Earthquake with magnitude of ML 1.5 on date 20-02-2020 and time 21:04:51 (Italy) in region 4 km W Polizzi Generosa (PA)

A magnitude ML 1.5 earthquake occured in region: 4 km W Polizzi Generosa (PA), on

  • 20-02-2020 20:04:51 (UTC)
  • 20-02-2020 21:04:51 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 37.81, 13.96 at 9 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 4 3407 3407
Caltavuturo PA 6 4017 7424
Scillato PA 7 613 8037
Castellana Sicula PA 8 3411 11448
Sclafani Bagni PA 9 426 11874
Petralia Sottana PA 12 2821 14695
Collesano PA 12 4054 18749
Blufi PA 13 1029 19778
Valledolmo PA 13 3594 23372
Petralia Soprana PA 14 3360 26732
Bompietro PA 15 1401 28133
Isnello PA 15 1589 29722
Cerda PA 16 5330 35052
Resuttano CL 16 2038 37090
Aliminusa PA 16 1236 38326
Gratteri PA 17 963 39289
Montemaggiore Belsito PA 18 3365 42654
Castelbuono PA 18 8943 51597
Geraci Siculo PA 18 1945 53542
Vallelunga Pratameno CL 18 3461 57003
Alimena PA 19 2032 59035

Municipalities with at least 50000 inhabitants

An earthquake occurred to
37 Km N of Caltanissetta (63360 inhabitants)
49 Km SE of Bagheria (55387 inhabitants)
62 Km SE of Palermo (674435 inhabitants)
65 Km NE of Agrigento (59770 inhabitants)
87 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
20:04:51
37.81 13.96 9 2020-02-20
20:16:42
Sala Sismica INGV-Roma 76680751
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-02-20 20:04:51 ± 0.23
Latitude 37.81 ± 0.01
Longitude 13.96 ± 0.01
Depth (km) 9 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 76680751

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1327
Semi-minor axis of confidence ellipse (meter) 787
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 324
Circular confidence region, given by single value of horizontal uncertainty (meter) 1330
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 98
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) 0.43
Epicentral distance of station closest to the epicenter (degree) 0.12591
Epicentral distance of station farthest from the epicenter (degree) 0.52161
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 0.2
Num. used stations 8
Type of magnitude ML
Reference to an origin 76680751
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-02-20 20:16:42
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.CORL.HHE. 2020-02-20T20:05:02.70 0.1 undecidable manual P 279 0.5216 50 0.31 91
IV.PLLN.EHZ. 2020-02-20T20:05:01.29 0.3 undecidable manual S 39 0.2311 109 0.12 75
IV.ALJA.HHZ. 2020-02-20T20:04:59.32 0.6 undecidable manual S 248 0.1736 115 0.22 50
IV.GIB.HHZ. 2020-02-20T20:04:59.99 0.6 undecidable manual S 17 0.1844 113 0.5 47
IV.CSLB.HHZ. 2020-02-20T20:04:59.08 0.3 undecidable manual S 33 0.1466 118 0.89 60
IV.PETRA.HHZ. 2020-02-20T20:04:57.55 0.6 undecidable manual S 81 0.1259 122 0.05 52
IV.PLLN.EHZ. 2020-02-20T20:04:56.76 0.6 positive manual P 39 0.2311 109 -0.44 47
IV.RESU.HHZ. 2020-02-20T20:04:56.60 0.1 undecidable manual P 155 0.1844 113 0.38 96
IV.ALJA.HHZ. 2020-02-20T20:04:55.71 0.1 undecidable manual P 248 0.1736 115 -0.28 98
IV.GIB.HHZ. 2020-02-20T20:04:55.86 0.1 undecidable manual P 17 0.1844 113 -0.36 96
IV.PETRA.HHZ. 2020-02-20T20:04:54.85 0.1 undecidable manual P 81 0.1259 122 -0.22 100
IV.CSLB.HHZ. 2020-02-20T20:04:54.80 0.1 undecidable manual P 33 0.1466 118 -0.68 88
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CSLB.HHE. ML:1.4 0.0002295 1.6 AML other m 2020-02-20T20:04:59.03
IV.CSLB.HHN. ML:1.2 0.0001555 0.28 AML other m 2020-02-20T20:05:00.61
IV.GIB.HHN. ML:1.8 0.000431 0.5 AML other m 2020-02-20T20:05:00.76
IV.PETRA.HHN. ML:1.7 0.000506 0.96 AML other m 2020-02-20T20:05:01.63
IV.PETRA.HHE. ML:1.7 0.0005735 0.64 AML other m 2020-02-20T20:05:01.42
IV.GIB.HHE. ML:1.6 0.0003195 0.3 AML other m 2020-02-20T20:05:02.35
IV.RESU.HHN. ML:1.4 0.00018 0.64 AML other m 2020-02-20T20:05:02.53
IV.RESU.HHE. ML:1.4 0.000185 1.36 AML other m 2020-02-20T20:05:07.74
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