Earthquake with magnitude of ML 1.8 on date 20-02-2020 and time 02:42:06 (Italy) in region 2 km W Polizzi Generosa (PA)

A magnitude ML 1.8 earthquake occured in region: 2 km W Polizzi Generosa (PA), on

  • 20-02-2020 01:42:06 (UTC)
  • 20-02-2020 02:42:06 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 37.81, 13.98 at 23 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 2 3407 3407
Castellana Sicula PA 6 3411 6818
Caltavuturo PA 8 4017 10835
Scillato PA 8 613 11448
Petralia Sottana PA 10 2821 14269
Blufi PA 11 1029 15298
Sclafani Bagni PA 11 426 15724
Petralia Soprana PA 11 3360 19084
Bompietro PA 13 1401 20485
Collesano PA 13 4054 24539
Isnello PA 15 1589 26128
Valledolmo PA 15 3594 29722
Resuttano CL 15 2038 31760
Geraci Siculo PA 16 1945 33705
Castelbuono PA 17 8943 42648
Gratteri PA 17 963 43611
Alimena PA 18 2032 45643
Cerda PA 18 5330 50973
Aliminusa PA 19 1236 52209
Montemaggiore Belsito PA 20 3365 55574
Vallelunga Pratameno CL 20 3461 59035
Gangi PA 20 6811 65846

Municipalities with at least 50000 inhabitants

An earthquake occurred to
36 Km N of Caltanissetta (63360 inhabitants)
51 Km SE of Bagheria (55387 inhabitants)
64 Km SE of Palermo (674435 inhabitants)
66 Km NE of Agrigento (59770 inhabitants)
86 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 1.8 2020-02-20
01:42:06
37.81 13.98 23 2020-02-20
01:50:26
Sala Sismica INGV-Roma 76660101
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-02-20 01:42:06 ± 0.54
Latitude 37.81 ± 0.02
Longitude 13.98 ± 0.02
Depth (km) 23 ± 4 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 76660101

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 2080
Semi-minor axis of confidence ellipse (meter) 412
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 345
Circular confidence region, given by single value of horizontal uncertainty (meter) 2080
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 91
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) 0.49
Epicentral distance of station closest to the epicenter (degree) 0.10702
Epicentral distance of station farthest from the epicenter (degree) 0.45056
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:1.8

Field Value
Value 1.8
Uncertainty 0.2
Num. used stations 6
Type of magnitude ML
Reference to an origin 76660101
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-02-20 01:50:26
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.ALJA.HHZ. 2020-02-20T01:42:16.16 0.3 undecidable manual S 251 0.1907 132 0.1 75
IV.GIB.HHZ. 2020-02-20T01:42:16.30 0.3 undecidable manual S 11 0.1808 134 0.46 71
IV.SOLUN.HHE. 2020-02-20T01:42:16.42 0.1 undecidable manual P 308 0.4506 108 0.46 90
IV.PLLN.EHZ. 2020-02-20T01:42:16.99 0.3 undecidable manual S 35 0.2203 127 0.25 74
IV.RESU.HHZ. 2020-02-20T01:42:12.41 0.1 undecidable manual P 160 0.1763 135 0.56 91
IV.PLLN.EHZ. 2020-02-20T01:42:12.62 0.1 undecidable manual P 35 0.2203 127 0.19 100
IV.ALJA.HHZ. 2020-02-20T01:42:11.51 0.1 undecidable manual P 251 0.1907 132 -0.53 94
IV.GIB.HHZ. 2020-02-20T01:42:11.75 0.1 undecidable manual P 11 0.1808 134 -0.16 100
IV.CSLB.HHZ. 2020-02-20T01:42:10.70 0.1 positive manual P 26 0.1385 142 -0.73 85
IV.PETRA.HHE. 2020-02-20T01:42:10.77 0.1 undecidable manual P 79 0.107 149 -0.35 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CSLB.HHE. ML:1.6 0.0002356578 0.26 AML other m 2020-02-20T01:42:17.18
IV.CSLB.HHN. ML:1.6 0.000241154 0.26 AML other m 2020-02-20T01:42:16.28
IV.ALJA.HHN. ML:2 0.00044035555 0.24 AML other m 2020-02-20T01:42:16.76
IV.GIB.HHE. ML:1.9 0.0004233217 0.4 AML other m 2020-02-20T01:42:18.18
IV.GIB.HHN. ML:2.1 0.000669592 0.5 AML other m 2020-02-20T01:42:16.55
IV.RESU.HHE. ML:1.8 0.00028586905 0.42 AML other m 2020-02-20T01:42:23.37
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