Earthquake with magnitude of ML 1.5 on date 07-10-2021 and time 17:30:04 (Italy) in region 2 km S Salaparuta (TP)

A magnitude ML 1.5 earthquake occured in region: 2 km S Salaparuta (TP), on

  • 07-10-2021 15:30:04 (UTC)
  • 07-10-2021 17:30:04 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.737, 13.009 at 11 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
Salaparuta TP 2 1696 1696
Poggioreale TP 4 1494 3190
Montevago AG 4 3006 6196
Santa Margherita di Belice AG 5 6363 12559
Partanna TP 11 10607 23166
Santa Ninfa TP 12 5043 28209
Sambuca di Sicilia AG 13 5877 34086
Gibellina TP 15 4115 38201
Contessa Entellina PA 16 1766 39967
Menfi AG 16 12592 52559
Roccamena PA 17 1505 54064
Camporeale PA 20 3373 57437

Municipalities with at least 50000 inhabitants

An earthquake occurred to
38 Km E of Mazara del Vallo (51718 inhabitants)
51 Km E of Marsala (83194 inhabitants)
52 Km SW of Palermo (674435 inhabitants)
54 Km SE of Trapani (68759 inhabitants)
58 Km SW of Bagheria (55387 inhabitants)
70 Km NW of Agrigento (59770 inhabitants)
97 Km W of Caltanissetta (63360 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Preliminary map of the earthquake effects from the web questionnaire

Preliminary map of the earthquake effects from the web 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 1.5 2021-10-07
15:30:04
37.7372 13.0092 11 2021-10-07
15:39:38
Sala Sismica INGV-Roma 96323621
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-07 15:30:04 ± 0.17
Latitude 37.7372 ± 0.0090
Longitude 13.0092 ± 0.0193
Depth (km) 11 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 96323621

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1780
Semi-minor axis of confidence ellipse (meter) 731
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 247
Circular confidence region, given by single value of horizontal uncertainty (meter) 1780
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 146
Number of associated phases, regardless of their use for origin computation 12
Number of defining phases 12
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.35
Epicentral distance of station closest to the epicenter (degree) 0.07914
Epicentral distance of station farthest from the epicenter (degree) 0.35163
Number of stations at which the event was observed 7
Number of stations from which data was used for origin computation 7
Magnitude information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.4
Num. used stations 12
Type of magnitude ML
Reference to an origin 96323621
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-07 15:39:38
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.MARS.HHE. 2021-10-07T15:30:17.51 0.6 undecidable manual S 273 0.3516 50 0.41 44
IV.SCIAC.HHZ. 2021-10-07T15:30:13.78 0.3 undecidable manual S 162 0.2329 50 0.2 70
IV.MBFT.HHZ. 2021-10-07T15:30:12.65 0.3 undecidable manual S 348 0.2131 50 -0.36 68
IV.MARS.HHE. 2021-10-07T15:30:11.61 0.6 undecidable manual P 273 0.3516 50 -0.03 47
MN.CLTB.HHZ. 2021-10-07T15:30:10.24 0.6 undecidable manual P 134 0.2284 50 0.7 41
IV.SCIAC.HHZ. 2021-10-07T15:30:09.54 0.3 undecidable manual P 162 0.2329 50 -0.07 72
IV.MBFT.HHZ. 2021-10-07T15:30:09.19 0.3 undecidable manual P 348 0.2131 50 -0.09 72
IV.MTGR.HHZ. 2021-10-07T15:30:09.44 0.3 undecidable manual P 308 0.2518 50 -0.49 66
IV.MFNL.HHZ. 2021-10-07T15:30:09.69 0.3 undecidable manual S 308 0.0872 138 0.46 68
IV.MMGO.HNZ. 2021-10-07T15:30:08.54 0.1 undecidable manual S 199 0.0791 141 -0.5 90
IV.MFNL.HHZ. 2021-10-07T15:30:07.37 0.1 undecidable manual P 308 0.0872 138 0.28 95
IV.MMGO.HNZ. 2021-10-07T15:30:06.97 0.1 negative manual P 199 0.0791 141 -0.02 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MMGO.HHE. ML:2.1 0.001575 0.08 AML other m 2021-10-07T15:30:08.59
IV.MMGO.HNE. ML:2.1 0.00157 0.08 AML other m 2021-10-07T15:30:08.59
IV.MMGO.HHN. ML:2.3 0.0024939045 0.1024 AML other m 2021-10-07T15:30:08.63
IV.MMGO.HNN. ML:2.3 0.002545752 0.128 AML other m 2021-10-07T15:30:08.63
IV.MFNL.HHN. ML:1.5 0.00040998325 0.6144 AML other m 2021-10-07T15:30:10.05
IV.MFNL.HHE. ML:1.6 0.0004715 0.08 AML other m 2021-10-07T15:30:09.79
IV.MBFT.HHE. ML:1 5.5696255E-5 0.2816 AML other m 2021-10-07T15:30:13.66
IV.MBFT.HHN. ML:1 6.4691915E-5 0.256 AML other m 2021-10-07T15:30:13.48
IV.MTGR.HHE. ML:0.7 2.33373165E-5 1.1136 AML other m 2021-10-07T15:30:12.91
IV.MTGR.HHN. ML:1.2 8.7838845E-5 0.9856 AML other m 2021-10-07T15:30:14.02
IV.SCIAC.HHE. ML:1.4 0.00014855665 0.1408 AML other m 2021-10-07T15:30:14.15
IV.SCIAC.HHN. ML:1.4 0.0001317672 0.1536 AML other m 2021-10-07T15:30:15.66
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