Earthquake with magnitude of ML 0.5 on date 21-02-2020 and time 16:34:08 (UTC) in region 3 km N Polizzi Generosa (PA)

A magnitude ML 0.5 earthquake occured in region: 3 km N Polizzi Generosa (PA), on

  • 21-02-2020 16:34:08 (UTC)
  • 21-02-2020 17:34:08 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 37.84, 14 at 6 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 3 3407 3407
Castellana Sicula PA 7 3411 6818
Petralia Sottana PA 9 2821 9639
Scillato PA 9 613 10252
Caltavuturo PA 10 4017 14269
Petralia Soprana PA 10 3360 17629
Collesano PA 11 4054 21683
Blufi PA 11 1029 22712
Isnello PA 12 1589 24301
Bompietro PA 13 1401 25702
Sclafani Bagni PA 13 426 26128
Castelbuono PA 13 8943 35071
Geraci Siculo PA 14 1945 37016
Gratteri PA 15 963 37979
Resuttano CL 18 2038 40017
Cerda PA 18 5330 45347
Valledolmo PA 18 3594 48941
Gangi PA 18 6811 55752
Alimena PA 19 2032 57784
San Mauro Castelverde PA 19 1701 59485
Lascari PA 19 3588 63073
Aliminusa PA 20 1236 64309

Municipalities with at least 50000 inhabitants

An earthquake occurred to
39 Km N of Caltanissetta (63360 inhabitants)
51 Km SE of Bagheria (55387 inhabitants)
64 Km SE of Palermo (674435 inhabitants)
69 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 0.5 2020-02-21
16:34:08
37.84 14 6 2020-02-21
16:44:23
Sala Sismica INGV-Roma 76704521
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-02-21 16:34:08 ± 0.16
Latitude 37.84 ± 0.00
Longitude 14.00 ± 0.01
Depth (km) 6 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 76704521

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 874
Semi-minor axis of confidence ellipse (meter) 420
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 265
Circular confidence region, given by single value of horizontal uncertainty (meter) 870
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 200
Number of associated phases, regardless of their use for origin computation 11
Number of defining phases 8
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.18
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.19425
Number of stations at which the event was observed 7
Number of stations from which data was used for origin computation 4
Magnitude information

ML:0.5

Field Value
Value 0.5
Uncertainty 0.2
Num. used stations 5
Type of magnitude ML
Reference to an origin 76704521
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-02-21 16:44:23
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.EMSG.HHZ. 2020-02-21T16:34:35.99 3.0 undecidable manual P 0
IV.RESU.HHZ. 2020-02-21T16:34:16.70 0.6 undecidable manual S 167 0.1943 106 -0.04 50
IV.FERC.HNZ. 2020-02-21T16:34:15.39 3.0 undecidable manual P -0.01 0
IV.MUCR.HHZ. 2020-02-21T16:34:15.99 3.0 undecidable manual P 0
IV.GIB.HHE. 2020-02-21T16:34:15.60 0.6 undecidable manual S 7 0.1547 110 0.32 47
IV.RESU.HHZ. 2020-02-21T16:34:13.43 0.6 positive manual P 167 0.1943 106 -0.01 50
IV.CSLB.HHZ. 2020-02-21T16:34:13.50 0.6 undecidable manual S 23 0.1097 117 -0.2 49
IV.PETRA.HHZ. 2020-02-21T16:34:12.90 0.6 undecidable manual S 92 0.0881 123 -0.08 50
IV.GIB.HHE. 2020-02-21T16:34:12.56 0.1 undecidable manual P 7 0.1547 110 -0.04 100
IV.CSLB.HHZ. 2020-02-21T16:34:11.42 0.6 positive manual P 23 0.1097 117 -0.26 48
IV.PETRA.HHZ. 2020-02-21T16:34:11.45 0.1 positive manual P 92 0.0881 123 0.18 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.PETRA.HHN. ML:0.8 9.375E-5 1.24 AML other m 2020-02-21T16:34:18.71
IV.CSLB.HHN. ML:0.4 3.615E-5 0.78 AML other m 2020-02-21T16:34:18.25
IV.PETRA.HHE. ML:0.6 6.535E-5 0.74 AML other m 2020-02-21T16:34:21.75
IV.RESU.HHE. ML:0.5 2.4470745E-5 1.6128 AML other m 2020-02-21T16:34:17.27
IV.RESU.HHN. ML:0.7 3.306867E-5 1.2032 AML other m 2020-02-21T16:34:16.49
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