Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.4 on date 20-02-2020 and time 19:47:19 (UTC) in region 4 km W Polizzi Generosa (PA)

A magnitude ML 1.4 earthquake occured in region: 4 km W Polizzi Generosa (PA), on

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

and geographic coordinates (lat, lon) 37.8230, 13.9580 at 8 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

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.

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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 6 613 8037
Castellana Sicula PA 9 3411 11448
Sclafani Bagni PA 9 426 11874
Collesano PA 11 4054 15928
Petralia Sottana PA 12 2821 18749
Blufi PA 13 1029 19778
Petralia Soprana PA 14 3360 23138
Valledolmo PA 14 3594 26732
Isnello PA 14 1589 28321
Bompietro PA 15 1401 29722
Cerda PA 15 5330 35052
Gratteri PA 16 963 36015
Aliminusa PA 16 1236 37251
Castelbuono PA 17 8943 46194
Resuttano CL 17 2038 48232
Montemaggiore Belsito PA 17 3365 51597
Geraci Siculo PA 18 1945 53542
Vallelunga Pratameno CL 19 3461 57003
Lascari PA 20 3588 60591
Alimena PA 20 2032 62623
Campofelice di Roccella PA 20 7537 70160

Municipalities with at least 50000 inhabitants

An earthquake occurred to
38 Km N of Caltanissetta (63360 inhabitants)
49 Km SE of Bagheria (55387 inhabitants)
62 Km SE of Palermo (674435 inhabitants)
66 Km NE of Agrigento (59770 inhabitants)
88 Km N of Gela (75827 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Bulletin
Rev1000 		ML 1.4 2020-02-20
19:47:19		 37.8233 13.9583 8 2020-07-18
21:08:28		 Bollettino Sismico Italiano INGV 77539021
Reviewed
Rev100 		ML 1.5 2020-02-20
19:47:18		 37.8183 13.9492 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 19:47:19 ± 0.18
Latitude 37.8233 ± 0.0063
Longitude 13.9583 ± 0.0091
Depth (km) 8 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 77539021

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 785
Semi-minor axis of confidence ellipse (meter) 421
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 311
Circular confidence region, given by single value of horizontal uncertainty (meter) 790.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 100
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) 0.28
Epicentral distance of station closest to the epicenter (degree) 0.12411
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
Magnitudes information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.2
Num. used stations 6
Type of magnitude ML
Reference to an origin 77539021
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-03-24 17:48:05

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(km) Takeoff_angle Residual Weight
IV.CORL.HHZ. 2020-02-20T19:47:30.44 0.6 undecidable manual P 278 57.8976 50 0.32 44
IV.GIB.HHZ. 2020-02-20T19:47:27.17 0.6 undecidable manual S 18 19.4694 112 0.49 46
IV.RESU.HHZ. 2020-02-20T19:47:27.59 0.6 undecidable manual S 156 21.3675 111 0.27 48
IV.ALJA.HHZ. 2020-02-20T19:47:26.90 0.6 undecidable manual S 245 19.7691 112 0.11 49
IV.CSLB.HHZ. 2020-02-20T19:47:26.04 0.6 undecidable manual S 34 15.3735 118 0.63 43
IV.PETRA.HHZ. 2020-02-20T19:47:24.74 0.6 undecidable manual S 85 13.7751 120 -0.17 49
IV.RESU.HHZ. 2020-02-20T19:47:24.17 0.3 undecidable manual P 156 21.3675 111 0.2 72
IV.PLLN.EHZ. 2020-02-20T19:47:24.48 0.1 undecidable manual P 41 24.753 108 -0.13 97
IV.ALJA.HHZ. 2020-02-20T19:47:23.34 0.3 undecidable manual P 245 19.7691 112 -0.32 71
IV.GIB.HHZ. 2020-02-20T19:47:23.53 0.3 undecidable manual P 18 19.4694 112 -0.07 75
IV.CSLB.HHZ. 2020-02-20T19:47:22.46 0.1 positive manual P 34 15.3735 118 -0.4 93
IV.PETRA.HHZ. 2020-02-20T19:47:22.49 0.1 positive manual P 85 13.7751 120 -0.09 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.PETRA.HHE. ML:1.5 0.00035681335000000005 0.256 AML other m 2020-02-20T19:47:26.28
IV.CSLB.HHN. ML:1.1 0.00011355775000000001 1.3728 AML other m 2020-02-20T19:47:26.81
IV.CSLB.HHE. ML:1.0 0.00010543572500000001 0.256 AML other m 2020-02-20T19:47:27.01
IV.GIB.HHN. ML:1.6 0.00028447975 0.6656 AML other m 2020-02-20T19:47:28.04
IV.PETRA.HHN. ML:1.5 0.00032603375 0.3584 AML other m 2020-02-20T19:47:28.33
IV.ALJA.HHN. ML:1.4 0.0002147591 0.2048 AML other m 2020-02-20T19:47:28.61
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