Earthquake with magnitude of ML 1.9 on date 21-02-2020 and time 06:05:39 (Italy) in region 4 km W Polizzi Generosa (PA)

A magnitude ML 1.9 earthquake occured in region: 4 km W Polizzi Generosa (PA), on

  • 21-02-2020 05:05:39 (UTC)
  • 21-02-2020 06:05:39 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 37.83, 13.96 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.

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
Scillato PA 6 613 4020
Caltavuturo PA 6 4017 8037
Sclafani Bagni PA 9 426 8463
Castellana Sicula PA 9 3411 11874
Collesano PA 11 4054 15928
Petralia Sottana PA 12 2821 18749
Blufi PA 13 1029 19778
Isnello PA 14 1589 21367
Petralia Soprana PA 14 3360 24727
Valledolmo PA 14 3594 28321
Cerda PA 15 5330 33651
Bompietro PA 15 1401 35052
Gratteri PA 16 963 36015
Aliminusa PA 16 1236 37251
Castelbuono PA 17 8943 46194
Montemaggiore Belsito PA 17 3365 49559
Resuttano CL 18 2038 51597
Geraci Siculo PA 18 1945 53542
Lascari PA 19 3588 57130
Campofelice di Roccella PA 19 7537 64667
Sciara PA 20 2822 67489
Vallelunga Pratameno CL 20 3461 70950

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)
66 Km NE of Agrigento (59770 inhabitants)
89 Km N of Gela (75827 inhabitants)
Recent and historical seismicity

These maps show the seismicity for different time windows. The earthquake locations reported in these maps are determined in quasi real-time by the personnel on duty in the seismic surveillance center of INGV in Rome. Note that the earthquake source parameters (hypocentral location and magnitude) are the best estimates obstained with the available data and they are adjourned as additional data become available. The source parameters obtained by the personnel on duty are then revised by the group in charge of the INGV Seismic Bulletin (Bollettino Sismico Italiano dell’INGV).

Earthquakes of the 3 days preceding this event

Earthquakes of the 3 days preceding this event *

This map reports the earthquake epicenters located in the 72 hours (3 days) preceding the time of the current earthquake occurrence, using the data acquired by the Italian National Seismic Network and by other collaborating networks in Italy and in the neighbouring countries. The radius of the circle representing the earthquake on the map scales with magnitude. The color depends on the time of occurrence of the earthquakes with respect to the time of generation of the map (red = 1 hour; orange = 24 hours; yellow = 72 hours). The open star shows the epicenter of the current earthquake.
Earthquakes of the 90 days preceding this event

Earthquakes of the 90 days preceding this event *

This map reports the Magnitudo ≥ 1.0 earthquake epicenters located in the 90 days preceding the time of the current earthquake occurrence, using the data acquired by the Italian National Seismic Network and by other collaborating networks in Italy and in the neighbouring countries. The radii of the circles representing the epicenters on the map scale with magnitude. The color of each circle depends on the time of occurrence of the earthquakes with respect to the time of generation of the map (red = 1 hour; orange = 24 hours; yellow = 72 hours; blue = all other earthquakes). The open star shows the epicenter of the current earthquake.
Earthquakes from 1985 to the date of the event

Earthquakes from 1985 to the date of the event *

This map reports the Magnitudo ≥ 2.5 earthquake epicenters located using the data acquired by the Italian National Seismic Network and by other collaborating networks in Italy and in the neighbouring countries. The radii of the circles representing the epicenters on the map scale with magnitude. The color of each circle depends on the time of occurrence of the earthquakes with respect to the time of generation of the map (red = 1 hour; orange = 24 hours; yellow = 72 hours; blue = all other earthquakes). The open star shows the epicenter of the current earthquake.
Earthquakes since 1000 AD until 2019

Earthquakes since 1000 AD until 2019 *

This map shows the epicenters of the historical earthquakes catalogue CPT15 (Catalogo Parametrico dei Terremoti Italiani, 2015 version https://emidius.mi.ingv.it/CPTI15-DBMI15/) with estimated magnitude ≥ 5.0 since 1000 AD until 2014. The epicenters are represented by squares which sides scale with the estimated earthquake magnitude. For earthquakes with magnitude ≥ 6.0, it is also shown the year of occurrence and the magnitude value. The open star shows the epicenter of the current earthquake.
Seismic hazard
Shakemap
Felt maps
Preliminary map of the earthquake effects from the web questionnaire

Preliminary map of the earthquake effects from the web 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
Bulletin
Rev1000
ML 1.9 2020-02-21
05:05:39
37.83 13.96 8 2020-07-18
21:08:37
Bollettino Sismico Italiano INGV 79317321
Reviewed
Rev100
ML 2.1 2020-02-21
05:05:39
37.81 13.97 14 2020-02-21
05:10:09
Sala Sismica INGV-Roma 76692271
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-02-21 05:05:39 ± 0.13
Latitude 37.83 ± 0.01
Longitude 13.96 ± 0.01
Depth (km) 8 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 79317321

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 903
Semi-minor axis of confidence ellipse (meter) 897
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 107
Circular confidence region, given by single value of horizontal uncertainty (meter) 900
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 71
Number of associated phases, regardless of their use for origin computation 19
Number of defining phases 19
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.44
Epicentral distance of station closest to the epicenter (degree) 0.12501
Epicentral distance of station farthest from the epicenter (degree) 0.77072
Number of stations at which the event was observed 13
Number of stations from which data was used for origin computation 13
Magnitudes information

ML:1.9

Field Value
Value 1.9
Uncertainty 0.2
Num. used stations 17
Type of magnitude ML
Reference to an origin 79317321
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-06-07 01:10:29

