farthest from the epicenter (degree) 0.22393
Number of stations at which the event was observed 6
Number of stations from which data was used for origin computation 6
Magnitude information

ML:1.6

Field Value
Value 1.6
Uncertainty 0.1
Num. used stations 4
Type of magnitude ML
Reference to an origin 83238101
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-09-25 12:02:56
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.MARS.EHZ. 2020-09-25T11:56:11.74 1.0 undecidable manual S 243 0.2239 101 0.47 22
IV.CRJA.HHZ. 2020-09-25T11:56:09.74 0.6 undecidable manual S 110 0.1565 112 0.4 46
IV.MBFT.HHZ. 2020-09-25T11:56:08.82 0.3 undecidable manual S 49 0.1412 116 -0.09 71
X3.T1582.EHZ. 2020-09-25T11:56:07.88 0.3 undecidable manual S 196 0.1124 125 -0.32 70
IV.MARS.EHZ. 2020-09-25T11:56:07.42 0.6 undecidable manual P 243 0.2239 101 0.03 48
IV.CRJA.HHZ. 2020-09-25T11:56:06.46 0.3 undecidable manual P 110 0.1565 112 0.18 71
X3.T1574.HHZ. 2020-09-25T11:56:06.71 0.3 undecidable manual S 165 0.0126 173 0.09 74
X3.T1581.EHZ. 2020-09-25T11:56:05.42 0.6 undecidable manual P 269 0.1025 129 -0.06 49
IV.MBFT.HHZ. 2020-09-25T11:56:05.79 0.6 undecidable manual P 49 0.1412 116 -0.25 46
X3.T1582.EHZ. 2020-09-25T11:56:05.50 0.1 undecidable manual P 196 0.1124 125 -0.12 97
X3.T1574.HHZ. 2020-09-25T11:56:04.75 0.1 undecidable manual P 165 0.0126 173 0.04 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
X3.T1574.HHE. ML:1.7 0.00068620105 0.256 AML other m 2020-09-25T11:56:07.84
X3.T1574.HHN. ML:1.6 0.0005289006 0.1792 AML other m 2020-09-25T11:56:08.37
X3.T1574.HNE. ML:1.7 0.0006512614 0.1536 AML other m 2020-09-25T11:56:07.89
X3.T1574.HNN. ML:1.6 0.0005519074 0.1728 AML other m 2020-09-25T11:56:08.27
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download