Earthquake with magnitude of ML 1.5 on date 20-02-2020 and time 20:47:18 (Italy) in region 5 km W Polizzi Generosa (PA)

A magnitude ML 1.5 earthquake occured in region: 5 km W Polizzi Generosa (PA), on

  • 20-02-2020 19:47:18 (UTC)
  • 20-02-2020 20:47:18 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 37.82, 13.95 at 18 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
Polizzi Generosa PA 5 3407 3407
Caltavuturo PA 5 4017 7424
Scillato PA 6 613 8037
Sclafani Bagni PA 8 426 8463
Castellana Sicula PA 9 3411 11874
Collesano PA 12 4054 15928
Petralia Sottana PA 13 2821 18749
Valledolmo PA 13 3594 22343
Blufi PA 13 1029 23372
Petralia Soprana PA 14 3360 26732
Isnello PA 15 1589 28321
Cerda PA 15 5330 33651
Bompietro PA 15 1401 35052
Aliminusa PA 16 1236 36288
Montemaggiore Belsito PA 17 3365 39653
Gratteri PA 17 963 40616
Resuttano CL 17 2038 42654
Castelbuono PA 18 8943 51597
Vallelunga Pratameno CL 18 3461 55058
Geraci Siculo PA 19 1945 57003
Sciara PA 20 2822 59825

Municipalities with at least 50000 inhabitants

An earthquake occurred to
38 Km N of Caltanissetta (63360 inhabitants)
48 Km SE of Bagheria (55387 inhabitants)
61 Km SE of Palermo (674435 inhabitants)
65 Km NE of Agrigento (59770 inhabitants)
88 Km N of Gela (75827 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
Rev 100 ML 1.5 2020-02-20
19:47:18
37.82 13.95 18 2020-02-20
20:15:54
Sala Sismica INGV-Roma 76680741
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-02-20 19:47:18 ± 0.44
Latitude 37.82 ± 0.02
Longitude 13.95 ± 0.02
Depth (km) 18 ± 3 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 76680741

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1639
Semi-minor axis of confidence ellipse (meter) 1617
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 302
Circular confidence region, given by single value of horizontal uncertainty (meter) 1640
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 133
Number of associated phases, regardless of their use for origin computation 10
Number of defining phases 10
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.5
Epicentral distance of station closest to the epicenter (degree) 0.1313
Epicentral distance of station farthest from the epicenter (degree) 0.23203
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:1.5

Field Value
Value 1.5
Uncertainty 0.2
Num. used stations 6
Type of magnitude ML
Reference to an origin 76680741
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-02-20 20:15:54
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.GIB.HHZ. 2020-02-20T19:47:27.88 0.3 undecidable manual S 19 0.1826 122 0.74 62
IV.ALJA.HHZ. 2020-02-20T19:47:26.90 0.6 undecidable manual S 246 0.1691 125 0.08 49
IV.CSLB.HHZ. 2020-02-20T19:47:26.79 0.6 undecidable manual S 36 0.1466 130 0.5 45
IV.PETRA.HHZ. 2020-02-20T19:47:25.41 0.6 undecidable manual S 83 0.1313 133 -0.55 44
IV.PLLN.EHZ. 2020-02-20T19:47:24.48 0.1 undecidable manual P 41 0.232 114 0.15 97
IV.RESU.HHZ. 2020-02-20T19:47:24.36 0.1 undecidable manual P 154 0.1916 120 0.65 85
IV.ALJA.HHZ. 2020-02-20T19:47:23.34 0.1 undecidable manual P 246 0.1691 125 -0.05 100
IV.GIB.HHZ. 2020-02-20T19:47:23.44 0.1 undecidable manual P 19 0.1826 122 -0.14 97
IV.PETRA.HHZ. 2020-02-20T19:47:22.46 0.1 undecidable manual P 83 0.1313 133 -0.43 92
IV.CSLB.HHZ. 2020-02-20T19:47:22.41 0.1 undecidable manual P 36 0.1466 130 -0.68 84
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CSLB.HHE. ML:1.2 0.000105435725 0.256 AML other m 2020-02-20T19:47:27.01
IV.CSLB.HHN. ML:1.2 0.00011355775 0.6272 AML other m 2020-02-20T19:47:26.81
IV.PETRA.HHE. ML:1.7 0.00035681335 0.256 AML other m 2020-02-20T19:47:26.28
IV.PETRA.HHN. ML:1.7 0.00032603375 0.3584 AML other m 2020-02-20T19:47:28.33
IV.ALJA.HHN. ML:1.5 0.0002147591 0.2048 AML other m 2020-02-20T19:47:28.61
IV.GIB.HHN. ML:1.7 0.00028447975 0.6656 AML other m 2020-02-20T19:47:28.04
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