ML:2.1

Field Value
Value 2.1
Uncertainty 0.2
Num. used stations 12
Type of magnitude ML
Reference to an origin 76692271
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-02-21 05:10:09
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.CRJA.HHZ. 2020-02-21T05:05:55.11 0.3 undecidable manual P 268 0.7527 50 0.76 54
IV.MUCR.HHZ. 2020-02-21T05:05:54.18 0.3 undecidable manual P 73 0.7536 50 -0.19 64
IV.IACL.HHZ. 2020-02-21T05:05:54.89 0.3 undecidable manual P 24 0.7707 50 0.23 63
IV.CORL.HHZ. 2020-02-21T05:05:50.42 0.3 undecidable manual P 278 0.5198 50 0.06 69
IV.SOLUN.HHZ. 2020-02-21T05:05:48.40 0.3 undecidable manual P 308 0.4263 50 -0.36 66
IV.CMDO.HHZ. 2020-02-21T05:05:48.88 0.3 undecidable manual P 196 0.3786 50 0.93 54
IV.PLLN.EHZ. 2020-02-21T05:05:48.82 0.6 undecidable manual S 42 0.2203 108 0.18 48
IV.RESU.HHZ. 2020-02-21T05:05:48.56 0.6 undecidable manual S 156 0.197 110 0.76 40
IV.GIB.HHZ. 2020-02-21T05:05:48.00 0.6 undecidable manual S 19 0.1709 113 1.14 34
IV.ALJA.HHZ. 2020-02-21T05:05:47.64 0.6 undecidable manual S 244 0.179 112 0.51 45
IV.MCT.HHN. 2020-02-21T05:05:46.93 0.3 undecidable manual P 233 0.3462 50 -0.47 66
IV.CSLB.HHZ. 2020-02-21T05:05:46.31 0.3 undecidable manual S 36 0.1358 119 0.69 63
IV.PETRA.HHZ. 2020-02-21T05:05:45.31 0.1 undecidable manual S 87 0.125 121 0.05 100
IV.PLLN.EHZ. 2020-02-21T05:05:44.44 0.1 undecidable manual P 42 0.2203 108 -0.41 91
IV.RESU.HHZ. 2020-02-21T05:05:44.13 0.1 undecidable manual P 156 0.197 110 -0.24 95
IV.GIB.HHZ. 2020-02-21T05:05:43.66 0.1 positive manual P 19 0.1709 113 -0.17 97
IV.ALJA.HHZ. 2020-02-21T05:05:43.25 0.3 undecidable manual P 244 0.179 112 -0.74 61
IV.PETRA.HHZ. 2020-02-21T05:05:42.59 0.1 positive manual P 87 0.125 121 -0.31 95
IV.CSLB.HHZ. 2020-02-21T05:05:42.65 0.1 positive manual P 36 0.1358 119 -0.46 92
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.PETRA.HHE. ML:2 0.0011780099 0.3808 AML other m 2020-02-21T05:05:45.73
IV.PETRA.HHN. ML:1.9 0.00087260685 0.32 AML other m 2020-02-21T05:05:45.58
IV.CSLB.HHE. ML:1.6 0.00040202335 0.8416 AML other m 2020-02-21T05:05:46.38
IV.CSLB.HHN. ML:1.6 0.0004387605 0.5984 AML other m 2020-02-21T05:05:46.71
IV.GIB.HHN. ML:2.3 0.001661498 0.3808 AML other m 2020-02-21T05:05:48.33
IV.GIB.HHE. ML:2.2 0.0011612305 0.2976 AML other m 2020-02-21T05:05:49.25
IV.PLLN.EHN. ML:1.7 0.00031015055 1.1808 AML other m 2020-02-21T05:05:49.12
IV.RESU.HHN. ML:1.9 0.00064706825 0.3808 AML other m 2020-02-21T05:05:49.69
IV.ALJA.HHN. ML:2 0.00079974425 0.2592 AML other m 2020-02-21T05:05:50.32
IV.RESU.HHE. ML:1.9 0.00058882255 0.4 AML other m 2020-02-21T05:05:51.00
IV.PLLN.EHE. ML:2 0.0007025841 0.9024 AML other m 2020-02-21T05:05:52.01
IV.SOLUN.HHN. ML:1.6 0.00010034203 1.5616 AML other m 2020-02-21T05:05:56.35
IV.SOLUN.HHE. ML:1.7 0.0001466842 0.72 AML other m 2020-02-21T05:05:56.73
IV.MUCR.HHE. ML:1.8 8.252388E-5 1.44 AML other m 2020-02-21T05:06:09.76
IV.MUCR.HHN. ML:1.8 8.6492435E-5 0.88 AML other m 2020-02-21T05:06:09.83
IV.IACL.HHN. ML:2.2 0.00018072555 0.4992 AML other m 2020-02-21T05:06:10.10
IV.IACL.HHE. ML:2.2 0.00020841855 0.5408 AML other m 2020-02-21T05:06:10.88
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Fault Plane solutions

Fault Plane solutions *

This map reports the focal mechanisms since 1977 in the region. The white and red beach ball symbols are mechanisms determined using the Regional Centroid Moment Tensor (RCMT, http://www.bo.ingv.it/RCMT) and are determined for earthquakes with magnitude larger than 4.5 in the Euro-Mediterranenan area. Occasionally, when there is a good source-receiver geometry of the target earthquake, the RCMT can be obtained also for earthquakes with magnitude larger than 4.0. The blue and white beach ball symbols indicate the mechanisms obtained from application of the Time Domain Moment Tensor (TDMT, http://terremoti.ingv.it/tdmt.html). This technique is used for M ≥ 3.5. The size of the beach ball sysmbol scales with the calculated moment magnitude, Mw.
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download
Waveforms Seismic signals in miniseed + resp format Download