Earthquake with magnitude of ML 1.9 on date 31-07-2020 and time 16:57:11 (Italy) in region 2 km SE Salaparuta (TP)

A magnitude ML 1.9 earthquake occured in region: 2 km SE Salaparuta (TP), on

  • 31-07-2020 14:57:11 (UTC)
  • 31-07-2020 16:57:11 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.74, 13.02 at 4 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 3 1494 3190
Montevago AG 5 3006 6196
Santa Margherita di Belice AG 6 6363 12559
Partanna TP 12 10607 23166
Santa Ninfa TP 13 5043 28209
Sambuca di Sicilia AG 13 5877 34086
Contessa Entellina PA 15 1766 35852
Gibellina TP 15 4115 39967
Roccamena PA 16 1505 41472
Menfi AG 17 12592 54064
Camporeale PA 19 3373 57437

Municipalities with at least 50000 inhabitants

An earthquake occurred to
39 Km E of Mazara del Vallo (51718 inhabitants)
51 Km SW of Palermo (674435 inhabitants)
52 Km E of Marsala (83194 inhabitants)
54 Km SE of Trapani (68759 inhabitants)
57 Km SW of Bagheria (55387 inhabitants)
69 Km NW of Agrigento (59770 inhabitants)
96 Km W of Caltanissetta (63360 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 1.9 2020-07-31
14:57:11
37.74 13.02 5 2020-07-31
15:08:50
Sala Sismica INGV-Roma 81508131
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-07-31 14:57:11 ± 0.08
Latitude 37.74 ± 0.00
Longitude 13.02 ± 0.01
Depth (km) 5 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 81508131

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 411
Semi-minor axis of confidence ellipse (meter) 380
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 35
Circular confidence region, given by single value of horizontal uncertainty (meter) 410
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 74
Number of associated phases, regardless of their use for origin computation 15
Number of defining phases 13
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.22
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.84266
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 8
Magnitude information

ML:1.9

Field Value
Value 1.9
Uncertainty 0.3
Num. used stations 6
Type of magnitude ML
Reference to an origin 81508131
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-07-31 15:08:50
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.PLLN.EHZ. 2020-07-31T14:57:45.79 3.0 undecidable manual S -1.1 0
IV.PLLN.EHZ. 2020-07-31T14:57:32.20 3.0 negative manual P 0.6 0
IV.GIB.HHE. 2020-07-31T14:57:28.55 0.6 undecidable manual P 72 0.8319 50 0.23 42
IV.CSLB.HHE. 2020-07-31T14:57:28.67 0.3 undecidable manual P 76 0.8427 50 0.17 64
IV.MARS.EHZ. 2020-07-31T14:57:25.86 0.3 undecidable manual S 272 0.3597 96 0.09 72
IV.MPG.HHE. 2020-07-31T14:57:22.34 0.6 undecidable manual P 33 0.4964 50 -0.25 45
MN.CLTB.HHZ. 2020-07-31T14:57:20.78 0.3 undecidable manual S 137 0.2275 100 0.05 74
IV.MBFT.HHZ. 2020-07-31T14:57:20.17 0.3 undecidable manual S 346 0.2086 101 0.13 73
IV.CAVT.HHZ. 2020-07-31T14:57:20.81 0.3 undecidable manual S 253 0.2185 101 0.42 69
IV.MARS.EHZ. 2020-07-31T14:57:19.40 0.1 undecidable manual P 272 0.3597 96 -0.48 88
IV.MBFT.HHZ. 2020-07-31T14:57:16.55 0.1 undecidable manual P 346 0.2086 101 -0.03 100
IV.CAVT.HHZ. 2020-07-31T14:57:16.67 0.1 positive manual P 253 0.2185 101 -0.11 98
MN.CLTB.HHZ. 2020-07-31T14:57:16.85 0.3 undecidable manual P 137 0.2275 100 -0.12 73
IV.MMGO.HHZ. 2020-07-31T14:57:15.45 0.3 undecidable manual S 202 0.0881 115 -0.13 75
IV.MMGO.HHZ. 2020-07-31T14:57:14.16 0.1 undecidable manual P 202 0.0881 115 0.16 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MBFT.HHE. ML:1.9 0.00058141575 0.32 AML other m 2020-07-31T14:57:20.60
IV.MBFT.HHN. ML:1.8 0.00038359855 0.1792 AML other m 2020-07-31T14:57:21.05
IV.CAVT.HHE. ML:2.3 0.001278931 0.0896 AML other m 2020-07-31T14:57:21.55
IV.CAVT.HHN. ML:2.2 0.0011282695 0.128 AML other m 2020-07-31T14:57:21.55
MN.CLTB.HHE. ML:2.6 0.0027920235 0.2176 AML other m 2020-07-31T14:57:21.37
MN.CLTB.HHN. ML:2.9 0.0048881815 0.4864 AML other m 2020-07-31T14:57:27.11
IV.MARS.EHE. ML:1.7 0.00017966715 0.1792 AML other m 2020-07-31T14:57:26.50
IV.MARS.EHN. ML:1.8 0.00019992545 0.1536 AML other m 2020-07-31T14:57:27.34
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